Asp.Net

Here’s the final web.config section. The thing I needed to add I was missing was changing the staticFileHandler from using “all verbs” to all of them spelled out.

 <?xml version="1.0" encoding="utf-8"?>
<configuration>
  <appSettings>
    <add key="StorageRoot" value="C:\temp\"/>
  </appSettings>
  <system.web>
    <compilation debug="true" targetFramework="4.0" />
    <httpRuntime maxRequestLength="2147480000" executionTimeout="3600"/>
    <pages controlRenderingCompatibilityVersion="3.5" clientIDMode="AutoID"/>
   
  </system.web>
  <system.webServer>
   
    <modules>
      <remove name="WebDAVModule" />
    </modules>
    <handlers accessPolicy="Read, Write, Execute, Script">
      <remove name="StaticFile" />
      <remove name="SimpleHandlerFactory-ISAPI-2.0" />
      <remove name="WebDAV" />
      <remove name="SimpleHandlerFactory-Integrated-4.0" />
      <remove name="SimpleHandlerFactory-Integrated" />
      <add name="SimpleHandlerFactory-Integrated" path="*.ashx" verb="GET,HEAD,POST,DEBUG,PUT,DELETE" type="System.Web.UI.SimpleHandlerFactory" resourceType="Unspecified" requireAccess="Write" preCondition="integratedMode" />
      <add name="SimpleHandlerFactory-Integrated-4.0" path="*.ashx" verb="GET,HEAD,POST,DEBUG,PUT,DELETE" type="System.Web.UI.SimpleHandlerFactory" resourceType="Unspecified" requireAccess="Write" preCondition="integratedMode,runtimeVersionv4.0" />
      <add name="SimpleHandlerFactory-ISAPI-2.0" path="*.ashx" verb="GET,HEAD,POST,DEBUG,PUT,DELETE" modules="IsapiModule" scriptProcessor="%windir%\Microsoft.NET\Framework\v2.0.50727\aspnet_isapi.dll" resourceType="Unspecified" requireAccess="Script" preCondition="classicMode,runtimeVersionv2.0,bitness32" responseBufferLimit="0" />
      <add name="StaticFile" path="*" verb="GET,HEAD,POST,DEBUG,PUT,DELETE" modules="StaticFileModule,DefaultDocumentModule,DirectoryListingModule" resourceType="Either" requireAccess="Read" />
    </handlers>
    <security>
      <requestFiltering>
        <requestLimits maxAllowedContentLength="2147480000"/>
      </requestFiltering>
      <authorization>
        <remove users="*" roles="" verbs="" />
        <add accessType="Allow" users="*" verbs="GET,HEAD,POST,PUT,DELETE,DEBUG" />
      </authorization>
    </security>
    <tracing>
      <traceFailedRequests>
        <remove path="*" />
        <add path="*">
          <traceAreas>
            <add provider="ASP" verbosity="Verbose" />
            <add provider="ASPNET" areas="Infrastructure,Module,Page,AppServices" verbosity="Verbose" />
            <add provider="ISAPI Extension" verbosity="Verbose" />
            <add provider="WWW Server" areas="Authentication,Security,Filter,StaticFile,CGI,Compression,Cache,RequestNotifications,Module,FastCGI" verbosity="Verbose" />
          </traceAreas>
          <failureDefinitions statusCodes="405" />
        </add>
      </traceFailedRequests>
    </tracing>
  </system.webServer>
</configuration>

I struggled with one issue for hours, before realizing that IIS7 was the culprit. Even though maxrequestlength was set to 1GB in httpclientrequest (web.config) and executiontimeout was set to 600 seconds, for a larger file it would keep failing. Firebug was throwing a “404 not found” error for the handler.ashx!

IS has a security feature called requestFiltering, which is to prevent denial of service attacks. It sets the file size to 30MB maximum by default.
To change it, add the following to youor system.webServer section of web.config

   <security>
      <requestFiltering>
        <requestLimits maxAllowedContentLength="2147480000"/>
      </requestFiltering>
</security>	     
             

Here maxAllowedContentLength is set to 2 GB approx.

When you build the project visuals studio gives the error as below.

Error 2 The command “xcopy /Q /Y E:\My Projects\test\*.*
E:\My Projects\bin\” exited with code 4.

Go to project Properties > Build Events

In Post-build event section you may find something like this: xcopy “$(ProjectDir)Library\dsoframer.ocx” “$(TargetDir)” /Y /E /D1

Remove this line. Save All. Build the Project again.

