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Added PHPROXY as a service

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* Release 0.5b2 January 20th, 2007
_____________________________________________________________________
- Moved hotlinking prevention further down in the code
- upon_hotlink option 1 behavior changed to show the URL form using show_report() instead of a buggy HTTP redirect
- Default value for upon_hotlink is now 1 (show URL form page w/ error) instead of 2 (404 Error)
- Fixed XSS vulnerbility in the address box in index.inc.php (Thanks Ryan from http://proxy.gd)
- Removed .htaccess file because of "Internal Server Error" on several Apache installations
- Fixed "prev_dir" in url_parse(). It didn't show the Website's address if there were no "previous dirs" (Thanks Rayan)
* Release 0.5b January 19th, 2007
_____________________________________________________________________
- Reworked the script into a procedural programming code style instead of OO. Everything should be more streamlined and faster now.
- Reworked extraction and processing of HTTP response headers. Doesn't depend on regex as much as before.
- Flags are now encoded in base 16 instead of base 2.
- Merged banned_hosts, allowed_hosts into one "hosts" array with each entry being a seperate regex piece of code.
- Sped up HTML proxification decently by optimizing the regex
- Introduced new system for showing errors, reports, and forms. It doesn't depend on HTTP redirects as in 0.4 and below.
- Prevented more private networks from being allowed to be browsed through the proxy
- Dropped the dependency on JavaScript for submitting the URL form
- Entry form now uses POST instead of GET
- Added support for inline CSS proxification
- Added support for connections over SSL (requires PHP >= 4.3.0 and OpenSSL)
- Added support for compressing output using Zlib
- Added hotlinking protection, with options on what to do upon detecting hotlinking
- Added support for flag freezing (i.e. users cannot change the value of frozen flags)
- Added stripslashing for GPC for those with magic_quotes_gpc on
- Added support for P3P and various other response headers
- Fixed mini URL-form not being included on every HTML page
- Fixed issues with POST data
- Fixed the Host request header. The port is only added if necessary
- Fixed Referer request header. It should reflect the actual referer now
- Fixed max_file_size bug
- Fixed the "script_url" variable. It should reflect the port if necessary and whether it's https or not
- Improved file upload support
- Improved URL parsing. It's not perfect, but it's better than before.
- Improved Basic authentication. It also now supports multiple realms per domain and different ports on the same domain
- Improved the usability of URL forms
- Improved cookie support
- Improved URL error notifications
- Improved removal of scripts
- Improved handling of frames and iframes to not display URL forms. This is still extremely buggy however.
- Various other fixes and speed improvements
* Release 0.4 September 7th, 2005
_____________________________________________________________________
- Support for GET forms. Things like Google work now.
- Complete overhaul of the URL modifying function. Now supports
nearly all HTML tags
- Support for CSS proxifying
- New browsing options
- New layout
- Other fixes
* Release 0.3 July 22nd, 2004
_____________________________________________________________________
- Script can now only work for PHP 4.2.0 and newer.
- Support for HTTP file uploads.
- Support for Basic HTTP authorization. Only one relam per domain is
currently supported.
- $this->url_segments['prefix'] should be have been
$this->url_segments['base'] in the follow_location method.
- err_no and err_msg variables are now passed by value in fsockopen
like they should've been.
- mailto: links are now not proxified.
- New helper method: stripslashes()
- All files except HTML are now passed immediately to the user without
first being stored in the script.
- Fixed problem with opening files if the path contained spaces.
- Fixed cookies being passed with the response headers in addition to
the PHProxy cookies
- Fixed problem if the URL started with a question mark.
- New configurable variable: banned_hosts
- A dot at the beginning of domain names in banned_hosts and
allowed_hosts matches all subdomains.
* Release 0.2 June 22nd, 2004:
_____________________________________________________________________
- Fixed bug in set_post_body: $name should have been $parent_key
- New logic for index.php
- Updated some HTML and CSS
- Changed xml to xhtml in public method: return_response() when checking
if we should update the HTML
- Added 7 gTLDs (.aero, .biz, .coop, .info, .museum, .name, .pro) for the regexp when
validating a cookie against a domain
- Updated index.php, url_form.inc to be compatible with short_open_tag = Off
- Anchors now work
- Made the mini URL-form more user friendly
* Release 0.1-alpha June 16th, 2004:
_____________________________________________________________________
Initial release.

