fsockopen() Wrapper

[ricky92]

I'm trying to make a PHP wrapper to manage web requests, but the code I wrote doesn't work at all. I always get an error when trying to connect (I'm using WAMP on my computer). I enabled allow_url_fopen, but it still doesn't work. Can someone help me? Here's the code:

<?php
	class Wrapper {

	var $timeout = 3000;
	var $useragent = "Mozilla/5.0 (Windows; U; Windows NT 6.0; en-GB; rv:1.8.1.8) Gecko/20071008 Firefox/2.0.0.8";
	var $usegzip = true;
	var $cookies;

	function Get($url, $referer = '') {
		$host = (substr($url, 0, 7) == 'http://') ? (substr($url, 7, (strpos($url, '/', 8) ? strpos($url, '/', 8) : strlen($url)) - 7)) : (substr($url, 0, strpos($url, '/', 0) ? strpos($url, '/', 0) : strlen($url)));
		$location = substr($url, strpos($url, $host) + strlen($host), strlen($url) - strpos($url, $host));
		if ($location == '') $location = '/';

		$stream = @fsockopen($host, 80, $errnum, $errstring, $timeout);

		if (!$stream) {
			echo "Error #$errnum<br>\r\nConnection Failed: $errstring";
			return false;
		} else {
			$headers = "GET $location HTTP/1.1\r\n";
			$headers.= "Host: $host\r\n";
			$headers.= "User-Agent: $useragent\r\n";
			$headers.= "Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5\r\n";
			$headers.= "Accept-Language: en-gb,en;q=0.5\r\n";
			$headers.= "Accept-Encoding: gzip,deflate\r\n";
			$headers.= "Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7\r\n";
			$headers.= "Keep-Alive: 300\r\n";
			$headers.= "Connection: keep-alive\r\n";
			if ($referer != '') $headers.= "Referer: $referer\r\n";
			$headers.= "Cookie: $cookies\r\n\r\n";

			fputs($stream, $headers);

			$buffer = '';

			while (!feof($stream)) {
				$buffer.= fgets($stream, 256);
			}

			return $buffer;
		}
	}

	function Post($url, $postdata, $referer = '') {
		$host = (substr($url, 0, 7) == 'http://') ? (substr($url, 7, (strpos($url, '/', 8) ? strpos($url, '/', 8) : strlen($url)) - 7)) : (substr($url, 0, strpos($url, '/', 0) ? strpos($url, '/', 0) : strlen($url)));
		$location = substr($url, strpos($url, $host) + strlen($host), strlen($url) - strpos($url, $host));
		if ($location == '') $location = '/';

		$stream = @fsockopen($host, 80, $errnum, $errstring, $timeout);

		if (!$stream) {
			echo "Error #$errnum<br>\r\nConnection Failed: $errstring";
			return false;
		} else {			
			$headers = "POST $location HTTP/1.1\r\n";
			$headers.= "Host: $host\r\n";
			$headers.= "User-Agent: $useragent\r\n";
			$headers.= "Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5\r\n";
			$headers.= "Accept-Language: en-gb,en;q=0.5\r\n";
			$headers.= "Accept-Encoding: gzip,deflate\r\n";
			$headers.= "Content-Length: ".strlen($postdata)."\r\n";
			$headers.= "Content-Type: application/x-www-form-urlencoded\r\n";
			$headers.= "Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7\r\n";
			$headers.= "Keep-Alive: 300\r\n";
			$headers.= "Connection: keep-alive\r\n";
			if ($referer != '') $headers.= "Referer: $referer\r\n";
			$headers.= "Cookie: $cookies\r\n\r\n";

			$headers.= $postdata;

			fputs($stream, $headers);

			$buffer = '';

			while (!feof($stream)) {
				$buffer.= fgets($stream, 256);
			}

			return $buffer;
		}
	}
}

$w = new Wrapper();

echo $w->Get("http://www.google.com/");
?>

I also don't know how to retrieve the Response headers, to handle the cookies. Could someone please help me?

ricky92

[MarkR]

You are significantly re-inventing the wheel. The functionality is already in PHP and works very well. Countless other implementations are available.

That said, if none of them does what you want, you can always read the HTTP specification in the relevant RFCs. All the information is in the public domain.

I'd start by implementing HTTP 1.0 first, it's much easier. Every implementation of 1.1 that I've seen posted here is wrong.

Mark

[ricky92]

MarkR wrote:

You are significantly re-inventing the wheel. The functionality is already in PHP and works very well. Countless other implementations are available.

That said, if none of them does what you want, you can always read the HTTP specification in the relevant RFCs. All the information is in the public domain.

I'd start by implementing HTTP 1.0 first, it's much easier. Every implementation of 1.1 that I've seen posted here is wrong.

Mark

I'm making a wrapper to simulate referers and such things, but also to learn to code classes. However I'll try using HTTP 1.0 but isn't it alot slower? 😕

[MarkR]

HTTP 1.0 is no slower if you don't use keep-alive connections. Moreover, the code is vastly simpler as you don't need to parse chunked responses, which HTTP 1.1 absolutely MANDATES (Yes, I know many stupid, broken, naive implementations ignore this in the specification).

Read the RFCs and you will see.

Every third party implementation, including the one in PHP and CURL, allows you to set whatever headers to whatever you like.

Mark

[StewardManscat]

MarkR wrote:

You are significantly re-inventing the wheel. The functionality is already in PHP and works very well. Countless other implementations are available.
Mark

A link to some sample snippets would be great.