Question

我很难在Web API上使用Facebook进行外部身份验证。这是我的控制器来处理Facebook按钮点击。

[Route("facebooklogin", Name= "FacebookLogin")]
    [ValidateAntiForgeryToken()]
    public async Task<ActionResult> FacebookLogin()
    {
        string facebookLink = string.Empty;
        //Get available logins from api
        using(HttpClient client = new HttpClient() { BaseAddress = new Uri(Request.Url.GetLeftPart(UriPartial.Authority)) })
        {
            var returnUrl = Url.RouteUrl("FacebookCallback");
            var url = "/api/Account/ExternalLogins?returnUrl=" + HttpUtility.UrlEncode(returnUrl + "&generateState=true");
            var response = await client.GetAsync(url);
            response.EnsureSuccessStatusCode();
            if (response.IsSuccessStatusCode)
            {
                var loginList = await response.Content.ReadAsAsync<List<ExternalLoginViewModel>>();
                facebookLink = loginList.Where(x => x.Name == "Facebook").Select(x => x.Url).FirstOrDefault();
                //Send a get request to the facebook url
                var facebookUrlResponse = await client.GetAsync(facebookLink);
                facebookUrlResponse.EnsureSuccessStatusCode();
            }
            else { }
        }
        return View();
    }

    [Route("facebookcallback", Name="FacebookCallback")]
    public ActionResult FacebookLoginCallback()
    {
        //Parse the access_token from facebook from the url


        return View();
    }

当我调试var facebookUrlResponse = await client.GetAsync(facebookLink);时，我意识到我的请求不好。我的代码获取所有可用的外部登录提供程序，然后尝试使用为Facebook生成的可用URL来命中帐户控制器中的/ api / Account / ExternalLogin端点。我无法击中该端点。

我收到此错误消息：

响应状态代码不表示成功：400（错误请求）。

我打算让重定向uri进入FacebookCallback路线。然后我可以从uri解析access_token并进行进一步的游行。有人可以帮帮我吗？

我可以从邮递员那里收集这些信息：

在执行当前Web请求期间发生了未处理的异常。请查看堆栈跟踪以获取有关错误及其源自代码的位置的更多信息。异常详细信息：System.Net.Http.HttpRequestException：响应状态代码不表示成功：400（错误请求）。

源错误是：

//向facebook网址发送获取请求第135行：var facebookUrlResponse = await client.GetAsync（facebookLink）;

这也是堆栈跟踪：

[HttpRequestException：响应状态代码不表示成功：400（错误请求）。] System.Net.Http.HttpResponseMessage.EnsureSuccessStatusCode（）+92180 Blinkas.Web.Controllers。＆lt; FacebookLogin＆gt; d__6.MoveNext（）在C：\ Users \ Williams \ Documents \ Visual Studio 2015 \ Projects \ Blinkas \ Blinkas.Web \ Controllers \ HomeController.cs：136 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务）+92 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务）+58 System.Runtime.CompilerServices.TaskAwaiter.GetResult（）+26 System.Threading.Tasks.TaskHelpersExtensions.ThrowIfFaulted（任务任务）+42 System.Web.Mvc.Async.TaskAsyncActionDescriptor.EndExecute（IAsyncResult asyncResult）+73 System.Web.Mvc.Async。＆lt;＆gt; c__DisplayClass37。＆lt; BeginInvokeAsynchronousActionMethod＆gt; b__36（IAsyncResult asyncResult）+37 System.Web.Mvc.Async.WrappedAsyncResult 1.CallEndDelegate(IAsyncResult asyncResult) +27 System.Web.Mvc.Async.WrappedAsyncResultBase 1.End（）+58 System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）+68 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod（IAsyncResult asyncResult）+34 System.Web.Mvc.Async.AsyncInvocationWithFilters。＆lt; InvokeActionMethodFilterAsynchronouslyRecursive＆gt; b__3d（）+69 System.Web.Mvc.Async。＆lt;＆gt; c__DisplayClass46。＆lt; InvokeActionMethodFilterAsynchronouslyRecursive＆gt; b__3f（）+ 230 System.Web.Mvc.Async。＆lt;＆gt; c__DisplayClass33。＆lt; BeginInvokeActionMethodWithFilters＆gt; b__32（IAsyncResult asyncResult）+27 System.Web.Mvc.Async.WrappedAsyncResult 1.CallEndDelegate(IAsyncResult asyncResult) +27 System.Web.Mvc.Async.WrappedAsyncResultBase 1.End（）+58 System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）+68 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters（IAsyncResult asyncResult）+34 System.Web.Mvc.Async。＆lt;＆gt; c__DisplayClass2b。＆lt; BeginInvokeAction＆gt; b__1c（）+42 System.Web.Mvc.Async。＆lt;＆gt; c__DisplayClass21。＆lt; BeginInvokeAction＆gt; b__1e（IAsyncResult asyncResult）+124 System.Web.Mvc.Async.WrappedAsyncResult 1.CallEndDelegate(IAsyncResult asyncResult) +27 System.Web.Mvc.Async.WrappedAsyncResultBase 1.End（）+58 System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）+30 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction（IAsyncResult asyncResult）+29 System.Web.Mvc.Controller。＆lt; BeginExecuteCore＆gt; b__1d（IAsyncResult asyncResult，ExecuteCoreState innerState）+27 System.Web.Mvc.Async.WrappedAsyncVoid 1.CallEndDelegate(IAsyncResult asyncResult) +48 System.Web.Mvc.Async.WrappedAsyncResultBase 1.End（）+58 System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）+30 System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）+21 System.Web.Mvc.Controller.EndExecuteCore（IAsyncResult asyncResult）+32 System.Web.Mvc.Controller。＆lt; BeginExecute＆gt; b__15（IAsyncResult asyncResult，Controller controller）+26 System.Web.Mvc.Async.WrappedAsyncVoid 1.CallEndDelegate(IAsyncResult asyncResult) +40 System.Web.Mvc.Async.WrappedAsyncResultBase 1.End（）+58 System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）+30 System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）+21 System.Web.Mvc.Controller.EndExecute（IAsyncResult asyncResult）+29 System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute（IAsyncResult asyncResult）+24 System.Web.Mvc.MvcHandler。＆lt; BeginProcessRequest＆gt; b__5（IAsyncResult asyncResult，ProcessRequestState innerState）+27 System.Web.Mvc.Async.WrappedAsyncVoid 1.CallEndDelegate(IAsyncResult asyncResult) +48 System.Web.Mvc.Async.WrappedAsyncResultBase 1.End（）+58 System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）+30 System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）+21 System.Web.Mvc.MvcHandler.EndProcessRequest（IAsyncResult asyncResult）+29 System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest（IAsyncResult result）+23 System.Web.CallHandlerExecutionStep.OnAsyncHandlerCompletion（IAsyncResult ar）+129

使用Facebook外部提供商

0 个答案: