Synopsis

Expand dollar variables in a string.

Prototype

 #include "webs.h"

 char_t *websExpand(webs_t wp, char_t *buf, char_t *string, int bufsize);

Parameters

wp	Web server connection handle
buf	Output buffer
string	Input string
len	Size of output buffer

Description

The websExpand procedure can be used to expand all dollar variables. These include all the standard CGI variables, extended GoAhead WebServer variables and all current per request variables. In addition to the standard set below, all request header variables are stored as "HTTP_name" where name is request header keyword mapped to lower case.  If a particular dollar variable is not found, the original text for that variable is unchanged.

If the buffer is NULL, the expanded string is returned in a dynamically allocated buffer. Use bfree to free the buffer when you are finished.

The standard variable set includes:

COMPANY	Defined company name
CONTENT_LENGTH	Length of posted content
DBNAME	Primary database name "primary"
DESCRIPTION	Product description
D_OS	Operating system name
D_PROD	Home directory for the product
D_SOLUTION	Home directory for solution packs
GATEWAY_INTERFACE	Version of this gateway interface
HTTP_AUTHORIZATION	Password supplied by the browser
HTTP_name	Where name is any key name in the browser request
OS	Operating system
PATH_INFO	URL path information after /form
PATH_TRANSLATED	File system path name for URL document
PRODUCT	Product name
QUERY_STRING	Complete query string
REMOTE_ADDR	Requesting browsers IP address
REMOTE_HOST	Requesting browsers host name
REQUEST_METHOD	Request operation type
SERVER_HOST	Host name for this web server
SERVER_PORT	TCP/IP port used by this web server
SERVER_URL	URL to address the home page for this web server
VERSION	Version number (n.n) for this product
VERSION_FULL	Full version number (n.n.n)

Return Value

Returns the buffer supplied or dynamically allocated buffer if buffer was NULL. Return NULL on errors.

Example

websExpand(wp, NULL, "$COMPANY $SERVER_PORT", -1);

See Also

bfree