631 lines
22 KiB
C#
631 lines
22 KiB
C#
// ***********************************************************************
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// Assembly : MediaBrowser.Server.Implementations
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// Author : Luke
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// Created : 03-06-2013
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//
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// Last Modified By : Luke
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// Last Modified On : 03-24-2013
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// ***********************************************************************
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// <copyright file="HttpServer.cs" company="">
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// Copyright (c) . All rights reserved.
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// </copyright>
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// <summary></summary>
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// ***********************************************************************
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using Funq;
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using MediaBrowser.Common;
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using MediaBrowser.Common.Extensions;
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using MediaBrowser.Common.Net;
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using MediaBrowser.Model.Logging;
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using MediaBrowser.Model.Serialization;
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using ServiceStack.Api.Swagger;
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using ServiceStack.Common.Web;
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using ServiceStack.Configuration;
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using ServiceStack.Logging.NLogger;
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using ServiceStack.ServiceHost;
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using ServiceStack.ServiceInterface.Cors;
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using ServiceStack.Text;
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using ServiceStack.WebHost.Endpoints;
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using ServiceStack.WebHost.Endpoints.Extensions;
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using ServiceStack.WebHost.Endpoints.Support;
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using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.IO;
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using System.Linq;
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using System.Net;
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using System.Net.WebSockets;
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using System.Reactive.Linq;
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using System.Reflection;
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using System.Text;
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using System.Threading.Tasks;
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namespace MediaBrowser.Server.Implementations.HttpServer
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{
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/// <summary>
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/// Class HttpServer
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/// </summary>
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public class HttpServer : HttpListenerBase, IHttpServer
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{
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/// <summary>
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/// The logger
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/// </summary>
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private readonly ILogger _logger;
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/// <summary>
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/// Gets the URL prefix.
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/// </summary>
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/// <value>The URL prefix.</value>
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public string UrlPrefix { get; private set; }
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/// <summary>
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/// The _rest services
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/// </summary>
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private readonly List<IRestfulService> _restServices = new List<IRestfulService>();
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/// <summary>
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/// Gets or sets the application host.
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/// </summary>
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/// <value>The application host.</value>
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private IApplicationHost ApplicationHost { get; set; }
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/// <summary>
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/// This subscribes to HttpListener requests and finds the appropriate BaseHandler to process it
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/// </summary>
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/// <value>The HTTP listener.</value>
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private IDisposable HttpListener { get; set; }
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/// <summary>
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/// Gets or sets the protobuf serializer.
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/// </summary>
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/// <value>The protobuf serializer.</value>
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private IProtobufSerializer ProtobufSerializer { get; set; }
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/// <summary>
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/// Occurs when [web socket connected].
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/// </summary>
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public event EventHandler<WebSocketConnectEventArgs> WebSocketConnected;
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/// <summary>
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/// Gets the default redirect path.
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/// </summary>
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/// <value>The default redirect path.</value>
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private string DefaultRedirectPath { get; set; }
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/// <summary>
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/// Gets or sets the name of the server.
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/// </summary>
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/// <value>The name of the server.</value>
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private string ServerName { get; set; }
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/// <summary>
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/// Initializes a new instance of the <see cref="HttpServer" /> class.
