index.php

可以实现访问一些国内不能访问的站也能访问上

        unset($_response_headers['keep-alive'], $_response_keys['keep-alive']);
    }
    if ($_response_code == 401 && isset($_response_headers['www-authenticate']) && preg_match('#basic\s+(?:realm="(.*?)")?#i', $_response_headers['www-authenticate'][0], $matches))
    {
        if (isset($_auth_creds[$matches[1]]) && !$_quit)
        {
            $_basic_auth_realm  = $matches[1];
            $_basic_auth_header = '';
            $_retry = $_quit = true;
        }
        else
        {
            show_report(array('which' => 'index', 'category' => 'auth', 'realm' => $matches[1]));
        }
    }
}
while ($_retry);

//
// OUTPUT RESPONSE IF NO PROXIFICATION IS NEEDED
//  

if (!isset($_proxify[$_content_type]))
{
    @set_time_limit(0);
   
    $_response_keys['content-disposition'] = 'Content-Disposition';
    $_response_headers['content-disposition'][0] = empty($_content_disp) ? ($_content_type == 'application/octet_stream' ? 'attachment' : 'inline') . '; filename="' . $_url_parts['file'] . '"' : $_content_disp;
    
    if ($_content_length !== false)
    {
        if ($_config['max_file_size'] != -1 && $_content_length > $_config['max_file_size'])
        {
            show_report(array('which' => 'index', 'category' => 'error', 'group' => 'resource', 'type' => 'file_size'));
        }
        
        $_response_keys['content-length'] = 'Content-Length';
        $_response_headers['content-length'][0] = $_content_length;
    }
    
    $_response_headers   = array_filter($_response_headers);
    $_response_keys      = array_filter($_response_keys);
    
    header(array_shift($_response_keys));
    array_shift($_response_headers);
    
    foreach ($_response_headers as $name => $array)
    {
        foreach ($array as $value)
        {
            header($_response_keys[$name] . ': ' . $value, false);
        }
    }
        
    do
    {
        $data = fread($_socket, 8192);
        echo $data;
    }
    while (isset($data{0}));
        
    fclose($_socket);
    exit(0);
}

do
{
    $data = @fread($_socket, 8192); // silenced to avoid the "normal" warning by a faulty SSL connection
    $_response_body .= $data;
}   
while (isset($data{0}));
   
unset($data);
fclose($_socket);

//
// MODIFY AND DUMP RESOURCE
//

if ($_content_type == 'text/css')
{
    $_response_body = proxify_css($_response_body);
}
else
{
    if ($_flags['strip_title'])
    {
        $_response_body = preg_replace('#(<\s*title[^>]*>)(.*?)(<\s*/title[^>]*>)#is', '$1$3', $_response_body);
    }
    if ($_flags['remove_scripts'])
    {
        $_response_body = preg_replace('#<\s*script[^>]*?>.*?<\s*/\s*script\s*>#si', '', $_response_body);
        $_response_body = preg_replace("#(\bon[a-z]+)\s*=\s*(?:\"([^\"]*)\"?|'([^']*)'?|([^'\"\s>]*))?#i", '', $_response_body);
        $_response_body = preg_replace('#<noscript>(.*?)</noscript>#si', "$1", $_response_body);
    }
    if (!$_flags['show_images'])
    {
        $_response_body = preg_replace('#<(img|image)[^>]*?>#si', '', $_response_body);
    }
    
    //
    // PROXIFY HTML RESOURCE
    //
    
    $tags = array
    (
        'a'          => array('href'),
        'img'        => array('src', 'longdesc'),
        'image'      => array('src', 'longdesc'),
        'body'       => array('background'),
        'base'       => array('href'),
        'frame'      => array('src', 'longdesc'),
        'iframe'     => array('src', 'longdesc'),
        'head'       => array('profile'),
        'layer'      => array('src'),
        'input'      => array('src', 'usemap'),
        'form'       => array('action'),
        'area'       => array('href'),
        'link'       => array('href', 'src', 'urn'),
        'meta'       => array('content'),
        'param'      => array('value'),
        'applet'     => array('codebase', 'code', 'object', 'archive'),
        'object'     => array('usermap', 'codebase', 'classid', 'archive', 'data'),
        'script'     => array('src'),
        'select'     => array('src'),
        'hr'         => array('src'),
        'table'      => array('background'),
        'tr'         => array('background'),
        'th'         => array('background'),
        'td'         => array('background'),
        'bgsound'    => array('src'),
        'blockquote' => array('cite'),
        'del'        => array('cite'),
        'embed'      => array('src'),
        'fig'        => array('src', 'imagemap'),
        'ilayer'     => array('src'),
        'ins'        => array('cite'),
        'note'       => array('src'),
        'overlay'    => array('src', 'imagemap'),
        'q'          => array('cite'),
        'ul'         => array('src')
    );

