在Asp.net中以编程方式登录网站

本文介绍了在Asp中以编程方式登录网站的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我想从需要登录的网站的HTML中提取数据。我在网上浏览了4天，但没有明确的结果。

I want to extract data from HTML of a website that needs to be logged in. I am searhing the web for 4 days with no clear results.

我需要Asp/C#的答案。

I need an answer for Asp/C#.

我到目前为止收集的信息：

• 我需要使用HttpWebRequest和HttpWebResponse
• 我必须使用cookie
• 该网站正在使用PHP， JS / AJAX
• postData类似于 email = ???& password = ???& login_now = yes& login_submit =;
• 登录按钮重定向到 http：// www 。 wsName / ajax / login.ajax .php

• I need to use HttpWebRequest and HttpWebResponse
• I have to work with cookies
• Website is using PHP, JS/AJAX
• postData is like "email=???&password=???&login_now=yes&login_submit=";
• Login button redirects to "www.wsName/ajax/login.ajax.php"

登录页面源代码：

<form method="post" action="/" id="login_form" onsubmit="return ajax_submit('#login_form',post_login)"> <table class="login_table" cellspacing="0" cellpadding="0"> <tr> <td><label for="email">Email</label></td> <td><label for="password">Password</label></td> <td></td> </tr> <tr> <td> <div class='sign_up_error' id="sign_up_error" style='margin-top:0;margin-left:-207px;'></div> <div class='light_input' style='width:150px'> <input type="text" name="email" id="email" class="login_field" style='width:142px' tabindex="1" /> </div> </td> <td> <div class='light_input' style='width:150px'> <input type="password" name="password" id="password" class="login_field" style='width:142px' tabindex="2" /> </div> </td> <td> <span class='button' id="login_button" onclick="ajax_submit('#login_form',post_login);" tabindex="3"><span class='button_border'>Log In <img src='/pics/cf_mini_arrow_right.png'></span></span> <input type="submit" class="" style="width:0px; height: 0px; overflow:hidden; border: none;" name="submit_login"/> </td> </tr> <tr> <td><input type="checkbox" name="remember" id="remember" value="1" tabindex="4"/><label for="remember">Remember me</label></td> <td class='right' style='padding-right:5px;'><a class='weight_normal' href="/forgot-password/">Forgot password?</a></td> <input type="hidden" name="login_now" value="yes" /> <td><input type='hidden' name="login_submit" id="login_submit" /></td> </tr> </table> </form>

请求标头类似于（wsName：网站名称）：

• 接受：text / html，application / xhtml + xml，application / xml; q = 0.9，image / webp， / ; q = 0.8
• 接受编码：gzip，压缩
• 接受语言：tr-TR，tr; q = 0.8，en- US; q = 0.6，en; q = 0.4
• 缓存控制：最大年龄= 0
• 连接：保持活动状态
• 内容长度：59
• 内容类型：应用程序/ x-www-form-urlencoded
• 主机： wsName
• 升级不安全请求：1
• 用户代理：Mozilla / 5.0（Windows NT 10.0 ; WOW64）AppleWebKit / 537.36 （KHTML，like Gecko）Chrome / 56.0.2924.87 Safari / 537.36

• Accept:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,/;q=0.8
• Accept-Encoding:gzip, deflate
• Accept-Language:tr-TR,tr;q=0.8,en-US;q=0.6,en;q=0.4
• Cache-Control:max-age=0
• Connection:keep-alive
• Content-Length:59
• Content-Type:application/x-www-form-urlencoded
• Host: wsName
• Upgrade-Insecure-Requests:1
• User-Agent:Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36

请求标题的Cookie

• wsName [css] = medium_text;

• wsName[css]=medium_text;

cc_cookie_accept = cc_cookie_accept;

cc_cookie_accept=cc_cookie_accept;

我的代码（在此处上无效）就像：

My Code (which doesnt work and taken from here) is like:

string loginURL = "www.*wsName*/ajax/login.ajax.php"; string loginURL2 = "www.*wsName*"; string formDataStr = "email=???&password=???&login_now=yes&login_submit="; //First request: Get the cookies CookieCollection cookies = new CookieCollection(); HttpWebRequest request = (HttpWebRequest)WebRequest.Create(loginURL); request.CookieContainer = new CookieContainer(); request.CookieContainer.Add(cookies); //Get the response from the server and save the cookies from the first request.. HttpWebResponse response = (HttpWebResponse)request.GetResponse(); cookies = response.Cookies; //Second request: POST the form data and recover the cookies from the first request.. HttpWebRequest getRequest = (HttpWebRequest)WebRequest.Create(loginURL); getRequest.CookieContainer = new CookieContainer(); getRequest.CookieContainer.Add(cookies); //recover cookies First request getRequest.Method = WebRequestMethods.Http.Post; getRequest.UserAgent = "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36"; getRequest.AllowWriteStreamBuffering = true; getRequest.ProtocolVersion = HttpVersion.Version11; //getRequest.Referer = "www.*wsName*/index.php"; getRequest.AllowAutoRedirect = true; getRequest.ContentType = "application/x-www-form-urlencoded"; byte[] byteArray = Encoding.ASCII.GetBytes(formDataStr); getRequest.ContentLength = byteArray.Length; Stream newStream = getRequest.GetRequestStream(); //open connection newStream.Write(byteArray, 0, byteArray.Length); // Send the data. newStream.Close(); HttpWebResponse getResponse = (HttpWebResponse)getRequest.GetResponse(); using (StreamReader sr = new StreamReader(getResponse.GetResponseStream())) { string sourceCode = sr.ReadToEnd(); }

我使用了两个链接（loginURL，loginURL2），进行了修改并尝试了很多东西，但是最后我有一个很大的零。这是我第一次需要使用HttpWebRequest和HttpWebResponse。所以我想我在这里想念一些东西。

I used both links (loginURL, loginURL2), modified and tried many things but at the end i have a very big zero. This is the first time i needed to work with HttpWebRequest and HttpWebResponse. So i think i miss something here.

请帮助，谢谢。

推荐答案

您可以使用http请求配置文件工具，例如fiddler，用于记录您的Web浏览器请求详细信息，然后再次运行c＃代码，比较两个结果之间的区别。

you can use http request profile tool, like fiddler to record your request details of web browser, and run your c# code again, compare the two results where are the differences.