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  • Security exception in Twitterizer

    - by Raghu
    Hi, We are using Twitterizer for Twitter integration to get the Tweets details. When making call to the method OAuthUtility.GetRequestToken, following exception is coming. System.Security.SecurityException: Request for the permission of type 'System.Net.WebPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed. When the application is hosted on IIS 5, the application works fine and the above error is coming only when the application is hosted in IIS 7 on Windows 2008 R2. and the method OAuthUtility.GetRequestToken throws above exception. It seems the issue is something with code access security. Please suggest what kind of permissions should be given to fix the security exception. The application has the Full Trust and I have even tried by registering the Twitterizer DLL in GAC and still the same error is coming. I am not sure what makes the difference between IIS 5 and IIS 7 with regards to code access security to cause that exception. Following is the stack track of the exception. [SecurityException: Request for the permission of type 'System.Net.WebPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.] System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet) +0 System.Security.CodeAccessPermission.Demand() +54 Twitterizer.OAuthUtility.ExecuteRequest(String baseUrl, Dictionary`2 parameters, HTTPVerb verb, String consumerKey, String consumerSecret, String token, String tokenSecret, WebProxy proxy) +224 Twitterizer.OAuthUtility.GetRequestToken(String consumerKey, String consumerSecret, String callbackAddress, WebProxy proxy) +238 Twitter._Default.btnSubmit_Click(Object sender, EventArgs e) +94 System.Web.UI.WebControls.Button.OnClick(EventArgs e) +115 System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +140 System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +29 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +11045655 System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +11045194 System.Web.UI.Page.ProcessRequest() +91 System.Web.UI.Page.ProcessRequest(HttpContext context) +240 ASP.authorization_aspx.ProcessRequest(HttpContext context) in c:\Windows\Microsoft.NET\Framework64\v2.0.50727\Temporary ASP.NET Files\twitter\c2fd5853\dcb96ae9\App_Web_y_ada-ix.0.cs:0 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +599 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +171 Any help would be greatly appreciated. Thanks in advance. Regards, Raghu

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  • Security exception in Twitterizer [closed]

    - by Raghu
    Possible Duplicate: Security exception in Twitterizer Hi, We are using Twitterizer for Twitter integration to get the Tweets details. When making call to the method OAuthUtility.GetRequestToken, following exception is coming. System.Security.SecurityException: Request for the permission of type 'System.Net.WebPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed. When the application is hosted on IIS 5, the application works fine and the above error is coming only when the application is hosted in IIS 7 on Windows 2008 R2. and the method OAuthUtility.GetRequestToken throws above exception. It seems the issue is something with code access security. Please suggest what kind of permissions should be given to fix the security exception. The application has the Full Trust and I have even tried by registering the Twitterizer DLL in GAC and still the same error is coming. I am not sure what makes the difference between IIS 5 and IIS 7 with regards to code access security to cause that exception. Any help would be greatly appreciated. Thanks in advance. Regards, Raghu

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  • How to get twitter user timeline in C# using Twitterizer

    - by Adeel
    i have the following code. Twitter t1 = new Twitter("twitteruser","password"); TwitterUser user = t1.User.Show("username"); if (user != null) { TwitterParameters param = new TwitterParameters(); param.Add(TwitterParameterNames.UserID, user.ID); TwitterStatusCollection t =t1.Status.UserTimeline(param); } In the above code, I want to get user timeline. I am using Twitterizer API. The twitter documentation for getting timeline of user is Here I have checked the fiddler whats going on. In fiddler the request is : http://api.twitter.com/1/direct_messages.xml?user_id=xxxxx while i am expecting http://twitter.com/statuses/user_timeline.format Is anything left which i miss.