    preg_match_all('#(<\s*style[^>]*>)(.*?)(<\s*/\s*style[^>]*>)#is', $_response_body, $matches, PREG_SET_ORDER);

    for ($i = 0, $count_i = count($matches); $i < $count_i; ++$i)
    {
        $_response_body = str_replace($matches[$i][0], $matches[$i][1]. proxify_css($matches[$i][2]) .$matches[$i][3], $_response_body);
    }

    preg_match_all("#<\s*([a-zA-Z\?-]+)([^>]+)>#S", $_response_body, $matches);

    for ($i = 0, $count_i = count($matches[0]); $i < $count_i; ++$i)
    {
        if (!preg_match_all("#([a-zA-Z\-\/]+)\s*(?:=\s*(?:\"([^\">]*)\"?|'([^'>]*)'?|([^'\"\s]*)))?#S", $matches[2][$i], $m, PREG_SET_ORDER))
        {
            continue;
        }
        
        $rebuild    = false;
        $extra_html = $temp = '';
        $attrs      = array();

        for ($j = 0, $count_j = count($m); $j < $count_j; $attrs[strtolower($m[$j][1])] = (isset($m[$j][4]) ? $m[$j][4] : (isset($m[$j][3]) ? $m[$j][3] : (isset($m[$j][2]) ? $m[$j][2] : false))), ++$j);
        
        if (isset($attrs['style']))
        {
            $rebuild = true;
            $attrs['style'] = proxify_inline_css($attrs['style']);
        }
        
        $tag = strtolower($matches[1][$i]);

        if (isset($tags[$tag]))
        {
            switch ($tag)
            {
                case 'a':
                    if (isset($attrs['href']))
                    {
                        $rebuild = true;
                        $attrs['href'] = complete_url($attrs['href']);
                    }
                    break;
                case 'img':
                    if (isset($attrs['src']))
                    {
                        $rebuild = true;
                        $attrs['src'] = complete_url($attrs['src']);
                    }
                    if (isset($attrs['longdesc']))
                    {
                        $rebuild = true;
                        $attrs['longdesc'] = complete_url($attrs['longdesc']);
                    }
                    break;
                case 'form':
                    if (isset($attrs['action']))
                    {
                        $rebuild = true;
                        
                        if (trim($attrs['action']) === '')
                        {
                            $attrs['action'] = $_url_parts['path'];
                        }
                        if (!isset($attrs['method']) || strtolower(trim($attrs['method'])) === 'get')
                        {
                            $extra_html = '<input type="hidden" name="' . $_config['get_form_name'] . '" value="' . encode_url(complete_url($attrs['action'], false)) . '" />';
                            $attrs['action'] = '';
                            break;
                        }
                        
                        $attrs['action'] = complete_url($attrs['action']);
                    }
                    break;
                case 'base':
                    if (isset($attrs['href']))
                    {
                        $rebuild = true;  
                        url_parse($attrs['href'], $_base);
                        $attrs['href'] = complete_url($attrs['href']);
                    }
                    break;
                case 'meta':
                    if ($_flags['strip_meta'] && isset($attrs['name']))
                    {
                        $_response_body = str_replace($matches[0][$i], '', $_response_body);
                    }
                    if (isset($attrs['http-equiv'], $attrs['content']) && preg_match('#\s*refresh\s*#i', $attrs['http-equiv']))
                    {
                        if (preg_match('#^(\s*[0-9]*\s*;\s*url=)(.*)#i', $attrs['content'], $content))
                        {                 
                            $rebuild = true;
                            $attrs['content'] =  $content[1] . complete_url(trim($content[2], '"\''));
                        }
                    }
                    break;
                case 'head':
                    if (isset($attrs['profile']))
                    {
                        $rebuild = true;
                        $attrs['profile'] = implode(' ', array_map('complete_url', explode(' ', $attrs['profile'])));
                    }
                    break;
                case 'applet':
                    if (isset($attrs['codebase']))
                    {
                        $rebuild = true;
                        $temp = $_base;
                        url_parse(complete_url(rtrim($attrs['codebase'], '/') . '/', false), $_base);
                        unset($attrs['codebase']);
                    }
                    if (isset($attrs['code']) && strpos($attrs['code'], '/') !== false)
                    {
                        $rebuild = true;
                        $attrs['code'] = complete_url($attrs['code']);
                    }
                    if (isset($attrs['object']))
                    {
                        $rebuild = true;
                        $attrs['object'] = complete_url($attrs['object']);
                    }
                    if (isset($attrs['archive']))
                    {
                        $rebuild = true;
                        $attrs['archive'] = implode(',', array_map('complete_url', preg_split('#\s*,\s*#', $attrs['archive'])));
                    }
                    if (!empty($temp))
                    {
                        $_base = $temp;
                    }
                    break;
                case 'object':
                    if (isset($attrs['usemap']))
                    {
                        $rebuild = true;
                        $attrs['usemap'] = complete_url($attrs['usemap']);
                    }
                    if (isset($attrs['codebase']))
                    {
                        $rebuild = true;
                        $temp = $_base;
                        url_parse(complete_url(rtrim($attrs['codebase'], '/') . '/', false), $_base);
                        unset($attrs['codebase']);
                    }
                    if (isset($attrs['data']))
                    {
                        $rebuild = true;
                        $attrs['data'] = complete_url($attrs['data']);
                    }
                    if (isset($attrs['classid']) && !preg_match('#^clsid:#i', $attrs['classid']))
                    {
                        $rebuild = true;
                        $attrs['classid'] = complete_url($attrs['classid']);
                    }
                    if (isset($attrs['archive']))
                    {
                        $rebuild = true;
                        $attrs['archive'] = implode(' ', array_map('complete_url', explode(' ', $attrs['archive'])));
                    }
                    if (!empty($temp))
                    {
                        $_base = $temp;
                    }
                    break;
                case 'param':
                    if (isset($attrs['valuetype'], $attrs['value']) && strtolower($attrs['valuetype']) == 'ref' && preg_match('#^[\w.+-]+://#', $attrs['value']))
                    {
                        $rebuild = true;
                        $attrs['value'] = complete_url($attrs['value']);
                    }
                    break;
                case 'frame':
                case 'iframe':
                    if (isset($attrs['src']))
                    {
                        $rebuild = true;
                        $attrs['src'] = complete_url($attrs['src']) . '&nf=1';
                    }
                    if (isset($attrs['longdesc']))
                    {
                        $rebuild = true;
                        $attrs['longdesc'] = complete_url($attrs['longdesc']);
                    }
                    break;
                default:
                    foreach ($tags[$tag] as $attr)
                    {
                        if (isset($attrs[$attr]))
                        {
                            $rebuild = true;
                            $attrs[$attr] = complete_url($attrs[$attr]);
                        }
                    }
                    break;
            }
        }
    
