Name
    form-input-nginx-module

Description
    This is a nginx module that reads HTTP POST and PUT request body encoded
    in "application/x-www-form-urlencoded", and parse the arguments in
    request body into nginx variables.

    This module depends on the ngx_devel_kit (NDK) module.

Installation
        Get the nginx source code from nginx.net ( http://nginx.net/ ).
        Get the ngx_devel_kit source code from (http://github.com/simpl/ngx_devel_kit)
        Unpack the source code and build nginx with this module.

        $ wget 'http://sysoev.ru/nginx/nginx-1.5.12.tar.gz'
        $ tar -xzvf nginx-1.5.12.tar.gz
        $ cd nginx-1.5.12/

        $ git-clone http://github.com/simpl/ngx_devel_kit.git
        $ git-clone http://github.com/calio/form-input-nginx-module.git

        $ ./configure --add-module=/somepath/form-input-nginx-module --add-module=/somepath/ngx_devel_kit
        $ make -j2
        $ make install

Usage
        set_form_input $variable;
        set_form_input $variable argument;

        set_form_input_multi $variable;
        set_form_input_multi $variable argument;

    example:

        #nginx.conf

        location /foo {
            # ensure client_max_body_size == client_body_buffer_size
            client_max_body_size 100k;
            client_body_buffer_size 100k;

            set_form_input $data;    # read "data" field into $data
            set_form_input $foo foo; # read "foo" field into $foo
        }

        location /bar {
            # ensure client_max_body_size == client_body_buffer_size
            client_max_body_size 1m;
            client_body_buffer_size 1m;

            set_form_input_multi $data; # read all "data" field into $data
            set_form_input_multi $foo data; # read all "data" field into $foo

            array_join ' ' $data; # now $data is an string
            array_join ' ' $foo;  # now $foo is an string
        }

Limitations
    *   ngx_form_input will discard request bodies that are buffered
        to disk files. When the client_max_body_size setting is larger than
        client_body_buffer_size, request bodies that are larger
        than client_body_buffer_size (but no larger than
        client_max_body_size) will be buffered to disk files.
        So it's important to ensure these two config settings take
        the same values to avoid confustion.

Compatibility
    The following versions of Nginx should work with this module:

    *   1.5.x (last tested: 1.5.12)

    *   1.4.x (last tested: 1.4.6)

    *   1.1.x (last tested: 1.1.5)

    *   1.0.x (last tested: 1.0.8)

    *   0.9.x (last tested: 0.9.4)

    *   0.8.0 ~ 0.8.41, 0.8.54+ (0.8.42 ~ 0.8.53 requires a patch, see below,
                                 last tested: 0.8.54)

    *   0.7.x (last tested: 0.7.68)

Note that nginx 0.8.42 ~ 0.8.53 won't work due to a famous regression appeared
since 0.8.42: <http://forum.nginx.org/read.php?29,103078,103078 >,
but a small patch can fix this issue for nginx 0.8.53:

    http://agentzh.org/misc/nginx/nginx-0.8.53-rewrite_phase_fix.patch

This patch may also be applied cleanly for other versions of nginx 0.8.42 ~ 0.8.53 :)

Copyright & License
    Copyright (c) 2010, 2011, Jiale "calio" Zhi <vipcalio@gmail.com>.

    Copyright (c) 2010-2014, Yichun "agentzh" Zhang <agentzh@gmail.com>, CloudFlare Inc.

    This module is licensed under the terms of the BSD license.

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are
    met:

    *   Redistributions of source code must retain the above copyright
        notice, this list of conditions and the following disclaimer.

    *   Redistributions in binary form must reproduce the above copyright
        notice, this list of conditions and the following disclaimer in the
        documentation and/or other materials provided with the distribution.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
    IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
    PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
    HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
    TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Changelog
    Changes with form-input-module v0.0.2

      *) support set_form_input_multi
      *) support PUT method

    Changes with form-input-module v0.0.1

      *) support set_form_input

