jellyfin/MediaBrowser.Server.Implementations/HttpServer/HttpServer.cs

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using Funq;
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using MediaBrowser.Common;
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using MediaBrowser.Common.Extensions;
using MediaBrowser.Common.Net;
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using MediaBrowser.Model.Logging;
using ServiceStack.Api.Swagger;
using ServiceStack.Common.Web;
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using ServiceStack.Configuration;
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using ServiceStack.Logging;
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using ServiceStack.ServiceHost;
using ServiceStack.ServiceInterface.Cors;
using ServiceStack.Text;
using ServiceStack.WebHost.Endpoints;
using ServiceStack.WebHost.Endpoints.Extensions;
using ServiceStack.WebHost.Endpoints.Support;
using System;
using System.Collections.Concurrent;
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;
using System.Net;
using System.Net.WebSockets;
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using System.Reactive.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
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namespace MediaBrowser.Server.Implementations.HttpServer
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{
/// <summary>
/// Class HttpServer
/// </summary>
public class HttpServer : HttpListenerBase, IHttpServer
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{
/// <summary>
/// The logger
/// </summary>
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private readonly ILogger _logger;
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/// <summary>
/// Gets the URL prefix.
/// </summary>
/// <value>The URL prefix.</value>
public string UrlPrefix { get; private set; }
/// <summary>
/// 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>
/// This subscribes to HttpListener requests and finds the appropriate BaseHandler to process it
/// </summary>
/// <value>The HTTP listener.</value>
private IDisposable HttpListener { get; set; }
/// <summary>
/// Occurs when [web socket connected].
/// </summary>
public event EventHandler<WebSocketConnectEventArgs> WebSocketConnected;
/// <summary>
/// Gets the default redirect path.
/// </summary>
/// <value>The default redirect path.</value>
private string DefaultRedirectPath { get; set; }
/// <summary>
/// Gets or sets the name of the server.
/// </summary>
/// <value>The name of the server.</value>
private string ServerName { get; set; }
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/// <summary>
/// The _container adapter
/// </summary>
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private readonly ContainerAdapter _containerAdapter;
private readonly ConcurrentDictionary<string, string> _localEndPoints = new ConcurrentDictionary<string, string>(StringComparer.OrdinalIgnoreCase);
/// <summary>
/// Gets the local end points.
/// </summary>
/// <value>The local end points.</value>
public IEnumerable<string> LocalEndPoints
{
get { return _localEndPoints.Keys.ToList(); }
}
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/// <summary>
/// Initializes a new instance of the <see cref="HttpServer" /> class.
/// </summary>
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/// <param name="applicationHost">The application host.</param>
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/// <param name="logManager">The log manager.</param>
/// <param name="serverName">Name of the server.</param>
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/// <param name="defaultRedirectpath">The default redirectpath.</param>
/// <exception cref="System.ArgumentNullException">urlPrefix</exception>
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public HttpServer(IApplicationHost applicationHost, ILogManager logManager, string serverName, string defaultRedirectpath)
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: base()
{
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if (logManager == null)
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{
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throw new ArgumentNullException("logManager");
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}
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if (applicationHost == null)
{
throw new ArgumentNullException("applicationHost");
}
if (string.IsNullOrEmpty(serverName))
{
throw new ArgumentNullException("serverName");
}
if (string.IsNullOrEmpty(defaultRedirectpath))
{
throw new ArgumentNullException("defaultRedirectpath");
}
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ServerName = serverName;
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DefaultRedirectPath = defaultRedirectpath;
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_logger = logManager.GetLogger("HttpServer");
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LogManager.LogFactory = new ServerLogFactory(logManager);
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EndpointHostConfig.Instance.ServiceStackHandlerFactoryPath = null;
EndpointHostConfig.Instance.MetadataRedirectPath = "metadata";
_containerAdapter = new ContainerAdapter(applicationHost);
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}
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/// <summary>
/// The us culture
/// </summary>
protected static readonly CultureInfo UsCulture = new CultureInfo("en-US");
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/// <summary>
/// Configures the specified container.
