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RSS Feed Aggregator and Blogging Smart Client

, 16 Aug 2005 CPOL
RSS Feed aggregator and blogging Smart Client which uses Enterprise Library, Updater Application Block, lots of XML hacks and desktop tricks. A comprehensive guide to real life hurdles of Smart Client development.
rssfeeder_src.zip
RSSFeeder
RSSBlogAPI
RSSBlogAPI.csproj.user
Web References
CommunityServer
blogservice.disco
blogservice.wsdl
Reference.map
DotText
Reference.map
simpleblogservice.disco
simpleblogservice.wsdl
RSSCommon
Helper
PropertyEditor
RSSCommon.csproj.user
RSSFeeder
Controls
docs
dropshadow.png
My Pic 7.jpg
WIndows98.jpg
Helpers
Resources
E-mail.ico
rss.ico
RSSFeeder.mdb
RSSFeeder.csproj.user
RSSStarter.exe
RSSFeederResources
PublicQueue.ico
RSSFeeder.mdb
RSSFeederResources.csproj.user
RSSFeederSetup
Messages.ico
RSSFeederSetup.vdproj
Test
RSSStarter
DummyForm.frm
DummyForm.frx
MainModule.bas
RSSStarter.exe
RSSStarter.vbp
RSSStarter.vbw
RSSTests
App.ico
RSSTests.csproj.user
Thirdparty
AxInterop.DHTMLEDLib.dll
AxInterop.SHDocVw.dll
Eyefinder.dll
GotDotNet.Exslt.dll
HttpDownloader.dll
Interop.DHTMLEDLib.dll
Interop.SHDocVw.dll
Interop.WindowsInstaller.dll
Microsoft.ApplicationBlocks.Updater.ActivationProcessors.dll
Microsoft.ApplicationBlocks.Updater.dll
Microsoft.ApplicationBlocks.Updater.Downloaders.dll
Microsoft.Practices.EnterpriseLibrary.Caching.dll
Microsoft.Practices.EnterpriseLibrary.Common.dll
Microsoft.Practices.EnterpriseLibrary.Configuration.dll
Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.dll
Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.Logging.dll
Microsoft.Practices.EnterpriseLibrary.Logging.dll
Microsoft.Practices.EnterpriseLibrary.Security.Cache.CachingStore.dll
Microsoft.Practices.EnterpriseLibrary.Security.Cryptography.dll
Microsoft.Practices.EnterpriseLibrary.Security.dll
NotifyIconBalloon.dll
SandBar.dll
SandDock.dll
SgmlReaderDll.dll
// Copyright � 2005 by Omar Al Zabir. All rights are reserved.
// 
// If you like this code then feel free to go ahead and use it.
// The only thing I ask is that you don't remove or alter my copyright notice.
//
// Your use of this software is entirely at your own risk. I make no claims or
// warrantees about the reliability or fitness of this code for any particular purpose.
// If you make changes or additions to this code please mark your code as being yours.
// 
// website http://www.oazabir.com, email OmarAlZabir@gmail.com, msn oazabir@hotmail.com
using System;
using System.Text;
using System.IO;
using System.Xml;
using System.Xml.Serialization;
using System.Collections;
using System.Windows.Forms;
using Sgml;
namespace RSSBlogAPI
{
	using RSSCommon;
	using RSSCommon.Helper;

	/// <summary>
	/// Provides weblogging features
	/// </summary>
	[XmlRoot("weblogProvider")]
	[Serializable]
	public class WebLogProvider
	{
		public const string MD5_HASH_PROVIDER = "MD5CryptoServiceProvider";
		public readonly static WebLogProvider Instance = new WebLogProvider();

		public WebLogProvider() {}

		private ArrayList _WebLogs = new ArrayList();

		[XmlArray("weblogs"), XmlArrayItem("weblog", typeof(WebLog)) ]
		public ArrayList WebLogs
		{
			get { return _WebLogs; }
			set { _WebLogs = value; }
		}

		
		/// <summary>
		/// Load web log configurations
		/// </summary>
		public static void LoadWebLogs()
		{
			string webLogConfigPath = Path.Combine( ApplicationSettings.ApplicationDataPath, "weblogs.xml" );
			if( File.Exists( webLogConfigPath ) )
			{
				using( FileStream stream = new FileStream( webLogConfigPath, FileMode.Open ) )
				{
					WebLogProvider.Instance.WebLogs = SerializationHelper.DeserializeArraylist( stream, typeof( WebLog ) );
				}
			}
		}

		public static void SaveWebLogs()
		{	
			string webLogConfigPath = Path.Combine( ApplicationSettings.ApplicationDataPath, "weblogs.xml" );
			using( FileStream stream = new FileStream( webLogConfigPath, FileMode.Create ) )
			{
				SerializationHelper.Serialize( stream, WebLogProvider.Instance.WebLogs, typeof( WebLog ) );				
			}
		}

