HTTP協議分析系列（六）------php+socket+cookie請求

以www.verycd.com為例

在Firefox瀏覽器登入wuming88888888帳號為發送方

在chrome瀏覽器登入wuming1990帳號為接收方

分析發送方的表單

分析提交頁原始碼POST的資料 [php] view plain copy <?php    require('./http.class.php');   $http=new Http('http://home.verycd.com/cp.php?ac=pm&op=send&touid=0&pmid=0');   $msg=array(       'formhash'=>'10fe754a',       'message'=>'你好',       'pmsubmit'=>true,       'pmsubmit_btn'=>'發送',       'refer'=>'http://home.verycd.com/space.php?do=pm&filter=privatepm',       'username'=>'wuming1990'   );   file_put_contents('./res.html',$http->post($msg));      ?>  

開啟res.html,分析原始碼 [php] view plain copy HTTP/1.1 301 Moved Permanently   Server: nginx   Date: Fri, 05 Dec 2014 06:57:05 GMT   Content-Type: text/html   Transfer-Encoding: chunked   Connection: close   Set-Cookie: sid=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/; domain=.verycd.com   Set-Cookie: member_id=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/; domain=.verycd.com   Set-Cookie: member_name=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/; domain=.verycd.com   Set-Cookie: pass_hash=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/; domain=.verycd.com   Set-Cookie: rememberme=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/; domain=.verycd.com   Set-Cookie: mgroupId=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/; domain=.verycd.com   Set-Cookie: coppa=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/; domain=.verycd.com   Set-Cookie: uchome_auth=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/; domain=.verycd.com   Set-Cookie: uchome_loginuser=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/; domain=.verycd.com   Location: http://www.verycd.com/account/profile/   Set-Cookie: uchome__refer=cp.php%253Fac%253Dprofile; path=/; domain=.verycd.com      33fc  

調試查看自己發送的是什麼內容。 [php] view plain copy 這時候我們可以分析出錯誤出現在第一行   列印該對象   Http Object   (       [errno:protected] => 0       [errstr:protected] =>        [response:protected] =>        [url:protected] => Array           (               [scheme] => http               [host] => home.verycd.com               [path] => /cp.php               [query] => ac=pm&op=send&touid=0&pmid=0               [port] => 80           )          [version:protected] => HTTP/1.1       [fh:protected] => Resource id #3       [line:protected] => Array           (               [0] => POST /cp.php HTTP/1.1           )          [header:protected] => Array           (               [0] => Host:home.verycd.com               [1] => Content-type:application/x-www-form-urlencoded               [2] => Content-length:185           )          [body:protected] => Array           (               [0] => formhash=10fe754a&message=%E4%BD%A0%E5%A5%BD&pmsubmit=1&pmsubmit_btn=%E5%8F%91%E9%80%81&refer=http%3A%2F%2Fhome.verycd.com%2Fspace.php%3Fdo%3Dpm%26filter%3Dprivatepm&username=wuming1990           )      )  
[php] view plain copy 修改我們的http類      <pre name="code" class="php"> //http請求類的介面   interface Proto{       //串連url       function conn($url);       //發送get查詢       function get();       //發送post查詢       function post();       //關閉串連       function close();   }   class Http implements Proto{       const CRLF="\r\n";       protected $errno=-1;       protected $errstr='';       protected $response='';       protected $url=null;       protected $version='HTTP/1.1';       protected $fh=null;       protected $line=array();       protected $header=array();       protected $body=array();              public function __construct($url){           $this->conn($url);           $this->setHeader('Host:'.$this->url['host']);       }       //此方法負責寫請求行       protected function setLine($method){           $this->line[0]=$method.' '.$this->url['path'].'?'.$this->url['query'].' '.$this->version;       }       //此方法負責寫頭資訊       public function setHeader($headerline){           $this->header[]=$headerline;       }       //此方法負責寫主體資訊       protected function setBody($body){                      $this->body[]=http_build_query($body);;       }       //串連url       function conn($url){           $this->url=parse_url($url);           //判斷連接埠           if(!isset($this->url['port'])){               $this->url['port']=80;           }           $this->fh=fsockopen($this->url['host'],$this->url['port'],$this->errno,$this->errstr,3);       }       //構造get請求的資料       function get(){           $this->setLine('GET');           $this->request();           return $this->response;       }       //構造post請求的資料       function post($body=array()){           //構造主體資訊           $this->setLine('POST');                      //設定content-type           $this->setHeader('Content-type:application/x-www-form-urlencoded');           //設定主體資訊，比GET不一樣的地方           $this->setBody($body);           //計算content-length           $this->setHeader('Content-length:'.strlen($this->body[0]));           $this->request();           return $this->response;       }       //真正請求       function request(){           //把請求行，頭資訊，實體資訊  放在一個數組裡，便於拼接           $req=array_merge($this->line,$this->header,array(''),$this->body,array(''));           $req=implode(self::CRLF,$req);   //      print_r($this);   //      echo $req;   //      exit;           fwrite($this->fh,$req);                      while(!feof($this->fh)){               $this->response.=fread($this->fh,1024);           }                      $this->close();//關閉串連           return $this->response;       }       //關閉串連       function close(){           fclose($this->fh);       }   }  



產生如下POST /cp.php?ac=pm&op=send&touid=0&pmid=0 HTTP/1.1Host:home.verycd.comContent-type:application/x-www-form-urlencodedContent-length:185formhash=10fe754a&message=%E4%BD%A0%E5%A5%BD&pmsubmit=1&pmsubmit_btn=%E5%8F%91%E9%80%81&refer=http%3A%2F%2Fhome.verycd.com%2Fspace.php%3Fdo%3Dpm%26filter%3Dprivatepm&username=wuming1990 [php] view plain copy HTTP/1.1 200 OK   Server: nginx   Date: Fri, 05 Dec 2014 07:11:39 GMT   Content-Type: text/html   Transfer-Encoding: chunked   Connection: close   Set-Cookie: sid=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/; domain=.verycd.com   Set-Cookie: member_id=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/; domain=.verycd.com   Set-Cookie: member_name=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/; domain=.verycd.com   Set-Cookie: pass_hash=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/; domain=.verycd.com   Set-Cookie: rememberme=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/; domain=.verycd.com   Set-Cookie: mgroupId=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/; domain=.verycd.com   Set-Cookie: coppa=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/; domain=.verycd.com   Set-Cookie: uchome_auth=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/; domain=.verycd.com   Set-Cookie: uchome_loginuser=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/; domain=.verycd.com   Set-Cookie: uchome__refer=cp.php%253Fac%253Dpm; path=/; domain=.verycd.com      表示已成功，但是不完全，我們接著看res.html中的內容   在網頁中有如下內容：表明需要先登入以後才能操作  

伺服器怎麼知道咱們沒登陸的。

http一個很重要的特點：無狀態，兩次請求之間沒有關係。

伺服器如何記住一個客戶。

 

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