我想创建一个像应用程序一样的代理服务器，我可以从该服务器向服务器发送标题，并且响应会直接传递给客户端，并且不会使用所有服务器带宽。PHP通过代理
我能想到的唯一方法就是使用PHP cURL来做这件事，但这不起作用，因为它下载文件并将其发送到客户端。我想知道是否有办法消除或最小化使用的带宽。
我想要做什么： 客户端打开页面，按下载按钮，然后MY服务器向文件服务器请求文件（使用标题）并将其直接发送到客户端或MY服务器重定向到客户端。
这使用CURLOPT_BUFFERSIZE，CURLOPT_HEADERFUNCTION和CURLOPT_WRITEFUNCTION。
<?php
/*
* curl-pass-through-proxy.php
*
* propose: php curl pass through proxy handle: big file, https, autentication
* example: curl-pass-through-proxy.php?url=precise/ubuntu-12.04.4-desktop-i386.iso
* limitation: don't work on binary if is enabled in php.ini the ;output_handler = ob_gzhandler
* licence: BSD
*
* Copyright 2014 Gabriel Rota <[email protected]>
*
*/
$url = "http://releases.ubuntu.com/" . $_GET["url"]; // NOTE: this example don't use https
$credentials = "user:pwd";
$headers = array(
"GET ".$url." HTTP/1.1",
"Content-type: text/xml",
"Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
"Cache-Control: no-cache",
"Pragma: no-cache",
"Authorization: Basic " . base64_encode($credentials)
);
global $filename; // used in fn_CURLOPT_HEADERFUNCTION setting download filename
$filename = substr($url, strrpos($url, "/")+1); // find last/
function fn_CURLOPT_WRITEFUNCTION($ch, $str){
$len = strlen($str);
echo($str);
return $len;
}
function fn_CURLOPT_HEADERFUNCTION($ch, $str){
global $filename;
$len = strlen($str);
header($str);
//~ error_log("curl-pass-through-proxy:fn_CURLOPT_HEADERFUNCTION:str:".$str.PHP_EOL, 3, "/tmp/curl-pass-through-proxy.log");
if (strpos($str, "application/x-iso9660-image") !== false) {
header("Content-Disposition: attachment; filename=\"$filename\""); // set download filename
}
return $len;
}
$ch = curl_init(); // init curl resource
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, false); // a true curl_exec return content
curl_setopt($ch, CURLOPT_TIMEOUT, 600); // 60 second
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers); // login $url
curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); // don't check certificate
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // don't check certificate
curl_setopt($ch, CURLOPT_HEADER, false); // true Return the HTTP headers in string, no good with CURLOPT_HEADERFUNCTION
curl_setopt($ch, CURLOPT_BUFFERSIZE, 8192); // 8192 8k
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_HEADERFUNCTION, "fn_CURLOPT_HEADERFUNCTION"); // handle received headers
curl_setopt($ch, CURLOPT_WRITEFUNCTION, 'fn_CURLOPT_WRITEFUNCTION'); // callad every CURLOPT_BUFFERSIZE
if (! curl_exec($ch)) {
error_log("curl-pass-through-proxy:Error:".curl_error($ch).PHP_EOL, 3, "/tmp/curl-pass-through-proxy.log");
}
curl_close($ch); // close curl resource
?>
你打算如何计算发送给服务器的带宽，然后发送给客户端的服务器？热力学第一定律（当然是抽象的） – 2012-01-05 00:35:31
我对你的问题有点困惑。 “帐户”是什么意思？ （这不像我不知道这个词，但我在这方面不明白） – Memoria 2012-01-05 00:40:42
为什么不直接使用反向代理？ – Layke 2012-01-05 00:43:56