php实现httpRequest的方法


            本文实例讲述了php实现httpRequest的方法。分享给大家供大家参考。具体如下：

想从学校图书馆的网站上抓取数据处理之后在返回给浏览器，试了不少方法。首先试了http_request()，但是这个学院pecl_http支持，后来又试了网上流传甚广的class HttpRequest，可能是我不会使用，也失败了。后来看到了函数httpRequest($url, $post='', $method='GET', $limit=0, $returnHeader=FALSE, $cookie='', $bysocket=FALSE, $ip='', $timeout=15, $block=TRUE)，用它成功了，因此贴出来分享一下。函数代码如下：

复制代码 代码如下:<?php  

    /** 

    * Respose A Http Request 

    * 

    * @param string $url 

    * @param array $post 

    * @param string $method 

    * @param bool $returnHeader 

    * @param string $cookie 

    * @param bool $bysocket 

    * @param string $ip 

    * @param integer $timeout 

    * @param bool $block 

    * @return string Response 

    */  

    function httpRequest($url,$post='',$method='GET',$limit=0,$returnHeader=FALSE,$cookie='',$bysocket=FALSE,$ip='',$timeout=15,$block=TRUE) {  

       $return = '';  

       $matches = parse_url($url);  

       !isset($matches['host']) && $matches['host'] = '';  

       !isset($matches['path']) && $matches['path'] = '';  

       !isset($matches['query']) && $matches['query'] = '';  

       !isset($matches['port']) && $matches['port'] = '';  

       $host = $matches['host'];  

       $path = $matches['path'] ? $matches['path'].($matches['query'] ? '?'.$matches['query'] : '') : '/';  

       $port = !empty($matches['port']) ? $matches['port'] : 80;  

       if(strtolower($method) == 'post') {  

           $post = (is_array($post) and !empty($post)) ? http_build_query($post) : $post;  

           $out = "POST $path HTTP/1.0\r\n";  

           $out .= "Accept: */*\r\n";  

           //$out .= "Referer: $boardurl\r\n";  

           $out .= "Accept-Language: zh-cn\r\n";  

           $out .= "Content-Type: application/x-www-form-urlencoded\r\n";  

           $out .= "User-Agent: $_SERVER[HTTP_USER_AGENT]\r\n";  

           $out .= "Host: $host\r\n";  

           $out .= 'Content-Length: '.strlen($post)."\r\n";  

           $out .= "Connection: Close\r\n";  

           $out .= "Cache-Control: no-cache\r\n";  

           $out .= "Cookie: $cookie\r\n\r\n";  

           $out .= $post;  

       } else {  

           $out = "GET $path HTTP/1.0\r\n";  

           $out .= "Accept: */*\r\n";  

           //$out .= "Referer: $boardurl\r\n";  

           $out .= "Accept-Language: zh-cn\r\n";  

           $out .= "User-Agent: $_SERVER[HTTP_USER_AGENT]\r\n";  

           $out .= "Host: $host\r\n";  

           $out .= "Connection: Close\r\n";  

           $out .= "Cookie: $cookie\r\n\r\n";  

       }  

       $fp = fsockopen(($ip ? $ip : $host), $port, $errno, $errstr, $timeout);  

       if(!$fp) return ''; else {  

           $header = $content = '';  

           stream_set_blocking($fp, $block);  

           stream_set_timeout($fp, $timeout);  

           fwrite($fp, $out);  

           $status = stream_get_meta_data($fp);  

           if(!$status['timed_out']) {//未超时  

               while (!feof($fp)) {  

                   $header .= $h = fgets($fp);  

                   if($h && ($h == "\r\n" ||  $h == "\n")) break;  

               }  

  

               $stop = false;  

               while(!feof($fp) && !$stop) {  

                   $data = fread($fp, ($limit == 0 || $limit > 8192 ? 8192 : $limit));  

                   $content .= $data;  

                   if($limit) {  

                       $limit -= strlen($data);  

                       $stop = $limit <= 0;  

                   }  

               }  

           }  

        fclose($fp);  

           return $returnHeader ? array($header,$content) : $content;  

       }  

    }  

?>

调用也很简单的。简单的例子：

复制代码 代码如下:echo httpRequest('http://www.baidu.com');

希望本文所述对大家的php程序设计有所帮助。