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GContacts Configuration

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

GContacts Configuration Settings

BlogWebsite:   The Blog Website URL of the current contact in a Google Contacts feed.

This property is used to obtain the Blog Website URL of the specified contact within a Google Contact feed and will be populated once ContactIndex is set. If the contact does not have a Blog Website associated with it, this property will return an empty string. This property is also used when updating a contact and can be set to the wanted value prior to calling UpdateContact.

CreateGroup:   Creates a new contact group within the specified Google Contact Group feed.

This configuration setting will use the value contained within GroupTitle to create a new contact group within the feed specified by FeedURL:

Note that FeedURL will need to be set to "https://www.google.com/m8/feeds/groups/[user]/full" in order to modify contact groups.

DeleteGroup:   Deletes a contact group within the specified Google Contact Group feed.

This configuration setting will delete the contact group specified by GroupId within the feed specified by FeedURL.

Note that FeedURL will need to be set to "https://www.google.com/m8/feeds/groups/[user]/full" in order to modify contact groups.

Id:   The Id element value of the current contact in a Google Contacts feed.

This property is used to obtain the Id element value of the specified contact within a Google Contact feed and will be populated once ContactIndex is set.

GetGroupId:   Returns the GroupId for a given contacts group.

This configuration option will return the GroupId for the group with the specified title.

Prior to calling this configuration option you must query the list of all contact groups. Please see the following example:

  GContacts1.FeedURL = "https://www.google.com/m8/feeds/groups/yourEmail@gmail.com/full";
  GContacts1.QueryContacts();  // the feed url is for query contact groups
  string groupId = gcontacts.Config("GetGroupId=My Contact Group");
  GContacts1.FeedURL = "http://www.google.com/m8/feeds/contacts/yourEmail@gmail.com/full";
  GContacts1.AddQueryParam("group", groupId);
  GContacts1.QueryContacts();
Note: To get the GroupId of a predefined group, such as Family, Friends, or Coworkers, the title must be prefixed by "System Group:".

For instance:

  • "System Group: Family"
  • "System Group: Friends"
  • "System Group: Coworkers"

GroupCount:   The number of contact groups contained within a Google Contact Group feed.

This configuration setting is updated to reflect the total number of contact groups returned within a response (whether you are retrieving a feed/group or making changes to a feed/group).

GroupIndex:   The index of the current contact group in a Google Contact Group feed.

This configuration setting is used to specify a contact group within a retrieved Google Contact Group feed. Once set, the following configuration settings will be populated:

GroupId:   The Id of the current contact group in a Google Contact Group feed.

This configuration setting is used to obtain the GroupId of the specified contact group within a Google Contact Group feed and will be populated once GroupIndex is set.

GroupETag:   The ETag of the current contact group in a Google Contact Group feed.

To ensure that the data sent to Google does not overwrite another client's changes, Google checks the ETag sent with the request against the ETag of the existing contact group. If they do not match, this means the last change was made by a different client, and the "HTTP 412 Precondition Failed" status code is returned.

This property is used to obtain the ETag of the specified contact group within a Google Contact Group feed and will be populated once GroupIndex is set.

This property is also used when retrieving, updating or deleting a group. When GroupETag contains a non-empty string, an "If-None-Match" header will be sent with the entered value when UpdateGroup is called. When DeleteGroup or CreateGroup is called, an "If-Match" header will be sent with the entered value.

To bypass this verification process and process the update regardless of updates from other clients, set this configuration setting to "*".

GroupTitle:   The title of the current contact group in a Google Contact Group feed.

This configuration setting contains the title of the specified group within a Google Contact Group feed. This value will be populated once GroupIndex is set.

This configuration setting is used to specify the title that CreateGroup or UpdateGroup will send in the request.

GroupEditURL:   The Edit URL of the current contact group in a Google Contact Group feed.

This configuration setting contains the Edit URL of the specified group within a Google Contact Group feed. This value will be populated once GroupIndex is set (provided that an Edit URL can be found).

This configuration setting is used to specify the URL that DeleteGroup or UpdateGroup will send a request to. You can change the value if you wish to send the request to a different URL.

NamePrefix:   The Prefix value for a name in a Google Contacts feed.

This setting specifies the prefix of the specified contact within a Google Contact feed and will be populated once ContactIndex is set. For instance, "Mr." or "Mrs.". This setting is also used when updating a contact and can be set to the desired value prior to calling UpdateContact.

NameSuffix:   The Suffix value for a name in a Google Contacts feed.

