GRPC Control

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

Syntax

GRPC

Remarks

The GRPC control 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 control supports both plaintext and Secure Sockets Layer/Transport Layer Security (SSL/TLS) connections. When connecting over Secure Sockets Layer/Transport Layer Security (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 through the Config method.

Reading a Message

The GRPC control 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:

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.

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 control 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 control with short descriptions. Click on the links for further details.

Method List

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

Event List

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

Config Settings

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

Authorization Property (GRPC Control)

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

Syntax

grpccontrol.Authorization[=string]

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.

Data Type

String

Connected Property (GRPC Control)

This property shows whether the control is connected.

Syntax

grpccontrol.Connected

Default Value

False

Remarks

This property indicates whether the control is connected to the remote host.

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

Data Type

Boolean

FirewallAutoDetect Property (GRPC Control)

Whether to automatically detect and use firewall system settings, if available.

Syntax

grpccontrol.FirewallAutoDetect[=boolean]

Default Value

False

Remarks

Whether to automatically detect and use firewall system settings, if available.

Data Type

Boolean

FirewallType Property (GRPC Control)

The type of firewall to connect through.

Syntax

grpccontrol.FirewallType[=integer]

Possible Values

fwNone(0), 
fwTunnel(1), 
fwSOCKS4(2), 
fwSOCKS5(3), 
fwSOCKS4A(10)

Default Value

0

Remarks

The type of firewall to connect through. The applicable values are as follows:

Data Type

Integer

FirewallHost Property (GRPC Control)

The name or IP address of the firewall (optional).

Syntax

grpccontrol.FirewallHost[=string]

Default Value

""

Remarks

The name or IP address of the firewall (optional). If a FirewallHost 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 control fails with an error.

Data Type

String

FirewallPassword Property (GRPC Control)

A password if authentication is to be used when connecting through the firewall.

Syntax

grpccontrol.FirewallPassword[=string]

Default Value

""

Remarks

A password if authentication is to be used when connecting through the firewall. If FirewallHost is specified, the FirewallUser and FirewallPassword properties are used to connect and authenticate to the given firewall. If the authentication fails, the control fails with an error.

Data Type

String

FirewallPort Property (GRPC Control)

The Transmission Control Protocol (TCP) port for the firewall Host .

Syntax

grpccontrol.FirewallPort[=integer]

Default Value

0

Remarks

The Transmission Control Protocol (TCP) port for the firewall FirewallHost. See the description of the FirewallHost 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.

Data Type

Integer

FirewallUser Property (GRPC Control)

A username if authentication is to be used when connecting through a firewall.

Syntax

grpccontrol.FirewallUser[=string]

Default Value

""

Remarks

A username if authentication is to be used when connecting through a firewall. If FirewallHost is specified, this property and the FirewallPassword property are used to connect and authenticate to the given Firewall. If the authentication fails, the control fails with an error.

Data Type

String

FollowRedirects Property (GRPC Control)

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

Syntax

grpccontrol.FollowRedirects[=integer]

Possible Values

frNever(0), 
frAlways(1), 
frSameScheme(2)

Default Value

0

Remarks

This property determines what happens when the server issues a redirect. Normally, the control 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 control fails with an error instead.

Data Type

Integer

GRPCTimeout Property (GRPC Control)

The gRPC timeout.

Syntax

grpccontrol.GRPCTimeout[=integer]

Default Value

0

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.

Data Type

Integer

Idle Property (GRPC Control)

The current status of the control.

Syntax

grpccontrol.Idle

Default Value

True

Remarks

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

This property is read-only.

Data Type

Boolean

MessageData Property (GRPC Control)

This property contains the message in a raw format.

Syntax

grpccontrol.MessageData[=string]

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.

To read or write binary data to the property, a Variant (Byte Array) version is provided in .MessageDataB.

Data Type

Binary String

OtherHeaders Property (GRPC Control)

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

Syntax

grpccontrol.OtherHeaders[=string]

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 (Chr$(13) & Chr$(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 control beyond what is provided.

This property is not available at design time.

Data Type

String

ParsedHeaderCount Property (GRPC Control)

The number of records in the ParsedHeader arrays.

Syntax

grpccontrol.ParsedHeaderCount

Default Value

0

Remarks

This property controls the size of the following arrays:

• ParsedHeaderField
• ParsedHeaderValue

The array indices start at 0 and end at ParsedHeaderCount - 1.

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

Data Type

Integer

ParsedHeaderField Property (GRPC Control)

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

Syntax

grpccontrol.ParsedHeaderField(ParsedHeaderIndex)

Default Value

""

Remarks

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

The ParsedHeaderIndex parameter specifies the index of the item in the array. The size of the array is controlled by the ParsedHeaderCount property.

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

Data Type

String

ParsedHeaderValue Property (GRPC Control)

This property contains the header contents.

Syntax

grpccontrol.ParsedHeaderValue(ParsedHeaderIndex)

Default Value

""

Remarks

This property contains the Header contents.

The ParsedHeaderIndex parameter specifies the index of the item in the array. The size of the array is controlled by the ParsedHeaderCount property.

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

Data Type

String

ProxyAuthScheme Property (GRPC Control)

The type of authorization to perform when connecting to the proxy.

Syntax

grpccontrol.ProxyAuthScheme[=integer]

Possible Values

authBasic(0), 
authDigest(1), 
authProprietary(2), 
authNone(3), 
authNtlm(4), 
authNegotiate(5)

Default Value

0

Remarks

The type of authorization to perform when connecting to the proxy. This is used only when the ProxyUser and ProxyPassword properties are set.

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

By default, ProxyAuthScheme is authBasic (0), and if the ProxyUser and ProxyPassword properties are set, the control will attempt basic authentication.

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

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

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

For security reasons, setting this property will clear the values of ProxyUser and ProxyPassword.

Data Type

Integer

ProxyAutoDetect Property (GRPC Control)

Whether to automatically detect and use proxy system settings, if available.

Syntax

grpccontrol.ProxyAutoDetect[=boolean]

Default Value

False

Remarks

Whether to automatically detect and use proxy system settings, if available. The default value is False.

