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731 lines
25 KiB
731 lines
25 KiB
using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.IO;
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using System.Linq;
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using System.Net.Sockets;
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using System.Reflection;
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using System.Threading;
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using System.Threading.Tasks;
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using Emby.Server.Implementations.Net;
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using Emby.Server.Implementations.Services;
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using MediaBrowser.Common.Extensions;
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using MediaBrowser.Common.Net;
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using MediaBrowser.Controller;
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using MediaBrowser.Controller.Configuration;
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using MediaBrowser.Controller.Net;
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using MediaBrowser.Model.Events;
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using MediaBrowser.Model.Extensions;
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using MediaBrowser.Model.Serialization;
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using MediaBrowser.Model.Services;
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using Microsoft.AspNetCore.Http;
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using Microsoft.AspNetCore.Http.Internal;
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using Microsoft.AspNetCore.WebUtilities;
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using Microsoft.Extensions.Configuration;
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using Microsoft.Extensions.Logging;
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using ServiceStack.Text.Jsv;
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namespace Emby.Server.Implementations.HttpServer
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{
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public class HttpListenerHost : IHttpServer, IDisposable
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{
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private readonly ILogger _logger;
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private readonly IServerConfigurationManager _config;
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private readonly INetworkManager _networkManager;
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private readonly IServerApplicationHost _appHost;
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private readonly IJsonSerializer _jsonSerializer;
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private readonly IXmlSerializer _xmlSerializer;
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private readonly IHttpListener _socketListener;
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private readonly Func<Type, Func<string, object>> _funcParseFn;
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private readonly string _defaultRedirectPath;
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private readonly string _baseUrlPrefix;
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private readonly Dictionary<Type, Type> ServiceOperationsMap = new Dictionary<Type, Type>();
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private IWebSocketListener[] _webSocketListeners = Array.Empty<IWebSocketListener>();
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private readonly List<IWebSocketConnection> _webSocketConnections = new List<IWebSocketConnection>();
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private bool _disposed = false;
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public HttpListenerHost(
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IServerApplicationHost applicationHost,
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ILogger<HttpListenerHost> logger,
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IServerConfigurationManager config,
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IConfiguration configuration,
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INetworkManager networkManager,
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IJsonSerializer jsonSerializer,
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IXmlSerializer xmlSerializer,
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IHttpListener socketListener)
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{
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_appHost = applicationHost;
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_logger = logger;
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_config = config;
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_defaultRedirectPath = configuration["HttpListenerHost:DefaultRedirectPath"];
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_baseUrlPrefix = _config.Configuration.BaseUrl;
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_networkManager = networkManager;
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_jsonSerializer = jsonSerializer;
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_xmlSerializer = xmlSerializer;
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_socketListener = socketListener;
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_socketListener.WebSocketConnected = OnWebSocketConnected;
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_funcParseFn = t => s => JsvReader.GetParseFn(t)(s);
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Instance = this;
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ResponseFilters = Array.Empty<Action<IRequest, HttpResponse, object>>();
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}
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public Action<IRequest, HttpResponse, object>[] ResponseFilters { get; set; }
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public static HttpListenerHost Instance { get; protected set; }
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public string[] UrlPrefixes { get; private set; }
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public string GlobalResponse { get; set; }
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public ServiceController ServiceController { get; private set; }
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public event EventHandler<GenericEventArgs<IWebSocketConnection>> WebSocketConnected;
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public object CreateInstance(Type type)
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{
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return _appHost.CreateInstance(type);
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}
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private static string NormalizeUrlPath(string path)
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{
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if (path.StartsWith("/"))
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{
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// If the path begins with a leading slash, just return it as-is
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return path;
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}
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else
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{
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// If the path does not begin with a leading slash, append one for consistency
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return "/" + path;
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}
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}
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/// <summary>
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/// Applies the request filters. Returns whether or not the request has been handled
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/// and no more processing should be done.
