Home >Backend Development >PHP Tutorial >chunked编码有关问题
chunked编码问题
PHP采集到的数据是chunked传输编码,gzip压缩格式的
chunk编码的思路貌似是:将数据分块传输,每一块分为头部和主体字段,头部包含主体信息的长度且以16进制表示,头部和主体以回车换行符分隔,最后一块以单行的0表示分块结束。。
响应头信息:
<br /><br />Array<br />(<br /> [0] => HTTP/1.1 200 OK<br /><br /> [1] => Server: Dict/34002<br /><br /> [2] => Date: Wed, 17 Dec 2014 06:49:22 GMT<br /><br /> [3] => Content-Type: text/html; charset=utf-8<br /><br /> [4] => Transfer-Encoding: chunked<br /><br /> [5] => Connection: keep-alive<br /><br /> [6] => Keep-Alive: timeout=60<br /><br /> [7] => Cache-Control: private<br /><br /> [8] => Last-Modified: Wed, 17 Dec 2014 04:57:49 GMT<br /><br /> [9] => Expires: Wed, 17 Dec 2014 06:49:22 GMT<br /><br /> [10] => Set-Cookie: uvid=VJEncoTSVYJC; expires=Thu, 31-Dec-37 23:55:55 GMT; domain=.dict.cn; path=/<br /><br /> [11] => Content-Encoding: gzip<br /><br />)<br /><br />
<br /><br />if($this->response_num==200)<br /> {<br /> if($this->is_chunked)<br /> {<br /> //读取chunk头部信息,获取chunk主体信息的长度<br /> $chunk_size = (int)hexdec(fgets($this->conn));<br /> //<br /> while(!feof($this->conn) && $chunk_size > 0) <br /> { <br /> //读取chunk头部指定长度的信息<br /> $this->response_body .= fread( $this->conn, $chunk_size ); <br /> fseek($this->conn, 2, SEEK_CUR);<br /> $chunk_size = (int)hexdec(fgets( $this->conn,4096)); <br /> } <br /> }<br /> else<br /> {<br /> $len=0;<br /> //读取请求返回的主体信息<br /> while($items = fread($this->conn, $this->response_body_length))<br /> {<br /> $len = $len+strlen($items);<br /> $this->response_body = $items;<br /> <br /> //当读取完请求的主体信息后跳出循环,不这样做,貌似会被阻塞!!!<br /> if($len >= $this->response_body_length)<br /> {<br /> break;<br /> }<br /> }<br /> }<br /> <br /> if($this->is_gzip)<br /> {<br /> $this->response_body = gzinflate(substr($this->response_body,10));<br /> }<br /> <br /> $this->getTrans($this->response_body);<br /><br /> }<br />