Fixed: DownloadStation api client for DSM 5.x.

src/NzbDrone.Core.Test/Download/DownloadClientTests/DownloadStationTests/TorrentDownloadStationFixture.cs

@@ -275,7 +275,7 @@ public void Setup()
                 { "default_destination", _defaultDestination },
             };
 
-            Mocker.GetMock<IDownloadStationProxy>()
+            Mocker.GetMock<IDownloadStationInfoProxy>()
               .Setup(v => v.GetConfig(It.IsAny<DownloadStationSettings>()))
               .Returns(_downloadStationConfigItems);
         }
@@ -311,7 +311,7 @@ protected virtual void GivenTasks(List<DownloadStationTask> torrents)
                 torrents = new List<DownloadStationTask>();
             }
 
-            Mocker.GetMock<IDownloadStationProxy>()
+            Mocker.GetMock<IDownloadStationTaskProxy>()
                   .Setup(s => s.GetTasks(It.IsAny<DownloadStationSettings>()))
                   .Returns(torrents);
         }
@@ -330,11 +330,11 @@ protected void GivenSuccessfulDownload()
                   .Setup(s => s.Get(It.IsAny<HttpRequest>()))
                   .Returns<HttpRequest>(r => new HttpResponse(r, new HttpHeader(), new byte[1000]));
 
-            Mocker.GetMock<IDownloadStationProxy>()
+            Mocker.GetMock<IDownloadStationTaskProxy>()
                   .Setup(s => s.AddTaskFromUrl(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<DownloadStationSettings>()))
                   .Callback(PrepareClientToReturnQueuedItem);
 
-            Mocker.GetMock<IDownloadStationProxy>()
+            Mocker.GetMock<IDownloadStationTaskProxy>()
                   .Setup(s => s.AddTaskFromData(It.IsAny<byte[]>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<DownloadStationSettings>()))
                   .Callback(PrepareClientToReturnQueuedItem);
         }
@@ -352,7 +352,7 @@ protected int GivenAllKindOfTasks()
         {
             var tasks = new List<DownloadStationTask>() { _queued, _completed, _failed, _downloading, _seeding };
 
-            Mocker.GetMock<IDownloadStationProxy>()
+            Mocker.GetMock<IDownloadStationTaskProxy>()
                   .Setup(d => d.GetTasks(_settings))
                   .Returns(tasks);
 
@@ -372,7 +372,7 @@ public void Download_with_TvDirectory_should_force_directory()
 
             id.Should().NotBeNullOrEmpty();
 
-            Mocker.GetMock<IDownloadStationProxy>()
+            Mocker.GetMock<IDownloadStationTaskProxy>()
                   .Verify(v => v.AddTaskFromUrl(It.IsAny<string>(), _tvDirectory, It.IsAny<DownloadStationSettings>()), Times.Once());
         }
 
@@ -389,7 +389,7 @@ public void Download_with_category_should_force_directory()
 
             id.Should().NotBeNullOrEmpty();
 
-            Mocker.GetMock<IDownloadStationProxy>()
+            Mocker.GetMock<IDownloadStationTaskProxy>()
                   .Verify(v => v.AddTaskFromUrl(It.IsAny<string>(), $"{_defaultDestination}/{_category}", It.IsAny<DownloadStationSettings>()), Times.Once());
         }
 
@@ -405,7 +405,7 @@ public void Download_without_TvDirectory_and_Category_should_use_default()
 
             id.Should().NotBeNullOrEmpty();
 
-            Mocker.GetMock<IDownloadStationProxy>()
+            Mocker.GetMock<IDownloadStationTaskProxy>()
                   .Verify(v => v.AddTaskFromUrl(It.IsAny<string>(), null, It.IsAny<DownloadStationSettings>()), Times.Once());
         }
 
@@ -482,7 +482,7 @@ public void Download_should_throw_and_not_add_task_if_cannot_get_serial_number()
 
             Assert.Throws(Is.InstanceOf<Exception>(), () => Subject.Download(remoteEpisode));
 
-            Mocker.GetMock<IDownloadStationProxy>()
+            Mocker.GetMock<IDownloadStationTaskProxy>()
                   .Verify(v => v.AddTaskFromUrl(It.IsAny<string>(), null, _settings), Times.Never());
         }
 

src/NzbDrone.Core.Test/Download/DownloadClientTests/DownloadStationTests/UsenetDownloadStationFixture.cs

@@ -177,7 +177,7 @@ public void Setup()
                 { "default_destination", _defaultDestination },
             };
 
-            Mocker.GetMock<IDownloadStationProxy>()
+            Mocker.GetMock<IDownloadStationInfoProxy>()
               .Setup(v => v.GetConfig(It.IsAny<DownloadStationSettings>()))
               .Returns(_downloadStationConfigItems);
         }
@@ -213,7 +213,7 @@ protected virtual void GivenTasks(List<DownloadStationTask> nzbs)
                 nzbs = new List<DownloadStationTask>();
             }
 
-            Mocker.GetMock<IDownloadStationProxy>()
+            Mocker.GetMock<IDownloadStationTaskProxy>()
                   .Setup(s => s.GetTasks(It.IsAny<DownloadStationSettings>()))
                   .Returns(nzbs);
         }
@@ -233,7 +233,7 @@ protected void GivenSuccessfulDownload()
                   .Returns<HttpRequest>(r => new HttpResponse(r, new HttpHeader(), new byte[1000]));
             */
 
-            Mocker.GetMock<IDownloadStationProxy>()
+            Mocker.GetMock<IDownloadStationTaskProxy>()
                   .Setup(s => s.AddTaskFromData(It.IsAny<byte[]>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<DownloadStationSettings>()))
                   .Callback(PrepareClientToReturnQueuedItem);
         }
@@ -242,7 +242,7 @@ protected void GivenAllKindOfTasks()
         {
             var tasks = new List<DownloadStationTask>() { _queued, _completed, _failed, _downloading, _seeding };
 