This setting specifies the suffix of the specified contact within a Google Contact feed and will be populated once ContactIndex is set. For instance, "Jr." or "Sr.". This setting is also used when updating a contact and can be set to the desired value prior to calling UpdateContact.

Occupation:   The Occupation of the current contact in a Google Contacts feed.

This property is used to obtain the Occupation of the specified contact within a Google Contact feed and will be populated once ContactIndex is set. If the contact does not have an Occupation associated with it, this property will return an empty string. This property is also used when updating a contact and can be set to the wanted value prior to calling UpdateContact.

ProfileWebsite:   The Profile Website URL of the current contact in a Google Contacts feed.

This property is used to obtain the Profile Website URL of the specified contact within a Google Contact feed and will be populated once ContactIndex is set. If the contact does not have a Profile Website associated with it, this property will return an empty string. This property is also used when updating a contact and can be set to the wanted value prior to calling UpdateContact.

QueryGroups:   Queries a Google Contact Group feed.

This configuration setting queries a Google Contact Group feed specified by FeedURL.

Note that FeedURL will need to be set to "https://www.google.com/m8/feeds/groups/[user]/full" in order to query contact groups.

Title:   The Title element value of the current contact in a Google Contacts feed.

This property is used to obtain the Title element value of the specified contact within a Google Contact feed and will be populated once ContactIndex is set.

Updated:   The last time the current contact in a Google Contacts feed was updated.

This property is used to obtain the last time the specified contact within a Google Contact feed was updated and will be populated once ContactIndex is set.

UpdateGroup:   Updates a Google Contact Group.

This configuration setting updates the Google Contact Group specified by GroupIndex with the value in GroupTitle

Note that FeedURL will need to be set to "https://www.google.com/m8/feeds/groups/[user]/full" in order to modify contact groups.

GData Configuration Settings

AccountType:   The type of account to request authorization for.

Specifies the account type used when requesting authorization. Under most circumstances this does not need to be changed. If the user account is tied to both a Google Account and Google Apps account specify either HOSTED or GOOGLE to indicate which one to authenticate for. Possible values are:

HOSTED_OR_GOOGLE (Default) Get authorization first for a hosted account; if attempt fails, get authorization for a Google account.
GOOGLEGet authorization for a Google account only.
HOSTEDGet authorization for a hosted account only.

CaptchaToken:   The token received from Google during a CAPTCHA challenge.

If you attempt too many logins with the incorrect credentials, Google will throw a CAPTCHA challenge sending you a captcha token and an image URL. This returns the value of the captcha token provided by Google. Before logging in again, you should set the CaptchaValue to the string in the image contained in CaptchaURL.

Alternatively, you can go to https://www.google.com/accounts/UnlockCaptcha to unlock the account.

CaptchaURL:   The image URL received from Google during a CAPTCHA challenge.

This returns URL of the CAPTCHA image, you will need to retrieve the image contained in the URL and pass the string contained in the image into CaptchaValue in order to unlock the account.

CaptchaValue:   The value given by the person responding to the CAPTCHA challenge.

This stores the value given by the person responding to the CAPTCHA challenge. It should contain the string in the image contained in CaptchaURL

If CaptchaToken and CaptchaValue have been set, the component will populate the request to respond to the captcha challenge.

DateFormat:   The format string to be used for formatting the DateTime values received from the server.

By default, the DateTime values returned by Google follow the timestamp format specified within RFC 3339 (e.g. "2011-04-04T18:44:20.000Z"). This property allows you to alter the display format of all the DateTime values within the component (this includes properties and events). For example, setting DateFormat to "MM-dd-yyyy" will change the format of the previously shown date to "02-17-2011". Below is a table of the available format specifiers, their descriptions, along with examples.

Format specifierDescriptionExamples
yThe year, from 0 to 99.Thu, 17 Feb 2011 18:09:45 GMT -> 11

Thu, 17 Feb 2009 18:09:45 GMT -> 9

yyThe year, from 00 to 99.Thu, 17 Feb 2011 18:09:45 GMT -> 11

Thu, 17 Feb 2009 18:09:45 GMT -> 09

yyyyThe year as a four-digit number.Thu, 17 Feb 2011 18:09:45 GMT -> 2011
MThe month, from 1 to 12.Thu, 17 Feb 2011 18:09:45 GMT -> 2
MMThe month, from 01 to 12.Thu, 17 Feb 2011 18:09:45 GMT -> 02
MMMThe abbreviated name of the month.Thu, 17 Feb 2011 18:09:45 GMT -> Feb
MMMMThe full name of the month.Thu, 17 Feb 2011 18:09:45 GMT -> February
dThe day of the month, from 1 through 31.Thu, 17 Feb 2011 18:09:45 GMT -> 17