/// </summary>
/// <param name="container">The container.</param>
public override void Configure(Container container)
{
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JsConfig.DateHandler = JsonDateHandler.ISO8601;
JsConfig.ExcludeTypeInfo = true;
JsConfig.IncludeNullValues = false;
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SetConfig(new EndpointHostConfig
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{
DefaultRedirectPath = DefaultRedirectPath,
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MapExceptionToStatusCode = {
{ typeof(InvalidOperationException), 422 },
{ typeof(ResourceNotFoundException), 404 },
{ typeof(FileNotFoundException), 404 },
{ typeof(DirectoryNotFoundException), 404 }
},
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DebugMode = true,
ServiceName = ServerName,
LogFactory = LogManager.LogFactory,
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// The Markdown feature causes slow startup times (5 mins+) on cold boots for some users
// Custom format allows images
EnableFeatures = Feature.Csv | Feature.Html | Feature.Json | Feature.Jsv | Feature.Metadata | Feature.Xml | Feature.CustomFormat
});
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container.Adapter = _containerAdapter;
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Plugins.Add(new SwaggerFeature());
Plugins.Add(new CorsFeature());
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ResponseFilters.Add(FilterResponse);
}
/// <summary>
/// Filters the response.
/// </summary>
/// <param name="req">The req.</param>
/// <param name="res">The res.</param>
/// <param name="dto">The dto.</param>
private void FilterResponse(IHttpRequest req, IHttpResponse res, object dto)
{
// Try to prevent compatibility view
res.AddHeader("X-UA-Compatible", "IE=Edge");
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var exception = dto as Exception;
if (exception != null)
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{
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_logger.ErrorException("Error processing request for {0}", exception, req.RawUrl);
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if (!string.IsNullOrEmpty(exception.Message))
{
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var error = exception.Message.Replace(Environment.NewLine, " ");
error = RemoveControlCharacters(error);
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res.AddHeader("X-Application-Error-Code", error);
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}
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}
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if (dto is CompressedResult)
{
// Per Google PageSpeed
// This instructs the proxies to cache two versions of the resource: one compressed, and one uncompressed.
// The correct version of the resource is delivered based on the client request header.
// This is a good choice for applications that are singly homed and depend on public proxies for user locality.
res.AddHeader("Vary", "Accept-Encoding");
}
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var hasOptions = dto as IHasOptions;
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if (hasOptions != null)
{
// Content length has to be explicitly set on on HttpListenerResponse or it won't be happy
string contentLength;
if (hasOptions.Options.TryGetValue("Content-Length", out contentLength) && !string.IsNullOrEmpty(contentLength))
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{
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var length = long.Parse(contentLength, UsCulture);
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if (length > 0)
{
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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
// anytime we know the content length there's no need for it
response.SendChunked = false;
}
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}
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}
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}
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/// <summary>
/// Removes the control characters.
/// </summary>
/// <param name="inString">The in string.</param>
/// <returns>System.String.</returns>
private static string RemoveControlCharacters(string inString)
{
if (inString == null) return null;
var newString = new StringBuilder();
foreach (var ch in inString)
{
if (!char.IsControl(ch))
{
newString.Append(ch);
}
}
return newString.ToString();
}
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/// <summary>
/// Starts the Web Service
/// </summary>
/// <param name="urlBase">A Uri that acts as the base that the server is listening on.
/// Format should be: http://127.0.0.1:8080/ or http://127.0.0.1:8080/somevirtual/
/// Note: the trailing slash is required! For more info see the
/// 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)
{
if (string.IsNullOrEmpty(urlBase))
{
throw new ArgumentNullException("urlBase");
}
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// *** Already running - just leave it in place
if (IsStarted)
{
return;
}
if (Listener == null)
{
_logger.Info("Creating HttpListner");
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Listener = new HttpListener();
}
EndpointHost.Config.ServiceStackHandlerFactoryPath = HttpListenerRequestWrapper.GetHandlerPathIfAny(urlBase);
UrlPrefix = urlBase;
_logger.Info("Adding HttpListener Prefixes");
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Listener.Prefixes.Add(urlBase);
IsStarted = true;
_logger.Info("Starting HttpListner");
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Listener.Start();
_logger.Info("Creating HttpListner observable stream");
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HttpListener = CreateObservableStream().Subscribe(ProcessHttpRequestAsync);
}
/// <summary>
/// Creates the observable stream.