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  • twitter api is throwing exception "# is not a valid value for Int32" while getting freinds

    - by vakas
    i am using the api twitterizer.framework while getting the friends of a user the api starts throwing this error. "# is not a valid value for Int32. --- System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: startIndex at System.ParseNumbers.StringToInt(String s, Int32 radix, Int32 flags, Int32* currPos) at System.Convert.ToInt32(String value, Int32 fromBase) at System.ComponentModel.Int32Converter.FromString(String value, Int32 radix) at System.ComponentModel.BaseNumberConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value) --- End of inner exception stack trace --- at System.ComponentModel.BaseNumberConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value) at System.ComponentModel.TypeConverter.ConvertFromString(ITypeDescriptorContext context, CultureInfo culture, String text) at System.Drawing.ColorConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value) at System.ComponentModel.TypeConverter.ConvertFromString(String text) at System.Drawing.ColorTranslator.FromHtml(String htmlColor) at Twitterizer.Framework.TwitterRequest.ParseUserNode(XmlNode element) in C:\Projects\twitterizer\Twiterizer.Framework\TwitterRequest.cs:line 514 at Twitterizer.Framework.TwitterRequest.ParseUsers(XmlElement element) in C:\Projects\twitterizer\Twiterizer.Framework\TwitterRequest.cs:line 483 at Twitterizer.Framework.TwitterRequest.ParseResponseData(TwitterRequestData data) in C:\Projects\twitterizer\Twiterizer.Framework\TwitterRequest.cs:line 305" how to handle this?

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  • How can I get the next page of friends using the Twitter API?

    - by vakas
    I am using the api twitterizer2 downloaded from http://code.google.com/p/twitterizer/downloads/list but when I try to get the friends of a user I get 100 friends but I can't get the next 100 friends through the NextPage function. How can I handle this...? Twitterizer.TwitterUserCollection userFollowing = Tw.TwitterUser.GetFriends(tokens,TwitterUrl); Twitterizer.TwitterUserCollection page2=userFollowing.NextPage; When I get the next page it returns the same 100 users.

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  • Integrating Twitter Into An ASP.NET Website Using OAuth

    Earlier this year I wrote an article about <a href="http://www.twitterizer.net/">Twitterizer</a>, an open-source .NET library that can be used to integrate your application with <a href="http://twitter.com/">Twitter</a>. Using Twitterizer you can allow your visitors to post tweets, view their timeline, and much more, all without leaving your website. The original article, <a href="http://www.4guysfromrolla.com/articles/021710-1.aspx">Integrating Twitter Into An ASP.NET Website</a>, showed how to post tweets and view a timeline to a particular Twitter account using Twitterizer 1.0. To post a tweet to a specific account, Twitterizer 1.0 uses <i>basic authentication</i>. Basic authentication is a very simple

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  • Twitter integration with C#.NET applications - NULL Pointer Exception

    - by Kanini
    Trying to integrate Twitter with ASP.NET application (Code in C#). This is the code I have written for the first sign in to Twitter. When I debug the application, I do get the token response and the response redirect happens appropriately. However, if I host it on IIS and access it, I get a Null Pointer Exception. Why is that? //Retrieve consumerKey and consumerSecret var v_consumerKey = ConfigurationManager.AppSettings["consumerKey"]; var v_consumerSecret = ConfigurationManager.AppSettings["consumerSecret"]; //Check if user is a valid user if (Request.QueryString["oauth_token"] == null) { OAuthTokenResponse t_requestToken = OAuthUtility.GetRequestToken(v_consumerKey, v_consumerSecret); Response.Redirect("http://twitter.com/oauth/authorize?oauth_token=" + t_requestToken.Token); } else { string s_oAuthToken = Request.QueryString["oauth_token"].ToString(); var v_accessToken = OAuthUtility.GetAccessToken(v_consumerKey,v_consumerSecret,s_oAuthToken); }

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  • Integrating Twitter Into An ASP.NET Website Using OAuth

