Googlereader user login verification C # specific implementation

The first two articlesArticle

Google Reader API: http://www.cnblogs.com/mybear/archive/2011/02/18/1957704.html

Googlereader user login verification principle: http://www.cnblogs.com/mybear/archive/2011/02/18/1957769.html

I believe you have some knowledge about googlereader API. The following describes how to implement googlereader user login verification C #.

1. Create an 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. Use httppost to pass Login Parameters

 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. Pass the user name and password for login

   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  "  ));
}
} 

So far, Google user login verification is complete! We can create a client RSS subscriber Based on the APIS provided by googlereader!

For example, we want to obtain 20 articles that have been read: You can use httpget to access: http://www.google.com/reader/atom/user/[user id]/State/COM. Google/read

[User id] "-" can be used to represent the current login user. The returned records are in XML format: