php socket请求,PHP SOCKET模拟HTTP请求

function http_request($url, $type = "GET", $post_data = NULL) { $type = strtoupper($type); $http_info = array(); $url2 = parse_url($url); if(($socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) < 0) { return false; } //set socket timeout socket_set_option($socket, SOL_SOCKET, SO_SNDTIMEO, array("sec"=>1, "usec"=>0)); $url2["path"] = ($url2["path"] == "" ? "/" : $url2["path"]); $url2["port"] = ($url2["port"] == "" ? 80 : $url2["port"]); $host_ip = http_get_host_ip($url2["host"]); if(($result = socket_connect($socket, $host_ip, $url2["port"])) < 0) { socket_close($socket); return false; } $request =  $url2["path"] . ($url2["query"] != "" ? "?" . $url2["query"] : "") . ($url2["fragment"] != "" ? "#" . $url2["fragment"] : ""); if($type == "GET") {//GET method $in = "GET " . $request . " HTTP/1.1\r\n"; $in .= "Accept: */*\r\n"; $in .= "User-Agent: Lowell-Agent\r\n"; $in .= "Host: " . $url2["host"] . "\r\n"; $in .= "Connection: Close\r\n\r\n"; if(!socket_write($socket, $in, strlen($in))) { socket_close($socket); return false; } unset($in); } else if($type == "POST") {//POST method //build post data $needChar = false; foreach($post_data as $key => $val) { $post_data2 .= ($needChar ? "&" : "") . urlencode($key) . "=" . urlencode($val); $needChar = true; } $in = "POST " . $request . " HTTP/1.1\r\n"; $in .= "Accept: */*\r\n"; $in .= "Host: " . $url2["host"] . "\r\n"; $in .= "User-Agent: Lowell-Agent\r\n"; $in .= "Content-type: application/x-www-form-urlencoded\r\n"; $in .= "Content-Length: " . strlen($post_data2) . "\r\n"; $in .= "Connection: Close\r\n\r\n"; $in .= $post_data2 . "\r\n\r\n"; unset($post_data2); if(!@socket_write($socket, $in, strlen($in))) { socket_close($socket); return false; } unset($in); } else {//unknowd method //trigger_error("Unknowd method", E_USER_ERROR); exit; } //process response $out = ""; while($buff = @socket_read($socket, 2048)) { $out .= $buff; } //finish socket socket_close($socket); $pos = strpos($out, "\r\n\r\n"); $head = substr($out, 0, $pos); //http head $status = substr($head, 0, strpos($head, "\r\n")); //http status line $body = substr($out, $pos + 4, strlen($out) - ($pos + 4)); //page body if(preg_match("/^HTTP\/\d\.\d\s([\d]+)\s.*$/", $status, $matches)) { if(intval($matches[1]) / 100 == 2) { return $body; }else{ return false; } }else{ return false; } }