Thu, 9 Feb 2011 18:09:45 GMT -> 9

ddThe day of the month, from 01 through 31.Thu, 17 Feb 2011 18:09:45 GMT -> 17

Thu, 9 Feb 2011 18:09:45 GMT -> 09

DThe short abbreviated name of the day of the week.Thu, 17 Feb 2011 18:09:45 GMT -> Th
DDThe medium abbreviated name of the day of the week.Thu, 17 Feb 2011 18:09:45 GMT -> Thu
DDDThe full name of the day of the week.Thu, 17 Feb 2011 18:09:45 GMT -> Thursday
hThe hour, using a 12-hour clock from 1 to 12.Thu, 17 Feb 2011 18:09:45 GMT -> 6
hhThe hour, using a 12-hour clock from 01 to 12.Thu, 17 Feb 2011 18:09:45 GMT -> 06
HThe hour, using a 24-hour clock from 1 to 23.Thu, 17 Feb 2011 18:09:45 GMT -> 18

Thu, 17 Feb 2011 8:09:45 GMT -> 8

HHThe hour, using a 24-hour clock from 01 to 23.Thu, 17 Feb 2011 18:09:45 GMT -> 18

Thu, 17 Feb 2011 8:09:45 GMT -> 08

aThe first character of the AM/PM designator.Thu, 17 Feb 2011 18:09:45 GMT -> P

Thu, 17 Feb 2011 8:09:45 GMT -> A

aaThe AM/PM designator.Thu, 17 Feb 2011 18:09:45 GMT -> PM

Thu, 17 Feb 2011 8:09:45 GMT -> AM

mThe minute, from 0 to 59.Thu, 17 Feb 2011 18:09:45 GMT -> 9

Thu, 17 Feb 2011 8:59:45 GMT -> 59

mmThe minute, from 00 to 59.Thu, 17 Feb 2011 18:09:45 GMT -> 09

Thu, 17 Feb 2011 8:59:45 GMT -> 59

sThe second, from 0 to 59.Thu, 17 Feb 2011 18:09:45 GMT -> 45

Thu, 17 Feb 2011 8:59:09 GMT -> 9

ssThe second, from 00 to 59.Thu, 17 Feb 2011 18:09:45 GMT -> 45

Thu, 17 Feb 2011 8:59:09 GMT -> 09

zThe time zone.Thu, 17 Feb 2011 18:09:45 GMT -> GMT

NameAndEmailFormat:   Determines how the data of the name and e-mail properties will be formatted.

This property allows you to control how the data of the name and e-mail properties will be formatted. The available formats are:

0 (default)SMTP Format: Name <e-mail address>
1Name only.
2E-mail address only.

Source:   The source parameter value for Google ClientLogin.

This property allows you to set the source parameter of Google ClientLogin for logging purposes. This string should take the form: "companyName-applicationName-versionID".

By default, this value will be "nsoftware-ingoogle"

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

This property contains the contents of the last response from the server. TransferredDataLimit controls the maximum amount of data accumulated in TransferredData (by default there is no limit).

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

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

ServiceName:   The name of the Google Data service.

This property is used to specify the Google Data service name that you wish to connect to. The service name is the string value provided by Google for the Google Data API you wish to use. For example, when using the Google Contacts API you would do:

GDataControl.Config("ServiceName=cp")

Note this property is used during the authentication process and must be set prior to retrieving a feed or adding and updating an entry.

User:   The user's email address used for Client Login authentication.

Specifies the user's full email address used for Client Login authentication. When User and Password are specified, and Authorization is empty the class will attempt Client Login authentication. Note that Client Login is deprecated and OAuth 2.0 is the recommended authentication mechanism.

Password:   The user's password used for Client Login authentication.

Specifies the user's password used for Client Login authentication. When User and Password are specified, and Authorization is empty the class will attempt Client Login authentication. Note that Client Login is deprecated and OAuth 2.0 is the recommended authentication mechanism.

HTTP Configuration Settings

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

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

AllowHTTPCompression:   This property enables HTTP compression for receiving data.

This is the same as the AllowHTTPCompression property. This setting is exposed here for use by classs that inherit from HTTP.

AllowIdenticalRedirectURL:   Allow redirects to the same URL.

By default the class does not allow redirects to the same URL to avoid redirect loops. In some cases the server may intentionally redirect the client back to the same URL. In that case this setting may be set to True to allow the redirect to be followed. The default value is False.

Append:   Whether to append data to LocalFile.

