GRPC Component

Properties Methods Events Config Settings Errors

The GRPC component is designed to send and receive messages over gRPC. The component can be used to both create messages to send as well as read incoming messages.

Syntax

TipwGRPC

Remarks

The GRPC component is designed to send and receive messages over gRPC and operates using an HTTP/2 client. This component can be used to construct a message with fields as defined in the .proto configuration file. The created message can be sent through gRPC using the Post method. If the request requires authorization, you can set the Authorization property to the authorization header. Also, the component can be used to read an incoming message from the server.

The GRPC component supports both plaintext and Secure Sockets Layer/Transport Layer Security (SSL/TLS) connections. When connecting over SSL/TLS the SSLServerAuthentication event allows you to check the server identity and other security attributes. The SSLStatus event provides information about the SSL handshake. Additional SSL related settings are also supported via the Config method.

Reading a Message

The GRPC component can be used to read an incoming message. To read an incoming message, listen to the MessageIn event. The MessageIn event will fire for each message response from the server. For each message response, the MessageData property will get populated with the raw message response from the server. The component can be used to read the response in a structured way.

There are two ways of reading an incoming message. The message can be navigated using the XPath property, or by sequentially reading the values in the message. By providing multiple ways to read a message, you can choose which best suits your needs.

XPath

XPath provides a simple way to navigate the fields within the received message using a subset of the XML XPath specification. The XPath property may be set to navigate to a specific field within the message structure. The HasXPath method may be used to determine whether or not an XPath exists before setting navigating to the location. The TryXPath method will attempt to navigate to the specified path and return True or False depending on the result.

XPath may be set to a series of one or more field accessors separated by '/'. The path can be absolute (starting with '/') or relative to the current XPath location. After setting the XPath property, use any of the following methods to read data or information about the field at the selected path:

ReadBool
ReadBytes
ReadDouble
ReadFieldNumber
ReadFixed32
ReadFixed64
ReadFloat
ReadInt32
ReadInt64
ReadString

The following are possible values for a field accessor:


field_number	The integer number of the field: for instance, `/2` or `/11`
field_number[i]	The i-th occurrence of the field specified by the field_number: for instance, `/2[1]` or `/11[3]`
[index]	The field at the position specified by index: for instance, `/[2]` would select the second field, regardless of the field number
.	The current location
..	The parent of the current location

Nested Messages

When a field of a message is itself another message, the fields of the submessage may be accessed by constructing an XPath to point to the submessage field. For example, /5/4 would move to field number 5 in the top-level message (which is itself a message), and then would move to field number 4 of the submessage.

Packed Repeated Fields

The following example shows the syntax to access values within packed repeated fields. The type of value within the packed repeated field must be known ahead of time. The XCount property can be used to obtain the number of values within the packed repeated field.


/10#v	Select field number 10, which is a packed repeated field of type variant
/11#i	Select field number 11, which is a packed repeated field of type fixed32
/12#l	Select field number 12, which is a packed repeated field of type fixed64
/10#v[2]	Select the 2nd value of field number 10, which is a packed repeated field of type variant
/11#v[2]	Select the 2nd value of field number 11, which is a packed repeated field of type fixed32
/12#v[2]	Select the 2nd value of field number 12, which is a packed repeated field of type fixed64

Example. Iterate through all values within a packed repeated field: gRPC.XPath = "/10#v"; int count = gRPC.XCount; for(int i=0;i<count;i++) { gRPC.XPath = "/10#v[ " + i.ToString() + "]"; Console.WriteLine(Int32.Parse(gRPC.ReadInt32())); }

Sequential Reads

An alternative to using the XPath property is sequentially reading each field within the message. This is done by making use of the MessageIn event and the Read* methods to read the message fields sequentially.

To read a message sequentially, first call BeginReadMessage. Next, call ReadFieldNumber to get the next field number. The component will move automatically to the next field number to read. Then call the appropriate method from the following list to read the field value:

ReadString
ReadInt32
ReadInt64
ReadFloat
ReadFixed32
ReadFixed64
ReadDouble
ReadBytes
ReadBool

Example 1. Read message: // Begins reading a new message grpc.BeginReadMessage(); // Gets the field number for the current field to read String CurrentFieldNumber = grpc.ReadFieldNumber(); // Gets the string value of field with field number 1 String stringField = grpc.ReadString(); // Gets the next field number CurrentFieldNumber = grpc.ReadFieldNumber(); // Gets the int32 value of the field int Int32Field = grpc.ReadInt32(); // Ends reading a message grpc.EndReadMessage();

If the field you want to read is a packed repeated field, then before calling any of the listed methods, call BeginReadPacked. BeginReadPacked returns the count of the repeated values. Call the ReadInt32 method to sequentially read each packed value. When done reading the packed repeated values, call EndReadPacked.

Example 2. Read message example, including a packed repeated field:

// Begins reading a new message grpc.BeginReadMessage(); // Gets the field number for the current field to read String CurrentFieldNumber = grpc.ReadFieldNumber(); // Gets the count of the packed repeated field int count = grpc.BeginReadPacked(0); int[] theValues = new int[count]; for(int i=0 ;i < count; i++) { // Get the values and store them in the theValues array theValues[i] = grpc.ReadInt32(); } // Ends reading a packed repeated field grpc.EndReadPacked(); // Ends reading a message grpc.EndReadMessage();

As a last step, call EndReadMessage.

Writing a Message

The GRPC component can be used to construct a new message. The message can be written sequentially, one field at a time. The message then can be sent through gRPC by using the Post method.

To write a message, first call BeginWriteMessage. Next, call WriteFieldNumber and pass the field number to write. Then call the appropriate method from the following list to write the field value.

WriteString
WriteInt32
WriteInt64
WriteFloat
WriteFixed32
WriteFixed64
WriteDouble
WriteBytes
WriteBool

Example 1. Write message: // Begins writing a new message grpc.BeginWriteMessage(); // Specifies the field number for the current field to write grpc.WriteFieldNumber(1); // Specifies the value of field with field number 1 grpc.WriteString("test"); grpc.WriteFieldNumber(2); grpc.WriteInt32(2); // Ends writing a message grpc.EndWriteMessage();

Example 2. Write message, including a packed repeated field: int[] RepeatedVarInt = new int[] { 3, 270, 86942 }; // Begins writing a new message grpc.BeginWriteMessage(); //Specifies the field number for the current field to write grpc.WriteFieldNumber(1); // Begins writing a packed repeated field grpc.BeginWritePacked(); for(int i=0 ;i < RepeatedVarInt.Length; i++) { // Write each packed value grpc.WriteInt32(RepeatedVarInt[i]); } // Ends writing a packed repeated field grpc.EndWritePacked(); // Ends writing a new message grpc.EndWriteMessage();

As a last step, call EndWriteMessage.

Property List

The following is the full list of the properties of the component with short descriptions. Click on the links for further details.


Authorization	This is the authorization string to be sent to the server.
Connected	This property shows whether the component is connected.
Firewall	A set of properties related to firewall access.
FollowRedirects	This property determines what happens when the server issues a redirect.
GRPCTimeout	The gRPC timeout.
Idle	The current status of the component.
MessageData	This property contains the message in a raw format.
OtherHeaders	This property includes other headers as determined by the user (optional).
ParsedHeaders	This property includes a collection of headers returned from the last request.
Proxy	A set of properties related to proxy access.
SSLAcceptServerCertEncoded	This is the certificate (PEM/Base64 encoded).
SSLCertEncoded	This is the certificate (PEM/Base64 encoded).
SSLCertStore	This is the name of the certificate store for the client certificate.
SSLCertStorePassword	If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store.
SSLCertStoreType	This is the type of certificate store for this certificate.
SSLCertSubject	This is the subject of the certificate used for client authentication.
SSLProvider	This specifies the SSL/TLS implementation to use.
SSLServerCertEncoded	This is the certificate (PEM/Base64 encoded).
Status	This property includes the gRPC status code.
StatusDescription	This property includes a unicode string description of an error, which is physically encoded as UTF-8 followed by percent-encoding.
StatusLine	This property is the first line of the last server response.
Timeout	A timeout for the component.
TransferredData	This property includes the contents of the last response from the server.
TransferredDataLimit	This property specifies the the maximum amount of data to be transferred.
TransferredHeaders	This property includes the complete set of headers as received from the server.
URL	This property includes the URL to post.
XCount	This property includes the number of packed fields or instances of the field specified by XPath .
XPath	This property provides a way to point to a specific field in the message.

Method List

The following is the full list of the methods of the component with short descriptions. Click on the links for further details.


BeginReadMessage	This method begins reading a message.
BeginReadPacked	This method begins reading a repeated packed field.
BeginWriteMessage	This method begins writing a new message.
BeginWritePacked	This method begins writing a new packed repeated field.
CalcAuthorization	This method calculates the Authorization header based on provided credentials.
Config	Sets or retrieves a configuration setting.
DoEvents	Processes events from the internal message queue.
EndReadMessage	This method ends reading a message.
EndReadPacked	This method ends reading a packed repeated field.
EndWriteMessage	This method ends writing a message.
EndWritePacked	This method ends writing a packed repeated field.
HasXPath	This method determines whether a specific element exists in the document.
Interrupt	Interrupt the current method.
Post	This method posts a message to the HTTP server using the HTTP POST method.
ReadBool	This method reads the Boolean value from the current field number and returns it.
ReadBytes	This method reads the value of type byte from the current field number and returns it.
ReadDouble	This method reads the value of type double from the current field number and returns it.
ReadFieldNumber	This method reads the next field number and returns it.
ReadFixed32	This method reads the fixed int32 value from the current field number and returns it.
ReadFixed64	This method reads the fixed int64 value from the current field number and returns it.
ReadFloat	This method reads the float value from the current field number and returns it.
ReadInt32	This method reads the int32 value from the current field number and returns it.
ReadInt64	This method reads the int64 value from the current field number and returns it.
ReadSint32	This method reads the sint32 value from the current field number and returns it.
ReadSint64	This method reads the sint64 value from the current field number and returns it.
ReadSkip	This method skips reading a value from the current field.
ReadString	This method reads the string value from the current field number and returns it.
Reset	Reset the component.
TryXPath	This method navigates to the specified XPath if it exists.
WriteBool	This method writes a Boolean value to the current field number.
WriteBytes	This method writes a value of type byte to the current field number.
WriteDouble	This method writes a value of type double to the current field number.
WriteFieldNumber	This method specifies the field number to write.
WriteFixed32	This method writes a fixed32 value to the current field number.
WriteFixed64	This method writes a fixed64 value to the current field number.
WriteFloat	This method writes a float value to the current field number specified.
WriteInt32	This method writes an int32 value to the current field number.
WriteInt64	This method writes an int64 value to the current field number.
WriteSint32	This method writes an sint32 value to the current field number.
WriteSint64	This method writes an sint64 value to the current field number.
WriteString	This method writes a string value to the current field number.

Event List

The following is the full list of the events fired by the component with short descriptions. Click on the links for further details.


Connected	This event is fired immediately after a connection completes (or fails).
ConnectionStatus	This event is fired to indicate changes in the connection state.
Disconnected	This event is fired when a connection is closed.
EndTransfer	This event is fired when a document finishes transferring.
Error	Fired when information is available about errors during data delivery.
Log	This event fires once for each log message.
MessageIn	This event fires when a message response is sent by the server.
Redirect	This event is fired when a redirection is received from the server.
SSLServerAuthentication	Fired after the server presents its certificate to the client.
SSLStatus	Fired when secure connection progress messages are available.
StartTransfer	This event is fired when a document starts transferring (after the headers).
Status	This event is fired when the HTTP status line is received from the server.
Transfer	This event is fired while a document transfers (delivers document).

Config Settings

The following is a list of config settings for the component with short descriptions. Click on the links for further details.


ContentType	The HTTP2 content-type header value.
HTTP2KeepaliveInterval	The keepalive interval in seconds.
MessageDataHex	The hex encoded data for the current message.
UserAgent	The HTTP2 user-agent header value.
AcceptEncoding	Used to tell the server which types of content encodings the client supports.
AllowHTTPCompression	This property enables HTTP compression for receiving data.
AllowHTTPFallback	Whether HTTP/2 connections are permitted to fallback to HTTP/1.1.
Append	Whether to append data to LocalFile.
Authorization	The Authorization string to be sent to the server.
BytesTransferred	Contains the number of bytes transferred in the response data.
ChunkSize	Specifies the chunk size in bytes when using chunked encoding.
CompressHTTPRequest	Set to true to compress the body of a PUT or POST request.
EncodeURL	If set to True the URL will be encoded by the component.
FollowRedirects	Determines what happens when the server issues a redirect.
GetOn302Redirect	If set to True the component will perform a GET on the new location.
HTTP2HeadersWithoutIndexing	HTTP2 headers that should not update the dynamic header table with incremental indexing.
HTTPVersion	The version of HTTP used by the component.
IfModifiedSince	A date determining the maximum age of the desired document.
KeepAlive	Determines whether the HTTP connection is closed after completion of the request.
KerberosSPN	The Service Principal Name for the Kerberos Domain Controller.
LogLevel	The level of detail that is logged.
MaxRedirectAttempts	Limits the number of redirects that are followed in a request.
NegotiatedHTTPVersion	The negotiated HTTP version.
OtherHeaders	Other headers as determined by the user (optional).
ProxyAuthorization	The authorization string to be sent to the proxy server.
ProxyAuthScheme	The authorization scheme to be used for the proxy.
ProxyPassword	A password if authentication is to be used for the proxy.
ProxyPort	Port for the proxy server (default 80).
ProxyServer	Name or IP address of a proxy server (optional).
ProxyUser	A user name if authentication is to be used for the proxy.
SentHeaders	The full set of headers as sent by the client.
StatusCode	The status code of the last response from the server.
StatusLine	The first line of the last response from the server.
TransferredData	The contents of the last response from the server.
TransferredDataLimit	The maximum number of incoming bytes to be stored by the component.
TransferredHeaders	The full set of headers as received from the server.
TransferredRequest	The full request as sent by the client.
UseChunkedEncoding	Enables or Disables HTTP chunked encoding for transfers.
UseIDNs	Whether to encode hostnames to internationalized domain names.
UseProxyAutoConfigURL	Whether to use a Proxy auto-config file when attempting a connection.
UserAgent	Information about the user agent (browser).
CloseStreamAfterTransfer	If true, the component will close the upload or download stream after the transfer.
ConnectionTimeout	Sets a separate timeout value for establishing a connection.
FirewallAutoDetect	Tells the component whether or not to automatically detect and use firewall system settings, if available.
FirewallHost	Name or IP address of firewall (optional).
FirewallPassword	Password to be used if authentication is to be used when connecting through the firewall.
FirewallPort	The TCP port for the FirewallHost;.
FirewallType	Determines the type of firewall to connect through.
FirewallUser	A user name if authentication is to be used connecting through a firewall.
KeepAliveInterval	The retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received.
KeepAliveTime	The inactivity time in milliseconds before a TCP keep-alive packet is sent.
Linger	When set to True, connections are terminated gracefully.
LingerTime	Time in seconds to have the connection linger.
LocalHost	The name of the local host through which connections are initiated or accepted.
LocalPort	The port in the local host where the component binds.
MaxLineLength	The maximum amount of data to accumulate when no EOL is found.
MaxTransferRate	The transfer rate limit in bytes per second.
ProxyExceptionsList	A semicolon separated list of hosts and IPs to bypass when using a proxy.
TCPKeepAlive	Determines whether or not the keep alive socket option is enabled.
TcpNoDelay	Whether or not to delay when sending packets.
UseIPv6	Whether to use IPv6.
LogSSLPackets	Controls whether SSL packets are logged when using the internal security API.
OpenSSLCADir	The path to a directory containing CA certificates.
OpenSSLCAFile	Name of the file containing the list of CA's trusted by your application.
OpenSSLCipherList	A string that controls the ciphers to be used by SSL.
OpenSSLPrngSeedData	The data to seed the pseudo random number generator (PRNG).
ReuseSSLSession	Determines if the SSL session is reused.
SSLCACerts	A newline separated list of CA certificate to use during SSL client authentication.
SSLCheckCRL	Whether to check the Certificate Revocation List for the server certificate.
SSLCheckOCSP	Whether to use OCSP to check the status of the server certificate.
SSLCipherStrength	The minimum cipher strength used for bulk encryption.
SSLEnabledCipherSuites	The cipher suite to be used in an SSL negotiation.
SSLEnabledProtocols	Used to enable/disable the supported security protocols.
SSLEnableRenegotiation	Whether the renegotiation_info SSL extension is supported.
SSLIncludeCertChain	Whether the entire certificate chain is included in the SSLServerAuthentication event.
SSLKeyLogFile	The location of a file where per-session secrets are written for debugging purposes.
SSLNegotiatedCipher	Returns the negotiated cipher suite.
SSLNegotiatedCipherStrength	Returns the negotiated cipher suite strength.
SSLNegotiatedCipherSuite	Returns the negotiated cipher suite.
SSLNegotiatedKeyExchange	Returns the negotiated key exchange algorithm.
SSLNegotiatedKeyExchangeStrength	Returns the negotiated key exchange algorithm strength.
SSLNegotiatedVersion	Returns the negotiated protocol version.
SSLSecurityFlags	Flags that control certificate verification.
SSLServerCACerts	A newline separated list of CA certificate to use during SSL server certificate validation.
TLS12SignatureAlgorithms	Defines the allowed TLS 1.2 signature algorithms when SSLProvider is set to Internal.
TLS12SupportedGroups	The supported groups for ECC.
TLS13KeyShareGroups	The groups for which to pregenerate key shares.
TLS13SignatureAlgorithms	The allowed certificate signature algorithms.
TLS13SupportedGroups	The supported groups for (EC)DHE key exchange.
AbsoluteTimeout	Determines whether timeouts are inactivity timeouts or absolute timeouts.
FirewallData	Used to send extra data to the firewall.
InBufferSize	The size in bytes of the incoming queue of the socket.
OutBufferSize	The size in bytes of the outgoing queue of the socket.
BuildInfo	Information about the product's build.
CodePage	The system code page used for Unicode to Multibyte translations.
LicenseInfo	Information about the current license.
MaskSensitive	Whether sensitive data is masked in log messages.
UseInternalSecurityAPI	Whether or not to use the system security libraries or an internal implementation.

