httpd: summay of environment variables for cgi

[Dirk Clemens]

Here is a list of environment variables divided into five categories:

standard & implemented in busybox-httpd:
    SERVER_SOFTWARE
    GATEWAY_INTERFACE
    SERVER_PROTOCOL
    SERVER_PORT
    REQUEST_METHOD
    PATH_INFO
    SCRIPT_NAME
    QUERY_STRING
    REMOTE_ADDR
    AUTH_TYPE
    REMOTE_USER
    CONTENT_TYPE
    CONTENT_LENGTH

standard, but missing in busybox-httpd
    SERVER_NAME
    PATH_TRANSLATED
    REMOTE_HOST
    REMOTE_IDENT

standard, special HTTP_*, implemented
    HTTP_COOKIE
    HTTP_REFERER

additional by busybox-httpd
    (PATH)
    REQUEST_URI
    SCRIPT_FILENAME

additional by busybox-httpd, enabled with
CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
    REMOTE_PORT

*******

Comments:

4 standard vars are not supported.

The definition of REMOTE_PORT has an own configuration parameter
to save one code line and in inetd-only configuraion
the shared function addEnvPort() with two lines effective code.
Is it that worth?

Perhaps it is better to change this with:

config CONFIG_FEATURE_HTTPD_SET_ADDITIONAL_ENV
        bool "  Support non standard environment variables for CGI
(REQUEST_URI,SCRIPT_FILENAME,REMOTE_PORT)"
        default n
        depends on CONFIG_FEATURE_HTTPD_CGI
        help
          ...

********

The query string decoding error is still there. The standard says:

QUERY_STRING:
The information which follows the ? in the URL which referenced this
script. This is the query information. It should not be decoded in any
fashion. This variable should always be set when there is query
information, regardless of command line decoding.


Dirk

P.S.:
cgi spec: http://hoohoo.ncsa.uiuc.edu/cgi/env.html