jellyfin-server/Emby.Server.Implementations/HttpServer/HttpListenerHost.cs

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using System;
using System.Collections.Generic;
using System.Diagnostics;
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using System.Globalization;
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using System.IO;
using System.Linq;
using System.Net.Sockets;
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using System.Reflection;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
using Emby.Server.Implementations.Net;
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using Emby.Server.Implementations.Services;
using Emby.Server.Implementations.SocketSharp;
using MediaBrowser.Common.Extensions;
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using MediaBrowser.Common.Net;
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using MediaBrowser.Controller;
using MediaBrowser.Controller.Configuration;
using MediaBrowser.Controller.Net;
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;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Http.Internal;
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using Microsoft.AspNetCore.WebUtilities;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging;
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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{
private string DefaultRedirectPath { get; set; }
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public string[] UrlPrefixes { get; private set; }
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public event EventHandler<GenericEventArgs<IWebSocketConnection>> WebSocketConnected;
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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;
private readonly IXmlSerializer _xmlSerializer;
private readonly IHttpListener _socketListener;
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private readonly Func<Type, Func<string, object>> _funcParseFn;
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public Action<IRequest, IResponse, object>[] ResponseFilters { get; set; }
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private readonly Dictionary<Type, Type> ServiceOperationsMap = new Dictionary<Type, Type>();
public static HttpListenerHost Instance { get; protected set; }
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private IWebSocketListener[] _webSocketListeners = Array.Empty<IWebSocketListener>();
private readonly List<IWebSocketConnection> _webSocketConnections = new List<IWebSocketConnection>();
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public HttpListenerHost(
IServerApplicationHost applicationHost,
ILoggerFactory loggerFactory,
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IServerConfigurationManager config,
IConfiguration configuration,
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INetworkManager networkManager,
IJsonSerializer jsonSerializer,
IXmlSerializer xmlSerializer,
IHttpListener socketListener)
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{
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_appHost = applicationHost;
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Logger = loggerFactory.CreateLogger("HttpServer");
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_config = config;
DefaultRedirectPath = configuration["HttpListenerHost:DefaultRedirectPath"];
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_networkManager = networkManager;
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_jsonSerializer = jsonSerializer;
_xmlSerializer = xmlSerializer;
_socketListener = socketListener;
_socketListener.WebSocketConnected = OnWebSocketConnected;
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_funcParseFn = t => s => JsvReader.GetParseFn(t)(s);
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Instance = this;
ResponseFilters = Array.Empty<Action<IRequest, IResponse, object>>();
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}
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public string GlobalResponse { get; set; }
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protected ILogger Logger { get; }
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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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/// <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.
/// </summary>
/// <returns></returns>
public void ApplyRequestFilters(IRequest req, IResponse res, object requestDto)
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{
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//Exec all RequestFilter attributes with Priority < 0
var attributes = GetRequestFilterAttributes(requestDto.GetType());
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int count = attributes.Count;
int i = 0;
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for (; i < count && attributes[i].Priority < 0; i++)
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{
var attribute = attributes[i];
attribute.RequestFilter(req, res, requestDto);
}
//Exec remaining RequestFilter attributes with Priority >= 0
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for (; i < count && attributes[i].Priority >= 0; i++)
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{
var attribute = attributes[i];
attribute.RequestFilter(req, res, requestDto);
}
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}
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public Type GetServiceTypeByRequest(Type requestType)
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{
ServiceOperationsMap.TryGetValue(requestType, out var serviceType);
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return serviceType;
}
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public void AddServiceInfo(Type serviceType, Type requestType)
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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.GetTypeInfo().GetCustomAttributes(true).OfType<IHasRequestFilter>().ToList();
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var serviceType = GetServiceTypeByRequest(requestDtoType);
if (serviceType != null)
{