Data Type

Boolean

ProxyPassword Property (GRPC Control)

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

Syntax

grpccontrol.ProxyPassword[=string]

Default Value

""

Remarks

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

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

If ProxyAuthScheme is set to Digest Authentication, the ProxyUser and ProxyPassword properties are used to respond to the Digest Authentication challenge from the server.

If ProxyAuthScheme is set to NTLM Authentication, the ProxyUser and ProxyPassword properties are used to authenticate through NTLM negotiation.

Data Type

String

ProxyPort Property (GRPC Control)

The Transmission Control Protocol (TCP) port for the proxy Server (default 80).

Syntax

grpccontrol.ProxyPort[=integer]

Default Value

80

Remarks

The Transmission Control Protocol (TCP) port for the proxy ProxyServer (default 80). See the description of the ProxyServer property for details.

Data Type

Integer

ProxyServer Property (GRPC Control)

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

Syntax

grpccontrol.ProxyServer[=string]

Default Value

""

Remarks

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

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

Data Type

String

ProxySSL Property (GRPC Control)

When to use a Secure Sockets Layer (SSL) for the connection to the proxy.

Syntax

grpccontrol.ProxySSL[=integer]

Possible Values

psAutomatic(0), 
psAlways(1), 
psNever(2), 
psTunnel(3)

Default Value

0

Remarks

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

Data Type

Integer

ProxyUser Property (GRPC Control)

A username if authentication is to be used for the proxy.

Syntax

grpccontrol.ProxyUser[=string]

Default Value

""

Remarks

A username if authentication is to be used for the proxy.

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

If ProxyAuthScheme is set to Digest Authentication, the ProxyUser and ProxyPassword properties are used to respond to the Digest Authentication challenge from the server.

If ProxyAuthScheme is set to NTLM Authentication, the ProxyUser and ProxyPassword properties are used to authenticate through NTLM negotiation.

Data Type

String

SSLAcceptServerCertEffectiveDate Property (GRPC Control)

The date on which this certificate becomes valid.

Syntax

grpccontrol.SSLAcceptServerCertEffectiveDate

Default Value

""

Remarks

The date on which this certificate becomes valid. Before this date, it is not valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:

23-Jan-2000 15:00:00.

This property is read-only.

Data Type

String

SSLAcceptServerCertExpirationDate Property (GRPC Control)

The date on which the certificate expires.

Syntax

grpccontrol.SSLAcceptServerCertExpirationDate

Default Value

""

Remarks

The date on which the certificate expires. After this date, the certificate will no longer be valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:

23-Jan-2001 15:00:00.

This property is read-only.

Data Type

String

SSLAcceptServerCertExtendedKeyUsage Property (GRPC Control)

A comma-delimited list of extended key usage identifiers.

Syntax

grpccontrol.SSLAcceptServerCertExtendedKeyUsage

Default Value

""

Remarks

A comma-delimited list of extended key usage identifiers. These are the same as ASN.1 object identifiers (OIDs).

This property is read-only.

Data Type

String

SSLAcceptServerCertFingerprint Property (GRPC Control)

The hex-encoded, 16-byte MD5 fingerprint of the certificate.

Syntax

grpccontrol.SSLAcceptServerCertFingerprint

Default Value

""

Remarks

The hex-encoded, 16-byte MD5 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: bc:2a:72:af:fe:58:17:43:7a:5f:ba:5a:7c:90:f7:02

This property is read-only.

Data Type

String

SSLAcceptServerCertFingerprintSHA1 Property (GRPC Control)

The hex-encoded, 20-byte SHA-1 fingerprint of the certificate.

Syntax

grpccontrol.SSLAcceptServerCertFingerprintSHA1

Default Value

""

Remarks

The hex-encoded, 20-byte SHA-1 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: 30:7b:fa:38:65:83:ff:da:b4:4e:07:3f:17:b8:a4:ed:80:be:ff:84

This property is read-only.

Data Type

String

SSLAcceptServerCertFingerprintSHA256 Property (GRPC Control)

The hex-encoded, 32-byte SHA-256 fingerprint of the certificate.

Syntax

grpccontrol.SSLAcceptServerCertFingerprintSHA256

Default Value

""

Remarks

The hex-encoded, 32-byte SHA-256 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: 6a:80:5c:33:a9:43:ea:b0:96:12:8a:64:96:30:ef:4a:8a:96:86:ce:f4:c7:be:10:24:8e:2b:60:9e:f3:59:53

This property is read-only.

Data Type

String

SSLAcceptServerCertIssuer Property (GRPC Control)

The issuer of the certificate.

Syntax

grpccontrol.SSLAcceptServerCertIssuer

Default Value

""

Remarks

The issuer of the certificate. This property contains a string representation of the name of the issuing authority for the certificate.

This property is read-only.

Data Type

String

SSLAcceptServerCertPrivateKey Property (GRPC Control)

The private key of the certificate (if available).

Syntax

grpccontrol.SSLAcceptServerCertPrivateKey

Default Value

""

Remarks

The private key of the certificate (if available). The key is provided as PEM/Base64-encoded data.

NOTE: The SSLAcceptServerCertPrivateKey may be available but not exportable. In this case, SSLAcceptServerCertPrivateKey returns an empty string.

This property is read-only.

Data Type

String

SSLAcceptServerCertPrivateKeyAvailable Property (GRPC Control)

Whether a PrivateKey is available for the selected certificate.

Syntax

grpccontrol.SSLAcceptServerCertPrivateKeyAvailable

Default Value

False

Remarks

Whether a SSLAcceptServerCertPrivateKey is available for the selected certificate. If SSLAcceptServerCertPrivateKeyAvailable is True, the certificate may be used for authentication purposes (e.g., server authentication).

This property is read-only.

Data Type

Boolean

SSLAcceptServerCertPrivateKeyContainer Property (GRPC Control)

The name of the PrivateKey container for the certificate (if available).

Syntax

grpccontrol.SSLAcceptServerCertPrivateKeyContainer

Default Value

""

Remarks

The name of the SSLAcceptServerCertPrivateKey container for the certificate (if available). This functionality is available only on Windows platforms.