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

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

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

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

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

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

Returns the raw number of bytes from the HTTP response data, prior to the component processing the data, whether it is chunked and/or compressed. This returns the same value as the Transfer event, by BytesTransferred.

EncodeURL:   If set to true the URL will be encoded by the class.

The default value is false. If set to true the URL passed to the class will be URL encoded.

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

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

If this property is set to 2 (Same Scheme), the new URL is retrieved automatically only if the URL Scheme is the same, otherwise the class fails with an error.

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

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

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 0 (Never). In this case, redirects are never followed, and the class fails with an error instead.

Valid options are:

  • 0 - Never
  • 1 - Always
  • 2 - Same Scheme

GetOn302Redirect:   If set to true the class will perform a GET on the new location.

The default value is false. If set to true the class will perform a GET on the new location. Otherwise it will use the same HTTP method again.

HTTPVersion:   The version of HTTP used by the class.

Possible values include "1.0", and "1.1". The default is "1.1".

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

This is the same as the IfModifiedSince property. This setting is exposed here for use by classs that inherit from HTTP.

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

If true, the component will not send the 'Connection: Close' header. The absence of the Connection header indicates to the server that HTTP persistent connections should be used if supported. Note that not all server support persistent connections. You may also explicitly add the Keep-Alive header to the request headers by setting OtherHeaders to 'Connection: Keep-Alive'. If false, the connection will be closed immediately after the server response is received.

The default value for KeepAlive is false.

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

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

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

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

The headers must be of the format "header: value" as described in the HTTP specifications. Header lines should be separated by CRLF ("\r\ n") .

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

This configuration option is useful for extending the functionality of the class beyond what is provided.

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

Similar to the Authorization config, but for proxy authorization. If this config contains a non-empty string, a Proxy-Authorization HTTP request header is added to the request. This header conveys proxy authorization information to the server. If ProxyUser and ProxyPassword are specified, this value is calculated using the algorithm specified by ProxyAuthScheme.

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

This is the same as ProxyAuthScheme. This setting is provided for use by classs that do not directly expose Proxy properties.

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

This is the same as ProxyPassword. This setting is provided for use by classs that do not directly expose Proxy properties.

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

This is the same as ProxyPort. This setting is provided for use by classs that do not directly expose Proxy properties.

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

This is the same as ProxyServer. This setting is provided for use by classs that do not directly expose Proxy properties.

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

This is the same as ProxyUser. This setting is provided for use by classs that do not directly expose Proxy properties.

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

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

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

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

UseChunkedEncoding:   Enables or Disables HTTP chunked encoding for transfers.

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

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

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

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

UsePlatformHTTPClient:   Whether or not to use the platform HTTP client.

If True, the component will use the default HTTP client for the platform (URLConnection in Java, WebRequest in .NET, or CFHTTPMessage in Mac/iOS) instead of the internal HTTP implementation. This is important for environments where direct access to sockets is limited or not allowed (as in the Google AppEngine for instance).

Note: This setting is only applicable to Mac/iOS editions.

UserAgent:   Information about the user agent (browser).

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

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

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

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

IPPort Configuration Settings

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

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

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

This is the same as FirewallAutoDetect. This setting is provided for use by classs that do not directly expose Firewall properties.

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

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

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

NOTE: This is the same as FirewallHost. This setting is provided for use by classs that do not directly expose Firewall properties.

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

If FirewallHost is specified, the FirewallUser and FirewallPassword settings are used to connect and authenticate to the given firewall. If the authentication fails, the class fails with an error.

NOTE: This is the same as FirewallPassword. This setting is provided for use by classs that do not directly expose Firewall properties.

FirewallPort:   The TCP port for the FirewallHost;.

Note that the FirewallPort is set automatically when FirewallType is set to a valid value.

NOTE: This is the same as FirewallPort. This setting is provided for use by classs that do not directly expose Firewall properties.

FirewallType:   Determines the type of firewall to connect through.

The appropriate values are as follows:

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

NOTE: This is the same as FirewallType. This setting is provided for use by classs that do not directly expose Firewall properties.

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

If the FirewallHost is specified, the FirewallUser and FirewallPassword settings are used to connect and authenticate to the Firewall. If the authentication fails, the class fails with an error.

NOTE: This is the same as FirewallUser. This setting is provided for use by classs that do not directly expose Firewall properties.

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

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

Note: This value is not applicable in Java.

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

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

Note: This value is not applicable in Java or MAC.

KeepAliveRetryCount:   The number of keep-alive packets to be sent before the remotehost is considered disconnected.

