2019独角兽企业重金招聘Python工程师标准>>> 
<?php/**
* ajax proxy
* ajax跨域解决办法
* @author suconghou <suconghou@126.com>
* @version v1.1
* @blog http://blog.suconghou.cn
* @update 2014.2.26
* @ 修正了get时忽略了端口号的问题
*/
class ajax
{private $url; ///真实的ajax地址private $get;private $post;private $get_string;private $post_string;private $result;function __construct(){isset($_REQUEST['url'])||exit('no available url');$this-> url=$_REQUEST['url'];foreach ($_GET as $key => $value){if($key=='url')continue;$this-> get[$key]=$value;}foreach ($_POST as $key => $value){if($key=='url')continue; $this-> post[$key]=$value;}if(!empty($this-> get)){$this-> get_string=$this->implode_with_key($this-> get);}if(!empty($this-> post)){$this-> post_string=$this->implode_with_key($this-> post);}//$this-> debug();$this-> ajax();}function debug($debug=1){var_dump($this-> get);var_dump($this-> post);var_dump($this-> get_string);}function ajax(){if (empty($this-> post))///没有post数据,但可能有get{$this->get();}else //可能有post,有get{$this->post();}echo $this-> result;}///三种版本的post,get,优先使用curlfunction post(){if (extension_loaded('curl')){ $url=$this->query_string();$ch=curl_init();curl_setopt_array($ch, array(CURLOPT_URL=>$url,CURLOPT_RETURNTRANSFER=>1,CURLOPT_POST=>1,CURLOPT_POSTFIELDS=>$this-> post_string));$this-> result=curl_exec($ch);curl_close($ch);}else if(function_exists('fsockopen')){$parts = parse_url($this-> url);$fp= fsockopen($parts['host'],isset($parts['port']) ? $parts['port'] : 80,$errno, $errstr,10);if (!$fp) die("$errstr($errno)");$url=$this->query_string(1);$out='POST '.$url."\r\nContent-type: application/x-www-form-urlencoded\r\n"."Content-length: " . strlen($this-> post_string) . "\r\nConnection: close\r\n\r\n".$this-> post_string;//exit($out);fwrite($fp,$out);while ($str = trim(fgets($fp, 4096))){$header .= $str;}while (!feof($fp)){$data.=fgets($fp, 4096);}$this-> result=$data;}else{$context = array('http' => array('method' => 'POST','header' => 'Content-type: application/x-www-form-urlencoded\r\n' . 'Content-length:' . strlen($this-> post_string)+8,'content' =>$this-> post_string));$stream_context = stream_context_create($context);$data = file_get_contents($this->query_string(), false, $stream_context);$this-> result=$data;}}function get(){if (extension_loaded('curl'))//已修正端口号问题{$ch=curl_init(); $url=$this->query_string();curl_setopt_array($ch, array(CURLOPT_URL=>$url,CURLOPT_RETURNTRANSFER=>1));$this-> result=curl_exec($ch);curl_close($ch);}else if(function_exists('fsockopen')){$parts = parse_url($this-> url);$fp= fsockopen($parts['host'],isset($parts['port']) ? $parts['port'] : 80,$errno, $errstr,10);if (!$fp) die("$errstr($errno)"); $url=$this->query_string(1);$out = 'GET ' . $url . "\r\nConnection: Close\r\n\r\n";fwrite($fp, $out);while ($str = trim(fgets($fp, 4096))){$header .= $str;}while (!feof($fp)){$data.=fgets($fp, 4096);}$this-> result=$data;}else{$url=$this->query_string(); $this-> result=file_get_contents($url);}}function implode_with_key($assoc, $inglue = '=', $outglue = '&'){$return = null;foreach ($assoc as $tk => $tv) $return .= $outglue.$tk.$inglue.$tv;return substr($return,1);}function query_string($type=0){$parts = parse_url($this-> url);$host_port=$parts['host'];if($parts['port']){$host_port.=':'.$parts['port'];}if (empty($parts['query'])){$parts['query']=$this-> get_string;}else{ if(!empty($this-> get_string)){$parts['query'].='&'.$this-> get_string;}} if($type){$url=$parts['path'].'?'.$parts['query']." HTTP/1.1\r\nHost: " . $host_port ; }else{$url=$parts['scheme'].'://'.$host_port.$parts['path'].'?'.$parts['query']; }//exit($url);return $url;}}$ajax=new ajax();在发送AJAX时提交参数url给ajax.php文件,url为你想要发送异步请求的ajax页面.例如
var url="./ajax.php?url=http://my.oschain.net?a=1&b=2";$.get(url,{name:'11',pass:'11260',htm:'html'},function(data){$('#text').html(data);});
///此时会发送get数据 name,pass,htm到http://my.oschain.net?a=1&b=2,故发送get时,get数据可以写在url后面,也可以单独,并且url参数也可以单独.
///或者var url="./ajax.php?url=http://127.0.0.2:8088/3.php?a=1&b=3";$.post(url,{name:'11',pass:'11260',htm:'html'},function(data){$('#text').html(data);});
///这样会发送get中的a,b post中的name,pass,htm
///并且无论get还是post,你都可以将url单独传送,不区分get和post,
///如
var url="./ajax.php";$.post(url,{url:'http://my.oschina.net/',name:'11',pass:'11260',htm:'html'},function(data){$('#text').html(data);});什么是跨域问题、