-            Mocker.GetMock<IDownloadStationProxy>()
+            Mocker.GetMock<IDownloadStationTaskProxy>()
                   .Setup(d => d.GetTasks(_settings))
                   .Returns(tasks);
         }
@@ -260,7 +260,7 @@ public void Download_with_TvDirectory_should_force_directory()
 
             id.Should().NotBeNullOrEmpty();
 
-            Mocker.GetMock<IDownloadStationProxy>()
+            Mocker.GetMock<IDownloadStationTaskProxy>()
                   .Verify(v => v.AddTaskFromData(It.IsAny<byte[]>(), It.IsAny<string>(), _tvDirectory, It.IsAny<DownloadStationSettings>()), Times.Once());
         }
 
@@ -277,7 +277,7 @@ public void Download_with_category_should_force_directory()
 
             id.Should().NotBeNullOrEmpty();
 
-            Mocker.GetMock<IDownloadStationProxy>()
+            Mocker.GetMock<IDownloadStationTaskProxy>()
                   .Verify(v => v.AddTaskFromData(It.IsAny<byte[]>(), It.IsAny<string>(), $"{_defaultDestination}/{_category}", It.IsAny<DownloadStationSettings>()), Times.Once());
         }
 
@@ -293,7 +293,7 @@ public void Download_without_TvDirectory_and_Category_should_use_default()
 
             id.Should().NotBeNullOrEmpty();
 
-            Mocker.GetMock<IDownloadStationProxy>()
+            Mocker.GetMock<IDownloadStationTaskProxy>()
                   .Verify(v => v.AddTaskFromData(It.IsAny<byte[]>(), It.IsAny<string>(), null, It.IsAny<DownloadStationSettings>()), Times.Once());
         }
 
@@ -370,7 +370,7 @@ public void Download_should_throw_and_not_add_task_if_cannot_get_serial_number()
 
             Assert.Throws(Is.InstanceOf<Exception>(), () => Subject.Download(remoteEpisode));
 
-            Mocker.GetMock<IDownloadStationProxy>()
+            Mocker.GetMock<IDownloadStationTaskProxy>()
                   .Verify(v => v.AddTaskFromUrl(It.IsAny<string>(), null, _settings), Times.Never());
         }
 

src/NzbDrone.Core/Download/Clients/DownloadStation/DiskStationApiInfo.cs

@@ -1,13 +1,19 @@
 namespace NzbDrone.Core.Download.Clients.DownloadStation
 {
     public class DiskStationApiInfo
-    {
+    {        
         private string _path;
 
         public int MaxVersion { get; set; }
 
         public int MinVersion { get; set; }
 
+        public DiskStationApi Type { get; set; }
+
+        public string Name { get; set; }
+
+        public bool NeedsAuthentication { get; set; }
+
         public string Path
         {
             get { return _path; }

src/NzbDrone.Core/Download/Clients/DownloadStation/Proxies/DSMInfoProxy.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using NLog;
+using NzbDrone.Common.Cache;
 using NzbDrone.Common.Http;
 using NzbDrone.Core.Download.Clients.DownloadStation.Responses;
 
@@ -13,20 +14,19 @@ public interface IDSMInfoProxy
 
     public class DSMInfoProxy : DiskStationProxyBase, IDSMInfoProxy
     {
-        public DSMInfoProxy(IHttpClient httpClient, Logger logger) :
+        public DSMInfoProxy(IHttpClient httpClient, ICacheManager cacheManager, Logger logger) :
-            base(httpClient, logger)
+            base(DiskStationApi.DSMInfo, "SYNO.DSM.Info", httpClient, cacheManager, logger)
         {
         }
 
         public string GetSerialNumber(DownloadStationSettings settings)
         {
-            var arguments = new Dictionary<string, object>() {
+            var info = GetApiInfo(settings);
-                { "api", "SYNO.DSM.Info" },
+
-                { "version", "2" },
+            var requestBuilder = BuildRequest(settings, "getinfo", info.MinVersion);
-                { "method", "getinfo" }
+
-            };
+            var response = ProcessRequest<DSMInfoResponse>(requestBuilder, "get serial number", settings);
 
-            var response = ProcessRequest<DSMInfoResponse>(DiskStationApi.DSMInfo, arguments, settings, "get serial number");
             return response.Data.SerialNumber;
         }
     }

src/NzbDrone.Core/Download/Clients/DownloadStation/Proxies/DiskStationProxyBase.cs

@@ -1,63 +1,77 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using System.Linq;
 using System.Net;
 using NLog;
+using NzbDrone.Common.Cache;
 using NzbDrone.Common.Http;
 using NzbDrone.Common.Serializer;
 using NzbDrone.Core.Download.Clients.DownloadStation.Responses;
 
 namespace NzbDrone.Core.Download.Clients.DownloadStation.Proxies
 {
-    public abstract class DiskStationProxyBase
+    public interface IDiskStationProxy
     {
-        private static readonly Dictionary<DiskStationApi, string> Resources;
+        DiskStationApiInfo GetApiInfo(DownloadStationSettings settings);
+    }
+
+    public abstract class DiskStationProxyBase : IDiskStationProxy
+    {
+        protected readonly Logger _logger;
 
         private readonly IHttpClient _httpClient;
-        protected readonly Logger _logger;
+        private readonly ICached<DiskStationApiInfo> _infoCache;
-        private bool _authenticated;
+        private readonly ICached<string> _sessionCache;
+        private readonly DiskStationApi _apiType;
+        private readonly string _apiName;
+
+        private static readonly DiskStationApiInfo _apiInfo;
 
         static DiskStationProxyBase()
         {
-            Resources = new Dictionary<DiskStationApi, string>
+            _apiInfo = new DiskStationApiInfo()
             {
-                { DiskStationApi.Info, "query.cgi" }
+                Type = DiskStationApi.Info,
+                Name = "SYNO.API.Info",
+                Path = "query.cgi",
+                MaxVersion = 1,
+                MinVersion = 1,
+                NeedsAuthentication = false
             };
         }
 