This property is read-only.

Data Type

String

SSLAcceptServerCertPublicKey Property (GRPC Control)

The public key of the certificate.

Syntax

grpccontrol.SSLAcceptServerCertPublicKey

Default Value

""

Remarks

The public key of the certificate. The key is provided as PEM/Base64-encoded data.

This property is read-only.

Data Type

String

SSLAcceptServerCertPublicKeyAlgorithm Property (GRPC Control)

The textual description of the certificate's public key algorithm.

Syntax

grpccontrol.SSLAcceptServerCertPublicKeyAlgorithm

Default Value

""

Remarks

The textual description of the certificate's public key algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_DH") or an object identifier (OID) string representing the algorithm.

This property is read-only.

Data Type

String

SSLAcceptServerCertPublicKeyLength Property (GRPC Control)

The length of the certificate's public key (in bits).

Syntax

grpccontrol.SSLAcceptServerCertPublicKeyLength

Default Value

0

Remarks

The length of the certificate's public key (in bits). Common values are 512, 1024, and 2048.

This property is read-only.

Data Type

Integer

SSLAcceptServerCertSerialNumber Property (GRPC Control)

The serial number of the certificate encoded as a string.

Syntax

grpccontrol.SSLAcceptServerCertSerialNumber

Default Value

""

Remarks

The serial number of the certificate encoded as a string. The number is encoded as a series of hexadecimal digits, with each pair representing a byte of the serial number.

This property is read-only.

Data Type

String

SSLAcceptServerCertSignatureAlgorithm Property (GRPC Control)

The text description of the certificate's signature algorithm.

Syntax

grpccontrol.SSLAcceptServerCertSignatureAlgorithm

Default Value

""

Remarks

The text description of the certificate's signature algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_MD5RSA") or an object identifier (OID) string representing the algorithm.

This property is read-only.

Data Type

String

SSLAcceptServerCertStore Property (GRPC Control)

The name of the certificate store for the client certificate.

Syntax

grpccontrol.SSLAcceptServerCertStore[=string]

Default Value

"MY"

Remarks

The name of the certificate store for the client certificate.

The SSLAcceptServerCertStoreType property denotes the type of the certificate store specified by SSLAcceptServerCertStore. If the store is password-protected, specify the password in SSLAcceptServerCertStorePassword.

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

Designations of certificate stores are platform dependent.

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

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

To read or write binary data to the property, a Variant (Byte Array) version is provided in .SSLAcceptServerCertStoreB.

Data Type

Binary String

SSLAcceptServerCertStorePassword Property (GRPC Control)

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

Syntax

grpccontrol.SSLAcceptServerCertStorePassword[=string]

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.

Data Type

String

SSLAcceptServerCertStoreType Property (GRPC Control)

The type of certificate store for this certificate.

Syntax

grpccontrol.SSLAcceptServerCertStoreType[=integer]

Possible Values

cstUser(0), 
cstMachine(1), 
cstPFXFile(2), 
cstPFXBlob(3), 
cstJKSFile(4), 
cstJKSBlob(5), 
cstPEMKeyFile(6), 
cstPEMKeyBlob(7), 
cstPublicKeyFile(8), 
cstPublicKeyBlob(9), 
cstSSHPublicKeyBlob(10), 
cstP7BFile(11), 
cstP7BBlob(12), 
cstSSHPublicKeyFile(13), 
cstPPKFile(14), 
cstPPKBlob(15), 
cstXMLFile(16), 
cstXMLBlob(17), 
cstJWKFile(18), 
cstJWKBlob(19), 
cstSecurityKey(20), 
cstBCFKSFile(21), 
cstBCFKSBlob(22), 
cstPKCS11(23), 
cstAuto(99)

Default Value

0

Remarks

The type of certificate store for this certificate.

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

Data Type

Integer

SSLAcceptServerCertSubjectAltNames Property (GRPC Control)

Comma-separated lists of alternative subject names for the certificate.

Syntax

grpccontrol.SSLAcceptServerCertSubjectAltNames

Default Value

""

Remarks

Comma-separated lists of alternative subject names for the certificate.

This property is read-only.

Data Type

String

SSLAcceptServerCertThumbprintMD5 Property (GRPC Control)

The MD5 hash of the certificate.

Syntax

grpccontrol.SSLAcceptServerCertThumbprintMD5

Default Value

""

Remarks

The MD5 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

Data Type

String

SSLAcceptServerCertThumbprintSHA1 Property (GRPC Control)

The SHA-1 hash of the certificate.

Syntax

grpccontrol.SSLAcceptServerCertThumbprintSHA1

Default Value

""

Remarks

The SHA-1 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

Data Type

String

SSLAcceptServerCertThumbprintSHA256 Property (GRPC Control)

The SHA-256 hash of the certificate.

Syntax

grpccontrol.SSLAcceptServerCertThumbprintSHA256

Default Value

""

Remarks

The SHA-256 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

Data Type

String

SSLAcceptServerCertUsage Property (GRPC Control)

The text description of UsageFlags .

Syntax

grpccontrol.SSLAcceptServerCertUsage

Default Value

""

Remarks

The text description of SSLAcceptServerCertUsageFlags.

This value will be one or more of the following strings and will be separated by commas:

• Digital Signature
• Non-Repudiation
• Key Encipherment
• Data Encipherment
• Key Agreement
• Certificate Signing
• CRL Signing
• Encipher Only

If the provider is OpenSSL, the value is a comma-separated list of X.509 certificate extension names.

This property is read-only.

Data Type

String

SSLAcceptServerCertUsageFlags Property (GRPC Control)

The flags that show intended use for the certificate.

Syntax

grpccontrol.SSLAcceptServerCertUsageFlags

Default Value

0

Remarks

The flags that show intended use for the certificate. The value of SSLAcceptServerCertUsageFlags is a combination of the following flags:

Please see the SSLAcceptServerCertUsage property for a text representation of SSLAcceptServerCertUsageFlags.

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

This property is read-only.

Data Type

Integer

SSLAcceptServerCertVersion Property (GRPC Control)

The certificate's version number.

