LinkedIn full profile details using DotNetOpenAuth in MVC4 - asp.net-mvc-4

Question

My MVC4 application allows login using LinkedIn account. I want to pull all details that are avaible from linkedIn of the logged in User. Currently i have done the following.
In My AuthConfig.cs,
Dictionary<string, object> linkedInExtraData = new Dictionary<string, object>();
linkedInExtraData.Add("Icon", "../Images/linkedIn.png");
OAuthWebSecurity.RegisterClient(
client: new App_Start.LinkedInCustomClient("xxxxxxxxxxxx", "yyyyyyyyyyyyyyy"),
displayName: "LinkedIn",
extraData: linkedInExtraData);
In linkedInCustomClient.cs , from LinkedIn Developer Kit
public class LinkedInCustomClient : OAuthClient
{
private static XDocument LoadXDocumentFromStream(Stream stream)
{
var settings = new XmlReaderSettings
{
MaxCharactersInDocument = 65536L
};
return XDocument.Load(XmlReader.Create(stream, settings));
}
/// Describes the OAuth service provider endpoints for LinkedIn.
private static readonly ServiceProviderDescription LinkedInServiceDescription =
new ServiceProviderDescription
{
AccessTokenEndpoint =
new MessageReceivingEndpoint("https://api.linkedin.com/uas/oauth/accessToken",
HttpDeliveryMethods.PostRequest),
RequestTokenEndpoint =
new MessageReceivingEndpoint("https://api.linkedin.com/uas/oauth/requestToken?scope=r_fullprofile",
HttpDeliveryMethods.PostRequest),
UserAuthorizationEndpoint =
new MessageReceivingEndpoint("https://www.linkedin.com/uas/oauth/authorize",
HttpDeliveryMethods.PostRequest),
TamperProtectionElements =
new ITamperProtectionChannelBindingElement[] { new HmacSha1SigningBindingElement() },
ProtocolVersion = ProtocolVersion.V10a
};
public LinkedInCustomClient(string consumerKey, string consumerSecret) :
base("linkedIn", LinkedInServiceDescription, consumerKey, consumerSecret) { }
/// Check if authentication succeeded after user is redirected back from the service provider.
/// The response token returned from service provider authentication result.
[SuppressMessage("Microsoft.Design", "CA1031:DoNotCatchGeneralExceptionTypes",
Justification = "We don't care if the request fails.")]
protected override AuthenticationResult VerifyAuthenticationCore(AuthorizedTokenResponse response)
{
// See here for Field Selectors API http://developer.linkedin.com/docs/DOC-1014
const string profileRequestUrl =
"https://api.linkedin.com/v1/people/~:(id,first-name,last-name,interests,headline,industry,summary,email-address,location:(name),picture-url,positions,associations,languages,honors,educations,date-of-birth,primary-twitter-account,three-current-positions,three-past-positions,group-memberships,specialties,skills)";
string accessToken = response.AccessToken;
string tokenSecret = (response as ITokenSecretContainingMessage).TokenSecret;
string Verifier = response.ExtraData.Values.First();
var profileEndpoint =
new MessageReceivingEndpoint(profileRequestUrl, HttpDeliveryMethods.GetRequest);
HttpWebRequest request =
WebWorker.PrepareAuthorizedRequest(profileEndpoint, accessToken);
try
{
using (WebResponse profileResponse = request.GetResponse())
{
using (Stream responseStream = profileResponse.GetResponseStream())
{
XDocument document = LoadXDocumentFromStream(responseStream);
return new AuthenticationResult(
isSuccessful: true,
provider: ProviderName,
providerUserId: userId,
userName: userName,
extraData: extraData);
}
}
}
catch (Exception exception)
{
return new AuthenticationResult(exception);
}
}
}
In my controller,
AuthenticationResult result = OAuthWebSecurity.VerifyAuthentication(Url.Action("ExternalLoginCallback", new { ReturnUrl = returnUrl }));
if (!result.IsSuccessful)
{
return RedirectToAction("ExternalLoginFailure");
}
I need to get the following details in my controller as authentication result.
(id,first-name,last-name,interests,headline,industry,summary,email-address,location:(name),picture-url,positions,associations,languages,honors,educations,date-of-birth,primary-twitter-account,three-current-positions,three-past-positions,group-memberships,specialties,skills)

Answer 1

The response of your request from LinkedIn will be a xml file. The format and fields are mentioned in LinkedIn Profile Fields
For getting email field, you need to modify your request token url as
RequestTokenEndpoint = new MessageReceivingEndpoint("https://api.linkedin.com/uas/oauth/requestToken?scope=r_fullprofile+r_emailaddress",
HttpDeliveryMethods.PostRequest),
You can get the fields as required in the following code
XDocument document = LoadXDocumentFromStream(responseStream);
Eg : For getting the first name field from the xml file,
var firstName = document.Root.Element("first-name").Value;
Fields like languages, positions, skills etc will be returned as structured objects as part of the profile.
Eg : Language field.
var Lang = document.Root.Element("languages");
var languages = new List<string>();
if (Lang != null)
{
foreach (var l in Lang.Elements())
{
if (l.Element("language") != null && l.Element("language").Element("name") != null)
{
languages.Add(l.Element("language").Element("name").Value);
}
}
}
Then you can add fields to "extraData" which can be accessed in the controller.
extraData.Add("firstName", firstName);
extraData.Add("languages", lang);