模擬Http請求

使用Telnet模擬Http請求

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打開cmd運行框，輸入Telnet www.baidu.com 80後按回車鍵。此時看到的界面是黑屏狀態，標題欄顯示 Telnet www.baidu.com
若是提示telnet不是內部或外部命令能夠參考百度經驗。利用快捷鍵打開「Ctrl+]」打開Telnet回顯，按回車鍵後能夠進入編輯狀態。

回顯模式：

編輯模式：

接下來是考驗手速的時候了，單身黨必定完勝的遊戲。輸入GET /index.html HTTP/1.1按回車鍵，接着輸入HOST:www.baidu.com,連續按兩次回車鍵（兩次回車表明提交請求）輸入速度不夠快的話，將會鏈接失敗。能夠將代碼寫入記事本，使用時直接複製就行了。

而後來看看服務器的返回數據：

PHP模擬HTTP請求

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Http.class.php

<?php
    class HttpRequest
    {
        private $_host;                    //主機地址
        private $_port;                    //端口號
        private $_requestHead;            //請求頭信息
        private $_requestMethod;        //請求方式
        private $_requestPath;            //請求路徑
        private $_requestContent = '';    //請求正文
        private $_httpVersion = '1.1';    //協議版本

        /**
         * [__contruction 初始化成員屬性]
         * @author:JieJie
         */
        public function __construct($host,$port,$method,$path) 
        {
            $this->_host = $host;
            $this->_port = $port;
            $this->_requestMethod = strtoupper($method);
            $this->_requestPath = $path;
        }

        /**
         * [setRequestHead 設置請求頭信息]
         * @author:JieJie
         * @DateTime:2016-11-25T00:22:04+0800
         * @param      [array] $data [頭信息數組]
         */
        public function setRequestHead($data) {
            foreach ($data as $key => $value) {
                $this->_requestHead .= $key.':'.$value."\r\n";
            }
            $this->_requestHead .= "\r\n";

            return $this;
        }

        /**
         * [setRequestContent 設置請求正文]
         * @author:JieJie
         * @DateTime:2016-11-25T00:37:53+0800
         * @param  [array] $data 
         */
        public function setRequestContent($data) {
            if($this->_requestMethod != 'POST')  
                return $this;

            foreach ($data as $key => $value) {
                $this->_requestContent .= "{$key}={$value}&";
            }
            $this->_requestContent = rtrim($this->_requestContent,'&')."\r\n";
            return $this;
        }

        /**
         * [sendRequest 發送HTTP請求並獲取結果]
         * @author:JieJie
         * @DateTime:2016-11-25T00:51:53+0800
         */
        public function sendRequest() {
            //拼接請求行
            $http = "{$this->_requestMethod} {$this->_requestPath} HTTP/{$this->_httpVersion}\r\n";
            //拼接請求頭
            $http .= $this->_requestHead;
            //拼接請求正文
            $http .= $this->_requestContent;
            //建立鏈接
            $fp = fsockopen($this->_host,$this->_port,$errno,$errstr);
            if(!$fp) 
                throw new Exception($errstr);

            //發送請求
            fwrite($fp, $http);
            //得到結果
            $result = '';
            while (!feof($fp)) 
                $result .= fgets($fp);

            return $result;
        }
    }
?>

client.php

<?php
    include './Http.class.php';

    $Http = new HttpRequest('www.jiejieyh.cn','80','POST','/login.php');
    $requestHead = [
        'Host'=>'www.jiejieyh.cn',
        'User-Agent'=>'Mozilla/5.0 (Windows NT 10.0; WOW64; rv:49.0) Gecko/20100101 Firefox/49.0',
        'Accept'=>'application/json, text/javascript, */*; q=0.01',
        'Accept-Language'=>'zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3',
        'Accept-Encoding'=>'gzip, deflate',
        'Content-Type'=>'application/x-www-form-urlencoded;',
        'charset'=>'UTF-8',
        'X-Requested-With'=>'XMLHttpRequest',
        'Referer'=>'http://www.jiejieyh.cn',
        'Content-Length'=>47,
        'Connection'=>'keep-alive'
    ];
    $requestContent = [
        'password' => 'admin',
        'username' => '123456',
    ];
    $result = $Http->setRequestHead($requestHead)->setRequestContent($requestContent)->sendRequest();
    echo $result;
?>