Syntax

grpccontrol.SSLAcceptServerCertVersion

Default Value

""

Remarks

The certificate's version number. The possible values are the strings "V1", "V2", and "V3".

This property is read-only.

Data Type

String

SSLAcceptServerCertSubject Property (GRPC Control)

The subject of the certificate used for client authentication.

Syntax

grpccontrol.SSLAcceptServerCertSubject[=string]

Default Value

""

Remarks

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=example@email.com". Common fields and their meanings are as follows:

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

Data Type

String

SSLAcceptServerCertEncoded Property (GRPC Control)

The certificate (PEM/Base64 encoded).

Syntax

grpccontrol.SSLAcceptServerCertEncoded[=string]

Default Value

""

Remarks

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

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

To read or write binary data to the property, a Variant (Byte Array) version is provided in .SSLAcceptServerCertEncodedB.

This property is not available at design time.

Data Type

Binary String

SSLCertEffectiveDate Property (GRPC Control)

The date on which this certificate becomes valid.

Syntax

grpccontrol.SSLCertEffectiveDate

Default Value

""

Remarks

The date on which this certificate becomes valid. Before this date, it is not valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:

23-Jan-2000 15:00:00.

This property is read-only.

Data Type

String

SSLCertExpirationDate Property (GRPC Control)

The date on which the certificate expires.

Syntax

grpccontrol.SSLCertExpirationDate

Default Value

""

Remarks

The date on which the certificate expires. After this date, the certificate will no longer be valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:

23-Jan-2001 15:00:00.

This property is read-only.

Data Type

String

SSLCertExtendedKeyUsage Property (GRPC Control)

A comma-delimited list of extended key usage identifiers.

Syntax

grpccontrol.SSLCertExtendedKeyUsage

Default Value

""

Remarks

A comma-delimited list of extended key usage identifiers. These are the same as ASN.1 object identifiers (OIDs).

This property is read-only.

Data Type

String

SSLCertFingerprint Property (GRPC Control)

The hex-encoded, 16-byte MD5 fingerprint of the certificate.

Syntax

grpccontrol.SSLCertFingerprint

Default Value

""

Remarks

The hex-encoded, 16-byte MD5 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: bc:2a:72:af:fe:58:17:43:7a:5f:ba:5a:7c:90:f7:02

This property is read-only.

Data Type

String

SSLCertFingerprintSHA1 Property (GRPC Control)

The hex-encoded, 20-byte SHA-1 fingerprint of the certificate.

Syntax

grpccontrol.SSLCertFingerprintSHA1

Default Value

""

Remarks

The hex-encoded, 20-byte SHA-1 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: 30:7b:fa:38:65:83:ff:da:b4:4e:07:3f:17:b8:a4:ed:80:be:ff:84

This property is read-only.

Data Type

String

SSLCertFingerprintSHA256 Property (GRPC Control)

The hex-encoded, 32-byte SHA-256 fingerprint of the certificate.

Syntax

grpccontrol.SSLCertFingerprintSHA256

Default Value

""

Remarks

The hex-encoded, 32-byte SHA-256 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: 6a:80:5c:33:a9:43:ea:b0:96:12:8a:64:96:30:ef:4a:8a:96:86:ce:f4:c7:be:10:24:8e:2b:60:9e:f3:59:53

This property is read-only.

Data Type

String

SSLCertIssuer Property (GRPC Control)

The issuer of the certificate.

Syntax

grpccontrol.SSLCertIssuer

Default Value

""

Remarks

The issuer of the certificate. This property contains a string representation of the name of the issuing authority for the certificate.

This property is read-only.

Data Type

String

SSLCertPrivateKey Property (GRPC Control)

The private key of the certificate (if available).

Syntax

grpccontrol.SSLCertPrivateKey

Default Value

""

Remarks

The private key of the certificate (if available). The key is provided as PEM/Base64-encoded data.

NOTE: The SSLCertPrivateKey may be available but not exportable. In this case, SSLCertPrivateKey returns an empty string.

This property is read-only.

Data Type

String

SSLCertPrivateKeyAvailable Property (GRPC Control)

Whether a PrivateKey is available for the selected certificate.

Syntax

grpccontrol.SSLCertPrivateKeyAvailable

Default Value

False

Remarks

Whether a SSLCertPrivateKey is available for the selected certificate. If SSLCertPrivateKeyAvailable is True, the certificate may be used for authentication purposes (e.g., server authentication).

This property is read-only.

Data Type

Boolean

SSLCertPrivateKeyContainer Property (GRPC Control)

The name of the PrivateKey container for the certificate (if available).

Syntax

grpccontrol.SSLCertPrivateKeyContainer

Default Value

""

Remarks

The name of the SSLCertPrivateKey container for the certificate (if available). This functionality is available only on Windows platforms.

This property is read-only.

Data Type

String

SSLCertPublicKey Property (GRPC Control)

The public key of the certificate.

Syntax

grpccontrol.SSLCertPublicKey

Default Value

""

Remarks

The public key of the certificate. The key is provided as PEM/Base64-encoded data.

This property is read-only.

Data Type

String

SSLCertPublicKeyAlgorithm Property (GRPC Control)

The textual description of the certificate's public key algorithm.

Syntax

grpccontrol.SSLCertPublicKeyAlgorithm

Default Value

""

Remarks

The textual description of the certificate's public key algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_DH") or an object identifier (OID) string representing the algorithm.

This property is read-only.

Data Type

String

SSLCertPublicKeyLength Property (GRPC Control)

The length of the certificate's public key (in bits).

Syntax

grpccontrol.SSLCertPublicKeyLength

Default Value

0

Remarks

The length of the certificate's public key (in bits). Common values are 512, 1024, and 2048.

This property is read-only.

Data Type

Integer

SSLCertSerialNumber Property (GRPC Control)

The serial number of the certificate encoded as a string.

Syntax

grpccontrol.SSLCertSerialNumber

Default Value

""

Remarks

The serial number of the certificate encoded as a string. The number is encoded as a series of hexadecimal digits, with each pair representing a byte of the serial number.

This property is read-only.

Data Type

String

SSLCertSignatureAlgorithm Property (GRPC Control)

The text description of the certificate's signature algorithm.