Authorization Property (GRPC Component)

This is the authorization string to be sent to the server.

Syntax

property Authorization: String read get_Authorization write set_Authorization;

Default Value

Remarks

If the Authorization property contains a non-empty string, an Authorization HTTP request header is added to the request. This header conveys the authorization information to the server.

A common use for this property is to specify OAuth authorization string.

This property is provided whenever the server requires authorization.

Connected Property (GRPC Component)

This property shows whether the component is connected.

Syntax

property Connected: Boolean read get_Connected write set_Connected;

Default Value

false

Remarks

This property is used to determine whether or not the component is connected to the remote host.

This property is not available at design time.

Firewall Property (GRPC Component)

A set of properties related to firewall access.

Syntax

property Firewall: TipwFirewall read get_Firewall write set_Firewall;

Remarks

This is a Firewall-type property, which contains fields describing the firewall through which the component will attempt to connect.

Please refer to the Firewall type for a complete list of fields.

FollowRedirects Property (GRPC Component)

This property determines what happens when the server issues a redirect.

Syntax

property FollowRedirects: TipwTFollowRedirects read get_FollowRedirects write set_FollowRedirects;

TipwTFollowRedirects = (
  frNever,
  frAlways,
  frSameScheme
);

Default Value

frNever

Remarks

This property determines what happens when the server issues a redirect. Normally, the component returns an error if the server responds with an "Object Moved" message. If this property is set to frAlways (1), the new URL for the object is retrieved automatically every time.

If this property is set to frSameScheme (2), the new URL is retrieved automatically only if the URL scheme of the existing URL is the same.

If the new URL server is different from the existing one, Authorization is also reset to empty, unless this property is set to frAlways (1), in which case the same credentials are used to connect to the new server.

A Redirect event is fired for every URL the product is redirected to. In the case of automatic redirections, the Redirect event is a good place to set properties related to the new connection (e.g., new authentication parameters).

The default value is frNever (0). In this case, redirects are never followed, and the component raises an exception instead.

GRPCTimeout Property (GRPC Component)

The gRPC timeout.

Syntax

property GRPCTimeout: Integer read get_GRPCTimeout write set_GRPCTimeout;

Default Value

Remarks

This property specifies the value for the grpc-timeout header (in seconds). The default value is 0 (infinite), and the header is not sent in the request.

Idle Property (GRPC Component)

The current status of the component.

Syntax

property Idle: Boolean read get_Idle;

Default Value

true

Remarks

Idle will be False if the component is currently busy (communicating and/or waiting for an answer), and True at all other times.

This property is read-only.

MessageData Property (GRPC Component)

This property contains the message in a raw format.

Syntax

property MessageData: String read get_MessageData;
property MessageDataB: TBytes read get_MessageDataB;

Default Value

Remarks

This property contains the message in a raw format. After calling Post, this property is populated with the message response from the server. When writing the message, this property will be populated with the fields of the message in a raw format.

This property is read-only.

OtherHeaders Property (GRPC Component)

This property includes other headers as determined by the user (optional).

Syntax

property OtherHeaders: String read get_OtherHeaders write set_OtherHeaders;

Default Value

Remarks

This property can be set to a string of headers to be appended to the HTTP request headers.

The headers must follow the format "header: value" as described in the HTTP specifications. Header lines should be separated by CRLF ('#13#10') .

Use this property with caution. If this property contains invalid headers, HTTP requests may fail.

This property is useful for extending the functionality of the component beyond what is provided.

This property is not available at design time.

ParsedHeaders Property (GRPC Component)

This property includes a collection of headers returned from the last request.

Syntax

property ParsedHeaders: TipwHeaderList read get_ParsedHeaders;

Remarks

This property contains a collection of headers returned from the last request. Whenever headers are returned from the server, the headers are parsed into a collection of headers. Each Header in this collection contains information describing that header.

MaxHeaders can be used to control the maximum number of headers saved.

This property is read-only and not available at design time.

Please refer to the Header type for a complete list of fields.

Proxy Property (GRPC Component)

A set of properties related to proxy access.

Syntax

property Proxy: TipwProxy read get_Proxy write set_Proxy;

Remarks

This property contains fields describing the proxy through which the component will attempt to connect.

Please refer to the Proxy type for a complete list of fields.

SSLAcceptServerCertEncoded Property (GRPC Component)

This is the certificate (PEM/Base64 encoded).

Syntax

property SSLAcceptServerCertEncoded: String read get_SSLAcceptServerCertEncoded write set_SSLAcceptServerCertEncoded;
property SSLAcceptServerCertEncodedB: TBytes read get_SSLAcceptServerCertEncodedB write set_SSLAcceptServerCertEncodedB;

Default Value

Remarks

This is the certificate (PEM/Base64 encoded). This property is used to assign a specific certificate. The Store and Subject properties also may be used to specify a certificate.

When Encoded is set, a search is initiated in the current Store for the private key of the certificate. If the key is found, Subject is updated to reflect the full subject of the selected certificate; otherwise, Subject is set to an empty string.

This property is not available at design time.

SSLCertEncoded Property (GRPC Component)

This is the certificate (PEM/Base64 encoded).

Syntax

property SSLCertEncoded: String read get_SSLCertEncoded write set_SSLCertEncoded;
property SSLCertEncodedB: TBytes read get_SSLCertEncodedB write set_SSLCertEncodedB;

Default Value

Remarks

This is the certificate (PEM/Base64 encoded). This property is used to assign a specific certificate. The Store and Subject properties also may be used to specify a certificate.

This property is not available at design time.

SSLCertStore Property (GRPC Component)

This is the name of the certificate store for the client certificate.

Syntax

property SSLCertStore: String read get_SSLCertStore write set_SSLCertStore;
property SSLCertStoreB: TBytes read get_SSLCertStoreB write set_SSLCertStoreB;

Default Value

'MY'

Remarks

This is the name of the certificate store for the client certificate.

The StoreType property denotes the type of the certificate store specified by Store. If the store is password protected, specify the password in StorePassword.

Store is used in conjunction with the Subject property to specify client certificates. If Store has a value, and Subject or Encoded is set, a search for a certificate is initiated. Please see the Subject property for details.

Designations of certificate stores are platform dependent.

The following designations are the most common User and Machine certificate stores in Windows:


MY	A certificate store holding personal certificates with their associated private keys.
CA	Certifying authority certificates.
ROOT	Root certificates.

When the certificate store type is PFXFile, this property must be set to the name of the file. When the type is PFXBlob, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store).

SSLCertStorePassword Property (GRPC Component)

If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store.

Syntax

property SSLCertStorePassword: String read get_SSLCertStorePassword write set_SSLCertStorePassword;

Default Value

Remarks

If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store.

SSLCertStoreType Property (GRPC Component)

This is the type of certificate store for this certificate.

Syntax

property SSLCertStoreType: TipwCertStoreTypes read get_SSLCertStoreType write set_SSLCertStoreType;

TipwCertStoreTypes = (
  cstUser,
  cstMachine,
  cstPFXFile,
  cstPFXBlob,
  cstJKSFile,
  cstJKSBlob,
  cstPEMKeyFile,
  cstPEMKeyBlob,
  cstPublicKeyFile,
  cstPublicKeyBlob,
  cstSSHPublicKeyBlob,
  cstP7BFile,
  cstP7BBlob,
  cstSSHPublicKeyFile,
  cstPPKFile,
  cstPPKBlob,
  cstXMLFile,
  cstXMLBlob,
  cstJWKFile,
  cstJWKBlob,
  cstSecurityKey,
  cstBCFKSFile,
  cstBCFKSBlob,
  cstPKCS11,
  cstAuto
);

Default Value

cstUser

Remarks

This is the type of certificate store for this certificate.

The component supports both public and private keys in a variety of formats. When the cstAuto value is used, the component will automatically determine the type. This property can take one of the following values:


0 (cstUser - default)	For Windows, this specifies that the certificate store is a certificate store owned by the current user. Note: This store type is not available in Java.
1 (cstMachine)	For Windows, this specifies that the certificate store is a machine store. Note: This store type is not available in Java.
2 (cstPFXFile)	The certificate store is the name of a PFX (PKCS#12) file containing certificates.
3 (cstPFXBlob)	The certificate store is a string (binary or Base64-encoded) representing a certificate store in PFX (PKCS#12) format.
4 (cstJKSFile)	The certificate store is the name of a Java Key Store (JKS) file containing certificates. Note: This store type is only available in Java.
5 (cstJKSBlob)	The certificate store is a string (binary or Base64-encoded) representing a certificate store in Java Key Store (JKS) format. Note: this store type is only available in Java.
6 (cstPEMKeyFile)	The certificate store is the name of a PEM-encoded file that contains a private key and an optional certificate.
7 (cstPEMKeyBlob)	The certificate store is a string (binary or Base64-encoded) that contains a private key and an optional certificate.
8 (cstPublicKeyFile)	The certificate store is the name of a file that contains a PEM- or DER-encoded public key certificate.
9 (cstPublicKeyBlob)	The certificate store is a string (binary or Base64-encoded) that contains a PEM- or DER-encoded public key certificate.
10 (cstSSHPublicKeyBlob)	The certificate store is a string (binary or Base64-encoded) that contains an SSH-style public key.
11 (cstP7BFile)	The certificate store is the name of a PKCS#7 file containing certificates.
12 (cstP7BBlob)	The certificate store is a string (binary) representing a certificate store in PKCS#7 format.
13 (cstSSHPublicKeyFile)	The certificate store is the name of a file that contains an SSH-style public key.
14 (cstPPKFile)	The certificate store is the name of a file that contains a PPK (PuTTY Private Key).
15 (cstPPKBlob)	The certificate store is a string (binary) that contains a PPK (PuTTY Private Key).
16 (cstXMLFile)	The certificate store is the name of a file that contains a certificate in XML format.
17 (cstXMLBlob)	The certificate store is a string that contains a certificate in XML format.
18 (cstJWKFile)	The certificate store is the name of a file that contains a JWK (JSON Web Key).
19 (cstJWKBlob)	The certificate store is a string that contains a JWK (JSON Web Key).
21 (cstBCFKSFile)	The certificate store is the name of a file that contains a BCFKS (Bouncy Castle FIPS Key Store). Note: This store type is only available in Java and .NET.
22 (cstBCFKSBlob)	The certificate store is a string (binary or Base64-encoded) representing a certificate store in BCFKS (Bouncy Castle FIPS Key Store) format. Note: This store type is only available in Java and .NET.
23 (cstPKCS11)	The certificate is present on a physical security key accessible via a PKCS#11 interface. To use a security key, the necessary data must first be collected using the CertMgr component. The ListStoreCertificates method may be called after setting CertStoreType to `cstPKCS11`, CertStorePassword to the PIN, and CertStore to the full path of the PKCS#11 DLL. The certificate information returned in the CertList event's `CertEncoded` parameter may be saved for later use. When using a certificate, pass the previously saved security key information as the Store and set StorePassword to the PIN. Code Example. SSH Authentication with Security Key: `certmgr.CertStoreType = CertStoreTypes.cstPKCS11; certmgr.OnCertList += (s, e) => { secKeyBlob = e.CertEncoded; }; certmgr.CertStore = @"C:\Program Files\OpenSC Project\OpenSC\pkcs11\opensc-pkcs11.dll"; certmgr.CertStorePassword = "123456"; //PIN certmgr.ListStoreCertificates(); sftp.SSHCert = new Certificate(CertStoreTypes.cstPKCS11, secKeyBlob, "123456", "*"); sftp.SSHUser = "test"; sftp.SSHLogon("myhost", 22);`
99 (cstAuto)	The store type is automatically detected from the input data. This setting may be used with both public and private keys and can detect any of the supported formats automatically.

SSLCertSubject Property (GRPC Component)

This is the subject of the certificate used for client authentication.

Syntax

property SSLCertSubject: String read get_SSLCertSubject write set_SSLCertSubject;

Default Value

Remarks

This is the subject of the certificate used for client authentication.

This property must be set after all other certificate properties are set. When this property is set, a search is performed in the current certificate store to locate a certificate with a matching subject.

If a matching certificate is found, the property is set to the full subject of the matching certificate.

If an exact match is not found, the store is searched for subjects containing the value of the property.

If a match is still not found, the property is set to an empty string, and no certificate is selected.

