Yahoo contacts!!! import class in C#

I tried to find free Yahoo! Contact import code for .NET platform. I found only paid packages for 300+$.


I've implemented importing and you can use it for free.
(But you need to make some change in code to compile it)




using System;

using System.Collections.Specialized;

using System.Net;

using System.Text;

using System.Text.RegularExpressions;



namespace Gnilly.Syndication.Mail

{

public class YahooExtract

{

private const string _addressBookUrl = "http://address.yahoo.com/yab/us/Yahoo_ab.csv?loc=us&.rand=1671497644&A=H&Yahoo_ab.csv";

private const string _authUrl = "https://login.yahoo.com/config/login?"; private const string _loginPage = "https://login.yahoo.com/config/login";

private const string _userAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.3) Gecko/20070309 Firefox/2.0.0.3";





public bool Extract( NetworkCredential credential, out MailContactList list )

{

bool result = false;





list = new MailContactList();





try

{

WebClient webClient = new WebClient(); webClient.Headers[ HttpRequestHeader.UserAgent ] = _userAgent; webClient.Encoding = Encoding.UTF8;





byte[] firstResponse = webClient.DownloadData( _loginPage );

string firstRes = Encoding.UTF8.GetString( firstResponse );



NameValueCollection postToLogin = new NameValueCollection();

Regex regex = new Regex( "type=\"hidden\" name=\"(.*?)\" value=\"(.*?)\"", RegexOptions.IgnoreCase );

Match match = regex.Match( firstRes );

while ( match.Success )

{

if ( match.Groups[ 0 ].Value.Length > 0 )

{

postToLogin.Add( match.Groups[ 1 ].Value, match.Groups[ 2 ].Value );

}

match = regex.Match( firstRes, match.Index + match.Length );

}





postToLogin.Add( ".save", "Sign In" );

postToLogin.Add( ".persistent", "y" );





string login = credential.UserName.Split( '@' )[ 0 ];

postToLogin.Add( "login", login );

postToLogin.Add( "passwd", credential.Password );





webClient.Headers[ HttpRequestHeader.UserAgent ] = _userAgent;

webClient.Headers[ HttpRequestHeader.Referer ] = _loginPage;

webClient.Encoding = Encoding.UTF8;

webClient.Headers[ HttpRequestHeader.Cookie ] = webClient.ResponseHeaders[ HttpResponseHeader.SetCookie ];



webClient.UploadValues( _authUrl, postToLogin );

string cookie = webClient.ResponseHeaders[ HttpResponseHeader.SetCookie ];





if ( string.IsNullOrEmpty( cookie ) )

{

return false;

}





string newCookie = string.Empty;

string[] tmp1 = cookie.Split( ',' );

foreach ( string var in tmp1 )

{

string[] tmp2 = var.Split( ';' );

newCookie = String.IsNullOrEmpty( newCookie ) ? tmp2[ 0 ] : newCookie + ";" + tmp2[ 0 ];

}





// set login cookie

webClient.Headers[ HttpRequestHeader.Cookie ] = newCookie;

byte[] thirdResponse = webClient.DownloadData( _addressBookUrl );

string thirdRes = Encoding.UTF8.GetString( thirdResponse );





string crumb = string.Empty;

Regex regexCrumb = new Regex( "type=\"hidden\" name=\"file://.crumb/" id=\"crumb1\" value=\"(.*?)\"", RegexOptions.IgnoreCase );

match = regexCrumb.Match( thirdRes );

if ( match.Success && match.Groups[ 0 ].Value.Length >) )

{

crumb = match.Groups[ 1 ].Value;

}





NameValueCollection postDataAB = new NameValueCollection();

postDataAB.Add( ".crumb", crumb );

postDataAB.Add( "vcp", "import_export" );

postDataAB.Add( "submit[action_export_yahoo]", "Export Now" );





webClient.Headers[ HttpRequestHeader.UserAgent ] = _userAgent;

webClient.Headers[ HttpRequestHeader.Referer ] = _addressBookUrl;



byte[] FourResponse = webClient.UploadValues( _addressBookUrl, postDataAB );

string csvData = Encoding.UTF8.GetString( FourResponse );



string[] lines = csvData.Split( '\n' ); foreach ( string line in lines )

{

string[] items = line.Split( ',' );

if ( items.Length < 5 )

{ continue;

}

string email = items[ 4 ];

string name = items[ 3 ];

if ( !string.IsNullOrEmpty( email ) && !string.IsNullOrEmpty( name ) )

{

email = email.Trim( '\"' );

name = name.Trim( '\"' );

if ( !email.Equals( "Email" ) && !name.Equals( "Nickname" ) )

{

MailContact mailContact = new MailContact();

mailContact.Name = name;

mailContact.Email = email;

list.Add( mailContact );



}

}

}





result = true;

}

catch

{

}

return result;

}

}

}