如何从C#调用Spotify API

前端之家收集整理的这篇文章主要介绍了如何从C#调用Spotify API前端之家小编觉得挺不错的,现在分享给大家,也给大家做个参考。
我试图用C#调用spotify API.
不幸的是,我已经陷入了获取访问令牌的困境

这就是我试图得到它的方式:

private static async Task<string> GetAccessToken()
        {
            SpotifyToken token = new SpotifyToken();

            string postString = string.Format("grant_type=client_credentials");
            byte[] byteArray = Encoding.UTF8.GetBytes(postString);

            string url = "https://accounts.spotify.com/api/token";

            WebRequest request = WebRequest.Create(url);
            request.Method = "POST";
            request.Headers.Add("Authorization","Basic {Encoded myClientIdXXX:myAppSecretYYY}");
            request.ContentType = "application/x-www-form-urlencoded";
            request.ContentLength = byteArray.Length;
            using (Stream dataStream = request.GetRequestStream())
            {
                dataStream.Write(byteArray,byteArray.Length);
                using (WebResponse response = await request.GetResponseAsync())
                {
                    using (Stream responseStream = response.GetResponseStream())
                    {
                        using (StreamReader reader = new StreamReader(responseStream))
                        {
                            string responseFromServer = reader.ReadToEnd();
                            token = JsonConvert.DeserializeObject<SpotifyToken>(responseFromServer);
                        }
                    }
                }
            }
            return token.access_token;
        }

但是我收到一个错误

Der Remoteserver hat einen Fehler zurückgegeben: (400) Ungültige Anforderung.

这意味着:

The remote server returned an error: (400) Bad Request.

我在这做错了什么?
我在spotify上注册了我的应用程序,并在请求标题中设置了clientId和secret …

提前致谢

解决方法

您是否真的需要从头开始编写自己的客户端来构建WebRequests等?为什么不使用像 SpotifyAPI-NET这样的现有客户端?

无论如何,你可以在GitHub上看到他们是如何做到的:

https://github.com/JohnnyCrazy/SpotifyAPI-NET/blob/master/SpotifyAPI/Web/Auth/AutorizationCodeAuth.cs

using Newtonsoft.Json;
using SpotifyAPI.Web.Enums;
using SpotifyAPI.Web.Models;
using System;
using System.Collections.Specialized;
using System.Diagnostics;
using System.IO;
using System.Net;
using System.Text;
using System.Threading;

namespace SpotifyAPI.Web.Auth
{
    public class AutorizationCodeAuth
    {
        public delegate void OnResponseReceived(AutorizationCodeAuthResponse response);

        private SimpleHttpServer _httpServer;
        private Thread _httpThread;
        public String ClientId { get; set; }
        public String RedirectUri { get; set; }
        public String State { get; set; }
        public Scope Scope { get; set; }
        public Boolean ShowDialog { get; set; }

        /// <summary>
        ///     Will be fired once the user authenticated
        /// </summary>
        public event OnResponseReceived OnResponseReceivedEvent;

        /// <summary>
        ///     Start the auth process (Make sure the internal HTTP-Server ist started)
        /// </summary>
        public void DoAuth()
        {
            String uri = GetUri();
            Process.Start(uri);
        }

        /// <summary>
        ///     Refreshes auth by providing the clientsecret (Don't use this if you're on a client)
        /// </summary>
        /// <param name="refreshToken">The refresh-token of the earlier gathered token</param>
        /// <param name="clientSecret">Your Client-Secret,don't provide it if this is running on a client!</param>
        public Token RefreshToken(string refreshToken,string clientSecret)
        {
            using (WebClient wc = new WebClient())
            {
                wc.Proxy = null;
                wc.Headers.Add("Authorization","Basic " + Convert.ToBase64String(Encoding.UTF8.GetBytes(ClientId + ":" + clientSecret)));
                NameValueCollection col = new NameValueCollection
                {
                    {"grant_type","refresh_token"},{"refresh_token",refreshToken}
                };

                String response;
                try
                {
                    byte[] data = wc.UploadValues("https://accounts.spotify.com/api/token","POST",col);
                    response = Encoding.UTF8.GetString(data);
                }
                catch (WebException e)
                {
                    using (StreamReader reader = new StreamReader(e.Response.GetResponseStream()))
                    {
                        response = reader.ReadToEnd();
                    }
                }
                return JsonConvert.DeserializeObject<Token>(response);
            }
        }

        private String GetUri()
        {
            StringBuilder builder = new StringBuilder("https://accounts.spotify.com/authorize/?");
            builder.Append("client_id=" + ClientId);
            builder.Append("&response_type=code");
            builder.Append("&redirect_uri=" + RedirectUri);
            builder.Append("&state=" + State);
            builder.Append("&scope=" + Scope.GetStringAttribute(" "));
            builder.Append("&show_dialog=" + ShowDialog);
            return builder.ToString();
        }

        /// <summary>
        ///     Start the internal HTTP-Server
        /// </summary>
        public void StartHttpServer(int port = 80)
        {
            _httpServer = new SimpleHttpServer(port,AuthType.Authorization);
            _httpServer.OnAuth += HttpServerOnOnAuth;

            _httpThread = new Thread(_httpServer.Listen);
            _httpThread.Start();
        }

        private void HttpServerOnOnAuth(AuthEventArgs e)
        {
            OnResponseReceivedEvent?.Invoke(new AutorizationCodeAuthResponse()
            {
                Code = e.Code,State = e.State,Error = e.Error
            });
        }

        /// <summary>
        ///     This will stop the internal HTTP-Server (Should be called after you got the Token)
        /// </summary>
        public void StopHttpServer()
        {
            _httpServer = null;
        }

        /// <summary>
        ///     Exchange a code for a Token (Don't use this if you're on a client)
        /// </summary>
        /// <param name="code">The gathered code from the response</param>
        /// <param name="clientSecret">Your Client-Secret,don't provide it if this is running on a client!</param>
        /// <returns></returns>
        public Token ExchangeAuthCode(String code,String clientSecret)
        {
            using (WebClient wc = new WebClient())
            {
                wc.Proxy = null;

                NameValueCollection col = new NameValueCollection
                {
                    {"grant_type","authorization_code"},{"code",code},{"redirect_uri",RedirectUri},{"client_id",ClientId},{"client_secret",clientSecret}
                };

                String response;
                try
                {
                    byte[] data = wc.UploadValues("https://accounts.spotify.com/api/token",col);
                    response = Encoding.UTF8.GetString(data);
                }
                catch (WebException e)
                {
                    using (StreamReader reader = new StreamReader(e.Response.GetResponseStream()))
                    {
                        response = reader.ReadToEnd();
                    }
                }
                return JsonConvert.DeserializeObject<Token>(response);
            }
        }
    }

    public struct AutorizationCodeAuthResponse
    {
        public String Code { get; set; }
        public String State { get; set; }
        public String Error { get; set; }
    }
}
原文链接:https://www.f2er.com/csharp/244911.html

猜你在找的C#相关文章