The special value "*" picks a random certificate in the certificate store.

The certificate subject is a comma-separated list of distinguished name fields and values. For instance, "CN=www.server.com, OU=test, C=US, E=support@nsoftware.com". Common fields and their meanings are as follows:


Field	Meaning
CN	Common Name. This is commonly a hostname like www.server.com.
O	Organization
OU	Organizational Unit
L	Locality
S	State
C	Country
E	Email Address

If a field value contains a comma, it must be quoted.

SSLProvider Property (GRPC Component)

This specifies the SSL/TLS implementation to use.

Syntax

property SSLProvider: TipwTSSLProviders read get_SSLProvider write set_SSLProvider;

TipwTSSLProviders = (
  sslpAutomatic,
  sslpPlatform,
  sslpInternal
);

Default Value

sslpAutomatic

Remarks

This property specifies the SSL/TLS implementation to use. In most cases the default value of 0 (Automatic) is recommended and should not be changed. When set to 0 (Automatic) the component will select whether to use the platform implementation or the internal implementation depending on the operating system as well as the TLS version being used.

Possible values are:


0 (sslpAutomatic - default)	Automatically selects the appropriate implementation.
1 (sslpPlatform)	Uses the platform/system implementation.
2 (sslpInternal)	Uses the internal implementation.

Additional Notes

In most cases using the default value (Automatic) is recommended. The component will select a provider depending on the current platform.

When Automatic is selected, on Windows the component will use the platform implementation. On Linux/macOS the component will use the internal implementation. When TLS 1.3 is enabled via SSLEnabledProtocols the internal implementation is used on all platforms.

SSLServerCertEncoded Property (GRPC Component)

This is the certificate (PEM/Base64 encoded).

Syntax

property SSLServerCertEncoded: String read get_SSLServerCertEncoded;
property SSLServerCertEncodedB: TBytes read get_SSLServerCertEncodedB;

Default Value

Remarks

This is the certificate (PEM/Base64 encoded). This property is used to assign a specific certificate. The Store and Subject properties also may be used to specify a certificate.

This property is read-only and not available at design time.

Status Property (GRPC Component)

This property includes the gRPC status code.

Syntax

property Status: String read get_Status;

Default Value

Remarks

This property contains the gRPC status code returned by the server when the request is sent through Post.

This property is read-only.

StatusDescription Property (GRPC Component)

This property includes a unicode string description of an error, which is physically encoded as UTF-8 followed by percent-encoding.

Syntax

property StatusDescription: String read get_StatusDescription;

Default Value

Remarks

This property contains a unicode string description of any existing error, which is physically encoded as UTF-8 followed by percent-encoding. If there are no errors, the value of the property will be an empty string.

This property is read-only.

StatusLine Property (GRPC Component)

This property is the first line of the last server response.

Syntax

property StatusLine: String read get_StatusLine;

Default Value

Remarks

This property contains the first line of the last server response. This value can be used for diagnostic purposes. If an HTTP error is returned when calling a method of the component, the error string is the same as the StatusLine property.

The HTTP protocol specifies the structure of the StatusLine as follows: [HTTP version] [Result Code] [Description].

This property is read-only and not available at design time.

Timeout Property (GRPC Component)

A timeout for the component.

Syntax

property Timeout: Integer read get_Timeout write set_Timeout;

Default Value

Remarks

If the Timeout property is set to 0, all operations will run uninterrupted until successful completion or an error condition is encountered.

If Timeout is set to a positive value, the component will wait for the operation to complete before returning control.

The component will use DoEvents to enter an efficient wait loop during any potential waiting period, making sure that all system events are processed immediately as they arrive. This ensures that the host application does not "freeze" and remains responsive.

If Timeout expires, and the operation is not yet complete, the component raises an exception.

Please note that by default, all timeouts are inactivity timeouts, i.e. the timeout period is extended by Timeout seconds when any amount of data is successfully sent or received.

The default value for the Timeout property is 60 seconds.

TransferredData Property (GRPC Component)

This property includes the contents of the last response from the server.

Syntax

property TransferredData: String read get_TransferredData;
property TransferredDataB: TBytes read get_TransferredDataB;

Default Value

Remarks

This property contains the contents of the last response from the server. The data also can be received in the Transfer event.

TransferredDataLimit controls the maximum amount of data accumulated in TransferredData (by default, there is no limit).

This property is read-only and not available at design time.

TransferredDataLimit Property (GRPC Component)

This property specifies the the maximum amount of data to be transferred.

Syntax

property TransferredDataLimit: Int64 read get_TransferredDataLimit write set_TransferredDataLimit;

Default Value

Remarks

This property contains the maximum amount of data to be transferred. The default value is 0, which will not impose any limits on the amount of data accumulated in the TransferredData property.

TransferredHeaders Property (GRPC Component)

This property includes the complete set of headers as received from the server.

Syntax

property TransferredHeaders: String read get_TransferredHeaders;

Default Value

Remarks

This property returns the complete set of raw headers as received from the server.

This property is read-only and not available at design time.

URL Property (GRPC Component)

This property includes the URL to post.

Syntax

property URL: String read get_URL write set_URL;

Default Value

Remarks

This property contains the URL of the document that is used during the Post operation.

XCount Property (GRPC Component)

This property includes the number of packed fields or instances of the field specified by XPath .

Syntax

property XCount: Integer read get_XCount;

Default Value

Remarks

The XCount property can be used to obtain the number of values in a packed repeated field at the specified XPath. When XPath specifies a field that is not a packed repeated field, XCount will return the number of instances of the specified field. Even if the field is not a repeated field, it may still have multiple instances within the message, and XCount will reflect this number of instances.

Example. Using XCount and XPath to iterate through all values within a packed repeated field: gRPC.XPath = "/10#v"; int count = gRPC.XCount; for(int i=0;i<count;i++) { gRPC.XPath = "/10#v[ " + i.ToString() + "]"; Console.WriteLine(Int32.Parse(gRPC.ReadInt32())); }

This property is read-only.

XPath Property (GRPC Component)

This property provides a way to point to a specific field in the message.

Syntax

property XPath: String read get_XPath write set_XPath;

Default Value

The following are possible values for a field accessor:


field_number	The integer number of the field: for instance, `/2` or `/11`
field_number[i]	The i-th occurrence of the field specified by the field_number: for instance, `/2[1]` or `/11[3]`
[index]	The field at the position specified by index: for instance, `/[2]` would select the second field, regardless of the field number
.	The current location
..	The parent of the current location

Nested Messages

Packed Repeated Fields


/10#v	Select field number 10, which is a packed repeated field of type variant
/11#i	Select field number 11, which is a packed repeated field of type fixed32
/12#l	Select field number 12, which is a packed repeated field of type fixed64
/10#v[2]	Select the 2nd value of field number 10, which is a packed repeated field of type variant
/11#v[2]	Select the 2nd value of field number 11, which is a packed repeated field of type fixed32
/12#v[2]	Select the 2nd value of field number 12, which is a packed repeated field of type fixed64

BeginReadMessage Method (GRPC Component)

This method begins reading a message.

Syntax

procedure BeginReadMessage();

Remarks

This method begins reading a new message and always must be called before starting to read a new message or a subtype field.

ReadString
ReadInt32
ReadInt64
ReadFloat
ReadFixed32
ReadFixed64
ReadDouble
ReadBytes
ReadBool

Example 2. Read message example, including a packed repeated field:

As a last step, call EndReadMessage.

BeginReadPacked Method (GRPC Component)

This method begins reading a repeated packed field.

Syntax

function BeginReadPacked(WireType: Integer): Integer;

Remarks

This method begins reading a packed repeated field and always must be called before starting to read a packed repeated field. The wiretype of the elements must be specified in the WireType parameter. This method returns the number of elements of the packed repeated field.

Possible values of the WireType parameter are:


ID (Name)	Used For
0 (VARINT)	int32, int64, uint64, sint32, sint64, bool, enum
1 (I64)	fixed64, sfixed64, double
2 (LEN)	string, bytes, embedded messages, packed repeated fields
3 (SGROUP)	group start (deprecated)
4 (EGROUP)	group end (deprecated)
5 (I32)	fixed32, sfixed32, float

ReadString
ReadInt32
ReadInt64
ReadFloat
ReadFixed32
ReadFixed64
ReadDouble
ReadBytes
ReadBool

Example 2. Read message example, including a packed repeated field:

As a last step, call EndReadMessage.

BeginWriteMessage Method (GRPC Component)

This method begins writing a new message.

Syntax

procedure BeginWriteMessage();

Remarks

This method begins writing a new message and always must be always called before starting to write a new message or a subtype field.

To write a message, first call BeginWriteMessage. Next, call WriteFieldNumber and pass the field number to write. Then call the appropriate method from the following list to write the field value.

WriteString
WriteInt32
WriteInt64
WriteFloat
WriteFixed32
WriteFixed64
WriteDouble
WriteBytes
WriteBool

As a last step, call EndWriteMessage.

BeginWritePacked Method (GRPC Component)

This method begins writing a new packed repeated field.

Syntax

procedure BeginWritePacked();

Remarks

This method begins writing a new packed repeated field and always must be called before starting to write a new packed repeated field. Note that since only repeated fields of primitive numeric types can be packed, this method cannot be used to write repeated strings or other non-primitive repeated fields.

To write a message, first call BeginWriteMessage. Next, call WriteFieldNumber and pass the field number to write. Then call the appropriate method from the following list to write the field value.

WriteString
WriteInt32
WriteInt64
WriteFloat
WriteFixed32
WriteFixed64
WriteDouble
WriteBytes
WriteBool

As a last step, call EndWriteMessage.

CalcAuthorization Method (GRPC Component)

This method calculates the Authorization header based on provided credentials.

Syntax

procedure CalcAuthorization();

Remarks

This method calculates the Authorization value using the values provided in AuthScheme, User, and Password.

In most cases, this method does not need to be called. The component will automatically calculate any required authorization values when a method is called, such as Get or Post.

This method may be useful in cases in which the Authorization value needs to be calculated before sending a request.

Config Method (GRPC Component)

Sets or retrieves a configuration setting.

Syntax

function Config(ConfigurationString: String): String;

Remarks

Config is a generic method available in every component. It is used to set and retrieve configuration settings for the component.

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the component, access to these internal properties is provided through the Config method.

To set a configuration setting named PROPERTY, you must call Config("PROPERTY=VALUE"), where VALUE is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter).

To read (query) the value of a configuration setting, you must call Config("PROPERTY"). The value will be returned as a string.

DoEvents Method (GRPC Component)

Processes events from the internal message queue.

Syntax

procedure DoEvents();

Remarks

When DoEvents is called, the component processes any available events. If no events are available, it waits for a preset period of time, and then returns.

EndReadMessage Method (GRPC Component)

This method ends reading a message.

Syntax

procedure EndReadMessage();

Remarks

This method completes reading a message or a subtype field. The EndReadMessage method must be called after the message fields are specified. This method has a matching pair with the BeginReadMessage method. Each call to BeginReadMessage must have a matching call to EndReadMessage.

ReadString
ReadInt32
ReadInt64
ReadFloat
ReadFixed32
ReadFixed64
ReadDouble
ReadBytes
ReadBool

Example 2. Read message example, including a packed repeated field:

As a last step, call EndReadMessage.

EndReadPacked Method (GRPC Component)

This method ends reading a packed repeated field.

Syntax

procedure EndReadPacked();

Remarks

This method tells the component to end a packed repeated field reading operation. The EndReadPacked method must be called after the repeated values are specified. This method has a matching pair with the BeginReadPacked method. Each call to BeginReadPacked must have a matching call to EndReadPacked.

ReadString
ReadInt32
ReadInt64
ReadFloat
ReadFixed32
ReadFixed64
ReadDouble
ReadBytes
ReadBool

Example 2. Read message example, including a packed repeated field:

As a last step, call EndReadMessage.

EndWriteMessage Method (GRPC Component)

This method ends writing a message.

Syntax

procedure EndWriteMessage();

Remarks

This method completes writing a message or a subtype field. The EndWriteMessage method must be called after the message fields are specified. This method has a matching pair with the BeginWriteMessage method. Each call to BeginWriteMessage must have a matching call to EndWriteMessage.

To write a message, first call BeginWriteMessage. Next, call WriteFieldNumber and pass the field number to write. Then call the appropriate method from the following list to write the field value.

WriteString
WriteInt32
WriteInt64
WriteFloat
WriteFixed32
WriteFixed64
WriteDouble
WriteBytes
WriteBool

As a last step, call EndWriteMessage.

EndWritePacked Method (GRPC Component)

This method ends writing a packed repeated field.

Syntax

procedure EndWritePacked();

Remarks

This method tells the component to end a packed repeated field writing operation. The EndWritePacked method must be called after the repeated values are specified. This method has a matching pair with the BeginWritePacked method. Each call to BeginWritePacked must have a matching call to EndWritePacked.

To write a message, first call BeginWriteMessage. Next, call WriteFieldNumber and pass the field number to write. Then call the appropriate method from the following list to write the field value.

WriteString
WriteInt32
WriteInt64
WriteFloat
WriteFixed32
WriteFixed64
WriteDouble
WriteBytes
WriteBool

As a last step, call EndWriteMessage.

HasXPath Method (GRPC Component)

This method determines whether a specific element exists in the document.

Syntax

function HasXPath(XPath: String): Boolean;

Remarks

This method determines whether a particular XPath exists within the document. This may be used to check whether or not a path exists before setting it through XPath.

This method returns True if the xpath exists, and False if not.

See XPath for details on the XPath syntax.

Interrupt Method (GRPC Component)

Interrupt the current method.

Syntax

procedure Interrupt();

Remarks

If there is no method in progress, Interrupt simply returns, doing nothing.

Post Method (GRPC Component)

This method posts a message to the HTTP server using the HTTP POST method.

Syntax

procedure Post(URL: String);

Remarks

This method posts data to the HTTP server using the HTTP POST method. Posted message data are constructed using the Write* methods. The server response text is received through the Transfer event and will be available in the MessageData property. The message response can be read with the component by using the MessageIn event. See the introduction page for details.

Example. Performing a post:

grpc.BeginWriteMessage(); grpc.WriteFieldNumber(1); grpc.WriteString("test"); grpc.WriteFieldNumber(2); grpc.WriteInt32(2); grpc.EndWriteMessage(); grpc.Post("http://grpc.myserver.net");

ReadBool Method (GRPC Component)

This method reads the Boolean value from the current field number and returns it.

Syntax

function ReadBool(): Boolean;

Remarks

This method reads the Boolean value of the current field number and returns it. The current field number is specified by the component when calling ReadFieldNumber.

The ReadFieldNumber method must be called before calling ReadBool.

ReadBytes Method (GRPC Component)

This method reads the value of type byte from the current field number and returns it.

Syntax

function ReadBytes(): TBytes;

Remarks

This method reads the value of type byte from the current field number and returns it. The current field number is specified by the component when calling ReadFieldNumber.

The ReadFieldNumber method must be called before calling ReadBytes.

ReadDouble Method (GRPC Component)

This method reads the value of type double from the current field number and returns it.

Syntax

function ReadDouble(): String;

Remarks

This method reads the value of type double from the current field number and returns it. The current field number is specified by the component when calling ReadFieldNumber.

The ReadFieldNumber method must be called before calling ReadDouble.