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attributes.AddRange(serviceType.GetTypeInfo().GetCustomAttributes(true).OfType<IHasRequestFilter>());
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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)
{
return;
}
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var connection = new WebSocketConnection(e.WebSocket, e.Endpoint, _jsonSerializer, Logger)
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{
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OnReceive = ProcessWebSocketMessageReceived,
Url = e.Url,
QueryString = e.QueryString ?? new QueryCollection()
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};
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connection.Closed += Connection_Closed;
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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}
private void Connection_Closed(object sender, EventArgs e)
{
lock (_webSocketConnections)
{
_webSocketConnections.Remove((IWebSocketConnection)sender);
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}
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}
private static Exception GetActualException(Exception ex)
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{
if (ex is AggregateException agg)
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{
var inner = agg.InnerException;
if (inner != null)
{
return GetActualException(inner);
}
else
{
var inners = agg.InnerExceptions;
if (inners != null && inners.Count > 0)
{
return GetActualException(inners[0]);
}
}
}
return ex;
}
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private int GetStatusCode(Exception ex)
{
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switch (ex)
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{
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case ArgumentException _: return 400;
case SecurityException _: return 401;
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case DirectoryNotFoundException _:
case FileNotFoundException _:
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case ResourceNotFoundException _: return 404;
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case RemoteServiceUnavailableException _: return 502;
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default: return 500;
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}
}
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private async Task ErrorHandler(Exception ex, IRequest httpReq, bool logExceptionStackTrace, bool logExceptionMessage)
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{
try
{
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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 if (logExceptionMessage)
{
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Logger.LogError(ex.Message);
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}
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var httpRes = httpReq.Response;
if (httpRes.OriginalResponse.HasStarted)
{
return;
}
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var statusCode = GetStatusCode(ex);
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httpRes.StatusCode = statusCode;
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httpRes.ContentType = "text/html";
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await Write(httpRes, NormalizeExceptionMessage(ex.Message)).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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private string NormalizeExceptionMessage(string msg)
{
if (msg == null)
{
return string.Empty;
}
// Strip any information we don't want to reveal
msg = msg.Replace(_config.ApplicationPaths.ProgramSystemPath, string.Empty, StringComparison.OrdinalIgnoreCase);
msg = msg.Replace(_config.ApplicationPaths.ProgramDataPath, string.Empty, StringComparison.OrdinalIgnoreCase);
return msg;
}
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/// <summary>
/// Shut down the Web Service
/// </summary>
public void Stop()
{
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List<IWebSocketConnection> connections;
lock (_webSocketConnections)
{
connections = _webSocketConnections.ToList();
_webSocketConnections.Clear();
}
foreach (var connection in connections)
{
try
{
connection.Dispose();
}
catch
{
}
}
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}
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public static string RemoveQueryStringByKey(string url, string key)
{
var uri = new Uri(url);
// 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;
if (originalCount == 0)
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{
return url;
}
// this removes the key if exists
newQueryString.Remove(key);
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if (originalCount == newQueryString.Count)
{
return url;
}
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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;
}
private static string GetUrlToLog(string url)
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{
url = RemoveQueryStringByKey(url, "api_key");
return url;
}
private static string NormalizeConfiguredLocalAddress(string address)
{
var index = address.Trim('/').IndexOf('/');
if (index != -1)
{
address = address.Substring(index + 1);
}
return address.Trim('/');
}
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private bool ValidateHost(string host)
{
var hosts = _config
.Configuration
.LocalNetworkAddresses
.Select(NormalizeConfiguredLocalAddress)
.ToList();
if (hosts.Count == 0)
{
return true;
}
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host = host ?? string.Empty;
if (_networkManager.IsInPrivateAddressSpace(host))
{
hosts.Add("localhost");
hosts.Add("127.0.0.1");
return hosts.Any(i => host.IndexOf(i, StringComparison.OrdinalIgnoreCase) != -1);
}
return true;
}
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private bool ValidateRequest(string remoteIp, bool isLocal)
{
if (isLocal)
{
return true;
}
if (_config.Configuration.EnableRemoteAccess)
{
var addressFilter = _config.Configuration.RemoteIPFilter.Where(i => !string.IsNullOrWhiteSpace(i)).ToArray();
if (addressFilter.Length > 0 && !_networkManager.IsInLocalNetwork(remoteIp))
{
if (_config.Configuration.IsRemoteIPFilterBlacklist)
{
