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/1.0rn";
$out .= "accept: */*rn";
//$out .= "referer: $boardurlrn";
$out .= "accept-language: zh-cnrn";
$out .= "content-type: application/x-www-form-urlencodedrn";
$out .= "user-agent: $_server[http_user_agent]rn";
$out .= "host: $hostrn";
$out .= 'content-length: '.strlen($post)."rn";
$out .= "connection: closern";
$out .= "cache-control: no-cachern";
$out .= "cookie: $cookiernrn";
$out .= $post;
} else {
$out = "get $path http/1.0rn";
$out .= "accept: */*rn";
//$out .= "referer: $boardurlrn";
$out .= "accept-language: zh-cnrn";
$out .= "user-agent: $_server[http_user_agent]rn";
$out .= "host: $hostrn";
$out .= "connection: closern";
$out .= "cookie: $cookiernrn";
}
$fp = fsockopen(($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 == "rn" || $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;
}
}
?>
/**
* 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/1.0rn";
$out .= "accept: */*rn";
//$out .= "referer: $boardurlrn";
$out .= "accept-language: zh-cnrn";
$out .= "content-type: application/x-www-form-urlencodedrn";
$out .= "user-agent: $_server[http_user_agent]rn";
$out .= "host: $hostrn";
$out .= 'content-length: '.strlen($post)."rn";
$out .= "connection: closern";
$out .= "cache-control: no-cachern";
$out .= "cookie: $cookiernrn";
$out .= $post;
} else {
$out = "get $path http/1.0rn";
$out .= "accept: */*rn";
//$out .= "referer: $boardurlrn";
$out .= "accept-language: zh-cnrn";
$out .= "user-agent: $_server[http_user_agent]rn";
$out .= "host: $hostrn";
$out .= "connection: closern";
$out .= "cookie: $cookiernrn";
}
$fp = fsockopen(($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 == "rn" || $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。
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