ReadFieldNumber Method (GRPC Component)

This method reads the next field number and returns it.

Syntax

function ReadFieldNumber(): Integer;

Remarks

This method reads the next field number and returns it. The ReadFieldNumber method must be called before reading the value of the field.

ReadFixed32 Method (GRPC Component)

This method reads the fixed int32 value from the current field number and returns it.

Syntax

function ReadFixed32(): Integer;

Remarks

This method reads the fixed int32 value from the current field number and returns it. The current field number is specified by the component when calling ReadFieldNumber.

The ReadFieldNumber method must be called before calling ReadFixed32.

ReadFixed64 Method (GRPC Component)

This method reads the fixed int64 value from the current field number and returns it.

Syntax

function ReadFixed64(): Int64;

Remarks

This method reads the fixed int64 value from the current field number and returns it. The current field number is specified by the component when calling ReadFieldNumber.

The ReadFieldNumber method must be called before calling ReadFixed64.

ReadFloat Method (GRPC Component)

This method reads the float value from the current field number and returns it.

Syntax

function ReadFloat(): String;

Remarks

This method reads the float value from the current field number and returns it. The current field number is specified by the component when calling ReadFieldNumber.

The ReadFieldNumber method must be called before calling ReadFloat.

ReadInt32 Method (GRPC Component)

This method reads the int32 value from the current field number and returns it.

Syntax

function ReadInt32(): Integer;

Remarks

This method reads the int32 value from the current field number and returns it. The current field number is specified by the component when calling ReadFieldNumber.

The ReadFieldNumber method must be called before calling ReadInt32.

ReadInt64 Method (GRPC Component)

This method reads the int64 value from the current field number and returns it.

Syntax

function ReadInt64(): Int64;

Remarks

This method reads the int64 value from the current field number and returns it. The current field number is specified by the component when calling ReadFieldNumber.

The ReadFieldNumber method must be called before calling ReadInt64.

ReadSint32 Method (GRPC Component)

This method reads the sint32 value from the current field number and returns it.

Syntax

function ReadSint32(): Integer;

Remarks

This method reads the sint32 value from the current field number and returns it. The current field number is specified by the component when calling ReadFieldNumber.

The ReadFieldNumber method must be called before calling ReadInt32.

ReadSint64 Method (GRPC Component)

This method reads the sint64 value from the current field number and returns it.

Syntax

function ReadSint64(): Int64;

Remarks

This method reads the sint64 value from the current field number and returns it. The current field number is specified by the component when calling ReadFieldNumber.

The ReadFieldNumber method must be called before calling ReadInt32.

ReadSkip Method (GRPC Component)

This method skips reading a value from the current field.

Syntax

procedure ReadSkip();

Remarks

This method skips reading a value from the current field specified by ReadFieldNumber. ReadSkip might be useful in cases in which you do not want to read the value of a particular field.

Example. Using ReadSkip to skip reading the field with the field number 2: // Begins reading a message grpc.BeginReadMessage(); // Loop to get the field number // After all fields are traversed ReadFieldNumber will return 0 while ((num = grpc.ReadFieldNumber()) > 0) { switch (num) { case 1: Name = grpc.ReadString(); break; case 2: // ReadSkip is used to skip reading value with field number 2 grpc.ReadSkip(); break; case 3: Num64 = grpc.ReadInt64(); break; } // Ends reading a message grpc.EndReadMessage();

ReadString Method (GRPC Component)

This method reads the string value from the current field number and returns it.

Syntax

function ReadString(): String;

Remarks

This method reads the string value from the current field number and returns it. The current field number is specified by the component when calling ReadFieldNumber.

The ReadFieldNumber method must be called before calling ReadString.

Reset Method (GRPC Component)

Reset the component.

Syntax

procedure Reset();

Remarks

This method will reset the component's properties to their default values.

TryXPath Method (GRPC Component)

This method navigates to the specified XPath if it exists.

Syntax

function TryXPath(xpath: String): Boolean;

Remarks

This method will attempt to navigate to the specified XPath parameter if it exists within the document.

If the XPath exists, the XPath property will be updated, and the method will return True.

If the XPath does not exist, the XPath property will not be updated, and the method will return False.

WriteBool Method (GRPC Component)

This method writes a Boolean value to the current field number.

Syntax

procedure WriteBool(value: Boolean);

Remarks

This method is used to write a Boolean value to the current field number. The current field number must be specified with the WriteFieldNumber method before calling this method.

The Boolean value must be passed to the value parameter.

WriteBytes Method (GRPC Component)

This method writes a value of type byte to the current field number.

Syntax

procedure WriteBytes(value: TBytes);

Remarks

This method is used to write a value of type byte to the current field number. The current field number must be specified with the WriteFieldNumber method before calling this method.

The value of type byte must be passed to the value parameter.

WriteDouble Method (GRPC Component)

This method writes a value of type double to the current field number.

Syntax

procedure WriteDouble(value: String);

Remarks

This method is used to write a value of type double to the current field number. The current field number must be specified with the WriteFieldNumber method before calling this method.

The value of type double must be passed to the value parameter.

WriteFieldNumber Method (GRPC Component)

This method specifies the field number to write.

Syntax

procedure WriteFieldNumber(value: Integer);

Remarks

This method tells the component which message field number to write. The field number must be passed to the value parameter.

This method must be called before writing the field value.

WriteFixed32 Method (GRPC Component)

This method writes a fixed32 value to the current field number.

Syntax

procedure WriteFixed32(value: Integer);

Remarks

This method is used to write a fixed32 value to the current field number. The current field number must be specified with the WriteFieldNumber method before calling this method.

The fixed32 value must be passed to the value parameter.

WriteFixed64 Method (GRPC Component)

This method writes a fixed64 value to the current field number.

Syntax

procedure WriteFixed64(value: Int64);

Remarks

This method is used to write a fixed64 value to the current field number. The current field number must be specified with the WriteFieldNumber method before calling this method.

The fixed64 value must be passed to the value parameter.

WriteFloat Method (GRPC Component)

This method writes a float value to the current field number specified.

Syntax

procedure WriteFloat(value: String);

Remarks

This method is used to write a float value to the current field number. The current field number must be specified with the WriteFieldNumber method before calling this method.

The float value must be passed to the value parameter.

WriteInt32 Method (GRPC Component)

This method writes an int32 value to the current field number.

Syntax

procedure WriteInt32(value: Integer);

Remarks

This method is used to write an int32 value to the current field number. The current field number must be specified with the WriteFieldNumber method before calling this method.

The int32 value must be passed to the value parameter.

WriteInt64 Method (GRPC Component)

This method writes an int64 value to the current field number.

Syntax

procedure WriteInt64(value: Int64);

Remarks

This method is used to write an int64 value to the current field number. The current field number must be specified with the WriteFieldNumber method before calling this method.

The int64 value must be passed to the value parameter.

WriteSint32 Method (GRPC Component)

This method writes an sint32 value to the current field number.

Syntax

procedure WriteSint32(value: Integer);

Remarks

This method is used to write an sint32 value to the current field number. The current field number must be specified with the WriteFieldNumber method before calling this method.

The sint32 value must be passed to the value parameter.

WriteSint64 Method (GRPC Component)

This method writes an sint64 value to the current field number.

Syntax

procedure WriteSint64(value: Int64);

Remarks

This method is used to write an sint64 value to the current field number. The current field number must be specified with the WriteFieldNumber method before calling this method.

The sint364 value must be passed to the value parameter.

WriteString Method (GRPC Component)

This method writes a string value to the current field number.

Syntax

procedure WriteString(value: String);

Remarks

This method is used to write a string value to the current field number. The current field number must be specified with the WriteFieldNumber method before calling this method.

The string value must be passed to the value parameter.

Connected Event (GRPC Component)

This event is fired immediately after a connection completes (or fails).

Syntax

type TConnectedEvent = procedure (
  Sender: TObject;
  StatusCode: Integer;
  const Description: String
) of Object;

property OnConnected: TConnectedEvent read FOnConnected write FOnConnected;

Remarks

If the connection is made normally, StatusCode is 0 and Description is 'OK'.

If the connection fails, StatusCode has the error code returned by the Transmission Control Protocol (TCP)/IP stack. Description contains a description of this code. The value of StatusCode is equal to the value of the error.

Please refer to the Error Codes section for more information.

ConnectionStatus Event (GRPC Component)

This event is fired to indicate changes in the connection state.

Syntax

type TConnectionStatusEvent = procedure (
  Sender: TObject;
  const ConnectionEvent: String;
  StatusCode: Integer;
  const Description: String
) of Object;

property OnConnectionStatus: TConnectionStatusEvent read FOnConnectionStatus write FOnConnectionStatus;

Remarks

The ConnectionStatus event is fired when the connection state changes: for example, completion of a firewall or proxy connection or completion of a security handshake.

The ConnectionEvent parameter indicates the type of connection event. Values may include the following:


	Firewall connection complete.
	Secure Sockets Layer (SSL) or S/Shell handshake complete (where applicable).
	Remote host connection complete.
	Remote host disconnected.
	SSL or S/Shell connection broken.
	Firewall host disconnected.

StatusCode has the error code returned by the Transmission Control Protocol (TCP)/IP stack. Description contains a description of this code. The value of StatusCode is equal to the value of the error.

Disconnected Event (GRPC Component)

This event is fired when a connection is closed.

Syntax

type TDisconnectedEvent = procedure (
  Sender: TObject;
  StatusCode: Integer;
  const Description: String
) of Object;

property OnDisconnected: TDisconnectedEvent read FOnDisconnected write FOnDisconnected;

Remarks

If the connection is broken normally, StatusCode is 0 and Description is 'OK'.

If the connection is broken for any other reason, StatusCode has the error code returned by the Transmission Control Protocol (TCP/IP) subsystem. Description contains a description of this code. The value of StatusCode is equal to the value of the TCP/IP error.

Please refer to the Error Codes section for more information.

EndTransfer Event (GRPC Component)

This event is fired when a document finishes transferring.

Syntax

type TEndTransferEvent = procedure (
  Sender: TObject;
  Direction: Integer
) of Object;

property OnEndTransfer: TEndTransferEvent read FOnEndTransfer write FOnEndTransfer;

Remarks

The EndTransfer event is fired first when the client finishes sending data to the server (in a POST or PUT request) and then when the document text finishes transferring from the server to the local host.

The Direction parameter shows whether the client (0) or the server (1) is sending the data.

Error Event (GRPC Component)

Fired when information is available about errors during data delivery.

Syntax

type TErrorEvent = procedure (
  Sender: TObject;
  ErrorCode: Integer;
  const Description: String
) of Object;

property OnError: TErrorEvent read FOnError write FOnError;

Remarks

The Error event is fired in case of exceptional conditions during message processing. Normally the component raises an exception.

The ErrorCode parameter contains an error code, and the Description parameter contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the Error Codes section.

Log Event (GRPC Component)

This event fires once for each log message.

Syntax

type TLogEvent = procedure (
  Sender: TObject;
  LogLevel: Integer;
  const Message: String;
  const LogType: String
) of Object;

property OnLog: TLogEvent read FOnLog write FOnLog;

Remarks

This event fires once for each log message generated by the component. The verbosity is controlled by the LogLevel setting.

LogLevel indicates the level of message. Possible values are as follows:


0 (None)	No events are logged.
1 (Info - default)	Informational events are logged.
2 (Verbose)	Detailed data are logged.
3 (Debug)	Debug data are logged.

The value 1 (Info) logs basic information, including the URL, HTTP version, and status details.

The value 2 (Verbose) logs additional information about the request and response.

The value 3 (Debug) logs the headers and body for both the request and response, as well as additional debug information (if any).

Message is the log entry.

LogType identifies the type of log entry. Possible values are as follows:

"Info"
"RequestHeaders"
"ResponseHeaders"
"RequestBody"
"ResponseBody"
"ProxyRequest"
"ProxyResponse"
"FirewallRequest"
"FirewallResponse"

MessageIn Event (GRPC Component)

This event fires when a message response is sent by the server.

Syntax

type TMessageInEvent = procedure (
  Sender: TObject;
  Compressed: Boolean;
  MessageLength: Integer
) of Object;

property OnMessageIn: TMessageInEvent read FOnMessageIn write FOnMessageIn;

Remarks

This event fires for every message response sent by the server after calling Post. Every time this event fires, the MessageData property is populated with the raw data of the response.

Compressed is a Boolean indicating whether or not the message is in a compressed state.

The length of the message is shown by MessageLength.

Redirect Event (GRPC Component)

This event is fired when a redirection is received from the server.

Syntax

type TRedirectEvent = procedure (
  Sender: TObject;
  const Location: String;
  var Accept: Boolean
) of Object;

property OnRedirect: TRedirectEvent read FOnRedirect write FOnRedirect;

Remarks

This event is fired in cases in which the client can decide whether or not to continue with the redirection process. The Accept parameter is always True by default, but if you do not want to follow the redirection, Accept may be set to False, in which case the component raises an exception. Location is the location to which the client is being redirected. Further control over redirection is provided in the FollowRedirects property.

SSLServerAuthentication Event (GRPC Component)

Fired after the server presents its certificate to the client.

Syntax

type TSSLServerAuthenticationEvent = procedure (
  Sender: TObject;
  CertEncoded: String;
  CertEncodedB: TBytes;
  const CertSubject: String;
  const CertIssuer: String;
  const Status: String;
  var Accept: Boolean
) of Object;

property OnSSLServerAuthentication: TSSLServerAuthenticationEvent read FOnSSLServerAuthentication write FOnSSLServerAuthentication;

Remarks

During this event, the client can decide whether or not to continue with the connection process. The Accept parameter is a recommendation on whether to continue or close the connection. This is just a suggestion: application software must use its own logic to determine whether or not to continue.

When Accept is False, Status shows why the verification failed (otherwise, Status contains the string OK). If it is decided to continue, you can override and accept the certificate by setting the Accept parameter to True.

SSLStatus Event (GRPC Component)

Fired when secure connection progress messages are available.

Syntax

type TSSLStatusEvent = procedure (
  Sender: TObject;
  const Message: String
) of Object;

property OnSSLStatus: TSSLStatusEvent read FOnSSLStatus write FOnSSLStatus;

Remarks

The event is fired for informational and logging purposes only. This event tracks the progress of the connection.

StartTransfer Event (GRPC Component)

This event is fired when a document starts transferring (after the headers).

Syntax

type TStartTransferEvent = procedure (
  Sender: TObject;
  Direction: Integer
) of Object;

property OnStartTransfer: TStartTransferEvent read FOnStartTransfer write FOnStartTransfer;

Remarks

The StartTransfer event is fired first when the client starts sending data to the server (in a POST or PUT request) and then when the document text starts transferring from the server to the local host.

The Direction parameter shows whether the client (0) or the server (1) is sending the data.

Status Event (GRPC Component)

This event is fired when the HTTP status line is received from the server.

Syntax

type TStatusEvent = procedure (
  Sender: TObject;
  const HTTPVersion: String;
  StatusCode: Integer;
  const Description: String
) of Object;

property OnStatus: TStatusEvent read FOnStatus write FOnStatus;

Remarks

HTTPVersion is a string containing the HTTP version string as returned from the server (e.g., "1.1").

StatusCode contains the HTTP status code (e.g., 200), and Description the associated message returned by the server (e.g., "OK").