return !_networkManager.IsAddressInSubnets(remoteIp, addressFilter);
}
else
{
return _networkManager.IsAddressInSubnets(remoteIp, addressFilter);
}
}
}
else
{
if (!_networkManager.IsInLocalNetwork(remoteIp))
{
return false;
}
}
return true;
}
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private bool ValidateSsl(string remoteIp, string urlString)
{
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if (_config.Configuration.RequireHttps && _appHost.EnableHttps && !_config.Configuration.IsBehindProxy)
{
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if (urlString.IndexOf("https://", StringComparison.OrdinalIgnoreCase) == -1)
{
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// These are hacks, but if these ever occur on ipv6 in the local network they could be incorrectly redirected
if (urlString.IndexOf("system/ping", StringComparison.OrdinalIgnoreCase) != -1 ||
urlString.IndexOf("dlna/", StringComparison.OrdinalIgnoreCase) != -1)
{
return true;
}
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if (!_networkManager.IsInLocalNetwork(remoteIp))
{
return false;
}
}
}
return true;
}
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/// <summary>
/// Overridable method that can be used to implement a custom hnandler
/// </summary>
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public async Task RequestHandler(IHttpRequest httpReq, string urlString, string host, string localPath, CancellationToken cancellationToken)
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{
var stopWatch = new Stopwatch();
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)
{
httpRes.StatusCode = 503;
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httpRes.ContentType = "text/plain";
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await Write(httpRes, "Server shutting down").ConfigureAwait(false);
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return;
}
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if (!ValidateHost(host))
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{
httpRes.StatusCode = 400;
httpRes.ContentType = "text/plain";
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await Write(httpRes, "Invalid host").ConfigureAwait(false);
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return;
}
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if (!ValidateRequest(remoteIp, httpReq.IsLocal))
{
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httpRes.StatusCode = 403;
httpRes.ContentType = "text/plain";
await Write(httpRes, "Forbidden").ConfigureAwait(false);
return;
}
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if (!ValidateSsl(httpReq.RemoteIp, urlString))
{
RedirectToSecureUrl(httpReq, httpRes, urlString);
return;
}
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if (string.Equals(httpReq.Verb, "OPTIONS", StringComparison.OrdinalIgnoreCase))
{
httpRes.StatusCode = 200;
httpRes.AddHeader("Access-Control-Allow-Origin", "*");
httpRes.AddHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, PATCH, OPTIONS");
httpRes.AddHeader("Access-Control-Allow-Headers", "Content-Type, Authorization, Range, X-MediaBrowser-Token, X-Emby-Authorization");
httpRes.ContentType = "text/plain";
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await Write(httpRes, string.Empty).ConfigureAwait(false);
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return;
}
urlToLog = GetUrlToLog(urlString);
Logger.LogDebug("HTTP {HttpMethod} {Url} UserAgent: {UserAgent} \nHeaders: {@Headers}", urlToLog, httpReq.UserAgent ?? string.Empty, httpReq.HttpMethod, httpReq.Headers);
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if (string.Equals(localPath, "/emby/", StringComparison.OrdinalIgnoreCase) ||
string.Equals(localPath, "/mediabrowser/", StringComparison.OrdinalIgnoreCase))
{
RedirectToUrl(httpRes, DefaultRedirectPath);
return;
}
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if (string.Equals(localPath, "/emby", StringComparison.OrdinalIgnoreCase) ||
string.Equals(localPath, "/mediabrowser", StringComparison.OrdinalIgnoreCase))
{
RedirectToUrl(httpRes, "emby/" + DefaultRedirectPath);
return;
}
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if (localPath.IndexOf("mediabrowser/web", StringComparison.OrdinalIgnoreCase) != -1)
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{
httpRes.StatusCode = 200;
httpRes.ContentType = "text/html";
var newUrl = urlString.Replace("mediabrowser", "emby", StringComparison.OrdinalIgnoreCase)
.Replace("/dashboard/", "/web/", StringComparison.OrdinalIgnoreCase);
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if (!string.Equals(newUrl, urlString, StringComparison.OrdinalIgnoreCase))
{
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await Write(httpRes,
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"<!doctype html><html><head><title>Emby</title></head><body>Please update your Emby bookmark to <a href=\"" +
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newUrl + "\">" + newUrl + "</a></body></html>").ConfigureAwait(false);
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return;
}
}
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if (localPath.IndexOf("dashboard/", StringComparison.OrdinalIgnoreCase) != -1 &&
localPath.IndexOf("web/dashboard", StringComparison.OrdinalIgnoreCase) == -1)
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{
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httpRes.StatusCode = 200;
httpRes.ContentType = "text/html";
var newUrl = urlString.Replace("mediabrowser", "emby", StringComparison.OrdinalIgnoreCase)
.Replace("/dashboard/", "/web/", StringComparison.OrdinalIgnoreCase);
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if (!string.Equals(newUrl, urlString, StringComparison.OrdinalIgnoreCase))
{
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await Write(httpRes,
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"<!doctype html><html><head><title>Emby</title></head><body>Please update your Emby bookmark to <a href=\"" +
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newUrl + "\">" + newUrl + "</a></body></html>").ConfigureAwait(false);
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return;
}
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}