/// </summary>
/// <returns>IObservable{HttpListenerContext}.</returns>
private IObservable<HttpListenerContext> CreateObservableStream()
{
return Observable.Create<HttpListenerContext>(obs =>
Observable.FromAsync(() => Listener.GetContextAsync())
.Subscribe(obs))
.Repeat()
.Retry()
.Publish()
.RefCount();
}
/// <summary>
/// Processes incoming http requests by routing them to the appropiate handler
/// </summary>
/// <param name="context">The CTX.</param>
private async void ProcessHttpRequestAsync(HttpListenerContext context)
{
var date = DateTime.Now;
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LogHttpRequest(context);
if (context.Request.IsWebSocketRequest)
{
await ProcessWebSocketRequest(context).ConfigureAwait(false);
return;
}
var localPath = context.Request.Url.LocalPath;
if (string.Equals(localPath, "/mediabrowser/", StringComparison.OrdinalIgnoreCase))
{
context.Response.Redirect(DefaultRedirectPath);
context.Response.Close();
return;
}
if (string.Equals(localPath, "/mediabrowser", StringComparison.OrdinalIgnoreCase))
{
context.Response.Redirect("mediabrowser/" + DefaultRedirectPath);
context.Response.Close();
return;
}
if (string.Equals(localPath, "/", StringComparison.OrdinalIgnoreCase))
{
context.Response.Redirect("mediabrowser/" + DefaultRedirectPath);
context.Response.Close();
return;
}
if (string.IsNullOrEmpty(localPath))
{
context.Response.Redirect("/mediabrowser/" + DefaultRedirectPath);
context.Response.Close();
return;
}
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RaiseReceiveWebRequest(context);
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await Task.Factory.StartNew(() =>
{
try
{
var url = context.Request.Url.ToString();
var endPoint = context.Request.RemoteEndPoint;
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ProcessRequest(context);
var duration = DateTime.Now - date;
LogResponse(context, url, endPoint, duration);
}
catch (Exception ex)
{
_logger.ErrorException("ProcessRequest failure", ex);
}
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}).ConfigureAwait(false);
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}
/// <summary>
/// Processes the web socket request.
/// </summary>
/// <param name="ctx">The CTX.</param>
/// <returns>Task.</returns>
private async Task ProcessWebSocketRequest(HttpListenerContext ctx)
{
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#if __MonoCS__
#else
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try
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{
var webSocketContext = await ctx.AcceptWebSocketAsync(null).ConfigureAwait(false);
if (WebSocketConnected != null)
{
WebSocketConnected(this, new WebSocketConnectEventArgs { WebSocket = new NativeWebSocket(webSocketContext.WebSocket, _logger), Endpoint = ctx.Request.RemoteEndPoint.ToString() });
}
}
catch (Exception ex)
{
_logger.ErrorException("AcceptWebSocketAsync error", ex);
ctx.Response.StatusCode = 500;
ctx.Response.Close();
}
#endif
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}
/// <summary>
/// Logs the HTTP request.
/// </summary>
/// <param name="ctx">The CTX.</param>
private void LogHttpRequest(HttpListenerContext ctx)
{
var endpoint = ctx.Request.LocalEndPoint;
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if (endpoint != null)
{
var address = endpoint.ToString();
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_localEndPoints.GetOrAdd(address, address);
}
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if (EnableHttpRequestLogging)
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{
var log = new StringBuilder();
log.AppendLine("Url: " + ctx.Request.Url);
log.AppendLine("Headers: " + string.Join(",", ctx.Request.Headers.AllKeys.Select(k => k + "=" + ctx.Request.Headers[k])));
var type = ctx.Request.IsWebSocketRequest ? "Web Socket" : "HTTP " + ctx.Request.HttpMethod;
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_logger.LogMultiline(type + " request received from " + ctx.Request.RemoteEndPoint, LogSeverity.Debug, log);
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}
}
/// <summary>
/// Overridable method that can be used to implement a custom hnandler
/// </summary>
/// <param name="context">The context.</param>
/// <exception cref="System.NotImplementedException">Cannot execute handler: + handler + at PathInfo: + httpReq.PathInfo</exception>
protected override void ProcessRequest(HttpListenerContext context)
{
if (string.IsNullOrEmpty(context.Request.RawUrl)) return;
var operationName = context.Request.GetOperationName();
var httpReq = new HttpListenerRequestWrapper(operationName, context.Request);
var httpRes = new HttpListenerResponseWrapper(context.Response);
var handler = ServiceStackHttpHandlerFactory.GetHandler(httpReq);
var serviceStackHandler = handler as IServiceStackHttpHandler;
if (serviceStackHandler != null)
{
var restHandler = serviceStackHandler as RestHandler;
if (restHandler != null)
{
httpReq.OperationName = operationName = restHandler.RestPath.RequestType.Name;
}
serviceStackHandler.ProcessRequest(httpReq, httpRes, operationName);
return;
}
throw new NotImplementedException("Cannot execute handler: " + handler + " at PathInfo: " + httpReq.PathInfo);
}
/// <summary>
/// Logs the response.