Transfer Event (GRPC Component)

This event is fired while a document transfers (delivers document).

Syntax

type TTransferEvent = procedure (
  Sender: TObject;
  Direction: Integer;
  BytesTransferred: Int64;
  PercentDone: Integer;
  Text: String;
  TextB: TBytes
) of Object;

property OnTransfer: TTransferEvent read FOnTransfer write FOnTransfer;

Remarks

The Text parameter contains the portion of the document text being received. It is empty if data are being posted to the server.

The BytesTransferred parameter contains the number of bytes transferred in this Direction since the beginning of the document text (excluding HTTP response headers).

The Direction parameter shows whether the client (0) or the server (1) is sending the data.

The PercentDone parameter shows the progress of the transfer in the corresponding direction. If PercentDone can not be calculated the value will be -1.

Note: Events are not re-entrant. Performing time-consuming operations within this event will prevent it from firing again in a timely manner and may affect overall performance.

Firewall Type

The firewall the component will connect through.

Remarks

When connecting through a firewall, this type is used to specify different properties of the firewall, such as the firewall Host and the FirewallType.

Fields

AutoDetect
Boolean
Default Value: False

This property tells the component whether or not to automatically detect and use firewall system settings, if available.

FirewallType
TipwFirewallTypes
Default Value: 0

This property determines the type of firewall to connect through. The applicable values are as follows:


fwNone (0)	No firewall (default setting).
fwTunnel (1)	Connect through a tunneling proxy. Port is set to 80.
fwSOCKS4 (2)	Connect through a SOCKS4 Proxy. Port is set to 1080.
fwSOCKS5 (3)	Connect through a SOCKS5 Proxy. Port is set to 1080.
fwSOCKS4A (10)	Connect through a SOCKS4A Proxy. Port is set to 1080.

Host
String
Default Value: ""

This property contains the name or IP address of firewall (optional). If a Host is given, the requested connections will be authenticated through the specified firewall when connecting.

If this property is set to a Domain Name, a DNS request is initiated. Upon successful termination of the request, this property is set to the corresponding address. If the search is not successful, the component raises an exception.

Password
String
Default Value: ""

This property contains a password if authentication is to be used when connecting through the firewall. If Host is specified, the User and Password properties are used to connect and authenticate to the given firewall. If the authentication fails, the component raises an exception.

Port
Integer
Default Value: 0

This property contains the transmission control protocol (TCP) port for the firewall Host. See the description of the Host property for details.

Note: This property is set automatically when FirewallType is set to a valid value. See the description of the FirewallType property for details.

User
String
Default Value: ""

This property contains a user name if authentication is to be used connecting through a firewall. If the Host is specified, this property and Password properties are used to connect and authenticate to the given Firewall. If the authentication fails, the component raises an exception.

Constructors

constructor Create();

Header Type

This is an HTTP header as it is received from the server.

Remarks

When a header is received through a Header event, it is parsed into a Header type. This type contains a Field, and its corresponding Value.

Fields

Field
String
Default Value: ""

This property contains the name of the HTTP Header (this is the same case as it is delivered).

Value
String
Default Value: ""

This property contains the Header contents.

Constructors

constructor Create();

constructor Create(valField: String; valValue: String);

Proxy Type

The proxy the component will connect to.

Remarks

When connecting through a proxy, this type is used to specify different properties of the proxy, such as the Server and the AuthScheme.

Fields

AuthScheme
TipwProxyAuthSchemes
Default Value: 0

This property is used to tell the component which type of authorization to perform when connecting to the proxy. This is used only when the User and Password properties are set.

AuthScheme should be set to authNone (3) when no authentication is expected.

By default, AuthScheme is authBasic (0), and if the User and Password properties are set, the component will attempt basic authentication.

If AuthScheme is set to authDigest (1), digest authentication will be attempted instead.

If AuthScheme is set to authProprietary (2), then the authorization token will not be generated by the component. Look at the configuration file for the component being used to find more information about manually setting this token.

If AuthScheme is set to authNtlm (4), NTLM authentication will be used.

For security reasons, setting this property will clear the values of User and Password.

AutoDetect
Boolean
Default Value: False

This property tells the component whether or not to automatically detect and use proxy system settings, if available. The default value is False.

Password
String
Default Value: ""

This property contains a password if authentication is to be used for the proxy.

If AuthScheme is set to Basic Authentication, the User and Password are Base64 encoded and the proxy authentication token will be generated in the form Basic [encoded-user-password].

If AuthScheme is set to Digest Authentication, the User and Password properties are used to respond to the Digest Authentication challenge from the server.

If AuthScheme is set to NTLM Authentication, the User and Password properties are used to authenticate through NTLM negotiation.

Port
Integer
Default Value: 80

This property contains the Transmission Control Protocol (TCP) port for the proxy Server (default 80). See the description of the Server property for details.

Server
String
Default Value: ""

If a proxy Server is given, then the HTTP request is sent to the proxy instead of the server otherwise specified.

If the Server property is set to a domain name, a DNS request is initiated. Upon successful termination of the request, the Server property is set to the corresponding address. If the search is not successful, an error is returned.

SSL
TipwProxySSLTypes
Default Value: 0

This property determines when to use a Secure Sockets Layer (SSL) for the connection to the proxy. The applicable values are as follows:


psAutomatic (0)	Default setting. If the URL is an `https` URL, the component will use the `psTunnel` option. If the URL is an `http` URL, the component will use the `psNever` option.
psAlways (1)	The connection is always SSL enabled.
psNever (2)	The connection is not SSL enabled.
psTunnel (3)	The connection is made through a tunneling (HTTP) proxy.

User
String
Default Value: ""

This property contains a username if authentication is to be used for the proxy.

If AuthScheme is set to Basic Authentication, the User and Password properties are Base64 encoded and the proxy authentication token will be generated in the form Basic [encoded-user-password].

If AuthScheme is set to Digest Authentication, the User and Password properties are used to respond to the Digest Authentication challenge from the server.

If AuthScheme is set to NTLM Authentication, the User and Password properties are used to authenticate through NTLM negotiation.

Constructors

constructor Create();

constructor Create(valServer: String; valPort: Integer);

constructor Create(valServer: String; valPort: Integer; valUser: String; valPassword: String);

Config Settings (GRPC Component)

The component accepts one or more of the following configuration settings. Configuration settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the component, access to these internal properties is provided through the Config method.

GRPC Config Settings

ContentType: The HTTP2 content-type header value.

This configuration setting specifies the content-type header value that is sent in the request. The default value is application/grpc+proto.

HTTP2KeepaliveInterval: The keepalive interval in seconds.

This configuration setting specifies interval, in seconds, between HTTP2 keepalives. The keepalives are sent as an HTTP2 PING frame. The default value is 0 and keepalives will not be sent.

MessageDataHex: The hex encoded data for the current message.

This configuration setting may be queried at any time and will return the hex-encoded message data as a string. This is useful to obtain the raw message bytes in a string format that can be easily transmitted for storage or debugging purposes. This typically is useful only when it is necessary to record the raw message data for processing outside of the component.

UserAgent: The HTTP2 user-agent header value.

This configuration setting specifies the user-agent header value that is sent in the request. The default value is grpc-cpp/20.0.

HTTP Config Settings

AcceptEncoding: Used to tell the server which types of content encodings the client supports.

When AllowHTTPCompression is True, the component adds an Accept-Encoding header to the request being sent to the server. By default, this header's value is "gzip, deflate". This configuration setting allows you to change the value of the Accept-Encoding header. Note: The component only supports gzip and deflate decompression algorithms.

AllowHTTPCompression: This property enables HTTP compression for receiving data.

This configuration setting enables HTTP compression for receiving data. When set to True (default), the component will accept compressed data. It then will uncompress the data it has received. The component will handle data compressed by both gzip and deflate compression algorithms.

When True, the component adds an Accept-Encoding header to the outgoing request. The value for this header can be controlled by the AcceptEncoding configuration setting. The default value for this header is "gzip, deflate".

The default value is True.

AllowHTTPFallback: Whether HTTP/2 connections are permitted to fallback to HTTP/1.1.

This configuration setting controls whether HTTP/2 connections are permitted to fall back to HTTP/1.1 when the server does not support HTTP/2. This setting is applicable only when HTTPVersion is set to "2.0".

If set to True (default), the component will automatically use HTTP/1.1 if the server does not support HTTP/2. If set to False, the component raises an exception if the server does not support HTTP/2.

The default value is True.

Append: Whether to append data to LocalFile.

This configuration setting determines whether data will be appended when writing to LocalFile. When set to True, downloaded data will be appended to LocalFile. This may be used in conjunction with Range to resume a failed download. This is applicable only when LocalFile is set. The default value is False.

Authorization: The Authorization string to be sent to the server.

If the Authorization property contains a nonempty string, an Authorization HTTP request header is added to the request. This header conveys Authorization information to the server.

This property is provided so that the HTTP component can be extended with other security schemes in addition to the authorization schemes already implemented by the component.

The AuthScheme property defines the authentication scheme used. In the case of HTTP Basic Authentication (default), every time User and Password are set, they are Base64 encoded, and the result is put in the Authorization property in the form 'Basic [encoded-user-password]'.

BytesTransferred: Contains the number of bytes transferred in the response data.

This configuration setting returns the raw number of bytes from the HTTP response data, before the component processes the data, whether it is chunked or compressed. This returns the same value as the Transfer event, by BytesTransferred.

ChunkSize: Specifies the chunk size in bytes when using chunked encoding.

This is applicable only when UseChunkedEncoding is True. This setting specifies the chunk size in bytes to be used when posting data. The default value is 16384.

CompressHTTPRequest: Set to true to compress the body of a PUT or POST request.

If set to True, the body of a PUT or POST request will be compressed into gzip format before sending the request. The "Content-Encoding" header is also added to the outgoing request.

The default value is False.

EncodeURL: If set to True the URL will be encoded by the component.

If set to True, the URL passed to the component will be URL encoded. The default value is False.

FollowRedirects: Determines what happens when the server issues a redirect.

This option determines what happens when the server issues a redirect. Normally, the component returns an error if the server responds with an "Object Moved" message. If this property is set to 1 (always), the new URL for the object is retrieved automatically every time.

If this property is set to 2 (Same Scheme), the new URL is retrieved automatically only if the URL Scheme is the same; otherwise, the component raises an exception.

Note: Following the HTTP specification, unless this option is set to 1 (Always), automatic redirects will be performed only for GET or HEAD requests. Other methods potentially could change the conditions of the initial request and create security vulnerabilities.

Furthermore, if either the new URL server or port are different from the existing one, User and Password are also reset to empty, unless this property is set to 1 (Always), in which case the same credentials are used to connect to the new server.

The default value is 0 (Never). In this case, redirects are never followed, and the component raises an exception instead.

Following are the valid options:

0 - Never
1 - Always
2 - Same Scheme

GetOn302Redirect: If set to True the component will perform a GET on the new location.

The default value is False. If set to True, the component will perform a GET on the new location. Otherwise, it will use the same HTTP method again.

HTTP2HeadersWithoutIndexing: HTTP2 headers that should not update the dynamic header table with incremental indexing.

HTTP/2 servers maintain a dynamic table of headers and values seen over the course of a connection. Typically, these headers are inserted into the table through incremental indexing (also known as HPACK, defined in RFC 7541). To tell the component not to use incremental indexing for certain headers, and thus not update the dynamic table, set this configuration option to a comma-delimited list of the header names.

HTTPVersion: The version of HTTP used by the component.

This property specifies the HTTP version used by the component. Possible values are as follows:

"1.0"
"1.1" (default)
"2.0"
"3.0"

When using HTTP/2 ("2.0"), additional restrictions apply. Please see the following notes for details.

HTTP/2 Notes

When using HTTP/2, a secure Secure Sockets Layer/Transport Layer Security (TLS/SSL) connection is required. Attempting to use a plaintext URL with HTTP/2 will result in an error.

If the server does not support HTTP/2, the component will automatically use HTTP/1.1 instead. This is done to provide compatibility without the need for any additional settings. To see which version was used, check NegotiatedHTTPVersion after calling a method. The AllowHTTPFallback setting controls whether this behavior is allowed (default) or disallowed.

HTTP/3 Notes

HTTP/3 is supported only in .NET and Java.

When using HTTP/3, a secure (TLS/SSL) connection is required. Attempting to use a plaintext URL with HTTP/3 will result in an error.

IfModifiedSince: A date determining the maximum age of the desired document.

If this setting contains a nonempty string, an If-Modified-Since HTTP header is added to the request. The value of this header is used to make the HTTP request conditional: if the requested documented has not been modified since the time specified in the field, a copy of the document will not be returned from the server; instead, a 304 (not modified) response will be returned by the server and the component throws an exception

The format of the date value for IfModifiedSince is detailed in the HTTP specs. For example: Sat, 29 Oct 2017 19:43:31 GMT.

KeepAlive: Determines whether the HTTP connection is closed after completion of the request.

If True, the component will not send the Connection: Close header. The absence of the Connection header indicates to the server that HTTP persistent connections should be used if supported. Note: Not all servers support persistent connections. If False, the connection will be closed immediately after the server response is received.

The default value for KeepAlive is False.

KerberosSPN: The Service Principal Name for the Kerberos Domain Controller.

If the Service Principal Name on the Kerberos Domain Controller is not the same as the URL that you are authenticating to, the Service Principal Name should be set here.

LogLevel: The level of detail that is logged.

This configuration setting controls the level of detail that is logged through the Log event. Possible values are as follows:


0 (None)	No events are logged.
1 (Info - default)	Informational events are logged.
2 (Verbose)	Detailed data are logged.
3 (Debug)	Debug data are logged.

The value 1 (Info) logs basic information, including the URL, HTTP version, and status details.

The value 2 (Verbose) logs additional information about the request and response.

The value 3 (Debug) logs the headers and body for both the request and response, as well as additional debug information (if any).

MaxRedirectAttempts: Limits the number of redirects that are followed in a request.

When FollowRedirects is set to any value other than frNever, the component will follow redirects until this maximum number of redirect attempts are made. The default value is 20.

NegotiatedHTTPVersion: The negotiated HTTP version.

This configuration setting may be queried after the request is complete to indicate the HTTP version used. When HTTPVersion is set to "2.0" (if the server does not support "2.0"), then the component will fall back to using "1.1" automatically. This setting will indicate which version was used.

OtherHeaders: Other headers as determined by the user (optional).

This configuration setting can be set to a string of headers to be appended to the HTTP request headers.

The headers must follow the format "header: value" as described in the HTTP specifications. Header lines should be separated by CRLF ('#13#10') .

Use this configuration setting with caution. If this configuration setting contains invalid headers, HTTP requests may fail.

This configuration setting is useful for extending the functionality of the component beyond what is provided.

ProxyAuthorization: The authorization string to be sent to the proxy server.

This is similar to the Authorization configuration setting, but is used for proxy authorization. If this configuration setting contains a nonempty string, a Proxy-Authorization HTTP request header is added to the request. This header conveys proxy Authorization information to the server. If User and Password are specified, this value is calculated using the algorithm specified by AuthScheme.

ProxyAuthScheme: The authorization scheme to be used for the proxy.

This configuration setting is provided for use by components that do not directly expose Proxy properties.

ProxyPassword: A password if authentication is to be used for the proxy.