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if (string.Equals(localPath, "/web", StringComparison.OrdinalIgnoreCase))
{
RedirectToUrl(httpRes, DefaultRedirectPath);
return;
}
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if (string.Equals(localPath, "/web/", StringComparison.OrdinalIgnoreCase))
{
RedirectToUrl(httpRes, "../" + DefaultRedirectPath);
return;
}
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if (string.Equals(localPath, "/", StringComparison.OrdinalIgnoreCase))
{
RedirectToUrl(httpRes, DefaultRedirectPath);
return;
}
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if (string.IsNullOrEmpty(localPath))
{
RedirectToUrl(httpRes, "/" + DefaultRedirectPath);
return;
}
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if (!string.Equals(httpReq.QueryString["r"], "0", StringComparison.OrdinalIgnoreCase))
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{
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if (localPath.EndsWith("web/dashboard.html", StringComparison.OrdinalIgnoreCase))
{
RedirectToUrl(httpRes, "index.html#!/dashboard.html");
}
if (localPath.EndsWith("web/home.html", StringComparison.OrdinalIgnoreCase))
{
RedirectToUrl(httpRes, "index.html");
}
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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
if (localPath.IndexOf("system/ping", StringComparison.OrdinalIgnoreCase) == -1)
{
httpRes.StatusCode = 503;
httpRes.ContentType = "text/html";
await Write(httpRes, GlobalResponse).ConfigureAwait(false);
return;
}
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}
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var handler = GetServiceHandler(httpReq);
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if (handler != null)
{
await handler.ProcessRequestAsync(this, httpReq, httpRes, Logger, httpReq.OperationName, cancellationToken).ConfigureAwait(false);
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}
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else
{
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await ErrorHandler(new FileNotFoundException(), httpReq, false, false).ConfigureAwait(false);
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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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{
await ErrorHandler(ex, httpReq, false, false).ConfigureAwait(false);
}
catch (SecurityException ex)
{
await ErrorHandler(ex, httpReq, false, true).ConfigureAwait(false);
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}
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catch (Exception ex)
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{
var logException = !string.Equals(ex.GetType().Name, "SocketException", StringComparison.OrdinalIgnoreCase);
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await ErrorHandler(ex, httpReq, logException, false).ConfigureAwait(false);
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}
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finally
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{
stopWatch.Stop();
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);
}
else
{
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Logger.LogDebug("HTTP Response {StatusCode} to {RemoteIp}. Time: {Elapsed:g}. {Url}", httpRes.StatusCode, remoteIp, elapsed, urlToLog);
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}
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}
}
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// Entry point for HttpListener
public ServiceHandler GetServiceHandler(IHttpRequest httpReq)
{
var pathInfo = httpReq.PathInfo;
var pathParts = pathInfo.TrimStart('/').Split('/');
if (pathParts.Length == 0)
{
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Logger.LogError("Path parts empty for PathInfo: {PathInfo}, Url: {RawUrl}", pathInfo, httpReq.RawUrl);
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return null;
}
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var restPath = ServiceHandler.FindMatchingRestPath(httpReq.HttpMethod, pathInfo, out string contentType);
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if (restPath != null)
{
return new ServiceHandler
{
RestPath = restPath,
ResponseContentType = contentType
};
}
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Logger.LogError("Could not find handler for {PathInfo}", pathInfo);
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return null;
}
private static Task Write(IResponse response, string text)
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{
var bOutput = Encoding.UTF8.GetBytes(text);
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return response.OutputStream.WriteAsync(bOutput, 0, bOutput.Length);
}
private void RedirectToSecureUrl(IHttpRequest httpReq, IResponse httpRes, string url)
{
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if (Uri.TryCreate(url, UriKind.Absolute, out Uri uri))
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{
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var builder = new UriBuilder(uri)
{
Port = _config.Configuration.PublicHttpsPort,
Scheme = "https"
};
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url = builder.Uri.ToString();
RedirectToUrl(httpRes, url);
}
else
{
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// TODO what is this?
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var httpsUrl = url
.Replace("http://", "https://", StringComparison.OrdinalIgnoreCase)
.Replace(":" + _config.Configuration.PublicPort.ToString(CultureInfo.InvariantCulture), ":" + _config.Configuration.PublicHttpsPort.ToString(CultureInfo.InvariantCulture), StringComparison.OrdinalIgnoreCase);
RedirectToUrl(httpRes, url);
}
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}
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public static void RedirectToUrl(IResponse httpRes, string url)
{
httpRes.StatusCode = 302;
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httpRes.AddHeader("Location", url);
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}
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public ServiceController ServiceController { get; private set; }
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/// <summary>
/// Adds the rest handlers.