/// </summary>
/// <param name="ctx">The CTX.</param>
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/// <param name="url">The URL.</param>
/// <param name="endPoint">The end point.</param>
/// <param name="duration">The duration.</param>
private void LogResponse(HttpListenerContext ctx, string url, IPEndPoint endPoint, TimeSpan duration)
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{
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if (!EnableHttpRequestLogging)
{
return;
}
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var statusCode = 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])));
var responseTime = string.Format(". Response time: {0} ms", duration.TotalMilliseconds);
var msg = "Response code " + statusCode + " sent to " + endPoint + responseTime;
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_logger.LogMultiline(msg, LogSeverity.Debug, log);
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}
/// <summary>
/// Creates the service manager.
/// </summary>
/// <param name="assembliesWithServices">The assemblies with services.</param>
/// <returns>ServiceManager.</returns>
protected override ServiceManager CreateServiceManager(params Assembly[] assembliesWithServices)
{
var types = _restServices.Select(r => r.GetType()).ToArray();
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return new ServiceManager(new Container(), new ServiceController(() => types));
}
/// <summary>
/// Shut down the Web Service
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/// </summary>
public override void Stop()
{
if (HttpListener != null)
{
HttpListener.Dispose();
HttpListener = null;
}
if (Listener != null)
{
Listener.Prefixes.Remove(UrlPrefix);
}
base.Stop();
}
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/// <summary>
/// The _supports native web socket
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/// </summary>
private bool? _supportsNativeWebSocket;
/// <summary>
/// Gets a value indicating whether [supports web sockets].
/// </summary>
/// <value><c>true</c> if [supports web sockets]; otherwise, <c>false</c>.</value>
public bool SupportsWebSockets
{
get
{
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#if __MonoCS__
return false;
#else
#endif
if (!_supportsNativeWebSocket.HasValue)
{
try
{
new ClientWebSocket();
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_supportsNativeWebSocket = true;
}
catch (PlatformNotSupportedException)
{
_supportsNativeWebSocket = false;
}
}
return _supportsNativeWebSocket.Value;
}
}
/// <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; }
/// <summary>
/// Adds the rest handlers.
/// </summary>
/// <param name="services">The services.</param>
public void Init(IEnumerable<IRestfulService> services)
{
_restServices.AddRange(services);
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_logger.Info("Calling EndpointHost.ConfigureHost");
EndpointHost.ConfigureHost(this, ServerName, CreateServiceManager());
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_logger.Info("Calling ServiceStack AppHost.Init");
Init();
}
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/// <summary>
/// Releases the specified instance.
/// </summary>
/// <param name="instance">The instance.</param>
public override void Release(object instance)
{
// Leave this empty so SS doesn't try to dispose our objects
}
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}
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/// <summary>
/// Class ContainerAdapter
/// </summary>
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class ContainerAdapter : IContainerAdapter, IRelease
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{
/// <summary>
/// The _app host
/// </summary>
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private readonly IApplicationHost _appHost;
/// <summary>
/// Initializes a new instance of the <see cref="ContainerAdapter" /> class.
/// </summary>
/// <param name="appHost">The app host.</param>
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public ContainerAdapter(IApplicationHost appHost)
{
_appHost = appHost;
}
/// <summary>
/// Resolves this instance.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <returns>``0.</returns>
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public T Resolve<T>()
{
return _appHost.Resolve<T>();
}
/// <summary>
/// Tries the resolve.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <returns>``0.</returns>
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public T TryResolve<T>()
{
return _appHost.TryResolve<T>();
}
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/// <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
}
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}
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}