This configuration setting is provided for use by components that do not directly expose Proxy properties.

ProxyPort: Port for the proxy server (default 80).

This configuration setting is provided for use by components that do not directly expose Proxy properties.

ProxyServer: Name or IP address of a proxy server (optional).

This configuration setting is provided for use by components that do not directly expose Proxy properties.

ProxyUser: A user name if authentication is to be used for the proxy.

This configuration setting is provided for use by components that do not directly expose Proxy properties.

SentHeaders: The full set of headers as sent by the client.

This configuration setting returns the complete set of raw headers as sent by the client.

StatusCode: The status code of the last response from the server.

This configuration setting contains the result code of the last response from the server.

StatusLine: The first line of the last response from the server.

This setting contains the first line of the last response from the server. The format of the line will be [HTTP version] [Result Code] [Description].

TransferredData: The contents of the last response from the server.

This configuration setting contains the contents of the last response from the server.

TransferredDataLimit: The maximum number of incoming bytes to be stored by the component.

If TransferredDataLimit is set to 0 (default), no limits are imposed. Otherwise, this reflects the maximum number of incoming bytes that can be stored by the component.

TransferredHeaders: The full set of headers as received from the server.

This configuration setting returns the complete set of raw headers as received from the server.

TransferredRequest: The full request as sent by the client.

This configuration setting returns the full request as sent by the client. For performance reasons, the request is not normally saved. Set this configuration setting to ON before making a request to enable it. Following are examples of this request:

.NET Http http = new Http(); http.Config("TransferredRequest=on"); http.PostData = "body"; http.Post("http://someserver.com"); Console.WriteLine(http.Config("TransferredRequest")); C++ HTTP http; http.Config("TransferredRequest=on"); http.SetPostData("body", 5); http.Post("http://someserver.com"); printf("%s\r\n", http.Config("TransferredRequest"));

UseChunkedEncoding: Enables or Disables HTTP chunked encoding for transfers.

If UseChunkedEncoding is set to True, the component will use HTTP-chunked encoding when posting, if possible. HTTP-chunked encoding allows large files to be sent in chunks instead of all at once. If set to False, the component will not use HTTP-chunked encoding. The default value is False.

Note: Some servers (such as the ASP.NET Development Server) may not support chunked encoding.

UseIDNs: Whether to encode hostnames to internationalized domain names.

This configuration setting specifies whether hostnames containing non-ASCII characters are encoded to internationalized domain names. When set to True, if a hostname contains non-ASCII characters, it is encoded using Punycode to an IDN (internationalized domain name).

The default value is False and the hostname will always be used exactly as specified. Note: The CodePage setting must be set to a value capable of interpreting the specified host name. For instance, to specify UTF-8, set CodePage to 65001.

UseProxyAutoConfigURL: Whether to use a Proxy auto-config file when attempting a connection.

This configuration specifies whether the component will attempt to use the Proxy auto-config URL when establishing a connection and AutoDetect is set to True.

When True (default), the component will check for the existence of a Proxy auto-config URL, and if found, will determine the appropriate proxy to use.

UserAgent: Information about the user agent (browser).

This is the value supplied in the HTTP User-Agent header. The default setting is "IPWorks HTTP Component - www.nsoftware.com".

Override the default with the name and version of your software.

TCPClient Config Settings

CloseStreamAfterTransfer: If true, the component will close the upload or download stream after the transfer.

This setting determines whether the input or output stream is closed after the transfer completes. When set to True (default), all streams will be closed after a transfer is completed. In order to keep streams open after the transfer of data, set this to False. the default value is True.

ConnectionTimeout: Sets a separate timeout value for establishing a connection.

When set, this configuration setting allows you to specify a different timeout value for establishing a connection. Otherwise, the component will use Timeout for establishing a connection and transmitting/receiving data.

FirewallAutoDetect: Tells the component whether or not to automatically detect and use firewall system settings, if available.

This configuration setting is provided for use by components that do not directly expose Firewall properties.

FirewallHost: Name or IP address of firewall (optional).

If a FirewallHost is given, requested connections will be authenticated through the specified firewall when connecting.

If the FirewallHost setting is set to a Domain Name, a DNS request is initiated. Upon successful termination of the request, the FirewallHost setting is set to the corresponding address. If the search is not successful, an error is returned.

Note: This setting is provided for use by components that do not directly expose Firewall properties.

FirewallPassword: Password to be used if authentication is to be used when connecting through the firewall.

If FirewallHost is specified, the FirewallUser and FirewallPassword settings are used to connect and authenticate to the given firewall. If the authentication fails, the component raises an exception.

Note: This setting is provided for use by components that do not directly expose Firewall properties.

FirewallPort: The TCP port for the FirewallHost;.

The FirewallPort is set automatically when FirewallType is set to a valid value.

Note: This configuration setting is provided for use by components that do not directly expose Firewall properties.

FirewallType: Determines the type of firewall to connect through.

The appropriate values are as follows:


0	No firewall (default setting).
1	Connect through a tunneling proxy. FirewallPort is set to 80.
2	Connect through a SOCKS4 Proxy. FirewallPort is set to 1080.
3	Connect through a SOCKS5 Proxy. FirewallPort is set to 1080.
10	Connect through a SOCKS4A Proxy. FirewallPort is set to 1080.

Note: This setting is provided for use by components that do not directly expose Firewall properties.

FirewallUser: A user name if authentication is to be used connecting through a firewall.

If the FirewallHost is specified, the FirewallUser and FirewallPassword settings are used to connect and authenticate to the Firewall. If the authentication fails, the component raises an exception.

Note: This setting is provided for use by components that do not directly expose Firewall properties.

KeepAliveInterval: The retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received.

When set, TCPKeepAlive will automatically be set to True. A TCP keep-alive packet will be sent after a period of inactivity as defined by KeepAliveTime. If no acknowledgment is received from the remote host, the keep-alive packet will be sent again. This configuration setting specifies the interval at which the successive keep-alive packets are sent in milliseconds. This system default if this value is not specified here is 1 second.

Note: This value is not applicable in macOS.

KeepAliveTime: The inactivity time in milliseconds before a TCP keep-alive packet is sent.

When set, TCPKeepAlive will automatically be set to True. By default, the operating system will determine the time a connection is idle before a Transmission Control Protocol (TCP) keep-alive packet is sent. This system default if this value is not specified here is 2 hours. In many cases, a shorter interval is more useful. Set this value to the desired interval in milliseconds.

Linger: When set to True, connections are terminated gracefully.

This property controls how a connection is closed. The default is True.

In the case that Linger is True (default), two scenarios determine how long the connection will linger. In the first, if LingerTime is 0 (default), the system will attempt to send pending data for a connection until the default IP timeout expires.

In the second scenario, if LingerTime is a positive value, the system will attempt to send pending data until the specified LingerTime is reached. If this attempt fails, then the system will reset the connection.

The default behavior (which is also the default mode for stream sockets) might result in a long delay in closing the connection. Although the component returns control immediately, the system could hold system resources until all pending data are sent (even after your application closes).

Setting this property to False forces an immediate disconnection. If you know that the other side has received all the data you sent (e.g., by a client acknowledgment), setting this property to False might be the appropriate course of action.

LingerTime: Time in seconds to have the connection linger.

LingerTime is the time, in seconds, the socket connection will linger. This value is 0 by default, which means it will use the default IP timeout.

LocalHost: The name of the local host through which connections are initiated or accepted.

The LocalHost setting contains the name of the local host as obtained by the gethostname() system call, or if the user has assigned an IP address, the value of that address.

In multi-homed hosts (machines with more than one IP interface) setting LocalHost to the value of an interface will make the component initiate connections (or accept in the case of server components) only through that interface.

If the component is connected, the LocalHost setting shows the IP address of the interface through which the connection is made in internet dotted format (aaa.bbb.ccc.ddd). In most cases, this is the address of the local host, except for multi-homed hosts (machines with more than one IP interface).

LocalPort: The port in the local host where the component binds.

This must be set before a connection is attempted. It instructs the component to bind to a specific port (or communication endpoint) in the local machine.

Setting this to 0 (default) enables the system to choose a port at random. The chosen port will be shown by LocalPort after the connection is established.

LocalPort cannot be changed once a connection is made. Any attempt to set this when a connection is active will generate an error.

This; setting is useful when trying to connect to services that require a trusted port in the client side. An example is the remote shell (rsh) service in UNIX systems.

MaxLineLength: The maximum amount of data to accumulate when no EOL is found.

MaxLineLength is the size of an internal buffer, which holds received data while waiting for an EOL string.

If an EOL string is found in the input stream before MaxLineLength bytes are received, the DataIn event is fired with the EOL parameter set to True, and the buffer is reset.

If no EOL is found, and MaxLineLength bytes are accumulated in the buffer, the DataIn event is fired with the EOL parameter set to False, and the buffer is reset.

The minimum value for MaxLineLength is 256 bytes. The default value is 2048 bytes.

MaxTransferRate: The transfer rate limit in bytes per second.

This configuration setting can be used to throttle outbound TCP traffic. Set this to the number of bytes to be sent per second. By default, this is not set and there is no limit.

ProxyExceptionsList: A semicolon separated list of hosts and IPs to bypass when using a proxy.

This configuration setting optionally specifies a semicolon-separated list of hostnames or IP addresses to bypass when a proxy is in use. When requests are made to hosts specified in this property, the proxy will not be used. For instance:

www.google.com;www.nsoftware.com

TCPKeepAlive: Determines whether or not the keep alive socket option is enabled.

If set to True, the socket's keep-alive option is enabled and keep-alive packets will be sent periodically to maintain the connection. Set KeepAliveTime and KeepAliveInterval to configure the timing of the keep-alive packets.

Note: This value is not applicable in Java.

TcpNoDelay: Whether or not to delay when sending packets.

When true, the socket will send all data that is ready to send at once. When false, the socket will send smaller buffered packets of data at small intervals. This is known as the Nagle algorithm.

By default, this config is set to false.

UseIPv6: Whether to use IPv6.

When set to 0 (default), the component will use IPv4 exclusively. When set to 1, the component will use IPv6 exclusively. To instruct the component to prefer IPv6 addresses, but use IPv4 if IPv6 is not supported on the system, this setting should be set to 2. The default value is 0. Possible values are:


0	IPv4 Only
1	IPv6 Only
2	IPv6 with IPv4 fallback

SSL Config Settings

LogSSLPackets: Controls whether SSL packets are logged when using the internal security API.

When SSLProvider is set to Internal, this setting controls whether SSL packets should be logged. By default, this setting is False, as it is only useful for debugging purposes.

When enabled, SSL packet logs are output using the SSLStatus event, which will fire each time an SSL packet is sent or received.

Enabling this setting has no effect if SSLProvider is set to Platform.

OpenSSLCADir: The path to a directory containing CA certificates.

This functionality is available only when the provider is OpenSSL.

The path set by this property should point to a directory containing CA certificates in PEM format. The files each contain one CA certificate. The files are looked up by the CA subject name hash value, which must hence be available. If more than one CA certificate with the same name hash value exist, the extension must be different (e.g. 9d66eef0.0, 9d66eef0.1 etc). OpenSSL recommends to use the c_rehash utility to create the necessary links. Please refer to the OpenSSL man page SSL_CTX_load_verify_locations(3) for details.

OpenSSLCAFile: Name of the file containing the list of CA's trusted by your application.

This functionality is available only when the provider is OpenSSL.

The file set by this property should contain a list of CA certificates in PEM format. The file can contain several CA certificates identified by

-----BEGIN CERTIFICATE-----

... (CA certificate in base64 encoding) ...

-----END CERTIFICATE-----

sequences. Before, between, and after the certificates text is allowed which can be used e.g. for descriptions of the certificates. Please refer to the OpenSSL man page SSL_CTX_load_verify_locations(3) for details.

OpenSSLCipherList: A string that controls the ciphers to be used by SSL.

This functionality is available only when the provider is OpenSSL.

The format of this string is described in the OpenSSL man page ciphers(1) section "CIPHER LIST FORMAT". Please refer to it for details. The default string "DEFAULT" is determined at compile time and is normally equivalent to "ALL:!ADH:RC4+RSA:+SSLv2:@STRENGTH".

OpenSSLPrngSeedData: The data to seed the pseudo random number generator (PRNG).

This functionality is available only when the provider is OpenSSL.

By default OpenSSL uses the device file "/dev/urandom" to seed the PRNG and setting OpenSSLPrngSeedData is not required. If set, the string specified is used to seed the PRNG.

ReuseSSLSession: Determines if the SSL session is reused.

If set to true, the component will reuse the context if and only if the following criteria are met:

The target host name is the same.
The system cache entry has not expired (default timeout is 10 hours).
The application process that calls the function is the same.
The logon session is the same.
The instance of the component is the same.

SSLCACerts: A newline separated list of CA certificate to use during SSL client authentication.

This setting specifies one or more CA certificates to be included in the request when performing SSL client authentication. Some servers require the entire chain, including CA certificates, to be presented when performing SSL client authentication. The value of this setting is a newline (CrLf) separated list of certificates. For instance:

-----BEGIN CERTIFICATE-----
MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw
...
eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w
F0I1XhM+pKj7FjDr+XNj
-----END CERTIFICATE-----
\r \n
-----BEGIN CERTIFICATE-----
MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp
..
d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA
-----END CERTIFICATE-----

SSLCheckCRL: Whether to check the Certificate Revocation List for the server certificate.

This setting specifies whether the component will check the Certificate Revocation List specified by the server certificate. If set to 1 or 2, the component will first obtain the list of CRL URLs from the server certificate's CRL distribution points extension. The component will then make HTTP requests to each CRL endpoint to check the validity of the server's certificate. If the certificate has been revoked or any other issues are found during validation the component raises an exception.

When set to 0 (default) the CRL check will not be performed by the component. When set to 1, it will attempt to perform the CRL check, but will continue without an error if the server's certificate does not support CRL. When set to 2, it will perform the CRL check and will throw an error if CRL is not supported.

This configuration setting is only supported in the Java, C#, and C++ editions. In the C++ edition, it is only supported on Windows operating systems.

SSLCheckOCSP: Whether to use OCSP to check the status of the server certificate.

This setting specifies whether the component will use OCSP to check the validity of the server certificate. If set to 1 or 2, the component will first obtain the OCSP URL from the server certificate's OCSP extension. The component will then locate the issuing certificate and make an HTTP request to the OCSP endpoint to check the validity of the server's certificate. If the certificate has been revoked or any other issues are found during validation the component raises an exception.

When set to 0 (default) the component will not perform an OCSP check. When set to 1, it will attempt to perform the OCSP check, but will continue without an error if the server's certificate does not support OCSP. When set to 2, it will perform the OCSP check and will throw an error if OCSP is not supported.

This configuration setting is only supported in the Java, C#, and C++ editions. In the C++ edition, it is only supported on Windows operating systems.

SSLCipherStrength: The minimum cipher strength used for bulk encryption.

This minimum cipher strength largely dependent on the security modules installed on the system. If the cipher strength specified is not supported, an error will be returned when connections are initiated.

Please note that this setting contains the minimum cipher strength requested from the security library. The actual cipher strength used for the connection is shown by the SSLStatus event.

Use this setting with caution. Requesting a lower cipher strength than necessary could potentially cause serious security vulnerabilities in your application.

