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class AsynHandle {
public $url = ''; //传入的完整请求url,包括"http://"或"https://"
public $cookie = array(); //传入的cookie数组,须是键值对
public $post = array(); //传入的post数组,须是键值对
public $timeout = 30; //超时秒数
public $result = ''; //获取到的数据
private $gzip = true; //是否开启gzip压缩
private $fop = NULL; //fsockopen资源句柄
private $host = ''; //主机
private $port = ''; //端口
private $referer = ''; //伪造来路
private $requestUri = ''; //实际请求uri
private $header = ''; //头信息
private $block = 1; //网络流状态.1为阻塞,0为非阻塞
private $limit = 128; //读取的最大字节数
//构造函数
public function __construct(){
ignore_user_abort(TRUE);//忽略用户中断.如果客户端断开连接,不会引起脚本abort
//set_time_limit(0);//取消脚本执行延时上限
}
//解析URL并创建资源句柄
private function analyzeUrl(){
if ($this->url == ''){return false;}
$url_array = parse_url($this->url);
!isset($url_array['host']) && $url_array['host'] = '';
!isset($url_array['path']) && $url_array['path'] = '';
!isset($url_array['query']) && $url_array['query'] = '';
!isset($url_array['port']) && $url_array['port'] = 80;
$this->host = $url_array['host'];
$this->port = $url_array['port'];
$this->referer = $url_array['scheme'].'://'.$this->host.'/';
$this->requestUri = $url_array['path'] ?
$url_array['path'].($url_array['query'] ? '?'.$url_array['query'] : '') : '/';
switch($url_array['scheme']){
case 'https':
$this->fop = fsockopen('ssl://'.$this->host, 443, $errno, $errstr, $this->timeout);
break;
default:
$this->fop = fsockopen($this->host, $this->port, $errno, $errstr, $this->timeout);
break;
}
if(!$this->fop){
$this->result = "$errstr ($errno)
＼n";
return false;
}
return true;
}//analyzeUrl end
//拼装HTTP的header
private function assHeader(){
$method = empty($this->post) ? 'GET' : 'POST';
$gzip = $this->gzip ? 'gzip, ' : '';
//cookie数据
if(!empty($htis->cookie)){
$htis->cookie = http_build_cookie($htis->cookie);
}
//post数据
if(!empty($this->post)){
$this->post = http_build_query($this->post);
}
$header = "$method $this->requestUri HTTP/1.0＼r＼n";
$header .= "Accept: */*＼r＼n";
$header .= "Referer: $this->referer＼r＼n";
$header .= "Accept-Language: zh-cn＼r＼n";
if(!empty($this->post)){
$header .= "Content-Type: application/x-www-form-urlencoded＼r＼n";
}
$header .= "User-Agent: $_SERVER[HTTP_USER_AGENT]＼r＼n";
$header .= "Host: $this->host＼r＼n";
if(!empty($this->post)){
$header .= 'Content-Length: '.strlen($this->post)."＼r＼n";
}
$header .= "Connection: Close＼r＼n";
$header .= "Accept-Encoding: {$gzip}deflate＼r＼n";
$header .= "Cookie: $this->cookie＼r＼n＼r＼n";
$header .= $this->post;
$this->header = $header;
}//assHeader end
//返回状态检测,301、302重定向处理
private function checkRecvHeader($header){
if(strstr($header,' 301 ') || strstr($header,' 302 ')){//重定向处理
preg_match("/Location:(.*?)$/im",$header,$match);
$url = trim($match[1]);
preg_match("/Set-Cookie:(.*?)$/im",$header,$match);
$cookie = (empty($match)) ? '' : $match[1];
$obj = new AsynHandle();
$result = $obj->Get($url, $cookie, $this->post);
$this->result = $result;
return $result;
}elseif(!strstr($header,' 200 ')){
//找不到域名或网址
return false;
}else return 200;
}//checkRecvHeader end
//gzip解压
private function gzdecode($data){
$flags = ord(substr($data, 3, 1));
$headerlen = 10;
$extralen = 0;
$filenamelen = 0;
if ($flags & 4) {
$extralen = unpack('v' ,substr($data, 10, 2));
$extralen = $extralen[1];
$headerlen += 2 + $extralen;
}
if ($flags & 8) $headerlen = strpos($data, chr(0), $headerlen) + 1;
if ($flags & 16) $headerlen = strpos($data, chr(0), $headerlen) + 1;
if ($flags & 2) $headerlen += 2;
$unpacked = @gzinflate(substr($data, $headerlen));
if ($unpacked === FALSE) $unpacked = $data;
return $unpacked;
}//gzdecode end
//请求函数,只请求,不返回
public function Request($url, $cookie=array(), $post=array(), $timeout=3){
$this->url = $url;
$this->cookie = $cookie;
$this->post = $post;
$this->timeout = $timeout;
if(!$this->analyzeUrl()){
return $this->result;
}
$this->assHeader();
stream_set_blocking($this->fop, 0);//非阻塞,无须等待
fwrite($this->fop, $this->header);
fclose($this->fop);
return true;
}//Request end
//获取函数,请求并返回
public function Get($url, $cookie=array(), $post=array(), $timeout=30){
$this->url = $url;
$this->cookie = $cookie;
$this->post = $post;
$this->timeout = $timeout;
if(!$this->analyzeUrl()){
return $this->result;
}
$this->assHeader();
stream_set_blocking($this->fop, $this->block);
stream_set_timeout($this->fop, $this->timeout);
fwrite($this->fop, $this->header);
$status = stream_get_meta_data($this->fop);
if(!$status['timed_out']){
$h='';
while(!feof($this->fop)){
if(($header = @fgets($this->fop)) && ($header == "＼r＼n" || $header == "＼n")){
break;
}
$h .= $header;
}
$checkHttp = $this->checkRecvHeader($h);
if($checkHttp!=200){return $checkHttp;}
$stop = false;
$return = '';
$this->gzip = false;
if(strstr($h,'gzip')) $this->gzip = true;
while(!($stop && $status['timed_out'] && feof($this->fop))){
if($status['timed_out']) return false;
$data = fread($this->fop, ($this->limit == 0 || $this->limit > 128 ? 128 : $this->limit));
if($data == ''){//有些服务器不行,须自行判断FOEF
break;
}
$return .= $data;
if($this->limit){
$this->limit -= strlen($data);
$stop = $this->limit
}
}
@fclose($this->fop);
$this->result = $this->gzip ? $this->gzdecode($return) : $return;
return $this->result;
}else{
return false;
}
}//Get end
}
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