用PHP的Socket实现HTTP请求

xy123321

最近HTTP远程访问的程序写得多了，主要接触的是.NET类库里的WebHttpRequest类和Microsoft.XMLHTTP这个通用的对象，有了这些方便的类，我们可以通过C#，ASP，Javascript来模拟Web客户端访问其他的Web页面。但是今天想用PHP实现一下类似的功能，却一时找不到方向了，于是只能自己“丰衣足食”了。

目前，PHP里面还没有类似于HttpRequest的类，不过在官方在线文档中找到了这么一个HttpRequest Class的页面，不过也只是提及了此功能目前可能只有在CVS版本中存在，无奈...

要实现HTTP访问无非就是用Socket发送一个请求，然后读取返回信息。于是我就用Socket写了一个HttpRequest的类，当然也可以用fsockopen()这个函数来实现，不过两个的区别不是很大，具体代码在附件里，自己看咯。

<?php /**  * Network: HTTP request object  * Author: Li HouYu (Karajan Lee), Shanghai, China.  */  class HttpRequest { var $sHostAdd; var $sUri; var $iPort;  var $sRequestHeader;  var $sResponse;  function HttpRequest($sUrl) { $sPatternUrlPart = '/http:\/\/([a-z-\.0-9]+)(:(\d+)){0,1}(.*)/i'; $arMatchUrlPart = array(); preg_match($sPatternUrlPart, $sUrl, $arMatchUrlPart);  $this->sHostAdd = gethostbyname($arMatchUrlPart[1]); if (empty($arMatchUrlPart[4])) { $this->sUri = '/'; } else { $this->sUri = $arMatchUrlPart[4]; } if (empty($arMatchUrlPart[3])) { $this->iPort = 80; } else { $this->iPort = $arMatchUrlPart[3]; }  $this->addRequestHeader('Host: '.$arMatchUrlPart[1]); $this->addRequestHeader('Connection: Close'); }  function addRequestHeader($sHeader) { $this->sRequestHeader .= trim($sHeader)."\r\n"; }  function sendRequest($sMethod = 'GET', $sPostData = '') { $sRequest = $sMethod." ".$this->sUri." HTTP/1.1\r\n"; $sRequest .= $this->sRequestHeader; if ($sMethod == 'POST') { $sRequest .= "Content-Type: application/x-www-form-urlencoded\r\n"; $sRequest .= "Content-Length: ".strlen($sPostData)."\r\n"; $sRequest .= "\r\n"; $sRequest .= $sPostData."\r\n"; } $sRequest .= "\r\n";  $sockHttp = socket_create(AF_INET, SOCK_STREAM, SOL_TCP); if (!$sockHttp) { die('socket_create() failed!'); }  $resSockHttp = socket_connect($sockHttp, $this->sHostAdd, $this->iPort); if (!$resSockHttp) { die('socket_connect() failed!'); }  socket_write($sockHttp, $sRequest, strlen($sRequest));  $this->sResponse = ''; while ($sRead = socket_read($sockHttp, 4096)) { $this->sResponse .= $sRead; }  socket_close($sockHttp); }  function getResponse() { return $this->sResponse; }  function getResponseBody() { $sPatternSeperate = '/\r\n\r\n/'; $arMatchResponsePart = preg_split($sPatternSeperate, $this->sResponse, 2); return $arMatchResponsePart[1]; }  function getResponseHead() { $sPatternSeperate = '/\r\n\r\n/'; $arMatchResponsePart = preg_split($sPatternSeperate, $this->sResponse, 2); return $arMatchResponsePart[0]; } } ?>