之所以写这个，是因为本来想写一个Youtube刷评论的工具，把登录做出来了，后面就没继续做下去。
涉及到基本的HttpWatch的应用以及Fiddler的应用(Fd主要用来排查问题，通过对比 浏览器和vs代码 找出问题所在！以浏览器为标准)。
通过HttpWatch抓包分析，我把登录Youtube一共分为三个阶段：
1. 请求 打开录入邮箱地址 页面
2. 请求 回发本邮箱地址，加载邮箱账号 头像
3. 请求 回发本邮箱地址和密码， 登录Youtube
有很多的Cookie和PostData的话是 服务器不做校验的，也就是说重要的 Cookie和Post/Get数据并不是全部你所看到的，这个你可以后期 模拟登陆成功之后，逐个删掉测试看是否还能登陆成功 来判断 该参数是否必须！
上面的原理其实在做其他 网站的模拟 登录 中也是一样的。
大家直接看代码吧。
private void button1_Click(object sender, EventArgs e)
{
var cookieJar = new CookieContainer();
CookieAwareWebClient webClient = new CookieAwareWebClient(cookieJar);
string GAPS = string.Empty;
string GALX = string.Empty;
string GoogleAccountsLocale_session = string.Empty;
string NID = string.Empty;
string ProfileInformation = string.Empty;
//1.第一部分init
string url1 = "https://accounts.google.com/ServiceLogin?sacu=1&continue=https%3A%2F%2F"
+"www.youtube.com%2Fsignin%3Faction_handle_signin%3Dtrue%26app%3Ddesktop%26feature%3Dsign_in_button%26next%3D%252Fwatch%253Fv%253DpMUv7qmKQik%26hl%3Dzh-CN&hl=zh-CN&service=youtube";//地址
string srcString1 = webClient.DownloadString(url1);//解码
//receive cookie
GAPS = GetCookie("GAPS", cookieJar);
GALX = GetCookie("GALX", cookieJar);
GoogleAccountsLocale_session = GetCookie("GoogleAccountsLocale_session", cookieJar);
//2.第二部分input email
webClient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");//采取POST方式必须加的header，如果改为GET方式的话就去掉这句话即可
string postString2 = "_utf8=☃" + "&bgresponse="
+ "&checkConnection=youtube:724:0" + "&checkedDomains=youtube" + "&continue=https://www.youtube.com/signin?action_handle_signin=true&app=desktop&feature=sign_in_button&next=%2Fwatch%3Fv%3DpMUv7qmKQik&hl=zh-CN"
+ "&dnConn=" + "&Email=【此处填写自己的Gmail邮箱】" + "&GALX=" + GALX + "&gxf=AFoagUVXYmSP1FoIo4SFJlAauKdrDab_0A:1465396649942"
+ "&hl=zh-CN" + "&Page=PasswordSeparationSignIn" + "&ProfileInformation=" + "&pstMsg=1" + "&sacu=1"
+ "&service=youtube" + "&signIn=下一步";
byte[] postData2 = Encoding.UTF8.GetBytes(postString2);//编码，尤其是汉字，事先要看下抓取网页的编码方式
string url2 = "https://accounts.google.com/AccountLoginInfo";//地址
webClient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");//采取POST方式必须加的header，如果改为GET方式的话就去掉这句话即可
byte[] responseData2 = webClient.UploadData(url2, "POST", postData2);//得到返回字符流
string srcString2 = Encoding.UTF8.GetString(responseData2);//解码
GAPS = GetCookie("GAPS", cookieJar);
//本文地址：http://www.cnblogs.com/x-poior/p/5585506.html 转载请注明，谢谢！
//3.第三部分input pw
// webClient.Headers.Add("Referer", "https://accounts.google.com/AccountLoginInfo");
// ProfileInformation = QuMiddle(srcString2, @"name=""ProfileInformation"" type=""hidden"" value=""", @""">"); 后面排除法得出结论，该参数不是必需的,
string postString3 = "_utf8=☃" + "&bgresponse="
+ "&checkConnection=youtube:724:0" + "&checkConnection=youtube:398:0"
+ "&checkedDomains=youtube" + "&checkedDomains=youtube"
+ "&continue=https://www.youtube.com/signin?action_handle_signin=true&app=desktop&feature=sign_in_button&next=%2Fwatch%3Fv%3DpMUv7qmKQik&hl=zh-CN"
+ "&dnConn=" + "&Email=【此处填写自己的Gmail邮箱】" + "&GALX=" + GALX + "&gxf=AFoagUVXYmSP1FoIo4SFJlAauKdrDab_0A:1465396649942"
+ "&hl=zh-CN" + "&Page=PasswordSeparationSignIn" + "&Passwd=【此处填写自己的Gmail密码】"
+ "&PersistentCookie=yes" + "&ProfileInformation=" + "&pstMsg=1" + "&pstMsg=1"
+ "&rmShown=1" + "&sacu=1"
+ "&service=youtube" + "&signIn=登录";
byte[] postData3 = Encoding.UTF8.GetBytes(postString3);//编码，尤其是汉字，事先要看下抓取网页的编码方式
string url3 = "https://accounts.google.com/ServiceLoginAuth";//地址
webClient.Method = "POST";
string srcString3 = webClient.UploadString(url3, postString3);
//第四部分，校验Cookie数目判断是否成功！