Syntax

grpccontrol.SSLCertSignatureAlgorithm

Default Value

""

Remarks

The text description of the certificate's signature algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_MD5RSA") or an object identifier (OID) string representing the algorithm.

This property is read-only.

Data Type

String

SSLCertStore Property (GRPC Control)

The name of the certificate store for the client certificate.

Syntax

grpccontrol.SSLCertStore[=string]

Default Value

"MY"

Remarks

The name of the certificate store for the client certificate.

The SSLCertStoreType property denotes the type of the certificate store specified by SSLCertStore. If the store is password-protected, specify the password in SSLCertStorePassword.

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

Designations of certificate stores are platform dependent.

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

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

To read or write binary data to the property, a Variant (Byte Array) version is provided in .SSLCertStoreB.

Data Type

Binary String

SSLCertStorePassword Property (GRPC Control)

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

Syntax

grpccontrol.SSLCertStorePassword[=string]

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.

Data Type

String

SSLCertStoreType Property (GRPC Control)

The type of certificate store for this certificate.

Syntax

grpccontrol.SSLCertStoreType[=integer]

Possible Values

cstUser(0), 
cstMachine(1), 
cstPFXFile(2), 
cstPFXBlob(3), 
cstJKSFile(4), 
cstJKSBlob(5), 
cstPEMKeyFile(6), 
cstPEMKeyBlob(7), 
cstPublicKeyFile(8), 
cstPublicKeyBlob(9), 
cstSSHPublicKeyBlob(10), 
cstP7BFile(11), 
cstP7BBlob(12), 
cstSSHPublicKeyFile(13), 
cstPPKFile(14), 
cstPPKBlob(15), 
cstXMLFile(16), 
cstXMLBlob(17), 
cstJWKFile(18), 
cstJWKBlob(19), 
cstSecurityKey(20), 
cstBCFKSFile(21), 
cstBCFKSBlob(22), 
cstPKCS11(23), 
cstAuto(99)

Default Value

0

Remarks

The type of certificate store for this certificate.

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

Data Type

Integer

SSLCertSubjectAltNames Property (GRPC Control)

Comma-separated lists of alternative subject names for the certificate.

Syntax

grpccontrol.SSLCertSubjectAltNames

Default Value

""

Remarks

Comma-separated lists of alternative subject names for the certificate.

This property is read-only.

Data Type

String

SSLCertThumbprintMD5 Property (GRPC Control)

The MD5 hash of the certificate.

Syntax

grpccontrol.SSLCertThumbprintMD5

Default Value

""

Remarks

The MD5 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

Data Type

String

SSLCertThumbprintSHA1 Property (GRPC Control)

The SHA-1 hash of the certificate.

Syntax

grpccontrol.SSLCertThumbprintSHA1

Default Value

""

Remarks

The SHA-1 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

Data Type

String

SSLCertThumbprintSHA256 Property (GRPC Control)

The SHA-256 hash of the certificate.

Syntax

grpccontrol.SSLCertThumbprintSHA256

Default Value

""

Remarks

The SHA-256 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

Data Type

String

SSLCertUsage Property (GRPC Control)

The text description of UsageFlags .

Syntax

grpccontrol.SSLCertUsage

Default Value

""

Remarks

The text description of SSLCertUsageFlags.

This value will be one or more of the following strings and will be separated by commas:

• Digital Signature
• Non-Repudiation
• Key Encipherment
• Data Encipherment
• Key Agreement
• Certificate Signing
• CRL Signing
• Encipher Only

If the provider is OpenSSL, the value is a comma-separated list of X.509 certificate extension names.

This property is read-only.

Data Type

String

SSLCertUsageFlags Property (GRPC Control)

The flags that show intended use for the certificate.

Syntax

grpccontrol.SSLCertUsageFlags

Default Value

0

Remarks

The flags that show intended use for the certificate. The value of SSLCertUsageFlags is a combination of the following flags:

Please see the SSLCertUsage property for a text representation of SSLCertUsageFlags.

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

This property is read-only.

Data Type

Integer

SSLCertVersion Property (GRPC Control)

The certificate's version number.

Syntax

grpccontrol.SSLCertVersion

Default Value

""

Remarks

The certificate's version number. The possible values are the strings "V1", "V2", and "V3".

This property is read-only.

Data Type

String

SSLCertSubject Property (GRPC Control)

The subject of the certificate used for client authentication.

Syntax

grpccontrol.SSLCertSubject[=string]

Default Value

""

Remarks

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=example@email.com". Common fields and their meanings are as follows:

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

Data Type

String

SSLCertEncoded Property (GRPC Control)

The certificate (PEM/Base64 encoded).

Syntax

grpccontrol.SSLCertEncoded[=string]

Default Value

""

Remarks

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

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

To read or write binary data to the property, a Variant (Byte Array) version is provided in .SSLCertEncodedB.

This property is not available at design time.

Data Type

Binary String

SSLProvider Property (GRPC Control)

The Secure Sockets Layer/Transport Layer Security (SSL/TLS) implementation to use.

Syntax

grpccontrol.SSLProvider[=integer]

Possible Values

sslpAutomatic(0), 
sslpPlatform(1), 
sslpInternal(2)

Default Value

0

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 control 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 as follows:

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

When Automatic is selected, the platform implementation is used by default. When TLS 1.3 is enabled via SSLEnabledProtocols, the control will always try and use the platform implementation. If the platform TLS 1.3 implementation is not available, the internal implementation will be used.

Data Type

Integer

SSLServerCertEffectiveDate Property (GRPC Control)

The date on which this certificate becomes valid.

Syntax

grpccontrol.SSLServerCertEffectiveDate

Default Value

""

Remarks

The date on which this certificate becomes valid. Before this date, it is not valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:

23-Jan-2000 15:00:00.

This property is read-only.

Data Type

String

SSLServerCertExpirationDate Property (GRPC Control)

The date on which the certificate expires.

Syntax

grpccontrol.SSLServerCertExpirationDate

Default Value

""

Remarks

The date on which the certificate expires. After this date, the certificate will no longer be valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:

23-Jan-2001 15:00:00.