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/// </summary>
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/// <returns></returns>
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public void ApplyRequestFilters(IRequest req, HttpResponse res, object requestDto)
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{
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// Exec all RequestFilter attributes with Priority < 0
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var attributes = GetRequestFilterAttributes(requestDto.GetType());
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int count = attributes.Count;
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int i = 0;
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for (; i < count && attributes[i].Priority < 0; i++)
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{
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var attribute = attributes[i];
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attribute.RequestFilter(req, res, requestDto);
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}
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// Exec remaining RequestFilter attributes with Priority >= 0
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for (; i < count && attributes[i].Priority >= 0; i++)
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{
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var attribute = attributes[i];
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attribute.RequestFilter(req, res, requestDto);
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}
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}
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public Type GetServiceTypeByRequest(Type requestType)
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{
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ServiceOperationsMap.TryGetValue(requestType, out var serviceType);
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return serviceType;
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}
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public void AddServiceInfo(Type serviceType, Type requestType)
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{
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ServiceOperationsMap[requestType] = serviceType;
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}
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private List<IHasRequestFilter> GetRequestFilterAttributes(Type requestDtoType)
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{
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var attributes = requestDtoType.GetCustomAttributes(true).OfType<IHasRequestFilter>().ToList();
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var serviceType = GetServiceTypeByRequest(requestDtoType);
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if (serviceType != null)
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{
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attributes.AddRange(serviceType.GetCustomAttributes(true).OfType<IHasRequestFilter>());
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}
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attributes.Sort((x, y) => x.Priority - y.Priority);
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return attributes;
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}
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private void OnWebSocketConnected(WebSocketConnectEventArgs e)
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{
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if (_disposed)
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{
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return;
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}
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var connection = new WebSocketConnection(e.WebSocket, e.Endpoint, _jsonSerializer, _logger)
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{
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OnReceive = ProcessWebSocketMessageReceived,
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Url = e.Url,
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QueryString = e.QueryString ?? new QueryCollection()
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};
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connection.Closed += OnConnectionClosed;
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lock (_webSocketConnections)
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{
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_webSocketConnections.Add(connection);
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}
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WebSocketConnected?.Invoke(this, new GenericEventArgs<IWebSocketConnection>(connection));
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}
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private void OnConnectionClosed(object sender, EventArgs e)
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{
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lock (_webSocketConnections)
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{
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_webSocketConnections.Remove((IWebSocketConnection)sender);
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}
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}
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private static Exception GetActualException(Exception ex)
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{
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if (ex is AggregateException agg)
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{
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var inner = agg.InnerException;
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if (inner != null)
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{
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return GetActualException(inner);
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}
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else
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{
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var inners = agg.InnerExceptions;
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if (inners != null && inners.Count > 0)
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{
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return GetActualException(inners[0]);
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}
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}
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}
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return ex;
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}
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private int GetStatusCode(Exception ex)
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{
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switch (ex)
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{
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case ArgumentException _: return 400;
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case SecurityException _: return 401;
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case DirectoryNotFoundException _:
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case FileNotFoundException _:
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case ResourceNotFoundException _: return 404;
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case MethodNotAllowedException _: return 405;
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case RemoteServiceUnavailableException _: return 502;
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default: return 500;
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}
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}
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private async Task ErrorHandler(Exception ex, IRequest httpReq, bool logExceptionStackTrace)
