zoukankan      html  css  js  c++  java
  • Node.js 访问https网站

    源码:

    //====================================================
    // 访问https://www.zhihu.com/得到pagecode
    // 2017年11月6日
    //====================================================
    
    
    // 内置https模块,提供了https服务器和客户端功能
    var https=require("https");
    
    // cheerio模块,提供了类似jQuery的功能
    var cheerio = require("cheerio");
    
    // 内置文件处理模块
    var fs=require('fs');
    
    // 请求参数JSON
    var options;
    
    // request请求
    var req;
    
    //--------------------------------------
    // 程序入口
    //--------------------------------------
    function start(){
        // 初始化options  
        options={
            hostname:'www.zhihu.com',
                port:443,
                path:'/',// 子路径
              method:'GET',
               agent:false,
        };
    
        
        req=https.request(options,function(resp){
            resp.setEncoding('utf8');
            var body="";
    
            resp.on('data',function(chunk){
                body+=chunk;              
            });
    
            resp.on('end',function(){
                var $ = cheerio.load(body);
                console.log(body);
    
              
            });
        });
    
        // 超时处理
        req.setTimeout(5000,function(){
            req.abort();
        });
    
        // 出错处理
        req.on('error',function(err){
            if(err.code=="ECONNRESET"){
                console.log('socket端口连接超时。');
            }else{
                console.log('请求发生错误,err.code:'+err.code);
            }
        });
    
        // 请求结束
        req.end();
    }
    
    // 调用start函数,程序开始
    start();

    得到的body数据:

    <!DOCTYPE html>
    <html lang="zh-CN" class="">
    <head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
    <meta http-equiv="X-ZA-Response-Id" content="110f3b166e9849aa">
    <meta http-equiv="X-ZA-Experiment" content="default:None,ge3:ge3_9,ge2:ge2_1,nweb_sticky_sidebar:sticky,live_review_buy_bar:live_review_buy_bar_2,is_office:false,home_ui2:default,is_show_unicom_free_entry:unicom_free_entry_off,app_store_rate_dialog:close,qa_sticky_sidebar:sticky_sidebar,android_profile_panel:panel_b,live_store:ls_a2_b2_c1_f2,search_hybrid_tabs:without-tabs,answer_related_readings:qa_recommend_with_ads_and_article,asdfadsf:asdfad,new_mobile_column_appheader:new_header,fav_act:default,remix_one_key_play_button:headerButton,mobile_qa_page_proxy_heifetz:m_qa_page_nweb,nweb_write_answer:default,android_pass_through_push:getui,new_more:new,new_buy_bar:livenewbuy3,zcm-lighting:zcm,iOS_newest_version:4.2.0,qrcode_login:qrcode,wechat_share_modal:wechat_share_modal_show">
    <meta name="renderer" content="webkit" />
    <meta name="description" content="中文互联网最大的知识平台,帮助人们便捷地分享彼此的知识、经验和见解。"/>
    <meta name="viewport" content="user-scalable=no, width=device-width, initial-scale=1.0, maximum-scale=1.0"/>
    <title>知乎 - 发现更大的世界</title>
    
    
    
    <link rel="apple-touch-icon" href="https://static.zhihu.com/static/revved/img/ios/touch-icon-152.87c020b9.png" sizes="152x152">
    <link rel="apple-touch-icon" href="https://static.zhihu.com/static/revved/img/ios/touch-icon-120.496c913b.png" sizes="120x120">
    <link rel="apple-touch-icon" href="https://static.zhihu.com/static/revved/img/ios/touch-icon-76.dcf79352.png" sizes="76x76">
    <link rel="apple-touch-icon" href="https://static.zhihu.com/static/revved/img/ios/touch-icon-60.9911cffb.png" sizes="60x60">
    
