我想創建一個像應用程序一樣的代理服務器，我可以從該服務器向服務器發送標題，並且響應會直接傳遞給客戶端，並且不會使用所有服務器帶寬。PHP通過代理
我能想到的唯一方法就是使用PHP cURL來做這件事，但這不起作用，因爲它下載文件並將其發送到客戶端。我想知道是否有辦法消除或最小化使用的帶寬。
我想要做什麼： 客戶端打開頁面，按下載按鈕，然後MY服務器向文件服務器請求文件（使用標題）並將其直接發送到客戶端或MY服務器重定向到客戶端。
這使用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
?>
你打算如何計算髮送給服務器的帶寬，然後發送給客戶端的服務器？熱力學第一定律（當然是抽象的） – 2012-01-05 00:35:31
我對你的問題有點困惑。 「帳戶」是什麼意思？ （這不像我不知道這個詞，但我在這方面不明白） – Memoria 2012-01-05 00:40:42
爲什麼不直接使用反向代理？ – Layke 2012-01-05 00:43:56