登錄百度前需要先獲取必要的Cookies 和一些參數 Token, CodeString
首先，要獲取的是 BAIDUID Cookie，如果沒有這個 Cookie，那么Token和CodeString就不能夠獲取。
獲取 BAIDUID Cookie 很簡單,打開百度首頁,百度服務器就會返回 BAIDUID Cookie。
其次，獲取 Token 和 CodeStrin，Token 是登錄百度時Post 中的一個參數，CodeString 是獲取驗碼時會用到。通過訪問url
https://passport.baidu.com/v2/api/?getapi&tpl=ik&apiver=v3&tt=1371883487&class=login
URL 地址其中幾個參數的意義：
tpl 不知道是做什么用，一是固定的寫 ik 就可以了
apiver 的值是固定的 API的版本號
tt 是時間戳
class 動作類別，登錄時是login，注冊百度帳號時是reg
服務器會返回 Json 結構的數據,其中包含了 Token 和 CodeString:
{
"errInfo": {
"no": "0"
},
"data": {
"rememberedUserName": "",
"codeString": "",
"token": "d45f26cf74aa65c3088f699b8791f9eb",
"cookie": "1"
}
}
"errInfo": {
"no": "0"
},
"data": {
"rememberedUserName": "",
"codeString": "",
"token": "d45f26cf74aa65c3088f699b8791f9eb",
"cookie": "1"
}
}
codeString 一般為空，如果不為空，那么登錄時就需要驗證碼。所以可以根據這個值進行判斷登錄時是需要驗證碼。獲取驗證碼的URL:
https://passport.baidu.com/cgi-bin/genimage? //?后跟CodeString的值
解析 Json 有很多方法，如果使用 C# 可以使用 Newtonsoft.Json 庫，很方便實用的一個Json庫。具體用法就不詳細講了，Newtonsoft.Json下載地址：
http://json.codeplex.com/
有了 Token 和 CodeString 就可以登錄百度了。登錄URL: https://passport.baidu.com/v2/api/?login
登錄百度需要Post 一些參數，下面講一下:
staticpage 登錄后一個跳轉地址
charset 大概是要求服務器返回數據的編碼，沒有仔細深究
token 就不用說了
tpl,
apiver 上面說過了
tt 是時間戳
codestring 就是上面的獲取的CodeString，如果沒要求驗證碼，就為空。
isPhone 如果用手機號碼登錄則ture 否則為 false
safeflg，
u 這兩個沒弄明白什么意思
username 就是百度帳號啦
password 是密碼，明文，沒有加密
verifycode 是驗證碼，如果沒要求驗證碼，就為空。
mem_pass 應該是記住密碼，一般固定為 on
ppui_logintime，
callback 就固定為上面圖片上的值就可以了
只要Post 上面的數據到 URL https://passport.baidu.com/v2/api/?login 就可以實現登錄。
下面再看看登錄后服務器返回的數據:
返回的數據中我們只要看 err_no 就可以了，err_no 是錯誤號，如果err_no＝0 就說明登錄成功，如果不是0那就登錄失敗。
下面是源碼:
using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Text;
using System.Web;
using Newtonsoft.Json;
namespace LoginBAIDU
{
class Program
{
CookieCollection cookies = new CookieCollection();
CookieContainer cc = new CookieContainer();
string username = " asdkf1956@163.com ";
string password = " test1956 ";
string Token = "";
string CodeString = "";
private string Accept = " */* ";
private string UserAgent = " Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.94 Safari/537.36 ";
private string Referer = "";
private string ContentType = " application/x-www-form-urlencoded ";
private void Run()
{
string html = "";
// 訪問百度首頁，獲取 BAIDUID Cookie
GetPageByGet( " http://www.baidu.com ", Encoding.UTF8);
// 獲取 Token, CodeString
GetTokenAndCodeString();
// 登錄百度
Login(username, password);
PrintCookies();
}
/// <summary>
/// 獲取 Token & CodeString
/// </summary>
private void GetTokenAndCodeString()
{
Console.WriteLine( " ---------------------------------Get Token-------------------------------------- ");
string url = string.Format( " https://passport.baidu.com/v2/api/?getapi&tpl=ik&apiver=v3&tt={0}&class=login ", Utility.GetCurrentTimeStamp());
string html = GetPageByGet(url, Encoding.UTF8);
Console.WriteLine(url);
ResultData result = JsonConvert.DeserializeObject<ResultData>(html);
if (result.ErrInfo.no == " 0 ") {
Token = result.Data.Token;
CodeString = result.Data.CodeString;
}
Console.WriteLine( " Token:{0} ", Token);
Console.WriteLine( " CodeString:{0} ", CodeString);
Console.WriteLine( " -------------------------------------------------------------------------------- ");
}
private void Login( string username, string password)
{
string loginUrl = " https://passport.baidu.com/v2/api/?login ";
Dictionary< string, string> postData = new Dictionary< string, string>();
postData.Add( " staticpage ", " http://zhidao.baidu.com/static/html/v3Jump_bf2a8d6e.html ");
postData.Add( " charset ", " GBK ");
postData.Add( " token ", Token);
postData.Add( " tpl ", " ik ");
postData.Add( " apiver ", " v3 ");
postData.Add( " tt ", Utility.GetCurrentTimeStamp().ToString());
postData.Add( " codestring ", "");
postData.Add( " isPhone ", " false ");
postData.Add( " safeflg ", " 0 ");
postData.Add( " u ", " http://www.baidu.com/ ");
postData.Add( " username ", username);
postData.Add( " password ", password);
