1 public class OAuthController : Controller
 2     {
 3         private static string _authorizeUrl = ConfigurationManager.AppSettings["AuthorizeUrl"];
 4         private static string[] _queryParameters = new string[] { "client_id", "redirect_uri", "state", "response_type", "scope" };
 5         private readonly AuthorizationServer _authorizationServer = new AuthorizationServer(new OAuth2AuthorizationServer());
 6         
 7         [AcceptVerbs(HttpVerbs.Get)]
 8         public ActionResult Authorize(string userkey)
 9         {
10             var pendingRequest = this._authorizationServer.ReadAuthorizationRequest(Request);
11             if (pendingRequest == null)
12             {
13                 throw new HttpException((int)HttpStatusCode.BadRequest, "Missing authorization request.");
14             }
15 
16             if (string.IsNullOrEmpty(userkey))
17             {
18                 string url = _authorizeUrl, callback = Request.Url.GetLeftPart(UriPartial.Path);
19                 StringBuilder querystring = new StringBuilder(string.Format("client_id={0}&", HttpUtility.UrlEncode(this.Request.QueryString["client_id"]))), callbackQuery = new StringBuilder();
20                 foreach (string key in this.Request.QueryString.Keys)
21                 {
22                     if (!_queryParameters.Contains(key))
23                         querystring.Append(string.Format("{0}={1}&", key, HttpUtility.UrlEncode(this.Request.QueryString[key])));
24                     else
25                         callbackQuery.Append(string.Format("{0}={1}&", key, HttpUtility.UrlEncode(this.Request.QueryString[key])));
26                 }
27                 if (callbackQuery.Length > 0)
28                 {
29                     callback += ("?" + callbackQuery.ToString().TrimEnd('&'));
30                     querystring.Append(string.Format("callback={0}&", HttpUtility.UrlEncode(callback)));
31                 }
32                 if (querystring.Length > 0)
33                 {
34                     url += ("?" + querystring.ToString().TrimEnd('&'));
35                 }
36                 return Redirect(url);
37             }
38             else
39             {
40                 using (var db = new OAuthDbContext())
41                 {
42                     var client = db.Clients.FirstOrDefault(o => o.ClientIdentifier == pendingRequest.ClientIdentifier);
43                     if (client == null)
44                         throw new AuthorizeException("40143", "不受信任的商戶");
45                     else
46                     {
47                         var user = DESCrypt.Decrypt(userkey, client.ClientSecret);
48                         var approval = this._authorizationServer.PrepareApproveAuthorizationRequest(pendingRequest, user);
49                         var response = this._authorizationServer.Channel.PrepareResponse(approval);
50                         return response.AsActionResult();
51                     }
52                 }
53             }
54         }
55 
56         public ActionResult Index()
57         {
58             ViewBag.Body = "Welcome To OAuth2.0";
59             return View();
60         }
61     }