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Basic VSP Programming

VS-B-9 Header Parsing Functions

Header Parsing Functions (Cookie Example)

Preliminaries

• The HTTP request header contains lines of request information.
• Every user-agent (browser) sends at least one request line to the Web server.
• The "lines" argument in VSPs is an array of the user-agent request lines.

Methods for accessing the request parameters

• A specific attribute can be accessed with the http_request_header() function.
• The header lines can be accessed with aref() function.
• Parsing the header line can be done with the split_and_decode() function.

Cookie Demo

This example shows how to set a cookie in the user-agent, and displaying a cookie string when retrieved.

• Setting the cookie is done with the http_header() function. (see also:VS-B-5)
• Retrieving the cookie string is done with http_request_header() function.