-        public DiskStationProxyBase(IHttpClient httpClient, Logger logger)
+        public DiskStationProxyBase(DiskStationApi apiType,
+                                    string apiName,
+                                    IHttpClient httpClient,
+                                    ICacheManager cacheManager,
+                                    Logger logger)
         {
             _httpClient = httpClient;
             _logger = logger;
+            _infoCache = cacheManager.GetCache<DiskStationApiInfo>(typeof(DiskStationProxyBase), "apiInfo");
+            _sessionCache = cacheManager.GetCache<string>(typeof(DiskStationProxyBase), "sessions");
+            _apiType = apiType;
+            _apiName = apiName;
         }
 
-
+        private string GenerateSessionCacheKey(DownloadStationSettings settings)
-        protected DiskStationResponse<object> ProcessRequest(DiskStationApi api,
-                                                                 Dictionary<string, object> arguments,
-                                                                 DownloadStationSettings settings,
-                                                                 string operation,
-                                                                 HttpMethod method = HttpMethod.GET)
         {
-            return ProcessRequest<object>(api, arguments, settings, operation, method);
+            return $"{settings.Username}@{settings.Host}:{settings.Port}";
         }
 
-        protected DiskStationResponse<T> ProcessRequest<T>(DiskStationApi api,
+        protected DiskStationResponse<T> ProcessRequest<T>(HttpRequestBuilder requestBuilder,
-                                                               Dictionary<string, object> arguments,
+                                                         string operation,
-                                                               DownloadStationSettings settings,
+                                                         DownloadStationSettings settings) where T : new()
-                                                               string operation,
-                                                               HttpMethod method = HttpMethod.GET,
-                                                               int retries = 0) where T : new()
         {
-            if (retries == 5)
+            return ProcessRequest<T>(requestBuilder, operation, _apiType, settings);
-            {
+        }
-                throw new DownloadClientException("Try to process request to {0} with {1} more than 5 times", api, arguments.ToJson().ToString());
-            }
 
-            if (!_authenticated && api != DiskStationApi.Info && api != DiskStationApi.DSMInfo)
+        private DiskStationResponse<T> ProcessRequest<T>(HttpRequestBuilder requestBuilder,
-            {
+                                                         string operation,
-                AuthenticateClient(settings);
+                                                         DiskStationApi api,
-            }
+                                                         DownloadStationSettings settings) where T : new()
-
+        {
-            var request = BuildRequest(settings, api, arguments, method);
+            var request = requestBuilder.Build();
             var response = _httpClient.Execute(request);
 
             _logger.Debug("Trying to {0}", operation);
@@ -77,16 +91,14 @@ protected DiskStationResponse<T> ProcessRequest<T>(DiskStationApi api,
 
                     if (responseContent.Error.SessionError)
                     {
-                        _authenticated = false;
+                        _sessionCache.Remove(GenerateSessionCacheKey(settings));
 
                         if (responseContent.Error.Code == 105)
                         {
                             throw new DownloadClientAuthenticationException(msg);
                         }
-
-                        return ProcessRequest<T>(api, arguments, settings, operation, method, ++retries);
                     }
-                                     
+
                     throw new DownloadClientException(msg);
                 }
             }
@@ -96,124 +108,126 @@ protected DiskStationResponse<T> ProcessRequest<T>(DiskStationApi api,
             }
         }
 
-        private void AuthenticateClient(DownloadStationSettings settings)
+        private string AuthenticateClient(DownloadStationSettings settings)
         {
-            var arguments = new Dictionary<string, object>
+            var authInfo = GetApiInfo(DiskStationApi.Auth, settings);
-            {
-                 { "api", "SYNO.API.Auth" },
-                 { "version", "1" },
-                 { "method", "login" },
-                 { "account", settings.Username },
-                 { "passwd", settings.Password },
-                 { "format", "cookie" },
-                 { "session", "DownloadStation" },
-             };
 
-            var authLoginRequest = BuildRequest(settings, DiskStationApi.Auth, arguments, HttpMethod.GET);
+            var requestBuilder = BuildRequest(settings, authInfo, "login", 2);
-            authLoginRequest.StoreResponseCookie = true;
+            requestBuilder.AddQueryParam("account", settings.Username);
+            requestBuilder.AddQueryParam("passwd", settings.Password);
+            requestBuilder.AddQueryParam("format", "sid");
+            requestBuilder.AddQueryParam("session", Guid.NewGuid().ToString());
 
-            var response = _httpClient.Execute(authLoginRequest);
+            var authResponse = ProcessRequest<DiskStationAuthResponse>(requestBuilder, "login", DiskStationApi.Auth, settings);
 
-            var downloadStationResponse = Json.Deserialize<DiskStationResponse<DiskStationAuthResponse>>(response.Content);
+            return authResponse.Data.SId;
-
-            var authResponse = Json.Deserialize<DiskStationResponse<DiskStationAuthResponse>>(response.Content);
-
-            _authenticated = authResponse.Success;
-
-            if (!_authenticated)
-            {
-                throw new DownloadClientAuthenticationException(downloadStationResponse.Error.GetMessage(DiskStationApi.Auth));
-            }
         }
 
-        private HttpRequest BuildRequest(DownloadStationSettings settings, DiskStationApi api, Dictionary<string, object> arguments, HttpMethod method)
+        protected HttpRequestBuilder BuildRequest(DownloadStationSettings settings, string methodName, int apiVersion, HttpMethod httpVerb = HttpMethod.GET)
         {
-            if (!Resources.ContainsKey(api))
+            var info = GetApiInfo(_apiType, settings);
-            {
-                GetApiVersion(settings, api);
-            }
 
-            var requestBuilder = new HttpRequestBuilder(settings.UseSsl, settings.Host, settings.Port).Resource($"webapi/{Resources[api]}");
+            return BuildRequest(settings, info, methodName, apiVersion, httpVerb);
-            requestBuilder.Method = method;
+        }
+
+        private HttpRequestBuilder BuildRequest(DownloadStationSettings settings, DiskStationApiInfo apiInfo, string methodName, int apiVersion, HttpMethod httpVerb = HttpMethod.GET)
+        {
+            var requestBuilder = new HttpRequestBuilder(settings.UseSsl, settings.Host, settings.Port).Resource($"webapi/{apiInfo.Path}");
+            requestBuilder.Method = httpVerb;
             requestBuilder.LogResponseContent = true;
             requestBuilder.SuppressHttpError = true;
             requestBuilder.AllowAutoRedirect = false;
+            requestBuilder.Headers.ContentType = "application/json";
 