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/// </summary>
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/// <param name="applicationHost">The application host.</param>
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/// <param name="protobufSerializer">The protobuf serializer.</param>
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/// <param name="logger">The logger.</param>
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/// <param name="serverName">Name of the server.</param>
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/// <param name="defaultRedirectpath">The default redirectpath.</param>
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/// <exception cref="System.ArgumentNullException">urlPrefix</exception>
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public HttpServer(IApplicationHost applicationHost, IProtobufSerializer protobufSerializer, ILogger logger, string serverName, string defaultRedirectpath)
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: base()
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{
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if (protobufSerializer == null)
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{
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throw new ArgumentNullException("protobufSerializer");
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}
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if (logger == null)
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{
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throw new ArgumentNullException("logger");
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}
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if (applicationHost == null)
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{
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throw new ArgumentNullException("applicationHost");
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}
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if (string.IsNullOrEmpty(serverName))
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{
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throw new ArgumentNullException("serverName");
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}
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if (string.IsNullOrEmpty(defaultRedirectpath))
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{
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throw new ArgumentNullException("defaultRedirectpath");
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}
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ServerName = serverName;
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DefaultRedirectPath = defaultRedirectpath;
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ProtobufSerializer = protobufSerializer;
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_logger = logger;
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ApplicationHost = applicationHost;
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EndpointHostConfig.Instance.ServiceStackHandlerFactoryPath = null;
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EndpointHostConfig.Instance.MetadataRedirectPath = "metadata";
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}
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/// <summary>
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/// Configures the specified container.
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/// </summary>
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/// <param name="container">The container.</param>
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public override void Configure(Container container)
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{
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JsConfig.DateHandler = JsonDateHandler.ISO8601;
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JsConfig.ExcludeTypeInfo = true;
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JsConfig.IncludeNullValues = false;
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SetConfig(new EndpointHostConfig
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{
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DefaultRedirectPath = DefaultRedirectPath,
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// Tell SS to bubble exceptions up to here
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WriteErrorsToResponse = false
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});
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container.Adapter = new ContainerAdapter(ApplicationHost);
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Plugins.Add(new SwaggerFeature());
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Plugins.Add(new CorsFeature());
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ServiceStack.Logging.LogManager.LogFactory = new NLogFactory();
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ResponseFilters.Add((req, res, dto) =>
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{
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var exception = dto as Exception;
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if (exception != null)
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{
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_logger.ErrorException("Error processing request", exception);
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if (!string.IsNullOrEmpty(exception.Message))
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{
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res.AddHeader("X-Application-Error-Code", exception.Message.Replace(Environment.NewLine, " "));
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}
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}
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if (dto is CompressedResult)
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{
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// Per Google PageSpeed
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// This instructs the proxies to cache two versions of the resource: one compressed, and one uncompressed.
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// The correct version of the resource is delivered based on the client request header.
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// This is a good choice for applications that are singly homed and depend on public proxies for user locality.
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res.AddHeader("Vary", "Accept-Encoding");
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}
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var hasOptions = dto as IHasOptions;
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if (hasOptions != null)
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{
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// Content length has to be explicitly set on on HttpListenerResponse or it won't be happy
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string contentLength;
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if (hasOptions.Options.TryGetValue("Content-Length", out contentLength) && !string.IsNullOrEmpty(contentLength))
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{
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var length = long.Parse(contentLength);
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if (length > 0)
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{
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var response = (HttpListenerResponse) res.OriginalResponse;
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response.ContentLength64 = length;
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// Disable chunked encoding. Technically this is only needed when using Content-Range, but
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// anytime we know the content length there's no need for it
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response.SendChunked = false;
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}
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}
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}
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});
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}
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/// <summary>
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/// Starts the Web Service
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/// </summary>
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/// <param name="urlBase">A Uri that acts as the base that the server is listening on.
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/// Format should be: http://127.0.0.1:8080/ or http://127.0.0.1:8080/somevirtual/
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/// Note: the trailing slash is required! For more info see the
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/// HttpListener.Prefixes property on MSDN.</param>
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/// <exception cref="System.ArgumentNullException">urlBase</exception>
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public override void Start(string urlBase)
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{
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if (string.IsNullOrEmpty(urlBase))
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{
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throw new ArgumentNullException("urlBase");
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}
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// *** Already running - just leave it in place
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if (IsStarted)
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{
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return;
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}
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if (Listener == null)
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{
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Listener = new HttpListener();
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}
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EndpointHost.Config.ServiceStackHandlerFactoryPath = HttpListenerRequestWrapper.GetHandlerPathIfAny(urlBase);
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UrlPrefix = urlBase;
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Listener.Prefixes.Add(urlBase);
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IsStarted = true;
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Listener.Start();
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HttpListener = CreateObservableStream().Subscribe(ProcessHttpRequestAsync);
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}
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/// <summary>
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/// Creates the observable stream.