    Earlier this year I wrote an article about Twitterizer, an open-source .NET library that can be used to integrate your application with Twitter. Using Twitterizer you can allow your visitors to post tweets, view their timeline, and much more, all without leaving your website. The original article, Integrating Twitter Into An ASP.NET Website, showed how to post tweets and view a timeline to a particular Twitter account using Twitterizer 1.0. To post a tweet to a specific account, Twitterizer 1.0 uses basic authentication. Basic authentication is a very simple authentication scheme. For an application to post a tweet to JohnDoe's Twitter account, it would submit JohnDoe's username and password (along with the tweet text) to Twitter's servers. Basic authentication, while easy to implement, is not an ideal authentication scheme as it requires that the integrating application know the username(s) and password(s) of the accounts that it is connected to. Consequently, a user must share her password in order to connect her Twitter account with the application. Such password sharing is not only insecure, but it can also cause difficulties down the line if the user changes her password or decides that she no longer wants to connect her account to certain applications (but wants to remain connected to others). To remedy these issues, Twitter introduced support for OAuth, which is a simple, secure protocol for granting API access. In a nutshell, OAuth allows a user to connect an application to their Twitter account without having to share their password. Instead, the user is sent to Twitter's website where they confirm whether they want to connect to the application. Upon confirmation, Twitter generates an token that is then sent back to the application. The application then submits this token when integrating with the user's account. The token serves as proof that the user has allowed this application access to their account. (Twitter users can view what application's they're connected to and may revoke these tokens on an application-by-application basis.) In late 2009, Twitter announced that it was ending its support for basic authentication in June 2010. As a result, the code examined in Integrating Twitter Into An ASP.NET Website, which uses basic authentication, will no longer work once the cut off date is reached. The good news is that the Twitterizer version 2.0 supports OAuth. This article examines how to use Twitterizer 2.0 and OAuth from a website. Specifically, we'll see how to retrieve and display a user's latest tweets and how to post a tweet from an ASP.NET page. Read on to learn more! Read More >Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Integrating Twitter Into An ASP.NET Website Using OAuth

    Earlier this year I wrote an article about Twitterizer, an open-source .NET library that can be used to integrate your application with Twitter. Using Twitterizer you can allow your visitors to post tweets, view their timeline, and much more, all without leaving your website. The original article, Integrating Twitter Into An ASP.NET Website, showed how to post tweets and view a timeline to a particular Twitter account using Twitterizer 1.0. To post a tweet to a specific account, Twitterizer 1.0 uses basic authentication. Basic authentication is a very simple authentication scheme. For an application to post a tweet to JohnDoe's Twitter account, it would submit JohnDoe's username and password (along with the tweet text) to Twitter's servers. Basic authentication, while easy to implement, is not an ideal authentication scheme as it requires that the integrating application know the username(s) and password(s) of the accounts that it is connected to. Consequently, a user must share her password in order to connect her Twitter account with the application. Such password sharing is not only insecure, but it can also cause difficulties down the line if the user changes her password or decides that she no longer wants to connect her account to certain applications (but wants to remain connected to others). To remedy these issues, Twitter introduced support for OAuth, which is a simple, secure protocol for granting API access. In a nutshell, OAuth allows a user to connect an application to their Twitter account without having to share their password. Instead, the user is sent to Twitter's website where they confirm whether they want to connect to the application. Upon confirmation, Twitter generates an token that is then sent back to the application. The application then submits this token when integrating with the user's account. The token serves as proof that the user has allowed this application access to their account. (Twitter users can view what application's they're connected to and may revoke these tokens on an application-by-application basis.) In late 2009, Twitter announced that it was ending its support for basic authentication in June 2010. As a result, the code examined in Integrating Twitter Into An ASP.NET Website, which uses basic authentication, will no longer work once the cut off date is reached. The good news is that the Twitterizer version 2.0 supports OAuth. This article examines how to use Twitterizer 2.0 and OAuth from a website. Specifically, we'll see how to retrieve and display a user's latest tweets and how to post a tweet from an ASP.NET page. Read on to learn more! Read More >

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  • i cant get the next page of friends using the twitter api

    - by vakas
    i am using the api twitterizer2 downloaded from http://code.google.com/p/twitterizer/downloads/list but when i try to get the friends of a user i get 100 friends but i cant get the next 100 friends thru NEXTpage function how to handle this...? Twitterizer.TwitterUserCollection userFollowing = Tw.TwitterUser.GetFriends(tokens,TwitterUrl); Twitterizer.TwitterUserCollection page2=userFollowing.NextPage when i get the next page it returns the same 100 users

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  • Are there any StatusNet toolkits for .NET?

    - by Broam
    There are plenty of projects out there that assist developers in posting things to Twitter; the one I can think of off the top of my head is Twitterizer. Are there any projects for posting to StatusNet? Given that StatusNet implements an API very similar to Twitter, I could probably modify/extend Twitterizer to do just that. However, I'd like to avoid reinventing the wheel if at all possible if something exists already.