When the provider is OpenSSL, SSLCipherStrength is currently not supported. This functionality is instead made available through the OpenSSLCipherList config setting.

SSLEnabledCipherSuites: The cipher suite to be used in an SSL negotiation.

The enabled cipher suites to be used in SSL negotiation.

By default, the enabled cipher suites will include all available ciphers ("*").

The special value "*" means that the component will pick all of the supported cipher suites. If SSLEnabledCipherSuites is set to any other value, only the specified cipher suites will be considered.

Multiple cipher suites are separated by semicolons.

Example values when SSLProvider is set to Platform: obj.config("SSLEnabledCipherSuites=*"); obj.config("SSLEnabledCipherSuites=CALG_AES_256"); obj.config("SSLEnabledCipherSuites=CALG_AES_256;CALG_3DES"); Possible values when SSLProvider is set to Platform include:

CALG_3DES
CALG_3DES_112
CALG_AES
CALG_AES_128
CALG_AES_192
CALG_AES_256
CALG_AGREEDKEY_ANY
CALG_CYLINK_MEK
CALG_DES
CALG_DESX
CALG_DH_EPHEM
CALG_DH_SF
CALG_DSS_SIGN
CALG_ECDH
CALG_ECDH_EPHEM
CALG_ECDSA
CALG_ECMQV
CALG_HASH_REPLACE_OWF
CALG_HUGHES_MD5
CALG_HMAC
CALG_KEA_KEYX
CALG_MAC
CALG_MD2
CALG_MD4
CALG_MD5
CALG_NO_SIGN
CALG_OID_INFO_CNG_ONLY
CALG_OID_INFO_PARAMETERS
CALG_PCT1_MASTER
CALG_RC2
CALG_RC4
CALG_RC5
CALG_RSA_KEYX
CALG_RSA_SIGN
CALG_SCHANNEL_ENC_KEY
CALG_SCHANNEL_MAC_KEY
CALG_SCHANNEL_MASTER_HASH
CALG_SEAL
CALG_SHA
CALG_SHA1
CALG_SHA_256
CALG_SHA_384
CALG_SHA_512
CALG_SKIPJACK
CALG_SSL2_MASTER
CALG_SSL3_MASTER
CALG_SSL3_SHAMD5
CALG_TEK
CALG_TLS1_MASTER
CALG_TLS1PRF

Example values when SSLProvider is set to Internal:

obj.config("SSLEnabledCipherSuites=*");
obj.config("SSLEnabledCipherSuites=TLS_DHE_DSS_WITH_AES_128_CBC_SHA");
obj.config("SSLEnabledCipherSuites=TLS_DHE_DSS_WITH_AES_128_CBC_SHA;TLS_DH_ANON_WITH_AES_128_CBC_SHA");

Possible values when SSLProvider is set to Internal include:

TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384
TLS_RSA_WITH_AES_256_GCM_SHA384
TLS_RSA_WITH_AES_128_GCM_SHA256
TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256
TLS_DHE_DSS_WITH_AES_256_GCM_SHA384
TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384
TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256
TLS_DHE_RSA_WITH_AES_128_GCM_SHA256
TLS_DHE_DSS_WITH_AES_128_GCM_SHA256
TLS_DH_RSA_WITH_AES_128_GCM_SHA256 (Not Recommended)
TLS_DH_RSA_WITH_AES_256_GCM_SHA384 (Not Recommended)
TLS_DH_DSS_WITH_AES_128_GCM_SHA256 (Not Recommended)
TLS_DH_DSS_WITH_AES_256_GCM_SHA384 (Not Recommended)
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384
TLS_DHE_DSS_WITH_AES_256_CBC_SHA256
TLS_RSA_WITH_AES_256_CBC_SHA256
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384
TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
TLS_RSA_WITH_AES_128_CBC_SHA256
TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256
TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256
TLS_DHE_DSS_WITH_AES_128_CBC_SHA256
TLS_RSA_WITH_AES_256_CBC_SHA
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA
TLS_DHE_RSA_WITH_AES_256_CBC_SHA
TLS_ECDH_RSA_WITH_AES_256_CBC_SHA
TLS_DHE_DSS_WITH_AES_256_CBC_SHA
TLS_RSA_WITH_AES_128_CBC_SHA
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA
TLS_ECDH_RSA_WITH_AES_128_CBC_SHA
TLS_DHE_RSA_WITH_AES_128_CBC_SHA
TLS_DHE_DSS_WITH_AES_128_CBC_SHA
TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA
TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA
TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA
TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA
TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA
TLS_RSA_WITH_3DES_EDE_CBC_SHA
TLS_RSA_WITH_DES_CBC_SHA
TLS_DHE_RSA_WITH_DES_CBC_SHA
TLS_DHE_DSS_WITH_DES_CBC_SHA
TLS_RSA_WITH_RC4_128_MD5
TLS_RSA_WITH_RC4_128_SHA

When TLS 1.3 is negotiated (see SSLEnabledProtocols) only the following cipher suites are supported:

TLS_AES_256_GCM_SHA384
TLS_CHACHA20_POLY1305_SHA256
TLS_AES_128_GCM_SHA256

SSLEnabledCipherSuites is used together with SSLCipherStrength.

SSLEnabledProtocols: Used to enable/disable the supported security protocols.

Used to enable/disable the supported security protocols.

Not all supported protocols are enabled by default (the value of this setting is 4032). If you want more granular control over the enabled protocols, you can set this property to the binary 'OR' of one or more of the following values:


TLS1.3	12288 (Hex 3000)
TLS1.2	3072 (Hex C00) (Default)
TLS1.1	768 (Hex 300) (Default)
TLS1	192 (Hex C0) (Default)
SSL3	48 (Hex 30) [Platform Only]
SSL2	12 (Hex 0C) [Platform Only]

SSLEnabledProtocols - TLS 1.3 Notes

By default when TLS 1.3 is enabled the component will use the internal TLS implementation when the SSLProvider is set to Automatic for all editions.

In editions which are designed to run on Windows SSLProvider can be set to Platform to use the platform implementation instead of the internal implementation. When configured in this manner, please note that the platform provider is only supported on Windows 11 / Windows Server 2022 and up. The default internal provider is available on all platforms and is not restricted to any specific OS version.

If set to 1 (Platform provider) please be aware of the following notes:

The platform provider is only available on Windows 11 / Windows Server 2022 and up.
SSLEnabledCipherSuites and other similar SSL configuration settings are not supported.
If SSLEnabledProtocols includes both TLS 1.3 and TLS 1.2 the above restrictions are still applicable even if TLS 1.2 is negotiated. Enabling TLS 1.3 with the platform provider changes the implementation used for all TLS versions.

SSLEnabledProtocols: SSL2 and SSL3 Notes:

SSL 2.0 and 3.0 are not supported by the component when the SSLProvider is set to internal. To use SSL 2.0 or SSL 3.0, the platform security API must have the protocols enabled and SSLProvider needs to be set to platform.

SSLEnableRenegotiation: Whether the renegotiation_info SSL extension is supported.

This setting specifies whether the renegotiation_info SSL extension will be used in the request when using the internal security API. This setting is True by default, but can be set to False to disable the extension.

This setting is only applicable when SSLProvider is set to Internal.

SSLIncludeCertChain: Whether the entire certificate chain is included in the SSLServerAuthentication event.

This setting specifies whether the Encoded parameter of the SSLServerAuthentication event contains the full certificate chain. By default this value is False and only the leaf certificate will be present in the Encoded parameter of the SSLServerAuthentication event.

If set to True all certificates returned by the server will be present in the Encoded parameter of the SSLServerAuthentication event. This includes the leaf certificate, any intermediate certificate, and the root certificate.

SSLKeyLogFile: The location of a file where per-session secrets are written for debugging purposes.

This setting optionally specifies the full path to a file on disk where per-session secrets are stored for debugging purposes.

When set, the component will save the session secrets in the same format as the SSLKEYLOGFILE environment variable functionality used by most major browsers and tools such as Chrome, Firefox, and cURL. This file can then be used in tools such as Wireshark to decrypt TLS traffice for debugging purposes. When writing to this file the component will only append, it will not overwrite previous values.

Note: This setting is only applicable when SSLProvider is set to Internal.

SSLNegotiatedCipher: Returns the negotiated cipher suite.

Returns the cipher suite negotiated during the SSL handshake.

Note: For server components (e.g. TCPServer) this is a per-connection setting accessed by passing the ConnectionId. For example: server.Config("SSLNegotiatedCipher[connId]");

SSLNegotiatedCipherStrength: Returns the negotiated cipher suite strength.

Returns the strength of the cipher suite negotiated during the SSL handshake.

Note: For server components (e.g.TCPServer) this is a per-connection setting accessed by passing the ConnectionId. For example: server.Config("SSLNegotiatedCipherStrength[connId]");

SSLNegotiatedCipherSuite: Returns the negotiated cipher suite.

Returns the cipher suite negotiated during the SSL handshake represented as a single string.

Note: For server components (e.g. TCPServer) this is a per-connection setting accessed by passing the ConnectionId. For example: server.Config("SSLNegotiatedCipherSuite[connId]");

SSLNegotiatedKeyExchange: Returns the negotiated key exchange algorithm.

Returns the key exchange algorithm negotiated during the SSL handshake.

Note: For server components (e.g. TCPServer) this is a per-connection setting accessed by passing the ConnectionId. For example: server.Config("SSLNegotiatedKeyExchange[connId]");

SSLNegotiatedKeyExchangeStrength: Returns the negotiated key exchange algorithm strength.

Returns the strenghth of the key exchange algorithm negotiated during the SSL handshake.

Note: For server components (e.g. TCPServer) this is a per-connection setting accessed by passing the ConnectionId. For example: server.Config("SSLNegotiatedKeyExchangeStrength[connId]");

SSLNegotiatedVersion: Returns the negotiated protocol version.

Returns the protocol version negotiated during the SSL handshake.

Note: For server components (e.g. TCPServer) this is a per-connection setting accessed by passing the ConnectionId. For example: server.Config("SSLNegotiatedVersion[connId]");

SSLSecurityFlags: Flags that control certificate verification.

The following flags are defined (specified in hexadecimal notation). They can be or-ed together to exclude multiple conditions:


0x00000001	Ignore time validity status of certificate.
0x00000002	Ignore time validity status of CTL.
0x00000004	Ignore non-nested certificate times.
0x00000010	Allow unknown Certificate Authority.
0x00000020	Ignore wrong certificate usage.
0x00000100	Ignore unknown certificate revocation status.
0x00000200	Ignore unknown CTL signer revocation status.
0x00000400	Ignore unknown Certificate Authority revocation status.
0x00000800	Ignore unknown Root revocation status.
0x00008000	Allow test Root certificate.
0x00004000	Trust test Root certificate.
0x80000000	Ignore non-matching CN (certificate CN not-matching server name).

This functionality is currently not available when the provider is OpenSSL.

SSLServerCACerts: A newline separated list of CA certificate to use during SSL server certificate validation.

This setting optionally specifies one or more CA certificates to be used when verifying the server certificate. When verifying the server's certificate the certificates trusted by the system will be used as part of the verification process. If the server's CA certificates are not installed to the trusted system store, they may be specified here so they are included when performing the verification process. This setting should only be set if the server's CA certificates are not already trusted on the system and cannot be installed to the trusted system store.

The value of this setting is a newline (CrLf) separated list of certificates. For instance:

-----BEGIN CERTIFICATE-----
MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw
...
eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w
F0I1XhM+pKj7FjDr+XNj
-----END CERTIFICATE-----
\r \n
-----BEGIN CERTIFICATE-----
MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp
..
d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA
-----END CERTIFICATE-----

TLS12SignatureAlgorithms: Defines the allowed TLS 1.2 signature algorithms when SSLProvider is set to Internal.

This setting specifies the allowed server certificate signature algorithms when SSLProvider is set to Internal and SSLEnabledProtocols is set to allow TLS 1.2.

When specified the component will verify that the server certificate signature algorithm is among the values specified in this setting. If the server certificate signature algorithm is unsupported the component raises an exception.

The format of this value is a comma separated list of hash-signature combinations. For instance: component.SSLProvider = TCPClientSSLProviders.sslpInternal; component.Config("SSLEnabledProtocols=3072"); //TLS 1.2 component.Config("TLS12SignatureAlgorithms=sha256-rsa,sha256-dsa,sha1-rsa,sha1-dsa"); The default value for this setting is sha512-ecdsa,sha512-rsa,sha512-dsa,sha384-ecdsa,sha384-rsa,sha384-dsa,sha256-ecdsa,sha256-rsa,sha256-dsa,sha224-ecdsa,sha224-rsa,sha224-dsa,sha1-ecdsa,sha1-rsa,sha1-dsa.

In order to not restrict the server's certificate signature algorithm, specify an empty string as the value for this setting, which will cause the signature_algorithms TLS 1.2 extension to not be sent.

TLS12SupportedGroups: The supported groups for ECC.

This setting specifies a comma separated list of named groups used in TLS 1.2 for ECC.

The default value is ecdhe_secp256r1,ecdhe_secp384r1,ecdhe_secp521r1.

When using TLS 1.2 and SSLProvider is set to Internal, the values refer to the supported groups for ECC. The following values are supported:

"ecdhe_secp256r1" (default)
"ecdhe_secp384r1" (default)
"ecdhe_secp521r1" (default)

TLS13KeyShareGroups: The groups for which to pregenerate key shares.

This setting specifies a comma separated list of named groups used in TLS 1.3 for key exchange. The groups specified here will have key share data pregenerated locally before establishing a connection. This can prevent an additional round trip during the handshake if the group is supported by the server.

The default value is set to balance common supported groups and the computational resources required to generate key shares. As a result only some groups are included by default in this setting.

Note: All supported groups can always be used during the handshake even if not listed here, but if a group is used which is not present in this list it will incur an additional round trip and time to generate the key share for that group.

In most cases this setting does not need to be modified. This should only be modified if there is a specific reason to do so.

The default value is ecdhe_x25519,ecdhe_secp256r1,ecdhe_secp384r1,ffdhe_2048,ffdhe_3072

The values are ordered from most preferred to least preferred. The following values are supported:

"ecdhe_x25519" (default)
"ecdhe_x448"
"ecdhe_secp256r1" (default)
"ecdhe_secp384r1" (default)
"ecdhe_secp521r1"
"ffdhe_2048" (default)
"ffdhe_3072" (default)
"ffdhe_4096"
"ffdhe_6144"
"ffdhe_8192"

TLS13SignatureAlgorithms: The allowed certificate signature algorithms.

This setting holds a comma separated list of allowed signature algorithms. Possible values are:

"ed25519" (default)
"ed448" (default)
"ecdsa_secp256r1_sha256" (default)
"ecdsa_secp384r1_sha384" (default)
"ecdsa_secp521r1_sha512" (default)
"rsa_pkcs1_sha256" (default)
"rsa_pkcs1_sha384" (default)
"rsa_pkcs1_sha512" (default)
"rsa_pss_sha256" (default)
"rsa_pss_sha384" (default)
"rsa_pss_sha512" (default)

The default value is rsa_pss_sha256,rsa_pss_sha384,rsa_pss_sha512,rsa_pkcs1_sha256,rsa_pkcs1_sha384,rsa_pkcs1_sha512,ecdsa_secp256r1_sha256,ecdsa_secp384r1_sha384,ecdsa_secp521r1_sha512,ed25519,ed448. This setting is only applicable when SSLEnabledProtocols includes TLS 1.3.