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/// </summary>
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/// <returns>IObservable{HttpListenerContext}.</returns>
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private IObservable<HttpListenerContext> CreateObservableStream()
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{
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return Observable.Create<HttpListenerContext>(obs =>
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Observable.FromAsync(() => Listener.GetContextAsync())
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.Subscribe(obs))
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.Repeat()
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.Retry()
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.Publish()
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.RefCount();
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}
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/// <summary>
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/// Processes incoming http requests by routing them to the appropiate handler
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/// </summary>
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/// <param name="context">The CTX.</param>
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private async void ProcessHttpRequestAsync(HttpListenerContext context)
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{
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LogHttpRequest(context);
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if (context.Request.IsWebSocketRequest)
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{
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await ProcessWebSocketRequest(context).ConfigureAwait(false);
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return;
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}
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Task.Run(() =>
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{
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RaiseReceiveWebRequest(context);
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try
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{
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ProcessRequest(context);
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}
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catch (InvalidOperationException ex)
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{
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HandleException(context.Response, ex, 422);
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throw;
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}
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catch (ResourceNotFoundException ex)
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{
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HandleException(context.Response, ex, 404);
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throw;
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}
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catch (FileNotFoundException ex)
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{
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HandleException(context.Response, ex, 404);
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throw;
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}
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catch (DirectoryNotFoundException ex)
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{
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HandleException(context.Response, ex, 404);
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throw;
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}
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catch (UnauthorizedAccessException ex)
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{
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HandleException(context.Response, ex, 401);
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throw;
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}
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catch (ArgumentException ex)
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{
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HandleException(context.Response, ex, 400);
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throw;
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}
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catch (Exception ex)
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{
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HandleException(context.Response, ex, 500);
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throw;
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}
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});
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}
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/// <summary>
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/// Processes the web socket request.
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/// </summary>
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/// <param name="ctx">The CTX.</param>
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/// <returns>Task.</returns>
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private async Task ProcessWebSocketRequest(HttpListenerContext ctx)
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{
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try
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{
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var webSocketContext = await ctx.AcceptWebSocketAsync(null).ConfigureAwait(false);
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if (WebSocketConnected != null)
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{
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WebSocketConnected(this, new WebSocketConnectEventArgs { WebSocket = new NativeWebSocket(webSocketContext.WebSocket, _logger), Endpoint = ctx.Request.RemoteEndPoint.ToString() });
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}
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}
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catch (Exception ex)
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{
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_logger.ErrorException("AcceptWebSocketAsync error", ex);
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ctx.Response.StatusCode = 500;
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ctx.Response.Close();
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}
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}
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/// <summary>
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/// Logs the HTTP request.
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/// </summary>
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/// <param name="ctx">The CTX.</param>
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private void LogHttpRequest(HttpListenerContext ctx)
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{
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var log = new StringBuilder();
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log.AppendLine("Url: " + ctx.Request.Url);
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log.AppendLine("Headers: " + string.Join(",", ctx.Request.Headers.AllKeys.Select(k => k + "=" + ctx.Request.Headers[k])));
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var type = ctx.Request.IsWebSocketRequest ? "Web Socket" : "HTTP " + ctx.Request.HttpMethod;
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if (EnableHttpRequestLogging)
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{
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_logger.LogMultiline(type + " request received from " + ctx.Request.RemoteEndPoint, LogSeverity.Debug, log);
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}
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}
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/// <summary>
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/// Appends the error message.