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{
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try
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{
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ex = GetActualException(ex);
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if (logExceptionStackTrace)
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{
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_logger.LogError(ex, "Error processing request");
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}
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else
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{
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_logger.LogError("Error processing request: {Message}", ex.Message);
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}
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var httpRes = httpReq.Response;
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if (httpRes.HasStarted)
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{
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return;
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}
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var statusCode = GetStatusCode(ex);
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httpRes.StatusCode = statusCode;
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var errContent = NormalizeExceptionMessage(ex.Message);
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httpRes.ContentType = "text/plain";
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httpRes.ContentLength = errContent.Length;
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await httpRes.WriteAsync(errContent).ConfigureAwait(false);
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}
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catch (Exception errorEx)
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{
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_logger.LogError(errorEx, "Error this.ProcessRequest(context)(Exception while writing error to the response)");
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}
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}
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private string NormalizeExceptionMessage(string msg)
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{
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if (msg == null)
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{
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return string.Empty;
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}
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// Strip any information we don't want to reveal
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msg = msg.Replace(_config.ApplicationPaths.ProgramSystemPath, string.Empty, StringComparison.OrdinalIgnoreCase);
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msg = msg.Replace(_config.ApplicationPaths.ProgramDataPath, string.Empty, StringComparison.OrdinalIgnoreCase);
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return msg;
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}
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/// <summary>
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/// Shut down the Web Service
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/// </summary>
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public void Stop()
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{
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List<IWebSocketConnection> connections;
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lock (_webSocketConnections)
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{
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connections = _webSocketConnections.ToList();
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_webSocketConnections.Clear();
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}
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foreach (var connection in connections)
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{
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try
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{
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connection.Dispose();
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, "Error disposing connection");
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}
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}
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}
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public static string RemoveQueryStringByKey(string url, string key)
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{
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var uri = new Uri(url);
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// this gets all the query string key value pairs as a collection
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var newQueryString = QueryHelpers.ParseQuery(uri.Query);
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var originalCount = newQueryString.Count;
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if (originalCount == 0)
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{
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return url;
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}
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// this removes the key if exists
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newQueryString.Remove(key);
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if (originalCount == newQueryString.Count)
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{
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return url;
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}
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// this gets the page path from root without QueryString
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string pagePathWithoutQueryString = url.Split(new[] { '?' }, StringSplitOptions.RemoveEmptyEntries)[0];
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return newQueryString.Count > 0
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? QueryHelpers.AddQueryString(pagePathWithoutQueryString, newQueryString.ToDictionary(kv => kv.Key, kv => kv.Value.ToString()))
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: pagePathWithoutQueryString;
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}
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private static string GetUrlToLog(string url)
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{
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url = RemoveQueryStringByKey(url, "api_key");
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return url;
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}
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private static string NormalizeConfiguredLocalAddress(string address)
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{
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var add = address.AsSpan().Trim('/');
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int index = add.IndexOf('/');
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if (index != -1)
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{
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add = add.Slice(index + 1);
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}
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return add.TrimStart('/').ToString();
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}
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private bool ValidateHost(string host)
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{
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var hosts = _config
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.Configuration
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.LocalNetworkAddresses