postData.Add( " verifycode ", "");
postData.Add( " mem_pass ", " on ");
postData.Add( " ppui_logintime ", " 22429 ");
postData.Add( " callback ", " parent.bd__pcbs__7doo5q ");
string html = GetPageByPost(loginUrl, postData, Encoding.UTF8);
Console.WriteLine(html);
}
/// <summary>
/// 打印 Cookies
/// </summary>
private void PrintCookies()
{
Console.WriteLine( " ---------------------------------Cookies---------------------------------------- ");
foreach (Cookie cookie in cookies) {
Console.WriteLine( " {0}: {1} Domain: {2} ", cookie.Name, cookie.Value, cookie.Domain);
}
Console.WriteLine( " -------------------------------------------------------------------------------- ");
}
private void GetMyAsk()
{
string getAskUrl = " http://zhidao.baidu.com/uhome/ask ";
string html = GetPageByGet(getAskUrl, Encoding.GetEncoding( " GBK "));
Console.WriteLine(html);
}
/// <summary>
/// 以 Post 方式提交網頁數據,獲得服務器返回的數據
/// </summary>
/// <param name="url"> Url </param>
/// <param name="postData"> Post 數據 </param>
/// <param name="encoder"> 網頁編碼 </param>
/// <returns> 服務器返回的數據 </returns>
private string GetPageByPost( string url, Dictionary< string, string> postData, Encoding encoder)
{
string html = "";
HttpWebRequest webReq = (HttpWebRequest)WebRequest.Create(url);
webReq.CookieContainer = cc;
webReq.Method = " POST ";
webReq.Accept = this.Accept;
webReq.UserAgent = this.UserAgent;
webReq.Referer = this.Referer;
Stream reqStream = null;
if (postData != null && postData.Count > 0) {
StringBuilder sb = new StringBuilder();
foreach (KeyValuePair< string, string> kv in postData) {
sb.Append(HttpUtility.UrlEncode(kv.Key));
sb.Append( " = ");
sb.Append(HttpUtility.UrlEncode(kv.Value));
sb.Append( " & ");
}
byte[] data = Encoding.UTF8.GetBytes(sb.ToString().TrimEnd( ' & '));
webReq.ContentType = ContentType;
webReq.ContentLength = data.Length;
reqStream = webReq.GetRequestStream();
reqStream.Write(data, 0, data.Length);
if (reqStream != null) {
reqStream.Close();
}
}
HttpWebResponse webResp = (HttpWebResponse)webReq.GetResponse();
cookies.Add(webResp.Cookies);
Stream stream = webResp.GetResponseStream();
StreamReader sr = new StreamReader(stream, encoder);
html = sr.ReadToEnd();
sr.Close();
stream.Close();
return html;
}
private string GetPageByGet( string url, Encoding encoder)
{
string html = "";
HttpWebRequest webReq = (HttpWebRequest)WebRequest.Create(url);
webReq.CookieContainer = cc;
webReq.Method = " GET ";
HttpWebResponse webResp = (HttpWebResponse)webReq.GetResponse();
cookies.Add(webResp.Cookies);
Stream stream = webResp.GetResponseStream();
StreamReader sr = new StreamReader(stream, encoder);
html = sr.ReadToEnd();
sr.Close();
stream.Close();
return html;
}
static void Main( string[] args)
{
new Program().Run();
Console.ReadKey();
}
}
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Text;
using System.Web;
using Newtonsoft.Json;
namespace LoginBAIDU
{
class Program
{
CookieCollection cookies = new CookieCollection();
CookieContainer cc = new CookieContainer();
string username = " asdkf1956@163.com ";
string password = " test1956 ";
string Token = "";
string CodeString = "";
private string Accept = " */* ";
private string UserAgent = " Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.94 Safari/537.36 ";
private string Referer = "";
private string ContentType = " application/x-www-form-urlencoded ";
private void Run()
{
string html = "";
// 訪問百度首頁，獲取 BAIDUID Cookie
GetPageByGet( " http://www.baidu.com ", Encoding.UTF8);
// 獲取 Token, CodeString
GetTokenAndCodeString();
// 登錄百度
Login(username, password);
PrintCookies();
}
/// <summary>
/// 獲取 Token & CodeString
/// </summary>
private void GetTokenAndCodeString()
{
Console.WriteLine( " ---------------------------------Get Token-------------------------------------- ");
string url = string.Format( " https://passport.baidu.com/v2/api/?getapi&tpl=ik&apiver=v3&tt={0}&class=login ", Utility.GetCurrentTimeStamp());
