Configuration Variables

In addition to server variables and environment variables, some special variables are supported. These variables may not be implemented on all platforms.

HOSTSERVER Returns IIS or Apache. Note that under IIS, the SERVER_SOFTWARE server variable can be used to retrieve the version number. However, this server variable may be undefined under Apache.
MAXTHREADS

Resolves to the number of threads configured in the BIS thread pool. This is the number of threads that are available for requests. Under Apache, this is undefined (use DEFAULT=1 if portability is desired).
REQUEST_URL Retrieves the completely qualified URL of the stencil (.srf) file that was requested by the client. This includes the scheme, hostname, port number (if non-standard), path, and parameters, query string, and fragment (if specified).
REQUEST_BASE_URL Retrieves the completely qualified base URL of the current stencil (.srf) file that was requested by the client. This includes the scheme, hostname, port number (if non-standard), and the path (which always ends in a slash).

The base URL is defined as the directory that contains the stencil that was requested by the client.

STARTSERVICE Returns the entire argument list of the currently active StartService tag, including commas. If there is no active service program, the value is considered undefined and may be overridden with the DEFAULT operation.
SCHEME

Returns the scheme that was used to request the current page: currently returns either http or https. Note that the :// delimiter that follows the scheme is not included. This is useful for constructing URLs:

<a href="{{ Value(SCHEME, CONFIG) }}://
{{ Value(HTTP_HOST,URLENCODE) }}
{{ Value(HTTP_URL,GETDIR,URLDECODE,URLENCODE)
}}/default.srf">

(Note that the above must be on a single line, or spaces will be inserted.) Under BIS/IIS, the scheme is derived from the SERVER_PORT_SECURE server variable, where a value of 0 indicates http and nonzero indicates https.

SERVICENAME Retrieves the name of the currently active service program. If there is no active service program, the value is considered undefined and may be overridden with the DEFAULT operation.
VERSION Retrieves BIS version information. The format of the version number is aa.bb.cc.yyyy/mm/dd, where aa.bb.cc indicates the numeric major/minor/patch level version, and yyyy/mm/dd is the build date.