0

所以我基本上是在尝试使用 Foursquare 的场地 API，但每当我发送 API 请求时都会出现奇怪的错误。

首先，我使用以下代码进行身份验证；

var foursquareClient = new FoursquareClient(this);
        if(!foursquareClient.IsAuthenticated)
            foursquareClient.Authenticate();`

验证码；

public void Authenticate()
    {
        Log.Verbose(Logging.AppTag, "FourSquareClient:Authenticate()");

        if (this.IsAuthenticated)
        {
            Log.Debug(Logging.AppTag, "FourSquareClient is already authenticated! ");
            return;
        }

        this._authenticator = new OAuth2Authenticator(
            clientId: ClientId,
            scope: "",
            authorizeUrl: new Uri("https://foursquare.com/oauth2/authenticate"),
            redirectUrl: new Uri("http://www.int6.org"))
        {
            AllowCancel = false
        };

        this._authenticator.Completed += (sender, eventArgs) =>
        {
            if (eventArgs.IsAuthenticated) // auth. completed.
            {
                this.StoreAccount(eventArgs);

                var builder = new AlertDialog.Builder(this.OwnerContext);
                builder.SetMessage("auth all good!");
                builder.SetPositiveButton("Ok", (o, e) => { });
                builder.Create().Show();
                return;
            }
            else // The user cancelled.
            {
                var builder = new AlertDialog.Builder(this.OwnerContext);
                builder.SetMessage("User canncelled!");
                builder.SetPositiveButton("Ok", (o, e) => { });
                builder.Create().Show();
                return;
            }
        };

        // show the authenticator UI and start auth.
        var intent = this._authenticator.GetUI(this.OwnerContext);
        this.OwnerContext.StartActivity(intent);
    }

因此，如果用户通过了一次身份验证，它将将该帐户存储在设备上。

public FoursquareClient(Context context)
{
    Log.Verbose(Logging.AppTag, "Init foursquare client..");

    this.OwnerContext = context; // make sure we set the owner context before any.
    this.RetrieveAccount(); // try to retrieve any existing accounts.
}

每当他再次打开应用程序时，帐户就会被加载回来；

private void RetrieveAccount()
{
    if (this.IsAuthenticated)
    {
        Log.Debug(Logging.AppTag, "FourSquareClient is already authenticated! ");
        return;
    }

    var accounts = AccountStore.Create(this.OwnerContext).FindAccountsForService("Foursquare");
    var enumerable = accounts as IList<Account> ?? accounts.ToList();

    if (enumerable.Any())
    {
        Log.Info(Logging.AppTag, "Foursquareclient found account data.");
        this.IsAuthenticated = true;
        this.Account = enumerable.First();
    }
    else
    {
        Log.Info(Logging.AppTag, "Foursquareclient no account data found!");
        this.IsAuthenticated = false;
        this.Account = null;
    }
}

所以我想我对 auth 的东西都很满意，但不知何故无法提出请求；

public string MakeRequest()
{
    var @params = new Dictionary<string, string>
        {
            {"v", "20120321"},
            {"ll", "44.3,37.2"}
        };
    var request = new OAuth2Request("GET", new Uri("https://api.foursquare.com/v2/venues/explore"), @params,
                                    this.Account);

    request.GetResponseAsync().ContinueWith(t =>
        {
            if (t.IsFaulted)
                Console.WriteLine(t.Exception.Flatten()); 
            else
            {
                string json = t.Result.GetResponseText();
                Console.WriteLine(json);
            }
        });

    return string.Empty;
}

请求代码返回；出现一个或多个错误

10-02 14:54:31.403 I/mono-stdout（8641）：System.AggregateException： 发生一个或多个错误---> System.Net.WebException：远程服务器返回错误：（400）错误请求。 System.AggregateException：发生一个或多个错误---> System.Net.WebException：远程服务器返回错误：（400）错误请求。10-02 14:54:31.413 I/mono-stdout（8641）：在 System.Net.HttpWebRequest.CheckFinalStatus（System.Net.WebAsyncResult 结果）[0x00000] 在：0 在 System.Net.HttpWebRequest.CheckFinalStatus（系统。 Net.WebAsyncResult 结果）[0x00000] in :0 在 System.Net.HttpWebRequest.SetResponseData（System.Net.WebConnectionData 数据）[0x00000] in :0 10-02 14:54:31.413 I/mono-stdout（8641）：在 System.Net.HttpWebRequest.SetResponseData (System.Net.WebConnectionData data) [0x00000] in :0 10-02 14:54:31.413 I/mono-stdout(8641): --- 内部异常堆栈跟踪结束 -- - --- End of internal exception stack trace --- --> (Inner exception 0) System.Net.WebException: The remote server returned an error: (400) Bad Request。10-02 14:54:31.423 I/mono-stdout（8641）：->（内部异常 0）System.Net.WebException：远程服务器返回错误：(400) 错误请求。10-02 14:54:31.423 I/mono-stdout（8641）：在 System.Net.HttpWebRequest.CheckFinalStatus（System.Net.WebAsyncResult 结果）[0x00000] 在：0 在 System.Net.HttpWebRequest.CheckFinalStatus（系统。 Net.WebAsyncResult 结果）[0x00000] 在：0 10-02 14:54:31.423 I/mono-stdout（8641）：在 System.Net.HttpWebRequest.SetResponseData（System.Net.WebConnectionData 数据）[0x00000] 在：0在 System.Net.HttpWebRequest.SetResponseData（System.Net.WebConnectionData 数据）[0x00000] 中：0

关于我所缺少的任何想法？

4

2 回答 2

0

我已经改用 RestSharp 解决了这个问题；

        // https://developer.foursquare.com/docs/venues/explore
    public string GetVenues()
    {
        var @params = new Dictionary<string, string>
            {
                {"v", "20120321"},
                {"ll", "44.3,37.2"}
            };

        var response = this.Request("venues/explore", @params);

        return response;
    }

    private string Request(string endpoint, Dictionary<string, string> @params = null, HttpMethod httpMethod = HttpMethod.GET, bool userless = false)
    {
        var client = new RestClient("https://api.foursquare.com/v2/");            
        var request = new RestRequest(endpoint, Method.GET);

        if (!userless)
        {
            // About userless requests - https://developer.foursquare.com/overview/auth.html - Some of our endpoints that don’t pertain to 
            // specific user information, such as venues search are enabled for userless access (meaning you don’t need to have a user auth your 
            // app for access). To make a userless request, specify your consumer key's Client ID and Secret instead of an auth token in the request URL.

            request.AddParameter("oauth_token", this.Account.Properties["access_token"]);
        }

        if (@params != null)
        {
            foreach (var param in @params)
            {
                request.AddParameter(param.Key, param.Value);
            }
        }

        var response = client.Execute(request);
        var content = response.Content; // raw content as string

        return content;
    }
于 2013-10-11T13:12:11.157 回答
0

我刚刚使用了你的第一个代码，但是手动添加了“oauth_token”参数，它工作得很好:)

我的代码看起来像这样：

var @params = new Dictionary<string, string>
        {
            {"oauth_token", this.Account.Properties["access_token"]},
            {"v", "20120321"},
            {"ll", "44.3,37.2"}
        };
于 2014-06-05T16:08:05.830 回答