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necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Library General
Public License instead of this License.

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PHProxy Source Code README
_____________________________________________________________________
Source Code Version 0.5b2 - January 20th 2007
Latest Version: http://www.sourceforge.net/projects/poxy/
Copyright 2002-2007 Abdullah Arif
Contact
_____________________________________________________________________
Email: phproxy.support@gmail.com
Website: http://whitefyre.com/
Support and Bug Reports
_____________________________________________________________________
http://whitefyre.com/forums/
phproxy.support@gmail.com
Table of Contents
_____________________________________________________________________
1. License
2. What is PHProxy?
3. How it Works
4. Requirements
5. Installation
6. Configurable Script Variables
7. Available Options
8. Disclaimer
9. Bugs and Limitations
10. ChangeLog, FAQ, TODO, LICENSE, Bugs, Limitations
11. Credits
1. License
_____________________________________________________________________
This source code is released under the GPL.
A copy of the license in provided in this package in the file
named LICENSE.txt
2. What is PHProxy?
_____________________________________________________________________
PHProxy is a web HTTP proxy
designed to bypass proxy restrictions through
a web interface very similar to the popular CGIProxy
(http://www.jmarshall.com/tools/cgiproxy/). For example, in my
university, the IT department blocks a lot of harmless websites
simply because of their popularity. So I use this porgram to access
those websites. The only thing that PHProxy needs is a web server
with PHP installed (see Requirements below).
Be aware though, that the sever has to be able to access those
resources to deliver them to you.
3. How it Works
_____________________________________________________________________
You simply supply a URL to the form and click Browse. The script then
accesses that URL, and if it has any HTML contents, it modifies
any URLs so that they point back to the script. Of course, there is more
to it than this, but if you would like to know more in
detail, view the source code.
Comments have yet to be added.
4. Requirements
_____________________________________________________________________
- PHP version >= 4.2.0
- safe_mode turned off or at least having the fsockopen() function not disabled
- PHP version >= 4.3.0 and OpenSSL for support for secure connections (https)
- Zlib for output compression
- file_uploads turned On for HTTP file uploads.
5. Installation
_____________________________________________________________________
Simply upload these files to a directory of your liking (prefrebly in its own directory):
- index.php
- index.inc.php
- style.css
You can rename index.php without any problems, but not index.inc.php.
A good idea is to change these PHP settings in your php.ini file
or for instance Apache's httpd.conf or per directory .htaccess files:
- register_globals = Off (safer for your script)
- magic_quotes_gpc = Off (avoids unnecessary, slow stripslashing in the script)
- always_populate_raw_post_data = Off (no need for this extraneous data)
- zlib.output_compression = On (to enable output compression, better than doing it inside the script)
Your script will still function normally without these settings though.
All you need to do now is to access index.php and start browsing!
6. Configurable Script Variables
_____________________________________________________________________
These variables are available at the beginning of the index.php file:
- $_config:
___________
url_var_name: name of the variable the contains the url
to be passed to the script. default: 'q'
flags_var_name: name of the variables the contains the flags
to be passed to the script. default: 'hl'
get_form_name: name of the GET forms in case they were
passed through the proxy.
default: '____pgfa'
basic_auth_var_name: name of the variable when prompted for Basic
authentication. default: '____pbavn'
max_file_size: maximum file size in BYTES that can be
downloaded through the proxy.
Use -1 for unlimited. default: -1
allow_hotlinking: whether to allow hotlinking or not.
default is not unless in $_hotlink_domains.
default:0
upon_hotlink: what to do if a website hotlinks through your
proxy. Possible values:
- 1: show the URL form (homepage)
- 2: issue a HTTP 404 Not Found error
- any web address which the user will be
redirected to (e.g. goatse pic)
default: 1
compress_output: whether to use gzip compression or not.
This may or may not work depending on whether
your PHP installation has Zlib loaded, and
whether the user's browser supports gzip
content encoding. Turn this on if you're
worried about bandwidth. This might be a
bit taxing on your server if you have any kind of
substantial traffic. It is also better to enable
output compression through php.ini than here.
default: 0
- $_flags:
__________
This array contains the default values for the browsing options which
are explained in section 7.
- $_frozen_flags:
_________________
When a flag is frozen, it is no longer shown in the URL forms, and the
user won't be able to change its value. A frozen flag will always
assume its value given in $_flags. This is useful for forcing
a specific URL encoding, or forcing the mini URL form to always be
there for instance.
0 is for not frozen. 1 is for frozen. default: all are unfrozen.
- $_labels:
___________
The labels on flags.
- $_hosts:
__________
Each entry in this array is a seperate piece of regular expression
code that is matched against the host part of the currently browsed URL.
If it evaluates to true, the user will not be allowed to access
that URL.
The first default entry contains the regular expression for private
networks which are not supposed to be shown on the Internet.
- $_hotlink_domains:
____________________
This array holds entries of domain names which are allowed to hotlink
through your proxy when allow_hotlinking is 0.
To allow "example.com" and "example2.com" to hotlink:
$_hotlink_domains = array('example.com', 'example2.com');
You don't need to include the "www" part as it is automatically
accounted for. Your website's domain name is also automatically included
in this array.
- $_insert:
___________
This does nothing yet.
7. Available Options
_____________________________________________________________________
These options are available to you through the web interface.
You can also edit the default values in the $_flags in index.php
Values can either be 1 (true) or 0 (false).
+-------------------------------------------------------------------+
| Option | Explanation |
+-------------------------------------------------------------------+
| Include Form | Includes a mini URL-form on every HTML page for |
| | easier browsing. |
| Remove Scripts | Remove all sorts of client-side scripting |
| | (i.e. JavaScript). Removal is not perfect. Some |
| | scripts might slip by here and there. |
| Accept Cookies | Accept HTTP cookies |
| Show Images | Show images. You might want to turn this off if |
| | you want to save your server's bandwith. |
| Show Referer | Show referring website in HTTP headers. This |
| | will show the base URL for the website you're |
| | currently viewing. Because many website disable |
| | HotLinking, this can be quite useful. |
| Rotate13 | Use rotate13 encoding on the URL. * |
| Base64 | Use base64 encoding on the URL. * |
| Strip Meta | Strip meta HTML tags |
| Strip Title | Strip Website title |
| Session Cookies| Store cookies for this current session only |
+-------------------------------------------------------------------+
* only one type of encoding will be used even if both are selected
8. Disclaimer
_____________________________________________________________________
Since this script basically bypasses restrictions that were imposed
on you, using it might be illegal in your country, school, office,
or whatever. Even your host might not allow you to run it. Use it at
your own risk. I will not be responsible for any damages done or any
harm that might result from using this script.
9. Bugs and Limitations
_____________________________________________________________________
PHP is retarded by nature, and as such, some problems arise that
would have not if this script were otherwise coded in another programming
language. The first example of this is dots in incoming variable names
from POST and GET. In a normal programming language, this wouldn't be
a problem as these variables could be accessed normally as they are
supplied, with dots included. In PHP, however, dots in GET, POST, and
COOKIE variable names are magically transformed into underscores
because of the stupid shit that is register_globals. Things like Yahoo!
Mail which has dots in variable names will not work. There's no easy way
around this, but luckily, I have provided the solutions right here:
1. I've already taken care of cookies by manually transforming
the underscores manually into dots when needed.
2. For GET variables, this shouldn't be a huge problem since the URLs
are URL-encoded into the url_var_name. The only time this should be
an issue is when a GET form uses dots in input names, and this could
be recitified by using $_SERVER['QUERY_STRING'], and parsing that
variable. But this, luckily, doesn't happen too often.
3. As for POST data, one solution is to use $HTTP_RAW_POST_DATA. But then,
this variable might not be available in certain PHP configurations,
and it would need further parsing, and it still doesn't account
for uploaded FILES. This is extremely impractical and ugly.