        if ($rebuild)
        {
            $new_tag = "<$tag";
            foreach ($attrs as $name => $value)
            {
                $delim = strpos($value, '"') && !strpos($value, "'") ? "'" : '"';
                $new_tag .= ' ' . $name . ($value !== false ? '=' . $delim . $value . $delim : '');
            }

            $_response_body = str_replace($matches[0][$i], $new_tag . '>' . $extra_html, $_response_body);
        }
    }
    
    if ($_flags['include_form'] && !isset($_GET['nf']))
    {
        $_url_form      = '<div style="width:100%;margin:0;text-align:center;border-bottom:1px solid #725554;color:#000000;background-color:#F2FDF3;font-size:12px;font-weight:bold;font-family:Bitstream Vera Sans,arial,sans-serif;padding:4px;">'
                        . '<form method="post" action="' . $_script_url . '">'
                        . ' <label for="____' . $_config['url_var_name'] . '"><a href="' . $_url . '">网址</a>:</label> <input id="____' . $_config['url_var_name'] . '" type="text" size="80" name="' . $_config['url_var_name'] . '" value="' . $_url . '" />'
                        . ' <input type="submit" name="go" value="浏览" />'
                        . ' [<a href="' . $_script_url . '?' . $_config['url_var_name'] . '=' . encode_url($_url_parts['prev_dir']) .' ">返回</a>, <a href="' . $_script_base . '">首页</a>]'
                        . '<br /><hr />';

        foreach ($_flags as $flag_name => $flag_value)
        {
            if (!$_frozen_flags[$flag_name])
            {
                $_url_form .= '<label><input type="checkbox" name="' . $_config['flags_var_name'] . '[' . $flag_name . ']"' . ($flag_value ? ' checked="checked"' : '') . ' /> ' . $_labels[$flag_name][0] . '</label> ';
            }
        }

        $_url_form .= '</form></div>';
        $_response_body = preg_replace('#\<\s*body(.*?)\>#si', "$0\n$_url_form" , $_response_body, 1);
    }
}

$_response_keys['content-disposition'] = 'Content-Disposition';
$_response_headers['content-disposition'][0] = empty($_content_disp) ? ($_content_type == 'application/octet_stream' ? 'attachment' : 'inline') . '; filename="' . $_url_parts['file'] . '"' : $_content_disp;
$_response_keys['content-length'] = 'Content-Length';
$_response_headers['content-length'][0] = strlen($_response_body);    
$_response_headers   = array_filter($_response_headers);
$_response_keys      = array_filter($_response_keys);

header(array_shift($_response_keys));
array_shift($_response_headers);

foreach ($_response_headers as $name => $array)
{
    foreach ($array as $value)
    {
        header($_response_keys[$name] . ': ' . $value, false);
    }
}

echo $_response_body;
?>