var lastCookie = cookieJar;//注意，如果第三部分，返回的Response的Cookie的数量有>20 个的话，说明登陆成功了！Google 返回给你很多凭证，可以登录Google大部分的产品、
var s2s4 = srcString3;
var agereg = webClient.DownloadString("https://www.youtube.com/watch?v=VYwkmp97-B4");//左边是受年龄限制的视频，不登陆验证是没法观看下载的！！返回Html-String里含有“ytplayer.config”说明可以观看下载！
}
其他的几个帮助方法，帮助类。
/// <summary>
/// 获取Cookie的值
/// </summary>
/// <param name="cookieName">Cookie名称</param>
/// <param name="cc">Cookie集合对象</param>
/// <returns>返回Cookie名称对应值</returns>
public static string GetCookie(string cookieName, CookieContainer cc)
{
List<Cookie> lstCookies = new List<Cookie>();
Hashtable table = (Hashtable)cc.GetType().InvokeMember("m_domainTable",
System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.GetField |
System.Reflection.BindingFlags.Instance, null, cc, new object[] { });
foreach (object pathList in table.Values)
{
SortedList lstCookieCol = (SortedList)pathList.GetType().InvokeMember("m_list",
System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.GetField
| System.Reflection.BindingFlags.Instance, null, pathList, new object[] { });
foreach (CookieCollection colCookies in lstCookieCol.Values)
foreach (Cookie c1 in colCookies) lstCookies.Add(c1);
}
var model = lstCookies.Find(p => p.Name == cookieName);
if (model != null)
{
return model.Value;
}
return string.Empty;
}
//本文地址：http://www.cnblogs.com/x-poior/p/5585506.html 转载请注明，谢谢！
|| leftlocation > rightlocation)//判断右边字符串是否存在于总字符串中，左边字符串位置是否在右边字符串前 { return ""; } strmidlength = rightlocation - leftlocation;//计算中间字符串长度 strmid = str.Substring(leftlocation, strmidlength);//取出中间字符串 return strmid;//返回中间字符串 }
CookieAwareWebClient .cs
public class CookieAwareWebClient : WebClient
{
public string Method;
public CookieContainer CookieContainer { get; set; }
public Uri Uri { get; set; }
public CookieAwareWebClient()
: this(new CookieContainer())
{
}
public CookieAwareWebClient(CookieContainer cookies)
{
this.CookieContainer = cookies;
this.Encoding = Encoding.UTF8;
}
protected override WebRequest GetWebRequest(Uri address)
{
WebRequest request = base.GetWebRequest(address);
if (request is HttpWebRequest)
{
(request as HttpWebRequest).CookieContainer = this.CookieContainer;
(request as HttpWebRequest).ServicePoint.Expect100Continue = false;
(request as HttpWebRequest).UserAgent = "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.5 Safari/537.36";
(request as HttpWebRequest).Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8";
(request as HttpWebRequest).Headers.Add(HttpRequestHeader.AcceptLanguage, "zh-CN,zh;q=0.8,en;q=0.6,nl;q=0.4,zh-TW;q=0.2");
(request as HttpWebRequest).Referer = "";
(request as HttpWebRequest).KeepAlive = true;
(request as HttpWebRequest).AutomaticDecompression = DecompressionMethods.Deflate | DecompressionMethods.GZip;
if (Method == "POST")
{
(request as HttpWebRequest).ContentType = "application/x-www-form-urlencoded";
}
}
HttpWebRequest httpRequest = (HttpWebRequest)request;
httpRequest.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;
return httpRequest;
}
protected override WebResponse GetWebResponse(WebRequest request)
{
WebResponse response = base.GetWebResponse(request);
String setCookieHeader = response.Headers[HttpResponseHeader.SetCookie];
if (setCookieHeader != null)
{
//do something if needed to parse out the cookie.
try
{
if (setCookieHeader != null)
{
Cookie cookie = new Cookie();
cookie.Domain = request.RequestUri.Host;
this.CookieContainer.Add(cookie);
}
}
catch (Exception)
{
}
}
return response;
}
}
本文地址：http://www.cnblogs.com/x-poior/p/5585506.html 转载请注明，谢谢！