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.Select(NormalizeConfiguredLocalAddress)
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.ToList();
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if (hosts.Count == 0)
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{
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return true;
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}
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host = host ?? string.Empty;
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if (_networkManager.IsInPrivateAddressSpace(host))
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{
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hosts.Add("localhost");
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hosts.Add("127.0.0.1");
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return hosts.Any(i => host.IndexOf(i, StringComparison.OrdinalIgnoreCase) != -1);
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}
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return true;
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}
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private bool ValidateRequest(string remoteIp, bool isLocal)
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{
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if (isLocal)
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{
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return true;
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}
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if (_config.Configuration.EnableRemoteAccess)
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{
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var addressFilter = _config.Configuration.RemoteIPFilter.Where(i => !string.IsNullOrWhiteSpace(i)).ToArray();
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if (addressFilter.Length > 0 && !_networkManager.IsInLocalNetwork(remoteIp))
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{
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if (_config.Configuration.IsRemoteIPFilterBlacklist)
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{
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return !_networkManager.IsAddressInSubnets(remoteIp, addressFilter);
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}
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else
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{
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return _networkManager.IsAddressInSubnets(remoteIp, addressFilter);
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}
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}
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}
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else
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{
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if (!_networkManager.IsInLocalNetwork(remoteIp))
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{
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return false;
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}
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}
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return true;
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}
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private bool ValidateSsl(string remoteIp, string urlString)
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{
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if (_config.Configuration.RequireHttps && _appHost.EnableHttps && !_config.Configuration.IsBehindProxy)
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{
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if (urlString.IndexOf("https://", StringComparison.OrdinalIgnoreCase) == -1)
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{
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// These are hacks, but if these ever occur on ipv6 in the local network they could be incorrectly redirected
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if (urlString.IndexOf("system/ping", StringComparison.OrdinalIgnoreCase) != -1
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|| urlString.IndexOf("dlna/", StringComparison.OrdinalIgnoreCase) != -1)
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{
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return true;
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}
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if (!_networkManager.IsInLocalNetwork(remoteIp))
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{
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return false;
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}
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}
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}
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return true;
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}
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/// <summary>
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/// Overridable method that can be used to implement a custom hnandler
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/// </summary>
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public async Task RequestHandler(IHttpRequest httpReq, string urlString, string host, string localPath, CancellationToken cancellationToken)
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{
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var stopWatch = new Stopwatch();
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stopWatch.Start();
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var httpRes = httpReq.Response;
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string urlToLog = null;
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string remoteIp = httpReq.RemoteIp;
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try
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{
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if (_disposed)
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{
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httpRes.StatusCode = 503;
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httpRes.ContentType = "text/plain";
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await httpRes.WriteAsync("Server shutting down", cancellationToken).ConfigureAwait(false);
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return;
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}
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if (!ValidateHost(host))
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{
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httpRes.StatusCode = 400;
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httpRes.ContentType = "text/plain";
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await httpRes.WriteAsync("Invalid host", cancellationToken).ConfigureAwait(false);
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return;
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}
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if (!ValidateRequest(remoteIp, httpReq.IsLocal))
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{
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httpRes.StatusCode = 403;
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httpRes.ContentType = "text/plain";
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await httpRes.WriteAsync("Forbidden", cancellationToken).ConfigureAwait(false);
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return;
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}
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if (!ValidateSsl(httpReq.RemoteIp, urlString))
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{
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RedirectToSecureUrl(httpReq, httpRes, urlString);
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return;
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}