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/// </summary>
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/// <param name="response">The response.</param>
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/// <param name="ex">The ex.</param>
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/// <param name="statusCode">The status code.</param>
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private void HandleException(HttpListenerResponse response, Exception ex, int statusCode)
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{
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_logger.ErrorException("Error processing request", ex);
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response.StatusCode = statusCode;
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response.Headers.Add("Status", statusCode.ToString(new CultureInfo("en-US")));
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response.Headers.Remove("Age");
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response.Headers.Remove("Expires");
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response.Headers.Remove("Cache-Control");
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response.Headers.Remove("Etag");
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response.Headers.Remove("Last-Modified");
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response.ContentType = "text/plain";
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if (!string.IsNullOrEmpty(ex.Message))
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{
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response.AddHeader("X-Application-Error-Code", ex.Message);
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}
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// This could fail, but try to add the stack trace as the body content
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try
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{
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var sb = new StringBuilder();
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sb.AppendLine("{");
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sb.AppendLine("\"ResponseStatus\":{");
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sb.AppendFormat(" \"ErrorCode\":{0},\n", ex.GetType().Name.EncodeJson());
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sb.AppendFormat(" \"Message\":{0},\n", ex.Message.EncodeJson());
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sb.AppendFormat(" \"StackTrace\":{0}\n", ex.StackTrace.EncodeJson());
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sb.AppendLine("}");
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sb.AppendLine("}");
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response.StatusCode = 500;
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response.ContentType = ContentType.Json;
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var sbBytes = sb.ToString().ToUtf8Bytes();
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response.OutputStream.Write(sbBytes, 0, sbBytes.Length);
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response.Close();
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}
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catch (Exception errorEx)
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{
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_logger.ErrorException("Error processing failed request", errorEx);
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}
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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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/// <param name="context">The context.</param>
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/// <exception cref="System.NotImplementedException">Cannot execute handler: + handler + at PathInfo: + httpReq.PathInfo</exception>
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protected override void ProcessRequest(HttpListenerContext context)
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{
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if (string.IsNullOrEmpty(context.Request.RawUrl)) return;
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var operationName = context.Request.GetOperationName();
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var httpReq = new HttpListenerRequestWrapper(operationName, context.Request);
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var httpRes = new HttpListenerResponseWrapper(context.Response);
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var handler = ServiceStackHttpHandlerFactory.GetHandler(httpReq);
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var url = context.Request.Url.ToString();
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var endPoint = context.Request.RemoteEndPoint;
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var serviceStackHandler = handler as IServiceStackHttpHandler;
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if (serviceStackHandler != null)
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{
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var restHandler = serviceStackHandler as RestHandler;
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if (restHandler != null)
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{
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httpReq.OperationName = operationName = restHandler.RestPath.RequestType.Name;
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}
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serviceStackHandler.ProcessRequest(httpReq, httpRes, operationName);
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LogResponse(context, url, endPoint);
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httpRes.Close();
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return;
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}
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throw new NotImplementedException("Cannot execute handler: " + handler + " at PathInfo: " + httpReq.PathInfo);
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}
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/// <summary>
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/// Logs the response.
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/// </summary>
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/// <param name="ctx">The CTX.</param>
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/// <param name="url">The URL.</param>
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/// <param name="endPoint">The end point.</param>
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private void LogResponse(HttpListenerContext ctx, string url, IPEndPoint endPoint)
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{
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if (!EnableHttpRequestLogging)
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{
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return;
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}
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var statusode = ctx.Response.StatusCode;
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var log = new StringBuilder();
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log.AppendLine(string.Format("Url: {0}", url));
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log.AppendLine("Headers: " + string.Join(",", ctx.Response.Headers.AllKeys.Select(k => k + "=" + ctx.Response.Headers[k])));
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var msg = "Http Response Sent (" + statusode + ") to " + endPoint;
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_logger.LogMultiline(msg, LogSeverity.Debug, log);
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}
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/// <summary>
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/// Creates the service manager.
