A simple stream-based http client. Good for experimentation.

httpget

#!/usr/bin/php
<?php

$scheme='tcp';
$host='www.kernel.org';
$port=80;
$path='/';

if(isset($argv[1])) {
	$parsedUrl=parse_url($argv[1]);
	$scheme=($parsedUrl['scheme']=='https')?'ssl':'tcp';
	$port=isset($parsedUrl['port'])?$parsedUrl['port']:getservbyname($parsedUrl['scheme'],'tcp');
	$host=$parsedUrl['host'];
	if(isset($parsedUrl['path']))
		if($path{0}!='/')
			$path='/'.$path;
	else
		$path='/';
	if(isset($parsedUrl['query']))
		$path.='?'.$parsedUrl['query'];
}

if(($socket=@stream_socket_client("$scheme://$host:$port", $errno, $errstr, 1, STREAM_CLIENT_CONNECT))===false)
	die("Error creating stream ({$errno}): {$errstr}");

$headers=array(
	"GET {$path} HTTP/1.1",
	"Host: {$host}:{$port}",
	'Accept: text/html, application/xhtml+xml, text/*',
	'Accept-Language: *',
	'Accept-Encoding: gzip, deflate, bzip2',
	'TE: chunked',
	'User-Agent: Mozilla/5.0 (compatible)',
	"Connection: close\r\n\r\n",
);

fwrite($socket,implode("\r\n",$headers));

$chunked=false;
$encoding=false;

while(($line=fgets($socket))!==false && !feof($socket) && trim($line)!='') {
	if(stripos($line, 'Content-Encoding')===0)
		$encoding=trim(end(explode(':', $line, 2)));
	elseif(stripos($line, 'Transfer-Encoding')===0)
		$chunked=(strcasecmp(trim(end(explode(':', $line, 2))),'chunked')===0);
	echo $line;
}

echo PHP_EOL;

$output=fopen('php://output','w');

if($chunked)
	stream_filter_append($output, 'dechunk', STREAM_FILTER_WRITE);

if($encoding) {
	switch($encoding) {
		case 'identity':
			break;
		case 'bzip2':
			stream_filter_append($output, 'bzip2.decompress', STREAM_FILTER_WRITE);
			break;
		case 'gzip':
			fseek($socket, 10, SEEK_CUR);
		case 'deflate':
			stream_filter_append($output, 'zlib.inflate', STREAM_FILTER_WRITE);
			break;
		default:
			die("Unknown content encoding: {$encoding}");
	}
}

while(!feof($socket))
	fwrite($output,fread($socket,16384));

fclose($socket);
fclose($output);