PHP实反向代理-收藏

时间：2023-03-05 15:40:26

需求

　　现在有些后辍的域名不支持备案，这个时候需要用免备案主机或空间做个反向代理，这样可实现内容存放在国内主机统一管理

实现

　　用 php-dynamic-mirror 可实现，并在头部进行域名转换，可实现多个域名反向代理到不同的站点，一共两个文件简单方便，做个收藏

　　index.php

　　

<?php

$domain = $_SERVER['SERVER_NAME'];

$mirror = "www.mz.cn";

switch ($domain)

{

case "www.a.cn":

  $mirror = "www.az.cn";

  break;

case "www.b.com.cn":

  $mirror = "www.bz.com";

  break;

default:

  $mirror = "www.mz.cn";

}

$req = $_SERVER['REQUEST_METHOD'] . ' ' . $_SERVER['REQUEST_URI'] . " HTTP/1.0\r\n";

$length = 0;

foreach ($_SERVER as $k => $v) {

    if (substr($k, 0, 5) == "HTTP_") {

        $k = str_replace('_', ' ', substr($k, 5));

        $k = str_replace(' ', '-', ucwords(strtolower($k)));

        if ($k == "Host")

            $v = $mirror;                        # Alter "Host" header to mirrored server

        if ($k == "Accept-Encoding")

            $v = "identity;q=1.0, *;q=0";        # Alter "Accept-Encoding" header to accept unencoded content only

        if ($k == "Keep-Alive")

            continue;                            # Drop "Keep-Alive" header

        if ($k == "Connection" && $v == "keep-alive")

            $v = "close";                        # Alter value of "Connection" header from "keep-alive" to "close"

        $req .= $k . ": " . $v . "\r\n";

    }

}

$body = @file_get_contents('php://input');

$req .= "Content-Type: " . $_SERVER['CONTENT_TYPE'] . "\r\n";

$req .= "Content-Length: " . strlen($body) . "\r\n";

$req .= "\r\n";

$req .= $body;

#print $req;

$fp = fsockopen($mirror, 80, $errno, $errmsg, 30);

if (!$fp) {

    print "HTTP/1.0 502 Failed to connect remote server\r\n";

    print "Content-Type: text/html\r\n\r\n";

    print "<html><body>Failed to connect to $mirror due to:<br>[$errno] $errstr</body></html>";

    exit;

}

fwrite($fp, $req);

$headers_processed = 0;

$reponse = '';

while (!feof($fp)) {

    $r = fread($fp, 8192);

    if (!$headers_processed) {

        $response .= $r;

        $nlnl = strpos($response, "\r\n\r\n");

        $add = 4;

        if (!$nlnl) {

            $nlnl = strpos($response, "\n\n");

            $add = 2;

        }

        if (!$nlnl)

            continue;

        $headers = substr($response, 0, $nlnl);

        $cookies = 'Set-Cookie: ';

        if (preg_match_all('/^(.*?)(\r?\n|$)/ims', $headers, $matches))

            for ($i = 0; $i < count($matches[0]); ++$i) {

                $ct = $matches[1][$i];

#                if (substr($ct, 0, 12) == "Set-Cookie: ") {

#                    $cookies .= substr($ct, 12) . ',';

#                    header($cookies);

#                } else

                    header($ct, false);

#                print '>>' . $ct . "\r\n";

            }

        print substr($response, $nlnl + $add);

        $headers_processed = 1;

    } else

        print $r;

}

fclose ($fp);

?>

.htaccess

<IfModule mod_rewrite.c>

　　RewriteEngine On

　　RewriteBase /

　　RewriteCond %{REQUEST_FILENAME} !-f

　　RewriteCond %{REQUEST_FILENAME} !-d

　　RewriteRule . /index.php [L]

</IfModule>

文件

　　文件下载

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