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if (string.Equals(httpReq.Verb, "OPTIONS", StringComparison.OrdinalIgnoreCase))
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{
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httpRes.StatusCode = 200;
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httpRes.Headers.Add("Access-Control-Allow-Origin", "*");
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httpRes.Headers.Add("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, PATCH, OPTIONS");
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httpRes.Headers.Add("Access-Control-Allow-Headers", "Content-Type, Authorization, Range, X-MediaBrowser-Token, X-Emby-Authorization");
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httpRes.ContentType = "text/plain";
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await httpRes.WriteAsync(string.Empty, cancellationToken).ConfigureAwait(false);
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return;
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}
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urlToLog = GetUrlToLog(urlString);
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if (string.Equals(localPath, _baseUrlPrefix + "/", StringComparison.OrdinalIgnoreCase)
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|| string.Equals(localPath, _baseUrlPrefix, StringComparison.OrdinalIgnoreCase)
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|| string.Equals(localPath, "/", StringComparison.OrdinalIgnoreCase)
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|| string.IsNullOrEmpty(localPath)
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|| !localPath.StartsWith(_baseUrlPrefix))
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{
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// Always redirect back to the default path if the base prefix is invalid or missing
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_logger.LogDebug("Normalizing a URL at {0}", localPath);
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httpRes.Redirect(_baseUrlPrefix + "/" + _defaultRedirectPath);
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return;
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}
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if (!string.IsNullOrEmpty(GlobalResponse))
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{
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// We don't want the address pings in ApplicationHost to fail
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if (localPath.IndexOf("system/ping", StringComparison.OrdinalIgnoreCase) == -1)
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{
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httpRes.StatusCode = 503;
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httpRes.ContentType = "text/html";
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await httpRes.WriteAsync(GlobalResponse, cancellationToken).ConfigureAwait(false);
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return;
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}
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}
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var handler = GetServiceHandler(httpReq);
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if (handler != null)
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{
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await handler.ProcessRequestAsync(this, httpReq, httpRes, _logger, cancellationToken).ConfigureAwait(false);
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}
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else
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{
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await ErrorHandler(new FileNotFoundException(), httpReq, false).ConfigureAwait(false);
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}
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}
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catch (Exception ex) when (ex is SocketException || ex is IOException || ex is OperationCanceledException)
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{
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await ErrorHandler(ex, httpReq, false).ConfigureAwait(false);
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}
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catch (SecurityException ex)
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{
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await ErrorHandler(ex, httpReq, false).ConfigureAwait(false);
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}
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catch (Exception ex)
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{
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var logException = !string.Equals(ex.GetType().Name, "SocketException", StringComparison.OrdinalIgnoreCase);
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await ErrorHandler(ex, httpReq, logException).ConfigureAwait(false);
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}
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finally
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{
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if (httpRes.StatusCode >= 500)
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{
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_logger.LogDebug("Sending HTTP Response 500 in response to {Url}", urlToLog);
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}
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stopWatch.Stop();
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var elapsed = stopWatch.Elapsed;
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if (elapsed.TotalMilliseconds > 500)
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{
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_logger.LogWarning("HTTP Response {StatusCode} to {RemoteIp}. Time (slow): {Elapsed:g}. {Url}", httpRes.StatusCode, remoteIp, elapsed, urlToLog);
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}
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}
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}
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|
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// Entry point for HttpListener
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public ServiceHandler GetServiceHandler(IHttpRequest httpReq)
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{
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var pathInfo = httpReq.PathInfo;
|
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|
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pathInfo = ServiceHandler.GetSanitizedPathInfo(pathInfo, out string contentType);
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var restPath = ServiceController.GetRestPathForRequest(httpReq.HttpMethod, pathInfo);
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if (restPath != null)
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{
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return new ServiceHandler(restPath, contentType);
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}
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|
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_logger.LogError("Could not find handler for {PathInfo}", pathInfo);
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return null;
|
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}
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|
|
private void RedirectToSecureUrl(IHttpRequest httpReq, HttpResponse httpRes, string url)
|
|
{
|
|
if (Uri.TryCreate(url, UriKind.Absolute, out Uri uri))
|
|
{
|
|
var builder = new UriBuilder(uri)
|
|
{
|
|
Port = _config.Configuration.PublicHttpsPort,
|
|
Scheme = "https"
|
|
};
|
|
url = builder.Uri.ToString();
|
|
}
|
|
|
|
httpRes.Redirect(url);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Adds the rest handlers.