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  • Integrating Twitter Into An ASP.NET Website

    Twitter is a popular social networking web service for writing and sharing short messages. These tidy text messages are referred to as tweets and are limited to 140 characters. Users can leave tweets and follow other users directly from Twitter's website or by using the Twitter API. Twitter's API makes it possible to integrate Twitter with external applications. For example, you can use the Twitter API to display your latest tweets on your blog. A mom and pop online store could integrate Twitter such that a new tweet was added each time a customer completed an order. And ELMAH, a popular open-source error logging library, can be configured to send error notifications to Twitter. Twitter's API is implemented over HTTP using the design principles of Representational State Transfer (REST). In a nutshell, inter-operating with the Twitter API involves a client - your application - sending an XML-formatted message over HTTP to the server - Twitter's website. The server responds with an XML-formatted message that contains status information and data. While you can certainly interface with this API by writing your own code to communicate with the Twitter API over HTTP along with the code that creates and parses the XML payloads exchanged between the client and server, such work is unnecessary since there are many community-created Twitter API libraries for a variety of programming frameworks. This article shows how to integrate Twitter with an ASP.NET website using the Twitterizer library, which is a free, open-source .NET library for working with the Twitter API. Specifically, this article shows how to retrieve your latest tweets and how to post a tweet using Twitterizer. Read on to learn more! Read More >

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  • Integrating Twitter Into An ASP.NET Website

    Twitter is a popular social networking web service for writing and sharing short messages. These tidy text messages are referred to as tweets and are limited to 140 characters. Users can leave tweets and follow other users directly from Twitter's website or by using the Twitter API. Twitter's API makes it possible to integrate Twitter with external applications. For example, you can use the Twitter API to display your latest tweets on your blog. A mom and pop online store could integrate Twitter such that a new tweet was added each time a customer completed an order. And ELMAH, a popular open-source error logging library, can be configured to send error notifications to Twitter. Twitter's API is implemented over HTTP using the design principles of Representational State Transfer (REST). In a nutshell, inter-operating with the Twitter API involves a client - your application - sending an XML-formatted message over HTTP to the server - Twitter's website. The server responds with an XML-formatted message that contains status information and data. While you can certainly interface with this API by writing your own code to communicate with the Twitter API over HTTP along with the code that creates and parses the XML payloads exchanged between the client and server, such work is unnecessary since there are many community-created Twitter API libraries for a variety of programming frameworks. This article shows how to integrate Twitter with an ASP.NET website using the Twitterizer library, which is a free, open-source .NET library for working with the Twitter API. Specifically, this article shows how to retrieve your latest tweets and how to post a tweet using Twitterizer. Read on to learn more! Read More >

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  • How do I store the OAuth v1 consumer key and secret for an open source desktop Twitter client without revealing it to the user?

    - by Justin Dearing
    I want to make a thick-client, desktop, open source twitter client. I happen to be using .NET as my language and Twitterizer as my OAuth/Twitter wrapper, and my app will likely be released as open source. To get an OAuth token, four pieces of information are required: Access Token (twitter user name) Access Secret (twitter password) Consumer Key Consumer Secret The second two pieces of information are not to be shared, like a PGP private key. However, due to the way the OAuth authorization flow is designed, these need to be on the native app. Even if the application was not open source, and the consumer key/secret were encrypted, a reasonably skilled user could gain access to the consumer key/secret pair. So my question is, how do I get around this problem? What is the proper strategy for a desktop Twitter client to protect its consumer key and secret?

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  • Post "Hello World" to twitter from .NET application

    - by cf_PhillipSenn
    My client would like me to use .NET to post to Twitter, and suggests that I use C#. Q: How do I post "Hello World" to twitter using C#? This post mentions a library called twitterizer. Isn't there a native way to do it without using a 3rd party library? (Maybe not since authentication is one of the requirements).

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  • Proxy Authentication in .NET - for external API

    - by n0vic3c0d3r
    I'm developing a twitter messaging utility using Twitter API (twitterizer). But since I'm within a corporate proxy, I'm getting the error '407 Proxy Authentication Required'. Is there any way to authenticate the user before calling the API or use the default proxy settings? P.S Internally the API is using HttpWebRequest.

