GoogleReader用户登陆验证C#具体实现

继前两篇文章

google reader api：http://www.cnblogs.com/mybear/archive/2011/02/18/1957704.html

GoogleReader用户登陆验证原理：http://www.cnblogs.com/mybear/archive/2011/02/18/1957769.html

相信大家对GoogleReader api已经有所认识，下面就讲下GoogleReader用户登陆验证C#具体实现

1.创建HttpWebRequest

  
  

   
   private
   
    HttpWebRequest CreateRequest(
   
   string
   
    url)
 {
 HttpWebRequest webRequest 
   
   =
   
    WebRequest.Create(url) 
   
   as
   
    HttpWebRequest;
 IWebProxy defaultParoxy 
   
   =
   
    HttpWebRequest.GetSystemWebProxy();
 webRequest.Proxy 
   
   =
   
    defaultParoxy;
 webRequest.UserAgent 
   
   =
   
    
   
   "
   
   GoogleReader for Windows/
   
   "
   
   +
   
   Assembly.GetExecutingAssembly().GetName().Version;
 webRequest.CookieContainer 
   
   =
   
    _CookieContainer;
 webRequest.ServicePoint.Expect100Continue 
   
   =
   
    
   
   false
   
   ;
 webRequest.Timeout 
   
   =
   
    
   
   20000
   
   ;

 
   
   if
   
    (_isLoginIn)
 webRequest.Headers.Add(
   
   "
   
   Authorization
   
   "
   
   , 
   
   "
   
   GoogleLogin auth=
   
   "
   
    
   
   +
   
    _LoginAuth[
   
   2
   
   ].Split(
   
   '
   
   =
   
   '
   
   )[
   
   1
   
   ]);
 
   
   return
   
    webRequest;
 }
  
  

2.使用HttpPost传递登陆参数

  
  

   
   private
   
    
   
   string
   
    PostGoogleLogin(HttpWebRequest webRequest,
   
   string
   
    queryString)
 {
 
   
   string
   
    ResponseString 
   
   =
   
    
   
   string
   
   .Empty;
 webRequest.ContentType 
   
   =
   
    
   
   "
   
   application/x-www-form-urlencoded
   
   "
   
   ;
 webRequest.Method 
   
   =
   
    
   
   "
   
   POST
   
   "
   
   ;

 
   
   byte
   
   [] QueryData 
   
   =
   
    Encoding.UTF8.GetBytes(queryString);
 webRequest.ContentLength 
   
   =
   
    QueryData.Length;
 
   
   try
   
   
 {
 
   
   using
   
    (Stream stream 
   
   =
   
    webRequest.GetRequestStream())
 {
 stream.Write(QueryData, 
   
   0
   
   , QueryData.Length);
 stream.Close();
 ResponseString 
   
   =
   
    GetResponseString(webRequest);
 }
 }
 
   
   catch
   
    (Exception ex)
 {
 LoginError 
   
   +=
   
    ex.ToString() 
   
   +
   
    
   
   "
   
   \r\n
   
   "
   
   ;
 }
 
   
   return
   
    ResponseString;
 }
  
  

3.传递用户名和密码实现登陆

  
  

   
    
   
   public
   
    
   
   void
   
    GoogleLogin(
   
   string
   
    email,
   
   string
   
    password)
 {
 
   
   string
   
    SID_ID 
   
   =
   
    
   
   string
   
   .Empty;
 
   
   string
   
    responseData 
   
   =
   
    
   
   string
   
   .Empty;
 List
   
   <
   
   Parameter
   
   >
   
    queryParams 
   
   =
   
    
   
   new
   
    List
   
   <
   
   Parameter
   
   >
   
   ();
 queryParams.Add(
   
   new
   
    Parameter(
   
   "
   
   service
   
   "
   
   , 
   
   "
   
   reader
   
   "
   
   ));
 queryParams.Add(
   
   new
   
    Parameter(
   
   "
   
   Email
   
   "
   
   , Uri.EscapeDataString(email)));
 queryParams.Add(
   
   new
   
    Parameter(
   
   "
   
   Passwd
   
   "
   
   , Uri.EscapeDataString(password)));
 queryParams.Add(
   
   new
   
    Parameter(
   
   "
   
   source
   
   "
   
   , 
   
   "
   
   Mobile Newspaper/0.1
   
   "
   
   ));
 queryParams.Add(
   
   new
   
    Parameter(
   
   "
   
   continue
   
   "
   
   , 
   
   "
   
   http://www.google.com
   
   "
   
   ));
 
 HttpWebRequest webRequest
   
   =
   
   CreateRequest(
   
   "
   
   https://www.google.com/accounts/ClientLogin
   
   "
   
   );

 responseData 
   
   =
   
    PostGoogleLogin(webRequest, HttpUtil.GetQueryParamters(queryParams));
 
   
   string
   
    pattern
   
   =
   
   "
   
   SID=(.*)
   
   "
   
   ;
 Regex reg 
   
   =
   
    
   
   new
   
    Regex(pattern, RegexOptions.IgnoreCase);
 
   
   if
   
    (reg.IsMatch(responseData))
 {
 _isLoginIn 
   
   =
   
    
   
   true
   
   ;
 _LoginAuth 
   
   =
   
    responseData.Split(
   
   '
   
   \n
   
   '
   
   );
 SID_ID 
   
   =
   
    reg.Match(responseData).Groups[
   
   1
   
   ].Value;
 _CookieContainer.Add(
   
   new
   
    Cookie(
   
   "
   
   SID
   
   "
   
   ,SID_ID,
   
   "
   
   /
   
   "
   
   ,
   
   "
   
   .google.com
   
   "
   
   ));
 }
 }
  
  

至此，google用户登陆验证完成了!我们可以根据googlereader提供的API打造一个属于自己的客户端RSS订阅器！

比如，我们要获得已阅读的20篇文章：可以用httpget的方法访问：http://www.google.com/reader/atom/user/[user ID]/state/com.google/read

[user ID]可以使用“-”来代表当前登陆的用户,返回的记录是XML数据格式：