|
|
/// </summary>
|
|
/// <param name="services">The services.</param>
|
|
/// <param name="listeners"></param>
|
|
/// <param name="urlPrefixes"></param>
|
|
public void Init(IEnumerable<IService> services, IEnumerable<IWebSocketListener> listeners, IEnumerable<string> urlPrefixes)
|
|
{
|
|
_webSocketListeners = listeners.ToArray();
|
|
UrlPrefixes = urlPrefixes.ToArray();
|
|
ServiceController = new ServiceController();
|
|
|
|
var types = services.Select(r => r.GetType());
|
|
ServiceController.Init(this, types);
|
|
|
|
ResponseFilters = new Action<IRequest, HttpResponse, object>[]
|
|
{
|
|
new ResponseFilter(_logger).FilterResponse
|
|
};
|
|
}
|
|
|
|
public RouteAttribute[] GetRouteAttributes(Type requestType)
|
|
{
|
|
var routes = requestType.GetTypeInfo().GetCustomAttributes<RouteAttribute>(true).ToList();
|
|
var clone = routes.ToList();
|
|
|
|
foreach (var route in clone)
|
|
{
|
|
routes.Add(new RouteAttribute(NormalizeCustomRoutePath(route.Path), route.Verbs)
|
|
{
|
|
Notes = route.Notes,
|
|
Priority = route.Priority,
|
|
Summary = route.Summary
|
|
});
|
|
|
|
routes.Add(new RouteAttribute(NormalizeEmbyRoutePath(route.Path), route.Verbs)
|
|
{
|
|
Notes = route.Notes,
|
|
Priority = route.Priority,
|
|
Summary = route.Summary
|
|
});
|
|
|
|
routes.Add(new RouteAttribute(NormalizeMediaBrowserRoutePath(route.Path), route.Verbs)
|
|
{
|
|
Notes = route.Notes,
|
|
Priority = route.Priority,
|
|
Summary = route.Summary
|
|
});
|
|
}
|
|
|
|
return routes.ToArray();
|
|
}
|
|
|
|
public Func<string, object> GetParseFn(Type propertyType)
|
|
{
|
|
return _funcParseFn(propertyType);
|
|
}
|
|
|
|
public void SerializeToJson(object o, Stream stream)
|
|
{
|
|
_jsonSerializer.SerializeToStream(o, stream);
|
|
}
|
|
|
|
public void SerializeToXml(object o, Stream stream)
|
|
{
|
|
_xmlSerializer.SerializeToStream(o, stream);
|
|
}
|
|
|
|
public Task<object> DeserializeXml(Type type, Stream stream)
|
|
{
|
|
return Task.FromResult(_xmlSerializer.DeserializeFromStream(type, stream));
|
|
}
|
|
|
|
public Task<object> DeserializeJson(Type type, Stream stream)
|
|
{
|
|
return _jsonSerializer.DeserializeFromStreamAsync(stream, type);
|
|
}
|
|
|
|
public Task ProcessWebSocketRequest(HttpContext context)
|
|
{
|
|
return _socketListener.ProcessWebSocketRequest(context);
|
|
}
|
|
|
|
private string NormalizeEmbyRoutePath(string path)
|
|
{
|
|
_logger.LogDebug("Normalizing /emby route");
|
|
return _baseUrlPrefix + "/emby" + NormalizeUrlPath(path);
|
|
}
|
|
|
|
private string NormalizeMediaBrowserRoutePath(string path)
|
|
{
|
|
_logger.LogDebug("Normalizing /mediabrowser route");
|
|
return _baseUrlPrefix + "/mediabrowser" + NormalizeUrlPath(path);
|
|
}
|
|
|
|
private string NormalizeCustomRoutePath(string path)
|
|
{
|
|
_logger.LogDebug("Normalizing custom route {0}", path);
|
|
return _baseUrlPrefix + NormalizeUrlPath(path);
|
|
}
|
|
|
|
/// <inheritdoc />
|
|
public void Dispose()
|
|
{
|
|
Dispose(true);
|
|
GC.SuppressFinalize(this);
|
|
}
|
|
|
|
protected virtual void Dispose(bool disposing)
|
|
{
|
|
if (_disposed) return;
|
|
|
|
if (disposing)
|
|
{
|
|
Stop();
|
|
}
|
|
|
|
_disposed = true;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Processes the web socket message received.
|
|
/// </summary>
|
|
/// <param name="result">The result.</param>
|
|
private Task ProcessWebSocketMessageReceived(WebSocketMessageInfo result)
|
|
{
|
|
if (_disposed)
|
|
{
|
|
return Task.CompletedTask;
|
|
}
|
|
|
|
_logger.LogDebug("Websocket message received: {0}", result.MessageType);
|
|
|
|
IEnumerable<Task> GetTasks()
|
|
{
|
|
foreach (var x in _webSocketListeners)
|
|
{
|
|
yield return x.ProcessMessageAsync(result);
|
|
}
|
|
}
|
|
|
|
return Task.WhenAll(GetTasks());
|
|
}
|
|
}
|
|
}
|