-            if (requestBuilder.Method == HttpMethod.POST)
+            if (apiVersion < apiInfo.MinVersion || apiVersion > apiInfo.MaxVersion)
             {
-                if (api == DiskStationApi.DownloadStationTask && arguments.ContainsKey("file"))
+                throw new ArgumentOutOfRangeException(nameof(apiVersion));
-                {
+            }
-                    requestBuilder.Headers.ContentType = "multipart/form-data";
 
-                    foreach (var arg in arguments)
+            if (httpVerb == HttpMethod.POST)
-                    {
+            {
-                        if (arg.Key == "file")
+                if (apiInfo.NeedsAuthentication)
-                        {
-                            Dictionary<string, object> file = (Dictionary<string, object>)arg.Value;
-                            requestBuilder.AddFormUpload(arg.Key, file["name"].ToString(), (byte[])file["data"]);
-                        }
-                        else
-                        {
-                            requestBuilder.AddFormParameter(arg.Key, arg.Value);
-                        }
-                    }
-                }
-                else
                 {
-                    requestBuilder.Headers.ContentType = "application/json";
+                    requestBuilder.AddFormParameter("_sid", _sessionCache.Get(GenerateSessionCacheKey(settings), () => AuthenticateClient(settings), TimeSpan.FromHours(6)));
                 }
+
+                requestBuilder.AddFormParameter("api", apiInfo.Name);
+                requestBuilder.AddFormParameter("version", apiVersion);
+                requestBuilder.AddFormParameter("method", methodName);
             }
             else
             {
-                foreach (var arg in arguments)
+                if (apiInfo.NeedsAuthentication)
                 {
-                    requestBuilder.AddQueryParam(arg.Key, arg.Value);
+                    requestBuilder.AddQueryParam("_sid", _sessionCache.Get(GenerateSessionCacheKey(settings), () => AuthenticateClient(settings), TimeSpan.FromHours(6)));
+                }
+
+                requestBuilder.AddQueryParam("api", apiInfo.Name);
+                requestBuilder.AddQueryParam("version", apiVersion);
+                requestBuilder.AddQueryParam("method", methodName);
+            }
+
+            return requestBuilder;
+        }
+
+        private string GenerateInfoCacheKey(DownloadStationSettings settings, DiskStationApi api)
+        {
+            return $"{settings.Host}:{settings.Port}->{api}";
+        }
+
+        private void UpdateApiInfo(DownloadStationSettings settings)
+        {
+            var apis = new Dictionary<string, DiskStationApi>()
+            {
+                { "SYNO.API.Auth", DiskStationApi.Auth },
+                { _apiName, _apiType }
+            };
+
+            var requestBuilder = BuildRequest(settings, _apiInfo, "query", _apiInfo.MinVersion);
+            requestBuilder.AddQueryParam("query", string.Join(",", apis.Keys));
+
+            var infoResponse = ProcessRequest<DiskStationApiInfoResponse>(requestBuilder, "get api info", _apiInfo.Type, settings);
+
+            foreach (var data in infoResponse.Data)
+            {
+                if (apis.ContainsKey(data.Key))
+                {
+                    data.Value.Name = data.Key;
+                    data.Value.Type = apis[data.Key];
+                    data.Value.NeedsAuthentication = apis[data.Key] != DiskStationApi.Auth;
+
+                    _infoCache.Set(GenerateInfoCacheKey(settings, apis[data.Key]), data.Value, TimeSpan.FromHours(1));
+                }
+            }
+        }
+
+        private DiskStationApiInfo GetApiInfo(DiskStationApi api, DownloadStationSettings settings)
+        {
+            if (api == DiskStationApi.Info)
+            {
+                return _apiInfo;
+            }
+
+            var key = GenerateInfoCacheKey(settings, api);
+            var info = _infoCache.Find(key);
+
+            if (info == null)
+            {
+                UpdateApiInfo(settings);
+                info = _infoCache.Find(key);
+
+                if (info == null)
+                {
+                    throw new DownloadClientException("Info of {0} not found on {1}:{2}", api, settings.Host, settings.Port);
                 }
             }
 
-            return requestBuilder.Build();
+            return info;
         }
 
-        protected IEnumerable<int> GetApiVersion(DownloadStationSettings settings, DiskStationApi api)
+        public DiskStationApiInfo GetApiInfo(DownloadStationSettings settings)
         {
-            var arguments = new Dictionary<string, object>
+            return GetApiInfo(_apiType, settings);
-            {
-                 { "api", "SYNO.API.Info" },
-                 { "version", "1" },
-                 { "method", "query" },
-                 { "query", "SYNO.API.Auth, SYNO.DownloadStation.Info, SYNO.DownloadStation.Task, SYNO.FileStation.List, SYNO.DSM.Info" },
-             };
-
-            var infoResponse = ProcessRequest<DiskStationApiInfoResponse>(DiskStationApi.Info, arguments, settings, "Get api version");
-
-            //TODO: Refactor this into more elegant code
-            var infoResponeDSAuth = infoResponse.Data["SYNO.API.Auth"];
-            var infoResponeDSInfo = infoResponse.Data["SYNO.DownloadStation.Info"];
-            var infoResponeDSTask = infoResponse.Data["SYNO.DownloadStation.Task"];
-            var infoResponseFSList = infoResponse.Data["SYNO.FileStation.List"];
-            var infoResponseDSMInfo = infoResponse.Data["SYNO.DSM.Info"];
-
-            Resources[DiskStationApi.Auth] = infoResponeDSAuth.Path;
-            Resources[DiskStationApi.DownloadStationInfo] = infoResponeDSInfo.Path;
-            Resources[DiskStationApi.DownloadStationTask] = infoResponeDSTask.Path;
-            Resources[DiskStationApi.FileStationList] = infoResponseFSList.Path;
-            Resources[DiskStationApi.DSMInfo] = infoResponseDSMInfo.Path;
-
-            switch (api)
-            {
-                case DiskStationApi.Auth:
-                    return Enumerable.Range(infoResponeDSAuth.MinVersion, infoResponeDSAuth.MaxVersion - infoResponeDSAuth.MinVersion + 1);
-                case DiskStationApi.DownloadStationInfo:
-                    return Enumerable.Range(infoResponeDSInfo.MinVersion, infoResponeDSInfo.MaxVersion - infoResponeDSInfo.MinVersion + 1);
-                case DiskStationApi.DownloadStationTask:
-                    return Enumerable.Range(infoResponeDSTask.MinVersion, infoResponeDSTask.MaxVersion - infoResponeDSTask.MinVersion + 1);
-                case DiskStationApi.FileStationList:
-                    return Enumerable.Range(infoResponseFSList.MinVersion, infoResponseFSList.MaxVersion - infoResponseFSList.MinVersion + 1);
-                case DiskStationApi.DSMInfo:
-                    return Enumerable.Range(infoResponseDSMInfo.MinVersion, infoResponseDSMInfo.MaxVersion - infoResponseDSMInfo.MinVersion + 1);
-                default:
-                    throw new DownloadClientException("Api not implemented");
-            }
         }
     }
 }