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/// </summary>
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/// <param name="assembliesWithServices">The assemblies with services.</param>
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/// <returns>ServiceManager.</returns>
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protected override ServiceManager CreateServiceManager(params Assembly[] assembliesWithServices)
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{
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var types = _restServices.Select(r => r.GetType()).ToArray();
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return new ServiceManager(new Container(), new ServiceController(() => types));
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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 override void Stop()
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{
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if (HttpListener != null)
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{
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HttpListener.Dispose();
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HttpListener = null;
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}
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if (Listener != null)
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{
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Listener.Prefixes.Remove(UrlPrefix);
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}
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base.Stop();
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}
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|
|
/// <summary>
|
|
/// The _supports native web socket
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/// </summary>
|
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private bool? _supportsNativeWebSocket;
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|
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/// <summary>
|
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/// Gets a value indicating whether [supports web sockets].
|
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/// </summary>
|
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/// <value><c>true</c> if [supports web sockets]; otherwise, <c>false</c>.</value>
|
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public bool SupportsWebSockets
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{
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get
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|
{
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if (!_supportsNativeWebSocket.HasValue)
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{
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try
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{
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new ClientWebSocket();
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_supportsNativeWebSocket = true;
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}
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catch (PlatformNotSupportedException)
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{
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_supportsNativeWebSocket = false;
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}
|
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}
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return _supportsNativeWebSocket.Value;
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}
|
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}
|
|
|
|
|
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/// <summary>
|
|
/// Gets or sets a value indicating whether [enable HTTP request logging].
|
|
/// </summary>
|
|
/// <value><c>true</c> if [enable HTTP request logging]; otherwise, <c>false</c>.</value>
|
|
public bool EnableHttpRequestLogging { get; set; }
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|
|
/// <summary>
|
|
/// Adds the rest handlers.
|
|
/// </summary>
|
|
/// <param name="services">The services.</param>
|
|
public void Init(IEnumerable<IRestfulService> services)
|
|
{
|
|
_restServices.AddRange(services);
|
|
|
|
_logger.Info("Calling EndpointHost.ConfigureHost");
|
|
EndpointHost.ConfigureHost(this, ServerName, CreateServiceManager());
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|
|
_logger.Info("Registering protobuf as a content type filter");
|
|
ContentTypeFilters.Register(ContentType.ProtoBuf, (reqCtx, res, stream) => ProtobufSerializer.SerializeToStream(res, stream), (type, stream) => ProtobufSerializer.DeserializeFromStream(stream, type));
|
|
|
|
_logger.Info("Calling ServiceStack AppHost.Init");
|
|
Init();
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Class ContainerAdapter
|
|
/// </summary>
|
|
class ContainerAdapter : IContainerAdapter, IRelease
|
|
{
|
|
/// <summary>
|
|
/// The _app host
|
|
/// </summary>
|
|
private readonly IApplicationHost _appHost;
|
|
|
|
/// <summary>
|
|
/// Initializes a new instance of the <see cref="ContainerAdapter" /> class.
|
|
/// </summary>
|
|
/// <param name="appHost">The app host.</param>
|
|
public ContainerAdapter(IApplicationHost appHost)
|
|
{
|
|
_appHost = appHost;
|
|
}
|
|
/// <summary>
|
|
/// Resolves this instance.
|
|
/// </summary>
|
|
/// <typeparam name="T"></typeparam>
|
|
/// <returns>``0.</returns>
|
|
public T Resolve<T>()
|
|
{
|
|
return _appHost.Resolve<T>();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Tries the resolve.
|
|
/// </summary>
|
|
/// <typeparam name="T"></typeparam>
|
|
/// <returns>``0.</returns>
|
|
public T TryResolve<T>()
|
|
{
|
|
return _appHost.TryResolve<T>();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Releases the specified instance.
|
|
/// </summary>
|
|
/// <param name="instance">The instance.</param>
|
|
public void Release(object instance)
|
|
{
|
|
// Leave this empty so SS doesn't try to dispose our objects
|
|
}
|
|
}
|
|
} |