/*

		public void NewPost( WebLog log, Form parent )
		{
			using( PostForm form = new PostForm( ) )
			{
				form.SetWebLog( log );
				if( DialogResult.OK == form.ShowDialog( parent ) )
				{
					// Make a post
				}
			}
		}
		
		public bool EditWebLog(WebLog log, Form parent)
		{
			using( WebLogEditor form = new WebLogEditor() )
			{
				form.EditWebLog(log);

				if( DialogResult.OK == form.ShowDialog(parent) )
				{
					return true;
				}
			}

			return false;
		}
*/

		public string PostBlog( WebLog log, Post post )
		{
			this.FilterHtml( post );

			return this.GetBlogEngine( log ).PostItem( post );
		}

		private void FilterHtml( Post post )
		{
			if( post.Text.IndexOf("</") > 0 )
			{
				
				HtmlReader reader = new HtmlReader(post.Text); 
				reader.DocType ="HTML"; 
				
				StringBuilder builder = new StringBuilder();
				StringWriter writer = new StringWriter( builder );
				HtmlWriter w = new HtmlWriter(writer);
				
				// Set properties to filter out content
				w.FilterOutput = true;
				//w.AllowedAttributes = Configuration.Instance.AllowedAttributes;
				//w.AllowedTags = Configuration.Instance.AllowedTags;
				w.ReduceConsecutiveSpace = true;
				w.RemoveNewlines = true;

				reader.Read();

				// On this is on, we write to output
				bool writerOn = false;

				while(!reader.EOF)
				{
					if( null != reader.Name )
					{
						// If body tag starts, we turn on the writer to write inside body tag
						if( "body" == reader.Name.ToLower() )
						{
							if( reader.NodeType == XmlNodeType.Element )
								writerOn = true;
							else
								writerOn = false;							

							reader.Read(); // skip the body tag
						}

						if( writerOn )
						{
							w.WriteNode( reader, false );
						}
						else
							reader.Read();
					}
					else
					{
						reader.Read();
					}
				} 
				
				w.Flush();
				w.Close(); 
				
				post.Text = builder.ToString();
			}
		}

		/*
		public WebLog AddNewWeblog(Form parent)
		{
			using( WebLogEditor form = new WebLogEditor() )
			{
				if( DialogResult.OK == form.ShowDialog(parent) )
				{
					WebLog newWebLog = form.NewWebLog;
					_WebLogs.Add( newWebLog );
					return newWebLog;
				}
			}

			return null;
		}

		public void DeleteWebLog(WebLog log)
		{
			_WebLogs.Remove( log );
		}
		*/

		public void Test(WebLog log)
		{
			GetBlogEngine(log).Test();
		}

		public Category[] GetCategories(WebLog log)
		{
			return GetBlogEngine(log).GetCategories();
		}

		private BlogAPIBase GetBlogEngine( WebLog log )
		{
			BlogAPIBase api;
			if( log.Engine == EngineEnum.DotText )
			{
				api = new DotTextAPI();
			}
			else if( log.Engine == EngineEnum.CommunityServer )
			{
				api = new CommunityServerAPI();
			}
			else // if( log.Engine == EngineEnum.MetablogAPI )
			{
				api = new MetaWeblog( log );
			}

			api.Url = log.ServiceUrl;
			api.Username = log.UserName;

			// Decrypt password
			string password = RSSCommon.PropertyEditor.PasswordEditor.PasswordProvider.Decrypt( log.Password );

			if( log.SendPasswordHashed )
			{
				api.Password = RSSCommon.PropertyEditor.PasswordEditor.PasswordProvider.Hash( password );
			}
			else
			{
				api.Password = password;
			}
			
			api.BlogId = log.BlogId;
				
			if( Configuration.Instance.ProxyName.Length > 0 ) 
			{
				api.ProxyServer = new System.Net.WebProxy( 
					Configuration.Instance.ProxyName, 
					Configuration.Instance.ProxyPort );
			

				if( Configuration.Instance.ProxyUserName.Length > 0 ) 
				{
					string proxyPassword = RSSCommon.PropertyEditor.PasswordEditor.PasswordProvider.Decrypt( Configuration.Instance.ProxyUserPassword );

					api.ProxyServer.Credentials = new System.Net.NetworkCredential( 
						Configuration.Instance.ProxyUserName, proxyPassword );
				}
			}
			else
			{
				api.ProxyServer = System.Net.WebProxy.GetDefaultProxy();
			}

			return api;
		}
	}

}

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Omar Al Zabir
Architect BT, UK (ex British Telecom)
United Kingdom United Kingdom

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Article Copyright 2005 by Omar Al Zabir
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