src/NzbDrone.Core/Download/Clients/DownloadStation/Proxies/DownloadStationInfoProxy.cs

@@ -0,0 +1,29 @@
+using NLog;
+using NzbDrone.Common.Http;
+using System.Collections.Generic;
+using NzbDrone.Common.Cache;
+
+namespace NzbDrone.Core.Download.Clients.DownloadStation.Proxies
+{
+    public interface IDownloadStationInfoProxy : IDiskStationProxy
+    {
+        Dictionary<string, object> GetConfig(DownloadStationSettings settings);
+    }
+
+    public class DownloadStationInfoProxy : DiskStationProxyBase, IDownloadStationInfoProxy
+    {
+        public DownloadStationInfoProxy(IHttpClient httpClient, ICacheManager cacheManager, Logger logger) :
+            base(DiskStationApi.DownloadStationInfo, "SYNO.DownloadStation.Info", httpClient, cacheManager, logger)
+        {
+        }
+
+        public Dictionary<string, object> GetConfig(DownloadStationSettings settings)
+        {
+            var requestBuilder = BuildRequest(settings, "getConfig", 1);
+
+            var response = ProcessRequest<Dictionary<string, object>>(requestBuilder, "get config", settings);
+
+            return response.Data;
+        }
+    }
+}

src/NzbDrone.Core/Download/Clients/DownloadStation/Proxies/DownloadStationProxy.cs

@@ -1,121 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using NLog;
-using NzbDrone.Common.Extensions;
-using NzbDrone.Common.Http;
-using NzbDrone.Core.Download.Clients.DownloadStation.Responses;
-
-namespace NzbDrone.Core.Download.Clients.DownloadStation.Proxies
-{
-    public interface IDownloadStationProxy
-    {
-        IEnumerable<DownloadStationTask> GetTasks(DownloadStationSettings settings);
-        Dictionary<string, object> GetConfig(DownloadStationSettings settings);
-        void RemoveTask(string downloadId, DownloadStationSettings settings);
-        void AddTaskFromUrl(string url, string downloadDirectory, DownloadStationSettings settings);
-        void AddTaskFromData(byte[] data, string filename, string downloadDirectory, DownloadStationSettings settings);
-        IEnumerable<int> GetApiVersion(DownloadStationSettings settings);
-    }
-
-    public class DownloadStationProxy : DiskStationProxyBase, IDownloadStationProxy
-    {
-        public DownloadStationProxy(IHttpClient httpClient, Logger logger)
-            : base(httpClient, logger)
-        {
-        }
-
-        public void AddTaskFromData(byte[] data, string filename, string downloadDirectory, DownloadStationSettings settings)
-        {
-            var arguments = new Dictionary<string, object>
-            {
-                { "api", "SYNO.DownloadStation.Task" },
-                { "version", "2" },
-                { "method", "create" }
-            };
-
-            if (downloadDirectory.IsNotNullOrWhiteSpace())
-            {
-                arguments.Add("destination", downloadDirectory);
-            }
-
-            arguments.Add("file", new Dictionary<string, object>() { { "name", filename }, { "data", data } });
-
-            var response = ProcessRequest(DiskStationApi.DownloadStationTask, arguments, settings, $"add task from data {filename}", HttpMethod.POST);
-        }
-
-        public void AddTaskFromUrl(string url, string downloadDirectory, DownloadStationSettings settings)
-        {
-            var arguments = new Dictionary<string, object>
-            {
-                { "api", "SYNO.DownloadStation.Task" },
-                { "version", "3" },
-                { "method", "create" },
-                { "uri", url }
-            };
-
-            if (downloadDirectory.IsNotNullOrWhiteSpace())
-            {
-                arguments.Add("destination", downloadDirectory);
-            }
-
-            var response = ProcessRequest(DiskStationApi.DownloadStationTask, arguments, settings, $"add task from url {url}");
-        }
-
-        public IEnumerable<DownloadStationTask> GetTasks(DownloadStationSettings settings)
-        {
-            var arguments = new Dictionary<string, object>
-            {
-                 { "api", "SYNO.DownloadStation.Task" },
-                 { "version", "1" },
-                 { "method", "list" },
-                 { "additional", "detail,transfer" }
-            };
-
-            try
-            {
-                var response = ProcessRequest<DownloadStationTaskInfoResponse>(DiskStationApi.DownloadStationTask, arguments, settings, "get tasks");
-
-                return response.Data.Tasks;
-            }
-            catch (DownloadClientException e)
-            {
-                _logger.Error(e);
-                return new List<DownloadStationTask>();
-            }
-        }
-
-        public Dictionary<string, object> GetConfig(DownloadStationSettings settings)
-        {
-            var arguments = new Dictionary<string, object>
-            {
-                { "api", "SYNO.DownloadStation.Info" },
-                { "version", "1" },
-                { "method", "getconfig" }
-            };
-
-            var response = ProcessRequest<Dictionary<string, object>>(DiskStationApi.DownloadStationInfo, arguments, settings, "get config");
-
-            return response.Data;
-        }
-
-        public void RemoveTask(string downloadId, DownloadStationSettings settings)
-        {
-            var arguments = new Dictionary<string, object>
-            {
-                { "api", "SYNO.DownloadStation.Task" },
-                { "version", "1" },
-                { "method", "delete" },
-                { "id", downloadId },
-                { "force_complete", false }
-            };
-
-            var response = ProcessRequest(DiskStationApi.DownloadStationTask, arguments, settings, $"remove item {downloadId}");
-        }
-
-        public IEnumerable<int> GetApiVersion(DownloadStationSettings settings)
-        {
-            return base.GetApiVersion(settings, DiskStationApi.DownloadStationInfo);
-        }
-    }
-}