This property is read-only.

Data Type

String

SSLServerCertExtendedKeyUsage Property (GRPC Control)

A comma-delimited list of extended key usage identifiers.

Syntax

grpccontrol.SSLServerCertExtendedKeyUsage

Default Value

""

Remarks

A comma-delimited list of extended key usage identifiers. These are the same as ASN.1 object identifiers (OIDs).

This property is read-only.

Data Type

String

SSLServerCertFingerprint Property (GRPC Control)

The hex-encoded, 16-byte MD5 fingerprint of the certificate.

Syntax

grpccontrol.SSLServerCertFingerprint

Default Value

""

Remarks

The hex-encoded, 16-byte MD5 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: bc:2a:72:af:fe:58:17:43:7a:5f:ba:5a:7c:90:f7:02

This property is read-only.

Data Type

String

SSLServerCertFingerprintSHA1 Property (GRPC Control)

The hex-encoded, 20-byte SHA-1 fingerprint of the certificate.

Syntax

grpccontrol.SSLServerCertFingerprintSHA1

Default Value

""

Remarks

The hex-encoded, 20-byte SHA-1 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: 30:7b:fa:38:65:83:ff:da:b4:4e:07:3f:17:b8:a4:ed:80:be:ff:84

This property is read-only.

Data Type

String

SSLServerCertFingerprintSHA256 Property (GRPC Control)

The hex-encoded, 32-byte SHA-256 fingerprint of the certificate.

Syntax

grpccontrol.SSLServerCertFingerprintSHA256

Default Value

""

Remarks

The hex-encoded, 32-byte SHA-256 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: 6a:80:5c:33:a9:43:ea:b0:96:12:8a:64:96:30:ef:4a:8a:96:86:ce:f4:c7:be:10:24:8e:2b:60:9e:f3:59:53

This property is read-only.

Data Type

String

SSLServerCertIssuer Property (GRPC Control)

The issuer of the certificate.

Syntax

grpccontrol.SSLServerCertIssuer

Default Value

""

Remarks

The issuer of the certificate. This property contains a string representation of the name of the issuing authority for the certificate.

This property is read-only.

Data Type

String

SSLServerCertPrivateKey Property (GRPC Control)

The private key of the certificate (if available).

Syntax

grpccontrol.SSLServerCertPrivateKey

Default Value

""

Remarks

The private key of the certificate (if available). The key is provided as PEM/Base64-encoded data.

NOTE: The SSLServerCertPrivateKey may be available but not exportable. In this case, SSLServerCertPrivateKey returns an empty string.

This property is read-only.

Data Type

String

SSLServerCertPrivateKeyAvailable Property (GRPC Control)

Whether a PrivateKey is available for the selected certificate.

Syntax

grpccontrol.SSLServerCertPrivateKeyAvailable

Default Value

False

Remarks

Whether a SSLServerCertPrivateKey is available for the selected certificate. If SSLServerCertPrivateKeyAvailable is True, the certificate may be used for authentication purposes (e.g., server authentication).

This property is read-only.

Data Type

Boolean

SSLServerCertPrivateKeyContainer Property (GRPC Control)

The name of the PrivateKey container for the certificate (if available).

Syntax

grpccontrol.SSLServerCertPrivateKeyContainer

Default Value

""

Remarks

The name of the SSLServerCertPrivateKey container for the certificate (if available). This functionality is available only on Windows platforms.

This property is read-only.

Data Type

String

SSLServerCertPublicKey Property (GRPC Control)

The public key of the certificate.

Syntax

grpccontrol.SSLServerCertPublicKey

Default Value

""

Remarks

The public key of the certificate. The key is provided as PEM/Base64-encoded data.

This property is read-only.

Data Type

String

SSLServerCertPublicKeyAlgorithm Property (GRPC Control)

The textual description of the certificate's public key algorithm.

Syntax

grpccontrol.SSLServerCertPublicKeyAlgorithm

Default Value

""

Remarks

The textual description of the certificate's public key algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_DH") or an object identifier (OID) string representing the algorithm.

This property is read-only.

Data Type

String

SSLServerCertPublicKeyLength Property (GRPC Control)

The length of the certificate's public key (in bits).

Syntax

grpccontrol.SSLServerCertPublicKeyLength

Default Value

0

Remarks

The length of the certificate's public key (in bits). Common values are 512, 1024, and 2048.

This property is read-only.

Data Type

Integer

SSLServerCertSerialNumber Property (GRPC Control)

The serial number of the certificate encoded as a string.

Syntax

grpccontrol.SSLServerCertSerialNumber

Default Value

""

Remarks

The serial number of the certificate encoded as a string. The number is encoded as a series of hexadecimal digits, with each pair representing a byte of the serial number.

This property is read-only.

Data Type

String

SSLServerCertSignatureAlgorithm Property (GRPC Control)

The text description of the certificate's signature algorithm.

Syntax

grpccontrol.SSLServerCertSignatureAlgorithm

Default Value

""

Remarks

The text description of the certificate's signature algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_MD5RSA") or an object identifier (OID) string representing the algorithm.

This property is read-only.

Data Type

String

SSLServerCertStore Property (GRPC Control)

The name of the certificate store for the client certificate.

Syntax

grpccontrol.SSLServerCertStore

Default Value

"MY"

Remarks

The name of the certificate store for the client certificate.

The SSLServerCertStoreType property denotes the type of the certificate store specified by SSLServerCertStore. If the store is password-protected, specify the password in SSLServerCertStorePassword.

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

Designations of certificate stores are platform dependent.

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

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

To read or write binary data to the property, a Variant (Byte Array) version is provided in .SSLServerCertStoreB.

This property is read-only.

Data Type

Binary String

SSLServerCertStorePassword Property (GRPC Control)

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

Syntax

grpccontrol.SSLServerCertStorePassword

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.

This property is read-only.

Data Type

String

SSLServerCertStoreType Property (GRPC Control)

The type of certificate store for this certificate.

Syntax

grpccontrol.SSLServerCertStoreType

Possible Values

cstUser(0), 
cstMachine(1), 
cstPFXFile(2), 
cstPFXBlob(3), 
cstJKSFile(4), 
cstJKSBlob(5), 
cstPEMKeyFile(6), 
cstPEMKeyBlob(7), 
cstPublicKeyFile(8), 
cstPublicKeyBlob(9), 
cstSSHPublicKeyBlob(10), 
cstP7BFile(11), 
cstP7BBlob(12), 
cstSSHPublicKeyFile(13), 
cstPPKFile(14), 
cstPPKBlob(15), 
cstXMLFile(16), 
cstXMLBlob(17), 
cstJWKFile(18), 
cstJWKBlob(19), 
cstSecurityKey(20), 
cstBCFKSFile(21), 
cstBCFKSBlob(22), 
cstPKCS11(23), 
cstAuto(99)

Default Value

0

Remarks

The type of certificate store for this certificate.

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

This property is read-only.

Data Type

Integer

SSLServerCertSubjectAltNames Property (GRPC Control)

Comma-separated lists of alternative subject names for the certificate.

Syntax

grpccontrol.SSLServerCertSubjectAltNames

Default Value

""

Remarks

Comma-separated lists of alternative subject names for the certificate.

This property is read-only.

Data Type

String

SSLServerCertThumbprintMD5 Property (GRPC Control)

The MD5 hash of the certificate.

Syntax

grpccontrol.SSLServerCertThumbprintMD5

Default Value

""

Remarks

The MD5 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

Data Type

String

SSLServerCertThumbprintSHA1 Property (GRPC Control)

The SHA-1 hash of the certificate.

Syntax

grpccontrol.SSLServerCertThumbprintSHA1

Default Value

""

Remarks

The SHA-1 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

Data Type

String

SSLServerCertThumbprintSHA256 Property (GRPC Control)

The SHA-256 hash of the certificate.

Syntax

grpccontrol.SSLServerCertThumbprintSHA256

Default Value

""

Remarks

The SHA-256 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

Data Type

String

SSLServerCertUsage Property (GRPC Control)

The text description of UsageFlags .

Syntax

grpccontrol.SSLServerCertUsage

Default Value

""

Remarks

The text description of SSLServerCertUsageFlags.

This value will be one or more of the following strings and will be separated by commas:

• Digital Signature
• Non-Repudiation
• Key Encipherment
• Data Encipherment
• Key Agreement
• Certificate Signing
• CRL Signing
• Encipher Only

If the provider is OpenSSL, the value is a comma-separated list of X.509 certificate extension names.

This property is read-only.

Data Type

String

SSLServerCertUsageFlags Property (GRPC Control)

The flags that show intended use for the certificate.

Syntax

grpccontrol.SSLServerCertUsageFlags

Default Value

0

Remarks

The flags that show intended use for the certificate. The value of SSLServerCertUsageFlags is a combination of the following flags:

Please see the SSLServerCertUsage property for a text representation of SSLServerCertUsageFlags.

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

This property is read-only.

Data Type

Integer

SSLServerCertVersion Property (GRPC Control)

The certificate's version number.

Syntax

grpccontrol.SSLServerCertVersion

Default Value

""

Remarks

The certificate's version number. The possible values are the strings "V1", "V2", and "V3".

This property is read-only.

Data Type

String

SSLServerCertSubject Property (GRPC Control)

The subject of the certificate used for client authentication.

Syntax

grpccontrol.SSLServerCertSubject

Default Value

""

Remarks

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=example@email.com". Common fields and their meanings are as follows:

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

This property is read-only.

Data Type

String

SSLServerCertEncoded Property (GRPC Control)

The certificate (PEM/Base64 encoded).

Syntax

grpccontrol.SSLServerCertEncoded

Default Value

""

Remarks

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

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

To read or write binary data to the property, a Variant (Byte Array) version is provided in .SSLServerCertEncodedB.

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

Data Type

Binary String

Status Property (GRPC Control)

This property includes the gRPC status code.

Syntax

grpccontrol.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.

Data Type

String

StatusDescription Property (GRPC Control)

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

Syntax

grpccontrol.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.

Data Type

String

StatusLine Property (GRPC Control)

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

Syntax

grpccontrol.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 control, 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.

Data Type

String

Timeout Property (GRPC Control)

The timeout for the control.

Syntax

grpccontrol.Timeout[=integer]

Default Value

60

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 control will wait for the operation to complete before returning control.

The control 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 control fails with an error.

NOTE: By default, all timeouts are inactivity timeouts, that is, 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.

Data Type

Integer

TransferredData Property (GRPC Control)

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

Syntax

grpccontrol.TransferredData

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).

To read or write binary data to the property, a Variant (Byte Array) version is provided in .TransferredDataB.

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

Data Type

Binary String

TransferredDataLimit Property (GRPC Control)

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

Syntax

grpccontrol.TransferredDataLimit[=long64]

Default Value

0

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.

Data Type

Long64

TransferredHeaders Property (GRPC Control)

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

Syntax

grpccontrol.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.

Data Type

String

URL Property (GRPC Control)

This property includes the URL to post.

Syntax

grpccontrol.URL[=string]

Default Value

""

Remarks

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

Data Type

String

XCount Property (GRPC Control)

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

Syntax

grpccontrol.XCount

Default Value

0

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.

Data Type

Integer

XPath Property (GRPC Control)

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

Syntax

grpccontrol.XPath[=string]

Default Value

""

Remarks

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:

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.

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())); }

Data Type

String

BeginReadMessage Method (GRPC Control)

This method begins reading a message.

Syntax

grpccontrol.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.

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.

BeginReadPacked Method (GRPC Control)

This method begins reading a repeated packed field.

Syntax

grpccontrol.BeginReadPacked WireType

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:

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.

BeginWriteMessage Method (GRPC Control)

This method begins writing a new message.

Syntax

grpccontrol.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

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.

BeginWritePacked Method (GRPC Control)

This method begins writing a new packed repeated field.

Syntax

grpccontrol.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

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.

CalcAuthorization Method (GRPC Control)

This method calculates the Authorization header based on provided credentials.

Syntax

grpccontrol.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 control 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 Control)

Sets or retrieves a configuration setting.