The best thing you could do if you have enough control over your Web server
and can compile custom builds of PHP is to delete a single line in a PHP source
code file called "php_variables.c" located in the "main" directory.
The function in question is called "php_register_variable_ex". I've only checked
this with PHP v4.4.4 and the exact line to delete is 117th line which basically
consists of this:
case '.':
Now just compile and install PHP and everything should be fine. Just make
sure that you have register_globals off or something might get messed up.
I've done this on my demo install on http://grab.cc/ and it's working
flawlessly.
Another problem facing many Web proxies is support for JavaScript.
Currently, therse is no such thing in PHProxy 0.5 but hopefully basic
support will be introduced for version 0.6. The best thing you could do
right now is to have the JavaScript disabled on your browsing options
as most sites degrade gracefully, such as Gmail.
A third limitation for Web proxies is content accessed from within proxied
Flash and Java applications and such. Since the proxy script doesn't have access
to the source code of these applications, the links which they may decide
to stream or access will not be proxified. There's no easy solution for this
right now.
PHProxy also doesn't support FTP. This may or may not be introduced
in future releases, but there are no current plans for FTP support.
10. ChangeLog, TODO, LICENSE
_____________________________________________________________________
Refer to the accompanying files.
11. Credits
_____________________________________________________________________
James Marshall (http://www.jmarshall.com/) for his excellent CGIProxy
script which was a high inspiration and guide for me. The HTML
modification section is based off his script.
Also massive thanks to everyone who emailed me or posted on forums bugs,
suggestions, and feedback. I really appreciate it.

17
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- Cookie managment
- JavaScript support
- Support for external proxies
- Frames and iframes shouldn't include the URL form
- Caching options
- More URL encoding methods
- More browsing options
- Support HTTP resuming
- Support HTTP 1.1
- Support more response headers appropriately
- Better "hosts" control
- Improve URL proxification
- Inspect gzip compression furthermore
- Look into proxification of XML files
- Support for multiple languages
- IDN support
- FTP support

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<?php
if (basename(__FILE__) == basename($_SERVER['PHP_SELF']))
{
exit(0);
}
echo '<?xml version="1.0" encoding="utf-8"?>';
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US" xml:lang="en-US">
<head>
<title>Pox Systems</title>
<link rel="stylesheet" type="text/css" href="style.css" title="Default Theme" media="all" />
</head>
<body onload="document.getElementById('address_box').focus()">
<div id="container">
<h1 id="title">Pox Systems</h1>
<ul id="navigation">
<li><a href="<?php echo $GLOBALS['_script_base'] ?>">URL Form</a></li>
<li><a href="javascript:alert('cookie managment has not been implemented yet')">Manage Cookies</a></li>
</ul>
<?php
switch ($data['category'])
{
case 'auth':
?>
<div id="auth"><p>
<b>Enter your username and password for "<?php echo htmlspecialchars($data['realm']) ?>" on <?php echo $GLOBALS['_url_parts']['host'] ?></b>
<form method="post" action="">
<input type="hidden" name="<?php echo $GLOBALS['_config']['basic_auth_var_name'] ?>" value="<?php echo base64_encode($data['realm']) ?>" />
<label>Username <input type="text" name="username" value="" /></label> <label>Password <input type="password" name="password" value="" /></label> <input type="submit" value="Login" />
</form></p></div>
<?php
break;
case 'error':
echo '<div id="error"><p>';
switch ($data['group'])
{
case 'url':
echo '<b>URL Error (' . $data['error'] . ')</b>: ';
switch ($data['type'])
{
case 'internal':
$message = 'Failed to connect to the specified host. '