src/NzbDrone.Core/Download/Clients/DownloadStation/Proxies/DownloadStationTaskProxy.cs

@@ -0,0 +1,79 @@
+using System.Collections.Generic;
+using NLog;
+using NzbDrone.Common.Cache;
+using NzbDrone.Common.Extensions;
+using NzbDrone.Common.Http;
+using NzbDrone.Core.Download.Clients.DownloadStation.Responses;
+
+namespace NzbDrone.Core.Download.Clients.DownloadStation.Proxies
+{
+    public interface IDownloadStationTaskProxy : IDiskStationProxy
+    {
+        IEnumerable<DownloadStationTask> GetTasks(DownloadStationSettings settings);
+        void RemoveTask(string downloadId, DownloadStationSettings settings);
+        void AddTaskFromUrl(string url, string downloadDirectory, DownloadStationSettings settings);
+        void AddTaskFromData(byte[] data, string filename, string downloadDirectory, DownloadStationSettings settings);
+    }
+
+    public class DownloadStationTaskProxy : DiskStationProxyBase, IDownloadStationTaskProxy
+    {
+        public DownloadStationTaskProxy(IHttpClient httpClient, ICacheManager cacheManager, Logger logger)
+            : base(DiskStationApi.DownloadStationTask, "SYNO.DownloadStation.Task", httpClient, cacheManager, logger)
+        {
+        }
+
+        public void AddTaskFromData(byte[] data, string filename, string downloadDirectory, DownloadStationSettings settings)
+        {
+            var requestBuilder = BuildRequest(settings, "create", 2, HttpMethod.POST);
+
+            if (downloadDirectory.IsNotNullOrWhiteSpace())
+            {
+                requestBuilder.AddFormParameter("destination", downloadDirectory);
+            }
+
+            requestBuilder.AddFormUpload("file", filename, data);
+
+            var response = ProcessRequest<object>(requestBuilder, $"add task from data {filename}", settings);
+        }
+
+        public void AddTaskFromUrl(string url, string downloadDirectory, DownloadStationSettings settings)
+        {
+            var requestBuilder = BuildRequest(settings, "create", 3);
+            requestBuilder.AddQueryParam("uri", url);
+
+            if (downloadDirectory.IsNotNullOrWhiteSpace())
+            {
+                requestBuilder.AddQueryParam("destination", downloadDirectory);
+            }
+
+            var response = ProcessRequest<object>(requestBuilder, $"add task from url {url}", settings);
+        }
+
+        public IEnumerable<DownloadStationTask> GetTasks(DownloadStationSettings settings)
+        {
+            try
+            {
+                var requestBuilder = BuildRequest(settings, "list", 1);
+                requestBuilder.AddQueryParam("additional", "detail,transfer");
+
+                var response = ProcessRequest<DownloadStationTaskInfoResponse>(requestBuilder, "get tasks", settings);
+
+                return response.Data.Tasks;
+            }
+            catch (DownloadClientException e)
+            {
+                _logger.Error(e);
+                return new List<DownloadStationTask>();
+            }
+        }
+
+        public void RemoveTask(string downloadId, DownloadStationSettings settings)
+        {
+            var requestBuilder = BuildRequest(settings, "delete", 1);
+            requestBuilder.AddQueryParam("id", downloadId);
+            requestBuilder.AddQueryParam("force_complete", false);
+
+            var response = ProcessRequest<object>(requestBuilder, $"remove item {downloadId}", settings);
+        }
+    }
+}

src/NzbDrone.Core/Download/Clients/DownloadStation/Proxies/FileStationProxy.cs

@@ -2,31 +2,27 @@
 using System.Collections.Generic;
 using System.Linq;
 using NLog;
+using NzbDrone.Common.Cache;
 using NzbDrone.Common.Http;
 using NzbDrone.Common.Serializer;
 using NzbDrone.Core.Download.Clients.DownloadStation.Responses;
 
 namespace NzbDrone.Core.Download.Clients.DownloadStation.Proxies
 {
-    public interface IFileStationProxy
+    public interface IFileStationProxy : IDiskStationProxy
     {
         SharedFolderMapping GetSharedFolderMapping(string sharedFolder, DownloadStationSettings settings);
-        IEnumerable<int> GetApiVersion(DownloadStationSettings settings);
+
         FileStationListFileInfoResponse GetInfoFileOrDirectory(string path, DownloadStationSettings settings);
     }
 
     public class FileStationProxy : DiskStationProxyBase, IFileStationProxy
     {
-        public FileStationProxy(IHttpClient httpClient, Logger logger)
+        public FileStationProxy(IHttpClient httpClient, ICacheManager cacheManager, Logger logger)
-            : base(httpClient, logger)
+            : base(DiskStationApi.FileStationList, "SYNO.FileStation.List", httpClient, cacheManager, logger)
         {
         }
-
+        
-        public IEnumerable<int> GetApiVersion(DownloadStationSettings settings)
-        {
-            return base.GetApiVersion(settings, DiskStationApi.FileStationList);
-        }
-
         public SharedFolderMapping GetSharedFolderMapping(string sharedFolder, DownloadStationSettings settings)
         {
             var info = GetInfoFileOrDirectory(sharedFolder, settings);
@@ -38,16 +34,11 @@ public SharedFolderMapping GetSharedFolderMapping(string sharedFolder, DownloadS
 
         public FileStationListFileInfoResponse GetInfoFileOrDirectory(string path, DownloadStationSettings settings)
         {
-            var arguments = new Dictionary<string, object>
+            var requestBuilder = BuildRequest(settings, "getinfo", 2);
-            {
+            requestBuilder.AddQueryParam("path", new[] { path }.ToJson());
-                { "api", "SYNO.FileStation.List" },
+            requestBuilder.AddQueryParam("additional", "[\"real_path\"]");
-                { "version", "2" },
-                { "method", "getinfo" },
-                { "path", new [] { path }.ToJson() },
-                { "additional", $"[\"real_path\"]" }
-            };
 