/// </summary>
/// <param name="services">The services.</param>
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/// <param name="listeners"></param>
/// <param name="urlPrefixes"></param>
public void Init(IEnumerable<IService> services, IEnumerable<IWebSocketListener> listeners, IEnumerable<string> urlPrefixes)
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{
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_webSocketListeners = listeners.ToArray();
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UrlPrefixes = urlPrefixes.ToArray();
ServiceController = new ServiceController();
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Logger.LogInformation("Calling ServiceStack AppHost.Init");
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var types = services.Select(r => r.GetType()).ToArray();
ServiceController.Init(this, types);
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ResponseFilters = new Action<IRequest, IResponse, object>[]
{
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new ResponseFilter(Logger).FilterResponse
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};
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}
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public RouteAttribute[] GetRouteAttributes(Type requestType)
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{
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var routes = requestType.GetTypeInfo().GetCustomAttributes<RouteAttribute>(true).ToList();
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var clone = routes.ToList();
foreach (var route in clone)
{
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routes.Add(new RouteAttribute(NormalizeEmbyRoutePath(route.Path), route.Verbs)
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{
Notes = route.Notes,
Priority = route.Priority,
Summary = route.Summary
});
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routes.Add(new RouteAttribute(NormalizeMediaBrowserRoutePath(route.Path), route.Verbs)
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{
Notes = route.Notes,
Priority = route.Priority,
Summary = route.Summary
});
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// needed because apps add /emby, and some users also add /emby, thereby double prefixing
routes.Add(new RouteAttribute(DoubleNormalizeEmbyRoutePath(route.Path), route.Verbs)
{
Notes = route.Notes,
Priority = route.Priority,
Summary = route.Summary
});
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}
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return routes.ToArray();
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}
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public Func<string, object> GetParseFn(Type propertyType)
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{
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return _funcParseFn(propertyType);
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}
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public void SerializeToJson(object o, Stream stream)
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{
_jsonSerializer.SerializeToStream(o, stream);
}
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public void SerializeToXml(object o, Stream stream)
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{
_xmlSerializer.SerializeToStream(o, stream);
}
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public Task<object> DeserializeXml(Type type, Stream stream)
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{
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return Task.FromResult(_xmlSerializer.DeserializeFromStream(type, stream));
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}
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public Task<object> DeserializeJson(Type type, Stream stream)
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{
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return _jsonSerializer.DeserializeFromStreamAsync(stream, type);
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}
public Task ProcessWebSocketRequest(HttpContext context)
{
return _socketListener.ProcessWebSocketRequest(context);
}
//TODO Add Jellyfin Route Path Normalizer
private static string NormalizeEmbyRoutePath(string path)
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{
if (path.StartsWith("/", StringComparison.OrdinalIgnoreCase))
{
return "/emby" + path;
}
return "emby/" + path;
}
private static string NormalizeMediaBrowserRoutePath(string path)
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{
if (path.StartsWith("/", StringComparison.OrdinalIgnoreCase))
{
return "/mediabrowser" + path;
}
return "mediabrowser/" + path;
}
private static string DoubleNormalizeEmbyRoutePath(string path)
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{
if (path.StartsWith("/", StringComparison.OrdinalIgnoreCase))
{
return "/emby/emby" + path;
}
return "emby/emby/" + path;
}
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private bool _disposed;
private readonly object _disposeLock = new object();
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protected virtual void Dispose(bool disposing)
{
if (_disposed) return;
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lock (_disposeLock)
{
if (_disposed) return;
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_disposed = true;
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if (disposing)
{
Stop();
}
}
}
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/// <summary>
/// Processes the web socket message received.
/// </summary>
/// <param name="result">The result.</param>
private Task ProcessWebSocketMessageReceived(WebSocketMessageInfo result)
{
if (_disposed)
{
return Task.CompletedTask;
}
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Logger.LogDebug("Websocket message received: {0}", result.MessageType);
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var tasks = _webSocketListeners.Select(i => Task.Run(async () =>
{
try
{
await i.ProcessMessage(result).ConfigureAwait(false);
}
catch (Exception ex)
{
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Logger.LogError(ex, "{0} failed processing WebSocket message {1}", i.GetType().Name, result.MessageType ?? string.Empty);
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}
}));
return Task.WhenAll(tasks);
}
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public void Dispose()
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{
Dispose(true);
}
}
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}