    <link rel="shortcut icon" href="https://static.zhihu.com/static/favicon.ico" type="image/x-icon" />
    <link rel="dns-prefetch" href="p1.zhimg.com"/>
    <link rel="dns-prefetch" href="p2.zhimg.com"/>
    <link rel="dns-prefetch" href="p3.zhimg.com"/>
    <link rel="dns-prefetch" href="p4.zhimg.com"/>
    <link rel="dns-prefetch" href="comet.zhihu.com"/>
    <link rel="dns-prefetch" href="static.zhihu.com"/>
    <link rel="dns-prefetch" href="upload.zhihu.com"/>
    <link rel="stylesheet" href="https://static.zhihu.com/static/revved/-/css/pages/unlogin-index/main.f214513a.css">
    <meta name="google-site-verification" content="FTeR0c8arOPKh8c5DYh_9uu98_zJbaWw53J-Sch9MTg" />
    <meta name="baidu-site-verification" content="KPFppAFoYF4Kkdv9" />
    <meta property="qc:admins" content="00544670776201056375" />
    <link rel="canonical" href="http://www.zhihu.com" />
    <meta id="znonce" name="znonce" content="7b6bfcce1dba4927bc2fde931b3037fd">
    <!--[if lt IE 9]>
    <script src="https://static.zhihu.com/static/components/respond/dest/respond.min.js"></script>
    <link href="https://static.zhihu.com/static/components/respond/cross-domain/respond-proxy.html" id="respond-proxy" rel="respond-proxy" />
    <link href="/static/components/respond/cross-domain/respond.proxy.gif" id="respond-redirect" rel="respond-redirect" />
    <script src="/static/components/respond/cross-domain/respond.proxy.js"></script>
    <![endif]-->
    <script src="https://static.zhihu.com/static/revved/-/js/instant.14757a4a.js"></script>
    </head>
    <body class="zhi ">
    
    
    
    
    <div class="index-main">
    <div class="index-main-body">
    <div class="index-header">
    <h1 class="logo hide-text">知乎</h1>
    
    <h2 class="subtitle">与世界分享你的知识、经验和见解</h2>
    
    </div>
    
    <div class="desk-front sign-flow sign-flow clearfix sign-flow-simple">
    
    
    <div class="index-tab-navs">
    <div class="navs-slider">
    <a href="#signup" class="active">注册</a>
    <a href="#signin">登录</a>
    <span class="navs-slider-bar"></span>
    </div>
    </div>
    
    
    
    <div class="view view-signin" data-za-module="SignInForm">
    <form method="POST">
    <input type="hidden" name="_xsrf" value="c8581655229e04f445154e91134bc9c7"/>
    <div class="group-inputs">
    
    <div class="account input-wrapper">
    
    <input type="text" name="account" aria-label="手机号或邮箱" placeholder="手机号或邮箱" required>
    </div>
    <div class="verification input-wrapper">
    <input type="password" name="password" aria-label="密码" placeholder="密码" required /><button type="button" class="send-code-button">获取验证码</button>
    </div>
    
    <div class="Captcha input-wrapper" data-type="cn" data-za-module="Captcha">
    <div class="Captcha-operate">
    <input type="hidden" name="captcha" required data-rule-required="true" data-msg-required="请点击图中所有倒立的文字">
    <input type="hidden" name="captcha_type" value="cn" required>
    <label class="Captcha-prompt">请点击图中所有倒立的文字</label>
    <span class="Captcha-refresh js-refreshCaptcha sprite-index-icon-refresh"></span>
    </div>
    <div class="Captcha-imageConatiner">
    <img class="Captcha-image" alt="验证码" >
    </div>
    </div>
    
    </div>
    <div class="button-wrapper command">
    <button class="sign-button submit" type="submit">登录</button>
    </div>
    <div class="signin-misc-wrapper clearfix">
    
    <button type="button" class="signin-switch-button">手机验证码登录</button>
    
    <a class="unable-login" href="#">无法登录?</a>
    </div>
    
    <div class="other-signup-wrapper" data-za-module="SNSSignIn">
    
    <span class="name signin-switch-qrcode-buttons">二维码登录</span>
    <span class="signup-footer-separate signup-footer-se"> · </span>
    
    <span class="name signup-social-buttons js-toggle-sns-buttons">社交帐号登录</span>
    
    <div class="sns-buttons">
    <a title="微信登录" class="js-bindwechat" href="#"><i class="sprite-index-icon-wechat"></i></a>
    <a title="微博登录" class="js-bindweibo" href="#"><i class="sprite-index-icon-weibo"></i></a>
    <a title="QQ 登录" class="js-bindqq" href="#"><i class="sprite-index-icon-qq"></i></a>
    </div>
    
    
    </div>
    
    </form>
    
    <div class="qrcode-signin-container">
    <div class="qrcode-signin-step1">
    <div class="qrcode-signin-img-wrapper">
    <img src="/static/img/spinner/grey-loading.gif" class="qrcode-signin-loading"/>
    </div>
    <p>打开最新 <a href="https://www.zhihu.com/app/" target="_blank">知乎 App</a></p>
    <p>在「更多」页面右上角打开扫一扫</p>
    <div class="qrcode-signin-cut-button">
    <span class="signin-switch-password">使用密码登录</span>
    </div>
    </div>
    <div class="qrcode-signin-step2">
    <div class="qrcode-signin-scan-status"></div>
    <p class="qrcode-signin-scan-tips">扫描成功</p>
    <p>请在手机上「确认登录」</p>
    <div class="qrcode-signin-cut-button">
    <span class="qrcode-goto-scan">返回二维码</span>
    </div>
    </div>
    <div class="qrcode-signin-failure">
    <div class="qrcode-signin-failure-icon"></div>
    <p class="qrcode-signin-failure-message"></p>
    <div class="qrcode-signin-cut-button">
    <span class="signin-switch-password">使用密码登录</span>
    </div>
    </div>
    <div class="qrcode-signin-guide"></div>
    </div>
    
