jellyfin-server/MediaBrowser.Server.Implementations/HttpServer/HttpServer.cs
2013-04-09 12:42:55 -04:00

631 lines
22 KiB
C#

using Funq;
using MediaBrowser.Common;
using MediaBrowser.Common.Extensions;
using MediaBrowser.Common.Net;
using MediaBrowser.Model.Logging;
using MediaBrowser.Model.Serialization;
using ServiceStack.Api.Swagger;
using ServiceStack.Common.Web;
using ServiceStack.Configuration;
using ServiceStack.Logging.NLogger;
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.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.WebSockets;
using System.Reactive.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
namespace MediaBrowser.Server.Implementations.HttpServer
{
/// <summary>
/// Class HttpServer
/// </summary>
public class HttpServer : HttpListenerBase, IHttpServer
{
/// <summary>
/// The logger
/// </summary>
private readonly ILogger _logger;
/// <summary>
/// Gets the URL prefix.
/// </summary>
/// <value>The URL prefix.</value>
public string UrlPrefix { get; private set; }
/// <summary>
/// The _rest services
/// </summary>
private readonly List<IRestfulService> _restServices = new List<IRestfulService>();
/// <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; }
private readonly ContainerAdapter _containerAdapter;
/// <summary>
/// Initializes a new instance of the <see cref="HttpServer" /> class.
/// </summary>
/// <param name="applicationHost">The application host.</param>
/// <param name="logger">The logger.</param>
/// <param name="serverName">Name of the server.</param>
/// <param name="defaultRedirectpath">The default redirectpath.</param>
/// <exception cref="System.ArgumentNullException">urlPrefix</exception>
public HttpServer(IApplicationHost applicationHost, ILogger logger, string serverName, string defaultRedirectpath)
: base()
{
if (logger == null)
{
throw new ArgumentNullException("logger");
}
if (applicationHost == null)
{
throw new ArgumentNullException("applicationHost");
}
if (string.IsNullOrEmpty(serverName))
{
throw new ArgumentNullException("serverName");
}
if (string.IsNullOrEmpty(defaultRedirectpath))
{
throw new ArgumentNullException("defaultRedirectpath");
}
ServerName = serverName;
DefaultRedirectPath = defaultRedirectpath;
_logger = logger;
EndpointHostConfig.Instance.ServiceStackHandlerFactoryPath = null;
EndpointHostConfig.Instance.MetadataRedirectPath = "metadata";
_containerAdapter = new ContainerAdapter(applicationHost);
}
protected static readonly CultureInfo UsCulture = new CultureInfo("en-US");
/// <summary>
/// Configures the specified container.
/// </summary>
/// <param name="container">The container.</param>
public override void Configure(Container container)
{
JsConfig.DateHandler = JsonDateHandler.ISO8601;
JsConfig.ExcludeTypeInfo = true;
JsConfig.IncludeNullValues = false;
SetConfig(new EndpointHostConfig
{
DefaultRedirectPath = DefaultRedirectPath,
// Tell SS to bubble exceptions up to here
WriteErrorsToResponse = false
});
container.Adapter = _containerAdapter;
Plugins.Add(new SwaggerFeature());
Plugins.Add(new CorsFeature());
ServiceStack.Logging.LogManager.LogFactory = new NLogFactory();
ResponseFilters.Add((req, res, dto) =>
{
var exception = dto as Exception;
if (exception != null)
{
_logger.ErrorException("Error processing request for {0}", exception, req.RawUrl);
if (!string.IsNullOrEmpty(exception.Message))
{
var error = exception.Message.Replace(Environment.NewLine, " ");
error = RemoveControlCharacters(error);
res.AddHeader("X-Application-Error-Code", error);
}
}
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");
}
var hasOptions = dto as IHasOptions;
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))
{
var length = long.Parse(contentLength, UsCulture);
if (length > 0)
{
var response = (HttpListenerResponse) res.OriginalResponse;
response.ContentLength64 = length;
// 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;
}
}
}
});
}
/// <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();
}
/// <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>
/// <exception cref="System.ArgumentNullException">urlBase</exception>
public override void Start(string urlBase)
{
if (string.IsNullOrEmpty(urlBase))
{
throw new ArgumentNullException("urlBase");
}
// *** Already running - just leave it in place
if (IsStarted)
{
return;
}
if (Listener == null)
{
_logger.Info("Creating HttpListner");
Listener = new HttpListener();
}
EndpointHost.Config.ServiceStackHandlerFactoryPath = HttpListenerRequestWrapper.GetHandlerPathIfAny(urlBase);
UrlPrefix = urlBase;
_logger.Info("Adding HttpListener Prefixes");
Listener.Prefixes.Add(urlBase);
IsStarted = true;
_logger.Info("Starting HttpListner");
Listener.Start();
_logger.Info("Creating HttpListner observable stream");
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)
{
LogHttpRequest(context);
if (context.Request.IsWebSocketRequest)
{
await ProcessWebSocketRequest(context).ConfigureAwait(false);
return;
}
Task.Run(() =>
{
RaiseReceiveWebRequest(context);
try
{
ProcessRequest(context);
}
catch (InvalidOperationException ex)
{
HandleException(context.Response, ex, 422);
throw;
}
catch (ResourceNotFoundException ex)
{
HandleException(context.Response, ex, 404);
throw;
}
catch (FileNotFoundException ex)
{
HandleException(context.Response, ex, 404);
throw;
}
catch (DirectoryNotFoundException ex)
{
HandleException(context.Response, ex, 404);
throw;
}
catch (UnauthorizedAccessException ex)
{
HandleException(context.Response, ex, 401);
throw;
}
catch (ArgumentException ex)
{
HandleException(context.Response, ex, 400);
throw;
}
catch (Exception ex)
{
HandleException(context.Response, ex, 500);
throw;
}
});
}
/// <summary>
/// Processes the web socket request.