Syntax

grpccontrol.Config ConfigurationString

Remarks

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

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the control, 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 Control)

This method processes events from the internal message queue.

Syntax

grpccontrol.DoEvents 

Remarks

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

EndReadMessage Method (GRPC Control)

This method ends reading a message.

Syntax

grpccontrol.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.

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.

EndReadPacked Method (GRPC Control)

This method ends reading a packed repeated field.

Syntax

grpccontrol.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.

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.

EndWriteMessage Method (GRPC Control)

This method ends writing a message.

Syntax

grpccontrol.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

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.

EndWritePacked Method (GRPC Control)

This method ends writing a packed repeated field.

Syntax

grpccontrol.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

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.

HasXPath Method (GRPC Control)

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

Syntax

grpccontrol.HasXPath XPath

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 Control)

This method interrupts the current method.

Syntax

grpccontrol.Interrupt 

Remarks

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

Post Method (GRPC Control)

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

Syntax

grpccontrol.Post URL

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 Control)

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

Syntax

grpccontrol.ReadBool 

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 Control)

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

Syntax

grpccontrol.ReadBytes 

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 Control)

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

Syntax

grpccontrol.ReadDouble 

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 Control)

This method reads the next field number and returns it.

Syntax

grpccontrol.ReadFieldNumber 

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 Control)

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

Syntax

grpccontrol.ReadFixed32 

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 Control)

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

Syntax

grpccontrol.ReadFixed64 

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 Control)

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

Syntax

grpccontrol.ReadFloat 

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 Control)

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

Syntax

grpccontrol.ReadInt32 

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 Control)

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

Syntax

grpccontrol.ReadInt64 

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 Control)

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

Syntax

grpccontrol.ReadSint32 

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 Control)

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

Syntax

grpccontrol.ReadSint64 

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 Control)

This method skips reading a value from the current field.

Syntax

grpccontrol.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 Control)

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

Syntax

grpccontrol.ReadString 

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 Control)

This method will reset the control.

Syntax

grpccontrol.Reset 

Remarks

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

TryXPath Method (GRPC Control)

This method navigates to the specified XPath if it exists.

Syntax

grpccontrol.TryXPath xpath

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 Control)

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

Syntax

grpccontrol.WriteBool value

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 Control)

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

Syntax

grpccontrol.WriteBytes value

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 Control)

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

Syntax

grpccontrol.WriteDouble value

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 Control)

This method specifies the field number to write.

Syntax

grpccontrol.WriteFieldNumber value

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 Control)

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

Syntax

grpccontrol.WriteFixed32 value

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 Control)

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

Syntax

grpccontrol.WriteFixed64 value

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 Control)

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

Syntax

grpccontrol.WriteFloat value

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 Control)

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

Syntax

grpccontrol.WriteInt32 value

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 Control)

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

Syntax

grpccontrol.WriteInt64 value

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 Control)

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

Syntax

grpccontrol.WriteSint32 value

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 Control)

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

Syntax

grpccontrol.WriteSint64 value

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 Control)

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

Syntax

grpccontrol.WriteString value

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 Control)

Fired immediately after a connection completes (or fails).

Syntax

Sub grpccontrol_Connected(StatusCode As Integer, Description As String)

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. The corresponding Visual Basic error code can be obtained by adding 15001 to this value.

Please refer to the Error Codes section for more information.

ConnectionStatus Event (GRPC Control)

Fired to indicate changes in the connection state.

Syntax

Sub grpccontrol_ConnectionStatus(ConnectionEvent As String, StatusCode As Integer, Description As String)

Remarks

This 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:

Disconnected Event (GRPC Control)

Fired when a connection is closed.

Syntax

Sub grpccontrol_Disconnected(StatusCode As Integer, Description As String)

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. The corresponding Visual Basic error code can be obtained by adding 15001 to this value.

Please refer to the Error Codes section for more information.

EndTransfer Event (GRPC Control)

Fired when a document finishes transferring.

Syntax

Sub grpccontrol_EndTransfer(Direction As Integer)

Remarks

This 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 Control)

Fired when information is available about errors during data delivery.

Syntax

Sub grpccontrol_Error(ErrorCode As Integer, Description As String)

Remarks

The Error event is fired in case of exceptional conditions during message processing. Normally the control fails with an error.

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 Control)

Fired once for each log message.

Syntax

Sub grpccontrol_Log(LogLevel As Integer, Message As String, LogType As String)

Remarks

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

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

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 Control)

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

Syntax

Sub grpccontrol_MessageIn(Compressed As Boolean, MessageLength As Integer)

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 Control)

Fired when a redirection is received from the server.

Syntax

Sub grpccontrol_Redirect(Location As String, Accept As Boolean)

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 control fails with an error. Location is the location to which the client is being redirected. Further control over redirection is provided in the FollowRedirects property.

SSLServerAuthentication Event (GRPC Control)

Fired after the server presents its certificate to the client.

Syntax

Sub grpccontrol_SSLServerAuthentication(CertEncoded As String, CertSubject As String, CertIssuer As String, Status As String, Accept As Boolean)

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 Control)

Fired when secure connection progress messages are available.

Syntax

Sub grpccontrol_SSLStatus(Message As String)

Remarks

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

StartTransfer Event (GRPC Control)

Fired when a document starts transferring (after the headers).

Syntax

Sub grpccontrol_StartTransfer(Direction As Integer)

Remarks

This 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 Control)

Fired when the HTTP status line is received from the server.

Syntax

Sub grpccontrol_Status(HTTPVersion As String, StatusCode As Integer, Description As String)

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 Control)

Fired while a document transfers (delivers document).

Syntax

Sub grpccontrol_Transfer(Direction As Integer, BytesTransferred As Long64, PercentDone As Integer, Text As String)

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.

Config Settings (GRPC Control)

GRPC Config Settings

HTTP Config Settings

TCPClient Config Settings

SSL Config Settings

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

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

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

Socket Config Settings

Base Config Settings

Trappable Errors (GRPC Control)

HTTP Errors

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

TCPClient Errors

SSL Errors

TCP/IP Errors