-            var response = ProcessRequest<FileStationListResponse>(DiskStationApi.FileStationList, arguments, settings, $"get info of {path}");
+            var response = ProcessRequest<FileStationListResponse>(requestBuilder, $"get info of {path}", settings);
 
             return response.Data.Files.First();
         }

src/NzbDrone.Core/Download/Clients/DownloadStation/TorrentDownloadStation.cs

@@ -5,7 +5,6 @@
 using System.Net;
 using FluentValidation.Results;
 using NLog;
-using NzbDrone.Common.Cache;
 using NzbDrone.Common.Disk;
 using NzbDrone.Common.Extensions;
 using NzbDrone.Common.Http;
@@ -20,7 +19,8 @@ namespace NzbDrone.Core.Download.Clients.DownloadStation
 {
     public class TorrentDownloadStation : TorrentClientBase<DownloadStationSettings>
     {
-        protected readonly IDownloadStationProxy _proxy;
+        protected readonly IDownloadStationInfoProxy _dsInfoProxy;
+        protected readonly IDownloadStationTaskProxy _dsTaskProxy;
         protected readonly ISharedFolderResolver _sharedFolderResolver;
         protected readonly ISerialNumberProvider _serialNumberProvider;
         protected readonly IFileStationProxy _fileStationProxy;
@@ -28,7 +28,8 @@ public class TorrentDownloadStation : TorrentClientBase<DownloadStationSettings>
         public TorrentDownloadStation(ISharedFolderResolver sharedFolderResolver,
                                       ISerialNumberProvider serialNumberProvider,
                                       IFileStationProxy fileStationProxy,
-                                      IDownloadStationProxy proxy,
+                                      IDownloadStationInfoProxy dsInfoProxy,
+                                      IDownloadStationTaskProxy dsTaskProxy,
                                       ITorrentFileInfoReader torrentFileInfoReader,
                                       IHttpClient httpClient,
                                       IConfigService configService,
@@ -37,7 +38,8 @@ public TorrentDownloadStation(ISharedFolderResolver sharedFolderResolver,
                                       Logger logger)
             : base(torrentFileInfoReader, httpClient, configService, diskProvider, remotePathMappingService, logger)
         {
-            _proxy = proxy;
+            _dsInfoProxy = dsInfoProxy;
+            _dsTaskProxy = dsTaskProxy;
             _fileStationProxy = fileStationProxy;
             _sharedFolderResolver = sharedFolderResolver;
             _serialNumberProvider = serialNumberProvider;
@@ -47,7 +49,7 @@ public TorrentDownloadStation(ISharedFolderResolver sharedFolderResolver,
 
         protected IEnumerable<DownloadStationTask> GetTasks()
         {
-            return _proxy.GetTasks(Settings).Where(v => v.Type.ToLower() == DownloadStationTaskType.BT.ToString().ToLower());
+            return _dsTaskProxy.GetTasks(Settings).Where(v => v.Type.ToLower() == DownloadStationTaskType.BT.ToString().ToLower());
         }
 
         public override IEnumerable<DownloadClientItem> GetItems()
@@ -129,7 +131,7 @@ public override void RemoveItem(string downloadId, bool deleteData)
                 DeleteItemData(downloadId);
             }
 
-            _proxy.RemoveTask(ParseDownloadId(downloadId), Settings);
+            _dsTaskProxy.RemoveTask(ParseDownloadId(downloadId), Settings);
             _logger.Debug("{0} removed correctly", downloadId);
         }
 
@@ -148,7 +150,7 @@ protected override string AddFromMagnetLink(RemoteEpisode remoteEpisode, string
         {
             var hashedSerialNumber = _serialNumberProvider.GetSerialNumber(Settings);
 
-            _proxy.AddTaskFromUrl(magnetLink, GetDownloadDirectory(), Settings);
+            _dsTaskProxy.AddTaskFromUrl(magnetLink, GetDownloadDirectory(), Settings);
 
             var item = GetTasks().SingleOrDefault(t => t.Additional.Detail["uri"] == magnetLink);
 
@@ -167,7 +169,7 @@ protected override string AddFromTorrentFile(RemoteEpisode remoteEpisode, string
         {
             var hashedSerialNumber = _serialNumberProvider.GetSerialNumber(Settings);
 
-            _proxy.AddTaskFromData(fileContent, filename, GetDownloadDirectory(), Settings);
+            _dsTaskProxy.AddTaskFromData(fileContent, filename, GetDownloadDirectory(), Settings);
 
             var items = GetTasks().Where(t => t.Additional.Detail["uri"] == Path.GetFileNameWithoutExtension(filename));
 
@@ -358,13 +360,13 @@ protected ValidationFailure TestConnection()
 
         protected ValidationFailure ValidateVersion()
         {
-            var versionRange = _proxy.GetApiVersion(Settings);
+            var info = _dsTaskProxy.GetApiInfo(Settings);
 
-            _logger.Debug("Download Station api version information: Min {0} - Max {1}", versionRange.Min(), versionRange.Max());
+            _logger.Debug("Download Station api version information: Min {0} - Max {1}", info.MinVersion, info.MaxVersion);
 