Error resolved. 🙂

For LinkedIn Authentication I have utilized LinkedIn Rest API which use oAuth 1.0 to authorize users and begin making REST API calls using any programming language. Complete understanding tutorials are placed at https://developer.linkedin.com/documents/oauth-overview

Following are the steps to implement LinkedIn Authentication in ASP.Net

Step 1 Installations

Install Hammock Library from CodePlex.com, Hammock is a REST library for .Net that greatly simplifies consuming Restful services.
Configure NuGet (optional to ease referencing code plex libraries directly in Visual Studio project). You can also get the NuGet from http://nuget.codeplex.com/

Step 2 Create LinkedIn Application in LinkedIn developer platform

Go to https://www.linkedin.com/secure/developer
Sign in with your LinkedIn credentials.
Click on Add New Application and fill in the form.
Once your application is created note the API Key and Secret Key that we will use to implement LinkedIn authentication in our application.

Step 3 Create ASP.Net Application

Open Visual Studio and create a new Web Application project.
Add references to Hammock library either by manually referencing from folder or just referencing through NuGet in Visual Studio Directly as shown below.

public
void RequestTokenAndAuthorize()

{

var credentials = new Hammock.Authentication.OAuth.OAuthCredentials

{

CallbackUrl = “http://localhost/LinkedInAuthWebSite/Callback.aspx”,

ConsumerKey = “API Key”,

ConsumerSecret = “Secret Key”,

Type = Hammock.Authentication.OAuth.OAuthType.RequestToken

};

var client = new Hammock.RestClient

{

Authority = “https://api.linkedin.com/uas/oauth”, Credentials = credentials };

var request = new Hammock.RestRequest { Path = “requestToken” };

Hammock.RestResponse response = client.Request(request);

String[] strResponseAttributes = response.Content.Split(‘&’);

string token = strResponseAttributes[0].Substring(strResponseAttributes[0].LastIndexOf(‘=’) + 1);

string authToken = strResponseAttributes[1].Substring(strResponseAttributes[1].LastIndexOf(‘=’) + 1);

Session[“Token”] = token;

Session[“TokenSecret”] = authToken;

Response.Redirect(“https://www.linkedin.com/uas/oauth/authorize?oauth_token=” + token);

}

CallBack URL will be called when the authorization is successfully done by LinkedIn.

Now Create a CallBack page where the callback takes place when the authorization is done after successful login. In my case I have created a Callback.aspx.
In the Callback page place following code in the Page_Load method.

protected
void Page_Load(object sender, EventArgs e)

{

String verifier = Request.QueryString[“oauth_verifier”].ToString();

Session[“Verifier”] = verifier;

var credentials = new Hammock.Authentication.OAuth.OAuthCredentials

{

ConsumerKey = “API Key”,

ConsumerSecret = “Secret Key”,

Token = Session[“Token”].ToString(),

TokenSecret = Session[“TokenSecret”].ToString(),

Verifier = verifier,

Type = Hammock.Authentication.OAuth.OAuthType.AccessToken,

ParameterHandling = Hammock.Authentication.OAuth.OAuthParameterHandling.HttpAuthorizationHeader,

SignatureMethod = Hammock.Authentication.OAuth.OAuthSignatureMethod.HmacSha1,

Version = “1.0″

};

var client = new
RestClient { Authority = “https://api.linkedin.com/uas/oauth”, Credentials = credentials, Method = WebMethod.Post };

var request = new
RestRequest { Path = “accessToken” };

RestResponse response = client.Request(request);

String[] strResponseAttributes = response.Content.Split(‘&’);

string token = strResponseAttributes[0].Substring(strResponseAttributes[0].LastIndexOf(‘=’) + 1);

string authToken = strResponseAttributes[1].Substring(strResponseAttributes[1].LastIndexOf(‘=’) + 1);

Session[“AccessToken”] = token;

Session[“AccessSecretToken”] = authToken;

GetUserProfile();

}

GetUserProfile method is used to get the Logged in User First Name and Last name to display on Callback page.

public
void GetUserProfile()

{

var request = new
RestRequest

{

Path = “~”

};

var credentials = new Hammock.Authentication.OAuth.OAuthCredentials

{

Type = Hammock.Authentication.OAuth.OAuthType.AccessToken,

SignatureMethod = Hammock.Authentication.OAuth.OAuthSignatureMethod.HmacSha1,

ParameterHandling = Hammock.Authentication.OAuth.OAuthParameterHandling.HttpAuthorizationHeader,

ConsumerKey = “API Key”,

ConsumerSecret = “Secret Key”,

Token = Session[“AccessToken”].ToString(),

TokenSecret = Session[“AccessSecretToken”].ToString(),

Verifier = Session[“Verifier”].ToString()

};

var client = new
RestClient()

{

Authority = “http://api.linkedin.com/v1/people”, Credentials = credentials, Method = WebMethod.Get

};

var MyInfo = client.Request(request);

String content = MyInfo.Content.ToString();

var person = from c in
XElement.Parse(content).Elements()

select c;

String fullName=String.Empty;

foreach (var element in person)

{

if((element.Name == “first-name”) || (element.Name==“last-name”))

fullName += element.Value.ToString();

}

lblName.Text = fullName;

}

Step 4 Run the Application

Download source code: here

Download MVC Code: Here

Download Asp.Net Code: Here