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

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：

<?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：

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。