Before anything, download the complete version from SourceForge, to be able to read its licence (Free GPL Licence) and to better follow my instructions if you find yourself a little lost.
Lets start now ! First thing, open your HTML editor (It can be Notepad, Notepad ++ or any other WYSIWYG program like DreamWeaver and InstantLP ..) and create a PHP file named “Index.php”. This file will be the most important one and the leader of the proxy server. You have to only modify configurable variables, which will define what the user will be able to do and what he will see exactly :
//
// CONFIGURABLE OPTIONS
//
$_config = array
(
‘url_var_name’ => ‘q’,
‘flags_var_name’ => ‘hl’,
‘get_form_name’ => ‘____pgfa’,
‘basic_auth_var_name’ => ‘____pbavn’,
‘max_file_size’ => -1,
‘allow_hotlinking’ => 0,
‘upon_hotlink’ => 1,
‘compress_output’ => 0
);
$_flags = array
(
‘include_form’ => 1,
‘remove_scripts’ => 1,
‘accept_cookies’ => 1,
‘show_images’ => 1,
‘show_referer’ => 1,
‘rotate13′ => 0,
‘base64_encode’ => 1,
‘strip_meta’ => 1,
‘strip_title’ => 0,
‘session_cookies’ => 1
);
$_frozen_flags = array
(
‘include_form’ => 0,
‘remove_scripts’ => 0,
‘accept_cookies’ => 0,
‘show_images’ => 0,
‘show_referer’ => 0,
‘rotate13′ => 0,
‘base64_encode’ => 0,
‘strip_meta’ => 0,
‘strip_title’ => 0,
‘session_cookies’ => 0
);
$_labels = array
(
‘include_form’ => array(‘Include Form’, ‘Include mini URL-form on every page’),
‘remove_scripts’ => array(‘Remove Scripts’, ‘Remove client-side scripting (i.e JavaScript)’),
‘accept_cookies’ => array(‘Accept Cookies’, ‘Allow cookies to be stored’),
‘show_images’ => array(‘Show Images’, ‘Show images on browsed pages’),
‘show_referer’ => array(‘Show Referer’, ‘Show actual referring Website’),
‘rotate13′ => array(‘Rotate13′, ‘Use ROT13 encoding on the address’),
‘base64_encode’ => array(‘Base64′, ‘Use base64 encodng on the address’),
‘strip_meta’ => array(‘Strip Meta’, ‘Strip meta information tags from pages’),
‘strip_title’ => array(‘Strip Title’, ‘Strip page title’),
‘session_cookies’ => array(‘Session Cookies’, ‘Store cookies for this session only’)
);
$_hosts = array
(
‘#^127\.|192\.168\.|10\.|172\.(1[6-9]|2[0-9]|3[01])\.|localhost#i’
);
$_hotlink_domains = array();
$_insert = array();
//
// END CONFIGURABLE OPTIONS.
//
Don’t forget to open and close your <?php ?> tags or nothing will work. You can also choose to show or not errors on the page, an option that can help you a lot before publishing your proxy as it explain on which line error where found and why exactly. For that you have to just add this : error_reporting(E_ALL);
Next thing will be to copy the full content (rest) of the source index file, don’t touch to anything into it, even a simple point (.) can make all your proxy not working, so take care of what you modify !
The result of we have created until now will give us something like this screenshot (Our version is clean of CSS and design) :
Now, just save your file and create another new one, which will be also the last one (and yes ! two files can create a powerful proxy server !). The new file will be named index.inc.php. It will contain the front office part (what visitor will see) and the HTML tags.
We will start it by the header :
<!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>My New Proxy</title>
</head>
You can change the title of corse and add any header meta tag you want, as long it don’t call PHP problem makers 
For next part, I will just put comments between things to not make this tutorial longer. You can copy paste it identical or modify it or even just delete my comments ! (Comment will be red and preceded by a /* sign)
<body onload=”document.getElementById(‘address_box’).focus()”> /* This will put the mouse of the visitor on the address box, by focusing the mouse on it.
<div id=”container”>
<h1 id=”title”>PHProxy</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” /> /* On submit, this will drive user to enter into the anonymous server, which start the proxy functionality.
</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.’;
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'] ?>”> /* This will post the form to same file, and start the proxy.
<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><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>
And now, we close opened tags :
</div>
</body>
</html>
That’s all ! You can now design your proxy server by adding some style on it and may be pictures ? Anyway, on this tutorial, there is not too much comments, I tried to make it as simple as I can, but it is already very simple to learn, functions are clear and very clean. You can ask me about any kind of help and I will try to reply with as much details as I can. Please don’t forget to download the full script from SourceForge as version of files there are may be newer and can be cleaner and easier if you just want to modify simple variables (described on top) and launch your Proxy !
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[...] Create your own Proxy server ! | Coffee Cup Break [...]
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[...] Create your own Proxy server ! | Coffee Cup Break [...]
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[...] Create your own Proxy server ! | Coffee Cup Break [...]
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[...] Create your own Proxy server ! | Coffee Cup Break [...]
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hii..
i want to build an http caching proxy server using java.
can u guid and help me..?
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Yes, contact me via the contact page and I’ll try to help as much as I can !
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