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  • A Gentle Introduction to NuGet

    - by Joe Mayo
    Not too long ago, Microsoft released, NuGet, an automated package manager for Visual Studio.  NuGet makes it easy to download and install assemblies, and their references, into a Visual Studio project.  These assemblies, which I loosely refer to as packages, are often open source, and include projects such as LINQ to Twitter. In this post, I'll explain how to get started in using NuGet with your projects to include: installng NuGet, installing/uninstalling LINQ to Twitter via console command, and installing/uninstalling LINQ to Twitter via graphical reference menu. Installing NuGet The first step you'll need to take is to install NuGet.  Visit the NuGet site, at http://nuget.org/, click on the Install NuGet button, and download the NuGet.Tools.vsix installation file, shown below. Each browser is different (i.e. FireFox, Chrome, IE, etc), so you might see options to run right away, save to a location, or access to the file through the browser's download manager.  Regardless of how you receive the NuGet installer, execute the downloaded NuGet.Tools.vsix to install Nuget into visual Studio. The NuGet Footprint When you open visual Studio, observe that there is a new menu option on the Tools menu, titled Library Package Manager; This is where you use NuGet.  There are two menu options, from the Library Package Manager Menu that you can use: Package Manager Console and Package Manager Settings.  I won't discuss Package Manager Settings in this post, except to give you a general idea that, as one of a set of capabilities, it manages the path to the NuGet server, which is already set for you. Another menu, added by the NuGet installer, is Add Library Package Reference, found by opening the context menu for either a Solution Explorer project or a project's References folder or via the Project menu.  I'll discuss how to use this later in the post. The following discussion is concerned with the other menu option, Package Manager Console, which allows you to manage NuGet packages. Gettng a NuGet Package Selecting Tools -> Library Package Manager -> Package Manager Console opens the Package Manager Console.  As you can see, below, the Package Manager Console is text-based and you'll need to type in commands to work with packages. In this post, I'll explain how to use the Package Manager Console to install LINQ to Twitter, but there are many more commands, explained in the NuGet Package Manager Console Commands documentation.  To install LINQ to Twitter, open your current project where you want LINQ to Twitter installed, and type the following at the PM> prompt: Install-Package linqtotwitter If all works well, you'll receive a confirmation message, similar to the following, after a brief pause: Successfully installed 'linqtotwitter 2.0.20'. Successfully added 'linqtotwitter 2.0.20' to NuGetInstall. Also, observe that a reference to the LinqToTwitter.dll assembly was added to your current project. Uninstalling a NuGet Package I won't be so bold as to assume that you would only want to use LINQ to Twitter because there are other Twitter libraries available; I recommend Twitterizer if you don't care for LINQ to Twitter.  So, you might want to use the following command at the PM> prompt to remove LINQ to Twitter from your project: Uninstall-Package linqtotwitter After a brief pause, you'll see a confirmation message similar to the following: Successfully removed 'linqtotwitter 2.0.20' from NuGetInstall. Also, observe that the LinqToTwitter.dll assembly no longer appears in your project references list. Sometimes using the Package Manager Console is required for more sophisticated scenarios.  However, LINQ to Twitter doesn't have any dependencies and is a very simple install, so you can use another method of installing graphically, which I'll show you next. Graphical Installations As explained earlier, clicking Add Library Package Reference, from the context menu for either a Solution Explorer project or a project's References folder or via the Project menu opens the Add Library Package Reference window. This window will allow you to add a reference a NuGet package in your project. To the left of the window are a few accordian folders to help you find packages that are either on-line or already installed.  Just like the previous section, I'll assume you are installing LINQ to Twitter for the first time, so you would select the Online folder and click All.  After waiting for package descriptions to download, you'll notice that there are too many to scroll through in a short period of time, over 900 as I write this.  Therefore, use the search box located at the top right corner of the window and type LINQ to Twitter as I've done in the previous figure. You'll see LINQ to Twitter appear in the list. Click the Install button on the LINQ to Twitter entry. If the installation was successful, you'll see a message box display and disappear quickly (or maybe not if your machine is very fast or you blink at that moment). Then you'll see a reference to the LinqToTwitter.dll assembly in your project's references list. Note: While running this demo, I ran into an issue where VS had created a file lock on an installation folder without releasing it, causing an error with "packagename already exists. Skipping..." and then an error describing that it couldn't write to a destination folder.  I resolved the problem by closing and reopening VS. If you open the Add a Library Package Reference window again, you'll see LINQ to Twitter listed in the Recent packages folder. Summary You can install NuGet via the on-line home page with a click of a button.  Nuget provides two ways to work with packages, via console or graphical window.  While the graphical window is easiest, the console window is more powerful. You can now quickly add project references to many available packages via the NuGet service. Joe

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