/// </summary>
/// <param name="ctx">The CTX.</param>
/// <returns>Task.</returns>
private async Task ProcessWebSocketRequest(HttpListenerContext ctx)
{
try
{
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();
}
}
/// <summary>
/// Logs the HTTP request.
/// </summary>
/// <param name="ctx">The CTX.</param>
private void LogHttpRequest(HttpListenerContext ctx)
{
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;
if (EnableHttpRequestLogging)
{
_logger.LogMultiline(type + " request received from " + ctx.Request.RemoteEndPoint, LogSeverity.Debug, log);
}
}
/// <summary>
/// Appends the error message.
/// </summary>
/// <param name="response">The response.</param>
/// <param name="ex">The ex.</param>
/// <param name="statusCode">The status code.</param>
private void HandleException(HttpListenerResponse response, Exception ex, int statusCode)
{
_logger.ErrorException("Error processing request", ex);
response.StatusCode = statusCode;
response.Headers.Add("Status", statusCode.ToString(new CultureInfo("en-US")));
response.Headers.Remove("Age");
response.Headers.Remove("Expires");
response.Headers.Remove("Cache-Control");
response.Headers.Remove("Etag");
response.Headers.Remove("Last-Modified");
response.ContentType = "text/plain";
if (!string.IsNullOrEmpty(ex.Message))
{
response.AddHeader("X-Application-Error-Code", ex.Message);
}
// This could fail, but try to add the stack trace as the body content
try
{
var sb = new StringBuilder();
sb.AppendLine("{");
sb.AppendLine("\"ResponseStatus\":{");
sb.AppendFormat(" \"ErrorCode\":{0},\n", ex.GetType().Name.EncodeJson());
sb.AppendFormat(" \"Message\":{0},\n", ex.Message.EncodeJson());
sb.AppendFormat(" \"StackTrace\":{0}\n", ex.StackTrace.EncodeJson());
sb.AppendLine("}");
sb.AppendLine("}");
response.StatusCode = 500;
response.ContentType = ContentType.Json;
var sbBytes = sb.ToString().ToUtf8Bytes();
response.OutputStream.Write(sbBytes, 0, sbBytes.Length);
response.Close();
}
catch (Exception errorEx)
{
_logger.ErrorException("Error processing failed request", errorEx);
}
}
/// <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 url = context.Request.Url.ToString();
var endPoint = context.Request.RemoteEndPoint;
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);
LogResponse(context, url, endPoint);
httpRes.Close();
return;
}
throw new NotImplementedException("Cannot execute handler: " + handler + " at PathInfo: " + httpReq.PathInfo);
}
/// <summary>
/// Logs the response.
/// </summary>
/// <param name="ctx">The CTX.</param>
/// <param name="url">The URL.</param>
/// <param name="endPoint">The end point.</param>
private void LogResponse(HttpListenerContext ctx, string url, IPEndPoint endPoint)
{
if (!EnableHttpRequestLogging)
{
return;
}
var statusode = ctx.Response.StatusCode;
var log = new StringBuilder();
log.AppendLine(string.Format("Url: {0}", url));
log.AppendLine("Headers: " + string.Join(",", ctx.Response.Headers.AllKeys.Select(k => k + "=" + ctx.Response.Headers[k])));
var msg = "Http Response Sent (" + statusode + ") to " + endPoint;
_logger.LogMultiline(msg, LogSeverity.Debug, log);
}
/// <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();
return new ServiceManager(new Container(), new ServiceController(() => types));
}
/// <summary>
/// Shut down the Web Service
/// </summary>
public override void Stop()
{
if (HttpListener != null)
{
HttpListener.Dispose();
HttpListener = null;
}
if (Listener != null)
{
Listener.Prefixes.Remove(UrlPrefix);
}
base.Stop();
}
/// <summary>
/// The _supports native web socket
/// </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
{
if (!_supportsNativeWebSocket.HasValue)
{
try
{
new ClientWebSocket();
_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);
_logger.Info("Calling EndpointHost.ConfigureHost");
EndpointHost.ConfigureHost(this, ServerName, CreateServiceManager());
_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
}
}
}