From 136f42f503cb3e9588e62332d043e92b7475ec4e Mon Sep 17 00:00:00 2001 From: Denis Vlasenko Date: Sun, 11 Feb 2007 14:52:07 +0000 Subject: Add CGI docs --- docs/cgi/cl.html | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 docs/cgi/cl.html (limited to 'docs/cgi/cl.html') diff --git a/docs/cgi/cl.html b/docs/cgi/cl.html new file mode 100644 index 0000000..5779d62 --- /dev/null +++ b/docs/cgi/cl.html @@ -0,0 +1,46 @@ +CGI Command line options

CGI Command line options

+

+ +

Specification

+ +The command line is only used in the case of an ISINDEX query. It is +not used in the case of an HTML form or any as yet undefined query +type. The server should search the query information (the QUERY_STRING environment variable) for a non-encoded += character to determine if the command line is to be used, if it +finds one, the command line is not to be used. This trusts the clients +to encode the = sign in ISINDEX queries, a practice which was +considered safe at the time of the design of this specification.

+ +For example, use the finger script and the ISINDEX interface to look up "httpd". You will see that the script will call itself with /cgi-bin/finger?httpd and will actually execute "finger httpd" on the command line and output the results to you. +

+If the server does find a "=" in the QUERY_STRING, +then the command line will not be used, and no decoding will be +performed. The query then remains intact for processing by an +appropriate FORM submission decoder. +Again, as an example, use this hyperlink to submit "httpd=name" to the finger script. Since this QUERY_STRING +contained an unencoded "=", nothing was decoded, the script didn't know +it was being submitted a valid query, and just gave you the default +finger form. +

+If the server finds that it cannot send the string due to internal +limitations (such as exec() or /bin/sh command line restrictions) the +server should include NO command line information and provide the +non-decoded query information in the environment +variable QUERY_STRING.

+

+

Examples

+ +Examples of the command line usage are much better demonstrated than explained. For these +examples, pay close attention to the script output which says what +argc and argv are.

+ +

+ +[Back]Return to the +interface specification

+ +CGI - Common Gateway Interface +

cgi@ncsa.uiuc.edu
+ + + \ No newline at end of file -- cgit v1.1