. 'Possible problems are that the server was not found, the connection timed out, or the connection refused by the host. '
. 'Try connecting again and check if the address is correct.';
break;
case 'external':
switch ($data['error'])
{
case 1:
$message = 'The URL you\'re attempting to access is blacklisted by this server. Please select another URL.';
break;
case 2:
$message = 'The URL you entered is malformed. Please check whether you entered the correct URL or not.';
break;
}
break;
}
break;
case 'resource':
echo '<b>Resource Error:</b> ';
switch ($data['type'])
{
case 'file_size':
$message = 'The file your are attempting to download is too large.<br />'
. 'Maxiumum permissible file size is <b>' . number_format($GLOBALS['_config']['max_file_size']/1048576, 2) . ' MB</b><br />'
. 'Requested file size is <b>' . number_format($GLOBALS['_content_length']/1048576, 2) . ' MB</b>';
break;
case 'hotlinking':
$message = 'It appears that you are trying to access a resource through this proxy from a remote Website.<br />'
. 'For security reasons, please use the form below to do so.';
break;
}
break;
}
echo 'An error has occured while trying to browse through the proxy. <br />' . $message . '</p></div>';
break;
}
?>
<form method="post" action="<?php echo $_SERVER['PHP_SELF'] ?>">
<ul id="form">
<li id="address_bar"><label>Web Address <input id="address_box" type="text" name="<?php echo $GLOBALS['_config']['url_var_name'] ?>" value="<?php echo isset($GLOBALS['_url']) ? htmlspecialchars($GLOBALS['_url']) : '' ?>" onfocus="this.select()" /></label> <input id="go" type="submit" value="Go" /></li>
<?php
foreach ($GLOBALS['_flags'] as $flag_name => $flag_value)
{
if (!$GLOBALS['_frozen_flags'][$flag_name])
{
echo '<li class="option"><label><input type="checkbox" name="' . $GLOBALS['_config']['flags_var_name'] . '[' . $flag_name . ']"' . ($flag_value ? ' checked="checked"' : '') . ' />' . $GLOBALS['_labels'][$flag_name][1] . '</label></li>' . "\n";
}
}
?>
</ul>
</form>
<!-- The least you could do is leave this link back as it is. This software is provided for free and I ask nothing in return except that you leave this link intact
You're more likely to recieve support should you require some if I see a link back in your installation than if not -->
<div id="footer"><a href="http://whitefyre.com/poxy/">PHProxy</a> <?php echo $GLOBALS['_version'] ?></div>
</div>
</body>
</html>

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body, input
{
font-family: "Bitstream Vera Sans", Arial, Helvetica, sans-serif;
color: #44352C;
}
a
{
color: #9B9C83;
text-decoration:none;
border-bottom: 1px orange dashed;
}
a:hover
{
color: #0080FF;
}
#container
{
border: 1px #9B9C83 solid;
-moz-border-radius: 8px;
margin: auto;
padding: 5px;
width: 700px;
}
#title
{
color: #CC6633;
margin: 0;
}
ul#navigation, ul#form
{
list-style-type: none;
padding: 0;
margin: 0;
}
ul#navigation
{
float: right;
}
ul#form
{
clear: both;
}
ul#navigation li
{
float: left;
margin: 0;
padding: 5px 0;
border-top: 2px #BFAA9B solid;
}
ul#navigation li a
{
font-weight: bold;
color: #ffffff;
background-color: #AA8E79;
padding: 5px 15px;
margin-left: 1px;
text-decoration: none;
border-bottom: 0 #ffffff solid;
}
ul#navigation li a:hover
{
color: #44352C;
}
ul#form li
{
width: 700px;
}
#footer
{
color: #9B9C83;
font-size: small;
text-align: right;
}
#address_bar
{
border-top: 2px #BFAA9B solid;
border-bottom: 3px #44352C solid;
background-color: #AA8E79;
text-align: center;
padding: 5px 0;
color: #ffffff;
}
#go
{
background-color: #ffffff;
font-weight: bold;
color: #AA8E79;
border: 0 #ffffff solid;
padding: 2px 5px;
}
#address_box
{
width: 500px;
}
.option
{
padding: 2px 0;
background-color: #EEEBEA;
}
.option label
{
border-bottom: 2px #ffffff solid;
}
form
{
margin: 0;
}
#error, #auth
{
background-color: #BF6464;
border-top: 1px solid #44352C;
border-bottom: 1px solid #44352C;
width: 700px;
clear: both;
}
#auth
{
background-color: #94C261;
}
#error p, #auth p, #auth form
{
margin: 5px;
}