Improve HTTP GET PHP scripts - php

Question

This code is getting the headers and content from $url, and prints it to the browser. It is really slow, and it's not because the server. How can I improve this?
$headers = get_headers($url);
foreach ($headers as $value)
header($value);
$fh = fopen($url, "r");
fpassthru($fh);
Thanks

Answer 1

Why make two requests when one will do?
$fh = fopen($url, 'r');
foreach ($http_response_header as $value) {
header($value);
}
fpassthru($fh);
Or:
$content = file_get_contents($url);
foreach ($http_response_header as $value) {
header($value);
}
echo $content;

Answer 2

I'm not sure why you're opening a connection there on line 6 if you already have and have printed out the headers. Is this doing more than printing out headers?

Answer 3

If you are really looking to just proxy a page, the cURL functions are much more efficient:
<?
$curl = curl_init("http://www.google.com");
curl_setopt($curl, CURLOPT_HEADER, true);
curl_exec($curl);
curl_close($curl);
?>
Of course, cURL has to be enabled on your server, but it's not uncommon.

Answer 4

Are you trying to make a proxy? If so, here is a recipe, in proxy.php:
<?php
$host = 'example.com';
$port = 80;
$page = $_SERVER['REQUEST_URI'];
$conn = fsockopen($host, $port, $errno, $errstr, 180);
if (!$conn) throw new Exception("$errstr ($errno)");
$hbase = array();
$hbase[] = 'User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)';
if (!empty($_SERVER['HTTP_REFERER'])) $hbase[] = 'Referer: '.str_ireplace($_SERVER['HTTP_HOST'], $host, $_SERVER['HTTP_REFERER']);
if (!empty($_SERVER['HTTP_COOKIE'])) $hbase[] = 'Cookie: '.$_SERVER['HTTP_COOKIE'];
$hbase = implode("\n", $hbase);
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
$post = file_get_contents("php://input");
$length = strlen($post);
$request = "POST $page HTTP/1.0\nHost: $host\n$hbase\nContent-Type: application/x-www-form-urlencoded\nContent-Length: $length\n\n$post";
} else $request = "GET $page HTTP/1.0\nHost: $host\n$hbase\n\n";
do {
$conn = fsockopen($host, 80, $errno, $errstr, 180);
if (!$conn) throw new Exception("$errstr ($errno)");
fputs($conn, $request);
$header = false;
$body = false;
stream_set_blocking($conn, false);
$info = stream_get_meta_data($conn);
while (!feof($conn) && !$info['timed_out']) {
$str = fgets($conn);
if (!$str) {
usleep(50000);
continue;
}
if ($body !== false) $body .= $str;
else $header .= $str;
if ($body === false && $str == "\r\n") $body = '';
$info = stream_get_meta_data($conn);
}
fclose($conn);
} while ($info['timed_out']);
$header = str_ireplace($host, $_SERVER['HTTP_HOST'], $header);
if (stripos($body, $host) !== false) $body = str_ireplace($host, $_SERVER['HTTP_HOST'], $body);
$header = str_replace('domain=.example.com; ', '', $header);
$header_array = explode("\r\n", $header);
foreach ($header_array as $line) header($line);
if (strpos($header, 'Content-Type: text') !== false) {
$body = str_replace('something', '', $body);
}
echo $body;
In .htaccess:
Options +FollowSymlinks
RewriteEngine on
RewriteBase /
RewriteRule ^(.*)$ proxy.php [QSA,L]

Answer 5

You may be able to pinpoint the slowness by changing $url to a know fast site, or even a local webserver. The only thing that seems to be possible is a slow response from the server.
Of course as suggested by GZipp, if you're going to output the file contents as well, just do it with a single request. That would make the server you're requesting from happier.