Simple HTTP proxy written in PHP for uncooperative servers
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README.md

proxyhp

A simple HTTP proxy written in PHP for exotic server configurations.

Example

Here’s the only two files you will need to configure on the server. For example, if you want your proxy to be in /localDir, the configuration will be the following.

index.php

<?php
require('proxy.php');
new Proxy('example.com', 80, '/remoteDir', '/localDir');
?>

.htaccess

FallbackResource /localDir/index.php

Now, every request to mydomain.com/localDir/* will redirect to example.com/remoteDir/*

Motivation

My school provide a free subdomain that I wanted to use, but they’ll point to some PHP servers, on which you have a write access but not admin rights. As I wanted a NodeJS application that could run on a server inside the school but not accessible from outside, I wanted a PHP proxy to redirect the HTTP traffic to this server. However, all solutions I found required either cURL, late PHP versions, or Apache modules that I couldn’t install. So I decided to write my own.

Installation

You will probably only want the proxy.php file that is the only thing needed to make it run.

wget https://raw.githubusercontent.com/GeoffreyFrogeye/phroxyp/master/proxy.php
chmod 755 proxy.php

Then you will need to write an index.php file, containing the following:

<?php
require('proxy.php');
new Proxy('example.com', 80, '/remoteDir', '/localDir');
?>

Where:

  • example.com is the target hostname
  • 80 is the target port (default: 80)
  • /remoteDir is the directory to point on on the target (default: ``)
    • For example, if set to /superapplication, it will redirect to example.com/superapplication
  • /localDir is the directory that contains the file (default: ``)
    • For example, if you need to type mydomain.com/superproxy/index.php to access this file, set this to /superproxy

Then, create the .htaccess file in order to redirect every request made in localDir to index.php that will handle it. In most situations, you will onyl need the following line.

FallbackResource /localDir/index.php

If your server doesn’t support this, try replacing it with the following.

ErrorDocument 404 /localDir/index.php

The HTTP status code will be the one returned by the target, even on fastCGI servers, don’t worry.

If you get a 404 error when trying to access .php files, add the following.

RemoveHandler .php

Be warned that the application doesn’t change the links that are inside the request. For example, if the example.com/index.html has a link to /style.css, and you access it from mydomain.com/toExample/index.html, the browser will look for mydomain.com/style.css, which may not be the wanted result. To prevent this, you will need to either modify the links on the target, or to put the proxy in the root directory of your server.

Known working configurations

  • Apache versions: 2.0, 2.2
  • PHP versions: 5.3, 5.5
  • Content types: application/x-www-urlencoded, application/json

If your configuration doesn’t work, feel free to post an issue, I’ll be happy to help you!