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
