getServerVariable(var: String): String;
The getServerVariable method of the WebSession class returns the HTTP header information for your World Wide Web request from your Web server.
As the var parameter depends on the Web server version and can change, refer to your Web server documentation for details.
The code fragment in the following example returns the IP address of the current Web session.
currentSession.getServerVariable('REMOTE_ADDR');
Common server environment variables, documented in the IIS documentation under the ServerVariables function, include those listed in the following table.
| Variable | Returns… |
|---|---|
| HTTP_ACCEPT_LANGUAGE | A string describing the language to use for displaying content |
| HTTP_USER_AGENT | A string describing the browser that sent the request |
| HTTPS | ON (or on) if the request came in through a secure channel (SSL) or it returns OFF (or off) if the request is for a non-secure channel |
| REMOTE_ADDR | IP address of the remote host making the request |
| SERVER_NAME | Host name, DNS alias, or IP address of the server as it would appear in self-referencing URLs |
| SERVER_PORT | Port number to which the request was sent |
| URL | Base portion of the URL |
An exception is raised if this method is invoked from a server method.
You can implement your own getServerVariable method (equivalent to this method in the WebSession class) if you are using a
A name that is longer than 100 characters retrieved by the getServerVariable method call is truncated to 100 characters. This name is used to determine the method to invoke when using non‑wrapped document literal format messages. When the name does not meet the JADE method naming requirements, the method invocation is likely to fail and a SOAP fault to be returned to the Web service consumer.
The following method returns the value of the Internet Server Application Programming Interface (ISAPI) variable (specified by the var parameter) associated with an Internet message that is received.
getServerVariable(var: String): String;
// The request for the ISAPI variable var is built in the bin variable
// The JadeInternetTCPIPConnection instance must exist and be connected
constants
NULL: Character = #00.Character;
vars
bin: Binary;
connection: JadeInternetTCPIPConnection;
begin
if connection <> null and connection.state = Connection.Connected then
if IsUnicodeSystem then
bin := ("GSV" & NULL & var.trimBlanks &
NULL).Binary._unicodeToAnsi; // unpublished Binary method
else
bin := ("GSV" & NULL & var.trimBlanks & NULL).Binary;
endif;
connection.writeBinary(bin);
bin := connection.readBinary(0);
endif;
if IsUnicodeSystem then
return bin.ansiToUnicode.trimBlanks;
else
return bin.String.trimBlanks;
endif;
end;
You can call this method only during the processing of a received Internet message and before the reply is sent. Accessing the method at any other time causes the process to wait indefinitely for the connection read or causes the message exchange process with the jadehttp library to be out of step.