-            if (!versionRange.Contains(2))
+            if (info.MinVersion > 2 || info.MaxVersion < 2)
             {
-                return new ValidationFailure(string.Empty, $"Download Station API version not supported, should be at least 2. It supports from {versionRange.Min()} to {versionRange.Max()}");
+                return new ValidationFailure(string.Empty, $"Download Station API version not supported, should be at least 2. It supports from {info.MinVersion} to {info.MaxVersion}");
             }
 
             return null;
@@ -395,7 +397,7 @@ protected string CreateDownloadId(string id, string hashedSerialNumber)
 
         protected string GetDefaultDir()
         {
-            var config = _proxy.GetConfig(Settings);
+            var config = _dsInfoProxy.GetConfig(Settings);
 
             var path = config["default_destination"] as string;
 

src/NzbDrone.Core/Download/Clients/DownloadStation/UsenetDownloadStation.cs

@@ -17,7 +17,8 @@ namespace NzbDrone.Core.Download.Clients.DownloadStation
 {
     public class UsenetDownloadStation : UsenetClientBase<DownloadStationSettings>
     {
-        protected readonly IDownloadStationProxy _proxy;
+        protected readonly IDownloadStationInfoProxy _dsInfoProxy;
+        protected readonly IDownloadStationTaskProxy _dsTaskProxy;
         protected readonly ISharedFolderResolver _sharedFolderResolver;
         protected readonly ISerialNumberProvider _serialNumberProvider;
         protected readonly IFileStationProxy _fileStationProxy;
@@ -25,7 +26,8 @@ public class UsenetDownloadStation : UsenetClientBase<DownloadStationSettings>
         public UsenetDownloadStation(ISharedFolderResolver sharedFolderResolver,
                                      ISerialNumberProvider serialNumberProvider,
                                      IFileStationProxy fileStationProxy,
-                                     IDownloadStationProxy proxy,
+                                     IDownloadStationInfoProxy dsInfoProxy,
+                                     IDownloadStationTaskProxy dsTaskProxy,
                                      IHttpClient httpClient,
                                      IConfigService configService,
                                      IDiskProvider diskProvider,
@@ -34,7 +36,8 @@ Logger logger
                                      )
             : base(httpClient, configService, diskProvider, remotePathMappingService, logger)
         {
-            _proxy = proxy;
+            _dsInfoProxy = dsInfoProxy;
+            _dsTaskProxy = dsTaskProxy;
             _fileStationProxy = fileStationProxy;
             _sharedFolderResolver = sharedFolderResolver;
             _serialNumberProvider = serialNumberProvider;
@@ -44,7 +47,7 @@ Logger logger
 
         protected IEnumerable<DownloadStationTask> GetTasks()
         {
-            return _proxy.GetTasks(Settings).Where(v => v.Type.ToLower() == DownloadStationTaskType.NZB.ToString().ToLower());
+            return _dsTaskProxy.GetTasks(Settings).Where(v => v.Type.ToLower() == DownloadStationTaskType.NZB.ToString().ToLower());
         }
 
         public override IEnumerable<DownloadClientItem> GetItems()
@@ -153,7 +156,7 @@ public override void RemoveItem(string downloadId, bool deleteData)
                 DeleteItemData(downloadId);
             }
 
-            _proxy.RemoveTask(ParseDownloadId(downloadId), Settings);
+            _dsTaskProxy.RemoveTask(ParseDownloadId(downloadId), Settings);
             _logger.Debug("{0} removed correctly", downloadId);
         }
 
@@ -161,7 +164,7 @@ protected override string AddFromNzbFile(RemoteEpisode remoteEpisode, string fil
         {
             var hashedSerialNumber = _serialNumberProvider.GetSerialNumber(Settings);
 
-            _proxy.AddTaskFromData(fileContent, filename, GetDownloadDirectory(), Settings);
+            _dsTaskProxy.AddTaskFromData(fileContent, filename, GetDownloadDirectory(), Settings);
 
             var items = GetTasks().Where(t => t.Additional.Detail["uri"] == filename);
 
@@ -276,13 +279,13 @@ protected ValidationFailure TestConnection()
 
         protected ValidationFailure ValidateVersion()
         {
-            var versionRange = _proxy.GetApiVersion(Settings);
+            var info = _dsTaskProxy.GetApiInfo(Settings);
 
-            _logger.Debug("Download Station api version information: Min {0} - Max {1}", versionRange.Min(), versionRange.Max());
+            _logger.Debug("Download Station api version information: Min {0} - Max {1}", info.MinVersion, info.MaxVersion);
 
-            if (!versionRange.Contains(2))
+            if (info.MinVersion > 2 || info.MaxVersion < 2)
             {
-                return new ValidationFailure(string.Empty, $"Download Station API version not supported, should be at least 2. It supports from {versionRange.Min()} to {versionRange.Max()}");
+                return new ValidationFailure(string.Empty, $"Download Station API version not supported, should be at least 2. It supports from {info.MinVersion} to {info.MaxVersion}");
             }
 
             return null;
@@ -394,7 +397,7 @@ protected string CreateDownloadId(string id, string hashedSerialNumber)
 
         protected string GetDefaultDir()
         {
-            var config = _proxy.GetConfig(Settings);
+            var config = _dsInfoProxy.GetConfig(Settings);
 
             var path = config["default_destination"] as string;
 

src/NzbDrone.Core/NzbDrone.Core.csproj

@@ -355,8 +355,9 @@
     <Compile Include="Download\Clients\Deluge\DelugeUpdateUIResult.cs" />
     <Compile Include="Download\Clients\DownloadClientAuthenticationException.cs" />
     <Compile Include="Download\Clients\DownloadClientException.cs" />
+    <Compile Include="Download\Clients\DownloadStation\Proxies\DownloadStationInfoProxy.cs" />
     <Compile Include="Download\Clients\DownloadStation\TorrentDownloadStation.cs" />
-    <Compile Include="Download\Clients\DownloadStation\Proxies\DownloadStationProxy.cs" />
+    <Compile Include="Download\Clients\DownloadStation\Proxies\DownloadStationTaskProxy.cs" />
     <Compile Include="Download\Clients\DownloadStation\DownloadStationSettings.cs" />
     <Compile Include="Download\Clients\DownloadStation\DownloadStationTask.cs" />
     <Compile Include="Download\Clients\DownloadStation\DownloadStationTaskAdditional.cs" />