string html = GetPageByGet(url, Encoding.UTF8);
Console.WriteLine(url);
ResultData result = JsonConvert.DeserializeObject<ResultData>(html);
if (result.ErrInfo.no == " 0 ") {
Token = result.Data.Token;
CodeString = result.Data.CodeString;
}
Console.WriteLine( " Token:{0} ", Token);
Console.WriteLine( " CodeString:{0} ", CodeString);
Console.WriteLine( " -------------------------------------------------------------------------------- ");
}
private void Login( string username, string password)
{
string loginUrl = " https://passport.baidu.com/v2/api/?login ";
Dictionary< string, string> postData = new Dictionary< string, string>();
postData.Add( " staticpage ", " http://zhidao.baidu.com/static/html/v3Jump_bf2a8d6e.html ");
postData.Add( " charset ", " GBK ");
postData.Add( " token ", Token);
postData.Add( " tpl ", " ik ");
postData.Add( " apiver ", " v3 ");
postData.Add( " tt ", Utility.GetCurrentTimeStamp().ToString());
postData.Add( " codestring ", "");
postData.Add( " isPhone ", " false ");
postData.Add( " safeflg ", " 0 ");
postData.Add( " u ", " http://www.baidu.com/ ");
postData.Add( " username ", username);
postData.Add( " password ", password);
postData.Add( " verifycode ", "");
postData.Add( " mem_pass ", " on ");
postData.Add( " ppui_logintime ", " 22429 ");
postData.Add( " callback ", " parent.bd__pcbs__7doo5q ");
string html = GetPageByPost(loginUrl, postData, Encoding.UTF8);
Console.WriteLine(html);
}
/// <summary>
/// 打印 Cookies
/// </summary>
private void PrintCookies()
{
Console.WriteLine( " ---------------------------------Cookies---------------------------------------- ");
foreach (Cookie cookie in cookies) {
Console.WriteLine( " {0}: {1} Domain: {2} ", cookie.Name, cookie.Value, cookie.Domain);
}
Console.WriteLine( " -------------------------------------------------------------------------------- ");
}
private void GetMyAsk()
{
string getAskUrl = " http://zhidao.baidu.com/uhome/ask ";
string html = GetPageByGet(getAskUrl, Encoding.GetEncoding( " GBK "));
Console.WriteLine(html);
}
/// <summary>
/// 以 Post 方式提交網頁數據,獲得服務器返回的數據
/// </summary>
/// <param name="url"> Url </param>
/// <param name="postData"> Post 數據 </param>
/// <param name="encoder"> 網頁編碼 </param>
/// <returns> 服務器返回的數據 </returns>
private string GetPageByPost( string url, Dictionary< string, string> postData, Encoding encoder)
{
string html = "";
HttpWebRequest webReq = (HttpWebRequest)WebRequest.Create(url);
webReq.CookieContainer = cc;
webReq.Method = " POST ";
webReq.Accept = this.Accept;
webReq.UserAgent = this.UserAgent;
webReq.Referer = this.Referer;
Stream reqStream = null;
if (postData != null && postData.Count > 0) {
StringBuilder sb = new StringBuilder();
foreach (KeyValuePair< string, string> kv in postData) {
sb.Append(HttpUtility.UrlEncode(kv.Key));
sb.Append( " = ");
sb.Append(HttpUtility.UrlEncode(kv.Value));
sb.Append( " & ");
}
byte[] data = Encoding.UTF8.GetBytes(sb.ToString().TrimEnd( ' & '));
webReq.ContentType = ContentType;
webReq.ContentLength = data.Length;
reqStream = webReq.GetRequestStream();
reqStream.Write(data, 0, data.Length);
if (reqStream != null) {
reqStream.Close();
}
}
HttpWebResponse webResp = (HttpWebResponse)webReq.GetResponse();
cookies.Add(webResp.Cookies);
Stream stream = webResp.GetResponseStream();
StreamReader sr = new StreamReader(stream, encoder);
html = sr.ReadToEnd();
sr.Close();
stream.Close();
return html;
}
private string GetPageByGet( string url, Encoding encoder)
{
string html = "";
HttpWebRequest webReq = (HttpWebRequest)WebRequest.Create(url);
webReq.CookieContainer = cc;
webReq.Method = " GET ";
HttpWebResponse webResp = (HttpWebResponse)webReq.GetResponse();
cookies.Add(webResp.Cookies);
Stream stream = webResp.GetResponseStream();
StreamReader sr = new StreamReader(stream, encoder);
html = sr.ReadToEnd();
sr.Close();
stream.Close();
return html;
}
static void Main( string[] args)
{
new Program().Run();
Console.ReadKey();
}
}
}
運行結果:
