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namespace OAuth2ProtectedWebApi.Controllers {
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Security.Principal;
using System.Threading.Tasks;
using System.Web;
using System.Web.Mvc;
using System.Web.Security;
using DotNetOpenAuth.Messaging;
using DotNetOpenAuth.OAuth2;
using DotNetOpenAuth.OAuth2.Messages;
using DotNetOpenAuth.OpenId;
using DotNetOpenAuth.OpenId.RelyingParty;
using OAuth2ProtectedWebApi.Code;
public class UserController : Controller {
[Authorize]
[HttpGet]
[HttpHeader("x-frame-options", "SAMEORIGIN")] // mitigates clickjacking
public async Task<ActionResult> Authorize() {
var authServer = new AuthorizationServer(new AuthorizationServerHost());
var authRequest = await authServer.ReadAuthorizationRequestAsync(this.Request);
this.ViewData["scope"] = authRequest.Scope;
this.ViewData["request"] = this.Request.Url;
return View();
}
[Authorize]
[HttpPost, ValidateAntiForgeryToken]
public async Task<ActionResult> Respond(string request, bool approval) {
var authServer = new AuthorizationServer(new AuthorizationServerHost());
var authRequest = await authServer.ReadAuthorizationRequestAsync(new Uri(request));
IProtocolMessage responseMessage;
if (approval) {
responseMessage = authServer.PrepareApproveAuthorizationRequest(
authRequest, this.User.Identity.Name, authRequest.Scope);
} else {
responseMessage = authServer.PrepareRejectAuthorizationRequest(authRequest);
}
var response = await authServer.Channel.PrepareResponseAsync(responseMessage);
return response.AsActionResult();
}
public async Task<ActionResult> Login(string returnUrl) {
var rp = new OpenIdRelyingParty(null);
Realm officialWebSiteHome = Realm.AutoDetect;
Uri returnTo = new Uri(this.Request.Url, this.Url.Action("Authenticate"));
var request = await rp.CreateRequestAsync(WellKnownProviders.Google, officialWebSiteHome, returnTo);
if (returnUrl != null) {
request.SetUntrustedCallbackArgument("returnUrl", returnUrl);
}
var redirectingResponse = await request.GetRedirectingResponseAsync();
return redirectingResponse.AsActionResult();
}
public async Task<ActionResult> Authenticate() {
var rp = new OpenIdRelyingParty(null);
var response = await rp.GetResponseAsync(this.Request);
if (response != null) {
if (response.Status == AuthenticationStatus.Authenticated) {
FormsAuthentication.SetAuthCookie(response.ClaimedIdentifier, false);
return this.Redirect(FormsAuthentication.GetRedirectUrl(response.ClaimedIdentifier, false));
}
}
return this.RedirectToAction("Index", "Home");
}
}
}
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