    
    
    <div class="QRCode">
    <button class="QRCode-toggleButton">
    <span class="sprite-global-icon-qrcode"></span>
    <span class="QRCode-toggleButtonText ">下载知乎 App</span>
    </button>
    <div class="QRCode-card">
    <div class="QRCode-image"></div>
    <div class="sprite-index-icon-arrow"></div>
    </div>
    </div>
    
    
    </div>
    <div class="view  view-signup selected" data-za-module="SignUpForm">
    
    <form class="zu-side-login-box" action="/register/email" id="sign-form-1" autocomplete="off" method="POST">
    <input type="password" hidden> 
    <input type="hidden" name="_xsrf" value="c8581655229e04f445154e91134bc9c7"/>
    
    <div class="group-inputs">
    
    
    <div class="name input-wrapper">
    <input required type="text" name="fullname" aria-label="姓名" placeholder="姓名">
    </div>
    <div class="email input-wrapper">
    
    <input required type="text" class="account" name="phone_num" aria-label="手机号" placeholder="手机号">
    
    </div>
    <div class="input-wrapper">
    <input required type="password" name="password" aria-label="密码" placeholder="密码(不少于 6 位)" autocomplete="off">
    </div>
    
    
    <div class="Captcha input-wrapper" data-type="cn" data-za-module="Captcha">
    <div class="Captcha-operate">
    <input type="hidden" name="captcha" required data-rule-required="true" data-msg-required="请点击图中所有倒立的文字">
    <input type="hidden" name="captcha_type" value="cn" required>
    <label class="Captcha-prompt">请点击图中所有倒立的文字</label>
    <span class="Captcha-refresh js-refreshCaptcha sprite-index-icon-refresh"></span>
    </div>
    <div class="Captcha-imageConatiner">
    <img class="Captcha-image" alt="验证码" >
    </div>
    </div>
    
    </div>
    <div class="button-wrapper command">
    <button class="sign-button submit" type="submit">注册知乎</button>
    </div>
    
    </form>
    
    <p class="agreement-tip">点击「注册」按钮,即代表你同意<a href="/terms" target="_blank">《知乎协议》</a></p>
    <a class="signup-entry--org" href="/org/signup">注册机构号</a>
    
    <div class="QRCode">
    <button class="QRCode-toggleButton">
    <span class="sprite-global-icon-qrcode"></span>
    <span class="QRCode-toggleButtonText ">下载知乎 App</span>
    </button>
    <div class="QRCode-card">
    <div class="QRCode-image"></div>
    <div class="sprite-index-icon-arrow"></div>
    </div>
    </div>
    
    
    
    </div>
    </div>
    </div>
    
    
    </div>
    
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    <img src="https://static.zhihu.com/static/revved/img/index/chengxing_logo@2x.65dc76e8.png" border='0' />
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    <script type='text/javascript'>(function(){document.getElementById('___szfw_logo___').oncontextmenu = function(){return false;}})();</script>
    </div>
    </div>
    
    
    
    
    <script type="text/json" class="json-inline" data-name="disabled_components">["back_to_top"]</script>
    <script type="text/json" class="json-inline" data-name="current_user">["","","","-1","",0,0]</script>
    <script type="text/json" class="json-inline" data-name="env">["zhihu.com","comet.zhihu.com",false,null,false,false]</script>
    
    <script type="text/json" class="json-inline" data-name="ga_vars">{"user_created":0,"now":1509916984000,"abtest_mask":"------------------------------","user_attr":[0,0,0,"-","-"],"user_hash":0}</script>
    
    <script src="https://static.zhihu.com/static/revved/-/js/vendor.cb14a042.js"></script>
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    <meta name="entry" content="ZH.entrySignPage" data-module-id="page-index">
    
    
    <input type="hidden" name="_xsrf" value="c8581655229e04f445154e91134bc9c7"/>
    </body>
    </html>
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  • 原文地址:https://www.cnblogs.com/heyang78/p/7791399.html
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