When set, TCPKeepAlive will automatically be set to true. A TCP keep-alive packet will be sent after a period of inactivity as defined by KeepAliveTime. If no acknowledgement is received from the remote host the keep-alive packet will be re-sent. This setting specifies the number of times that the keep-alive packets will be re-sent before the remote host is considered disconnected. The system default if this value is not specified here is 9.

Note: This configuration setting is only available in the Unix platform, and isn't supported in Mac OS or FreeBSD.

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

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

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

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

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

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

LingerTime:   Time in seconds to have the connection linger.

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

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

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

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

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

LocalPort:   The TCP port in the local host where the class binds.

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

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

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

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

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

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

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

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

The minimum value for MaxLineLength is 256 bytes. The default value is 2048 bytes. The maximum value is 65536 bytes.

MaxTransferRate:   The transfer rate limit in bytes per second.

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

RecordLength:   The length of received data records.

If set to a positive value, this setting defines the length of data records to be received. The class will accumulate data until RecordLength is reached and only then fire the DataIn event with data of length RecordLength. This allows data to be received as records of known length. This value can be changed at any time, including within the DataIn event.

The default value is 0, meaning this setting is not used.

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

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

Note: This value is not applicable in Java.

UseIPv6:   Whether to use IPv6.

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

0 IPv4 Only
1 IPv6 Only
2 IPv6 with IPv4 fallback

TcpNoDelay:   Whether or not to delay when sending packets.

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

By default, this config is set to false.

SSL Configuration Settings

ReuseSSLSession:   Determines if the SSL session is reused.

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

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

SSLCipherStrength:   The minimum cipher strength used for bulk encryption.

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

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

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

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

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

Used to enable/disable the supported security protocols.

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

TLS1.23072 (Hex C00) (Default)
TLS1.1768 (Hex 300) (Default)
TLS1 192 (Hex C0) (Default)
SSL3 48 (Hex 30)
SSL2 12 (Hex 0C)

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

TLS 1.1 and TLS1.2 support are only available starting with Windows 7.

SSLProvider:   The name of the security provider to use.

Change this setting to use security providers other than the system default.

Use this setting with caution. Disabling SSL security or pointing to the wrong provider could potentially cause serious security vulnerabilities in your application.

The special value "*" (default) picks the default SSL provider defined in the system.

Note: On Windows systems, the default SSL Provider is "Microsoft Unified Security Protocol Provider" and cannot be changed.

SSLSecurityFlags:   Flags that control certificate verification.

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

0x00000001Ignore time validity status of certificate.
0x00000002Ignore time validity status of CTL.
0x00000004Ignore non-nested certificate times.
0x00000010Allow unknown Certificate Authority.
0x00000020Ignore wrong certificate usage.
0x00000100Ignore unknown certificate revocation status.
0x00000200Ignore unknown CTL signer revocation status.
0x00000400Ignore unknown Certificate Authority revocation status.
0x00000800Ignore unknown Root revocation status.
0x00008000Allow test Root certificate.
0x00004000Trust test Root certificate.
0x80000000Ignore non-matching CN (certificate CN not-matching server name).

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

OpenSSLCADir:   The path to a directory containing CA certificates.

This functionality is available only when the provider is OpenSSL.

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

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

This functionality is available only when the provider is OpenSSL.

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

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

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

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

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

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

This functionality is available only when the provider is OpenSSL.

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

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

This functionality is available only when the provider is OpenSSL.

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

Socket Configuration Settings

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

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

Note: This option is not valid for UDP ports.

FirewallData:   Used to send extra data to the firewall.

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

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

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

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

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

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

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

Base Configuration Settings

SelectWaitMillis:   The length of time in milliseconds the class will wait when DoEvents is called if there are no events to process.

If there are no events to process when DoEvents is called, the class will wait for the amount of time specified here before returning. The default value is 20.

Base Configuration Settings

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

The default code page is the Active Code Page (0).

The following is a list of valid code page identifiers:

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

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

IdentifierName
1ASCII
2NEXTSTEP
3JapaneseEUC
4UTF8
5ISOLatin1
6Symbol
7NonLossyASCII
8ShiftJIS
9ISOLatin2
10Unicode
11WindowsCP1251
12WindowsCP1252
13WindowsCP1253
14WindowsCP1254
15WindowsCP1250
21ISO2022JP
30MacOSRoman
10UTF16String
0x90000100UTF16BigEndian
0x94000100UTF16LittleEndian
0x8c000100UTF32String
0x98000100UTF32BigEndian
0x9c000100UTF32LittleEndian
65536Proprietary

 
 
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