TLS13SupportedGroups: The supported groups for (EC)DHE key exchange.

This setting specifies a comma separated list of named groups used in TLS 1.3 for key exchange. This setting should only be modified if there is a specific reason to do so.

The default value is ecdhe_x25519,ecdhe_x448,ecdhe_secp256r1,ecdhe_secp384r1,ecdhe_secp521r1,ffdhe_2048,ffdhe_3072,ffdhe_4096,ffdhe_6144,ffdhe_8192

The values are ordered from most preferred to least preferred. The following values are supported:

"ecdhe_x25519" (default)
"ecdhe_x448" (default)
"ecdhe_secp256r1" (default)
"ecdhe_secp384r1" (default)
"ecdhe_secp521r1" (default)
"ffdhe_2048" (default)
"ffdhe_3072" (default)
"ffdhe_4096" (default)
"ffdhe_6144" (default)
"ffdhe_8192" (default)

Socket Config Settings

AbsoluteTimeout: Determines whether timeouts are inactivity timeouts or absolute timeouts.

If AbsoluteTimeout is set to True, any method which does not complete within Timeout seconds will be aborted. By default, AbsoluteTimeout is False, and the timeout is an inactivity timeout.

Note: This option is not valid for UDP ports.

FirewallData: Used to send extra data to the firewall.

When the firewall is a tunneling proxy, use this property to send custom (additional) headers to the firewall (e.g. headers for custom authentication schemes).

InBufferSize: The size in bytes of the incoming queue of the socket.

This is the size of an internal queue in the TCP/IP stack. You can increase or decrease its size depending on the amount of data that you will be receiving. Increasing the value of the InBufferSize setting can provide significant improvements in performance in some cases.

Some TCP/IP implementations do not support variable buffer sizes. If that is the case, when the component is activated the InBufferSize reverts to its defined size. The same happens if you attempt to make it too large or too small.

OutBufferSize: The size in bytes of the outgoing queue of the socket.

This is the size of an internal queue in the TCP/IP stack. You can increase or decrease its size depending on the amount of data that you will be sending. Increasing the value of the OutBufferSize setting can provide significant improvements in performance in some cases.

Some TCP/IP implementations do not support variable buffer sizes. If that is the case, when the component is activated the OutBufferSize reverts to its defined size. The same happens if you attempt to make it too large or too small.

Base Config Settings

BuildInfo: Information about the product's build.

When queried, this setting will return a string containing information about the product's build.

CodePage: The system code page used for Unicode to Multibyte translations.

The default code page is Unicode UTF-8 (65001).

The following is a list of valid code page identifiers:


Identifier	Name
037	IBM EBCDIC - U.S./Canada
437	OEM - United States
500	IBM EBCDIC - International
708	Arabic - ASMO 708
709	Arabic - ASMO 449+, BCON V4
710	Arabic - Transparent Arabic
720	Arabic - Transparent ASMO
737	OEM - Greek (formerly 437G)
775	OEM - Baltic
850	OEM - Multilingual Latin I
852	OEM - Latin II
855	OEM - Cyrillic (primarily Russian)
857	OEM - Turkish
858	OEM - Multilingual Latin I + Euro symbol
860	OEM - Portuguese
861	OEM - Icelandic
862	OEM - Hebrew
863	OEM - Canadian-French
864	OEM - Arabic
865	OEM - Nordic
866	OEM - Russian
869	OEM - Modern Greek
870	IBM EBCDIC - Multilingual/ROECE (Latin-2)
874	ANSI/OEM - Thai (same as 28605, ISO 8859-15)
875	IBM EBCDIC - Modern Greek
932	ANSI/OEM - Japanese, Shift-JIS
936	ANSI/OEM - Simplified Chinese (PRC, Singapore)
949	ANSI/OEM - Korean (Unified Hangul Code)
950	ANSI/OEM - Traditional Chinese (Taiwan; Hong Kong SAR, PRC)
1026	IBM EBCDIC - Turkish (Latin-5)
1047	IBM EBCDIC - Latin 1/Open System
1140	IBM EBCDIC - U.S./Canada (037 + Euro symbol)
1141	IBM EBCDIC - Germany (20273 + Euro symbol)
1142	IBM EBCDIC - Denmark/Norway (20277 + Euro symbol)
1143	IBM EBCDIC - Finland/Sweden (20278 + Euro symbol)
1144	IBM EBCDIC - Italy (20280 + Euro symbol)
1145	IBM EBCDIC - Latin America/Spain (20284 + Euro symbol)
1146	IBM EBCDIC - United Kingdom (20285 + Euro symbol)
1147	IBM EBCDIC - France (20297 + Euro symbol)
1148	IBM EBCDIC - International (500 + Euro symbol)
1149	IBM EBCDIC - Icelandic (20871 + Euro symbol)
1200	Unicode UCS-2 Little-Endian (BMP of ISO 10646)
1201	Unicode UCS-2 Big-Endian
1250	ANSI - Central European
1251	ANSI - Cyrillic
1252	ANSI - Latin I
1253	ANSI - Greek
1254	ANSI - Turkish
1255	ANSI - Hebrew
1256	ANSI - Arabic
1257	ANSI - Baltic
1258	ANSI/OEM - Vietnamese
1361	Korean (Johab)
10000	MAC - Roman
10001	MAC - Japanese
10002	MAC - Traditional Chinese (Big5)
10003	MAC - Korean
10004	MAC - Arabic
10005	MAC - Hebrew
10006	MAC - Greek I
10007	MAC - Cyrillic
10008	MAC - Simplified Chinese (GB 2312)
10010	MAC - Romania
10017	MAC - Ukraine
10021	MAC - Thai
10029	MAC - Latin II
10079	MAC - Icelandic
10081	MAC - Turkish
10082	MAC - Croatia
12000	Unicode UCS-4 Little-Endian
12001	Unicode UCS-4 Big-Endian
20000	CNS - Taiwan
20001	TCA - Taiwan
20002	Eten - Taiwan
20003	IBM5550 - Taiwan
20004	TeleText - Taiwan
20005	Wang - Taiwan
20105	IA5 IRV International Alphabet No. 5 (7-bit)
20106	IA5 German (7-bit)
20107	IA5 Swedish (7-bit)
20108	IA5 Norwegian (7-bit)
20127	US-ASCII (7-bit)
20261	T.61
20269	ISO 6937 Non-Spacing Accent
20273	IBM EBCDIC - Germany
20277	IBM EBCDIC - Denmark/Norway
20278	IBM EBCDIC - Finland/Sweden
20280	IBM EBCDIC - Italy
20284	IBM EBCDIC - Latin America/Spain
20285	IBM EBCDIC - United Kingdom
20290	IBM EBCDIC - Japanese Katakana Extended
20297	IBM EBCDIC - France
20420	IBM EBCDIC - Arabic
20423	IBM EBCDIC - Greek
20424	IBM EBCDIC - Hebrew
20833	IBM EBCDIC - Korean Extended
20838	IBM EBCDIC - Thai
20866	Russian - KOI8-R
20871	IBM EBCDIC - Icelandic
20880	IBM EBCDIC - Cyrillic (Russian)
20905	IBM EBCDIC - Turkish
20924	IBM EBCDIC - Latin-1/Open System (1047 + Euro symbol)
20932	JIS X 0208-1990 & 0121-1990
20936	Simplified Chinese (GB2312)
21025	IBM EBCDIC - Cyrillic (Serbian, Bulgarian)
21027	Extended Alpha Lowercase
21866	Ukrainian (KOI8-U)
28591	ISO 8859-1 Latin I
28592	ISO 8859-2 Central Europe
28593	ISO 8859-3 Latin 3
28594	ISO 8859-4 Baltic
28595	ISO 8859-5 Cyrillic
28596	ISO 8859-6 Arabic
28597	ISO 8859-7 Greek
28598	ISO 8859-8 Hebrew
28599	ISO 8859-9 Latin 5
28605	ISO 8859-15 Latin 9
29001	Europa 3
38598	ISO 8859-8 Hebrew
50220	ISO 2022 Japanese with no halfwidth Katakana
50221	ISO 2022 Japanese with halfwidth Katakana
50222	ISO 2022 Japanese JIS X 0201-1989
50225	ISO 2022 Korean
50227	ISO 2022 Simplified Chinese
50229	ISO 2022 Traditional Chinese
50930	Japanese (Katakana) Extended
50931	US/Canada and Japanese
50933	Korean Extended and Korean
50935	Simplified Chinese Extended and Simplified Chinese
50936	Simplified Chinese
50937	US/Canada and Traditional Chinese
50939	Japanese (Latin) Extended and Japanese
51932	EUC - Japanese
51936	EUC - Simplified Chinese
51949	EUC - Korean
51950	EUC - Traditional Chinese
52936	HZ-GB2312 Simplified Chinese
54936	Windows XP: GB18030 Simplified Chinese (4 Byte)
57002	ISCII Devanagari
57003	ISCII Bengali
57004	ISCII Tamil
57005	ISCII Telugu
57006	ISCII Assamese
57007	ISCII Oriya
57008	ISCII Kannada
57009	ISCII Malayalam
57010	ISCII Gujarati
57011	ISCII Punjabi
65000	Unicode UTF-7
65001	Unicode UTF-8

The following is a list of valid code page identifiers for Mac OS only:


Identifier	Name
1	ASCII
2	NEXTSTEP
3	JapaneseEUC
4	UTF8
5	ISOLatin1
6	Symbol
7	NonLossyASCII
8	ShiftJIS
9	ISOLatin2
10	Unicode
11	WindowsCP1251
12	WindowsCP1252
13	WindowsCP1253
14	WindowsCP1254
15	WindowsCP1250
21	ISO2022JP
30	MacOSRoman
10	UTF16String
0x90000100	UTF16BigEndian
0x94000100	UTF16LittleEndian
0x8c000100	UTF32String
0x98000100	UTF32BigEndian
0x9c000100	UTF32LittleEndian
65536	Proprietary

LicenseInfo: Information about the current license.

When queried, this setting will return a string containing information about the license this instance of a component is using. It will return the following information:

Product: The product the license is for.
Product Key: The key the license was generated from.
License Source: Where the license was found (e.g., RuntimeLicense, License File).
License Type: The type of license installed (e.g., Royalty Free, Single Server).
Last Valid Build: The last valid build number for which the license will work.

MaskSensitive: Whether sensitive data is masked in log messages.

In certain circumstances it may be beneficial to mask sensitive data, like passwords, in log messages. Set this to True to mask sensitive data. The default is True.

This setting only works on these components: AS3Receiver, AS3Sender, Atom, Client(3DS), FTP, FTPServer, IMAP, OFTPClient, SSHClient, SCP, Server(3DS), Sexec, SFTP, SFTPServer, SSHServer, TCPClient, TCPServer.

UseInternalSecurityAPI: Whether or not to use the system security libraries or an internal implementation.

When set to False, the component will use the system security libraries by default to perform cryptographic functions where applicable.

Setting this configuration setting to True tells the component to use the internal implementation instead of using the system security libraries.

This setting is set to False by default on all platforms.

Trappable Errors (GRPC Component)

HTTP Errors


	118 Firewall Error. Error description contains detailed message.
	143 Busy executing current method.
	151 HTTP protocol error. The error message has the server response.
	152 No server specified in URL
	153 Specified URLScheme is invalid.
	155 Range operation is not supported by server.
	156 Invalid cookie index (out of range).
	301 Interrupted.
	302 Can't open AttachedFile.

The component may also return one of the following error codes, which are inherited from other components.

TCPClient Errors


	100 You cannot change the RemotePort at this time. A connection is in progress.
	101 You cannot change the RemoteHost (Server) at this time. A connection is in progress.
	102 The RemoteHost address is invalid (0.0.0.0).
	104 Already connected. If you want to reconnect, close the current connection first.
	106 You cannot change the LocalPort at this time. A connection is in progress.
	107 You cannot change the LocalHost at this time. A connection is in progress.
	112 You cannot change MaxLineLength at this time. A connection is in progress.
	116 RemotePort cannot be zero. Please specify a valid service port number.
	117 You cannot change the UseConnection option while the component is active.
	135 Operation would block.
	201 Timeout.
	211 Action impossible in control's present state.
	212 Action impossible while not connected.
	213 Action impossible while listening.
	301 Timeout.
	302 Could not open file.
	434 Unable to convert string to selected CodePage.
	1105 Already connecting. If you want to reconnect, close the current connection first.
	1117 You need to connect first.
	1119 You cannot change the LocalHost at this time. A connection is in progress.
	1120 Connection dropped by remote host.

SSL Errors


	270 Cannot load specified security library.
	271 Cannot open certificate store.
	272 Cannot find specified certificate.
	273 Cannot acquire security credentials.
	274 Cannot find certificate chain.
	275 Cannot verify certificate chain.
	276 Error during handshake.
	280 Error verifying certificate.
	281 Could not find client certificate.
	282 Could not find server certificate.
	283 Error encrypting data.
	284 Error decrypting data.

TCP/IP Errors


	10004 [10004] Interrupted system call.
	10009 [10009] Bad file number.
	10013 [10013] Access denied.
	10014 [10014] Bad address.
	10022 [10022] Invalid argument.
	10024 [10024] Too many open files.
	10035 [10035] Operation would block.
	10036 [10036] Operation now in progress.
	10037 [10037] Operation already in progress.
	10038 [10038] Socket operation on non-socket.
	10039 [10039] Destination address required.
	10040 [10040] Message too long.
	10041 [10041] Protocol wrong type for socket.
	10042 [10042] Bad protocol option.
	10043 [10043] Protocol not supported.
	10044 [10044] Socket type not supported.
	10045 [10045] Operation not supported on socket.
	10046 [10046] Protocol family not supported.
	10047 [10047] Address family not supported by protocol family.
	10048 [10048] Address already in use.
	10049 [10049] Can't assign requested address.
	10050 [10050] Network is down.
	10051 [10051] Network is unreachable.
	10052 [10052] Net dropped connection or reset.
	10053 [10053] Software caused connection abort.
	10054 [10054] Connection reset by peer.
	10055 [10055] No buffer space available.
	10056 [10056] Socket is already connected.
	10057 [10057] Socket is not connected.
	10058 [10058] Can't send after socket shutdown.
	10059 [10059] Too many references, can't splice.
	10060 [10060] Connection timed out.
	10061 [10061] Connection refused.
	10062 [10062] Too many levels of symbolic links.
	10063 [10063] File name too long.
	10064 [10064] Host is down.
	10065 [10065] No route to host.
	10066 [10066] Directory not empty
	10067 [10067] Too many processes.
	10068 [10068] Too many users.
	10069 [10069] Disc Quota Exceeded.
	10070 [10070] Stale NFS file handle.
	10071 [10071] Too many levels of remote in path.
	10091 [10091] Network subsystem is unavailable.
	10092 [10092] WINSOCK DLL Version out of range.
	10093 [10093] Winsock not loaded yet.
	11001 [11001] Host not found.
	11002 [11002] Non-authoritative 'Host not found' (try again or check DNS setup).
	11003 [11003] Non-recoverable errors: FORMERR, REFUSED, NOTIMP.
	11004 [11004] Valid name, no data record (check DNS setup).