jellyfin/Emby.Server.Implementations/HttpServer/HttpListenerHost.cs
2017-09-24 16:24:12 -04:00

806 lines
27 KiB
C#

using MediaBrowser.Common.Extensions;
using MediaBrowser.Controller.Configuration;
using MediaBrowser.Controller.Net;
using MediaBrowser.Model.Logging;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Emby.Server.Implementations.HttpServer.SocketSharp;
using Emby.Server.Implementations.Services;
using MediaBrowser.Common.Net;
using MediaBrowser.Common.Security;
using MediaBrowser.Controller;
using MediaBrowser.Model.Cryptography;
using MediaBrowser.Model.Extensions;
using MediaBrowser.Model.IO;
using MediaBrowser.Model.Net;
using MediaBrowser.Model.Serialization;
using MediaBrowser.Model.Services;
using MediaBrowser.Model.System;
using MediaBrowser.Model.Text;
namespace Emby.Server.Implementations.HttpServer
{
public class HttpListenerHost : IHttpServer, IDisposable
{
private string DefaultRedirectPath { get; set; }
private readonly ILogger _logger;
public string[] UrlPrefixes { get; private set; }
private readonly List<IService> _restServices = new List<IService>();
private IHttpListener _listener;
public event EventHandler<WebSocketConnectEventArgs> WebSocketConnected;
public event EventHandler<WebSocketConnectingEventArgs> WebSocketConnecting;
private readonly IServerConfigurationManager _config;
private readonly INetworkManager _networkManager;
private readonly IMemoryStreamFactory _memoryStreamProvider;
private readonly IServerApplicationHost _appHost;
private readonly ITextEncoding _textEncoding;
private readonly ISocketFactory _socketFactory;
private readonly ICryptoProvider _cryptoProvider;
private readonly IFileSystem _fileSystem;
private readonly IJsonSerializer _jsonSerializer;
private readonly IXmlSerializer _xmlSerializer;
private readonly X509Certificate _certificate;
private readonly IEnvironmentInfo _environment;
private readonly Func<Type, Func<string, object>> _funcParseFn;
private readonly bool _enableDualModeSockets;
public Action<IRequest, IResponse, object>[] RequestFilters { get; set; }
public Action<IRequest, IResponse, object>[] ResponseFilters { get; set; }
private readonly Dictionary<Type, Type> ServiceOperationsMap = new Dictionary<Type, Type>();
public static HttpListenerHost Instance { get; protected set; }
public HttpListenerHost(IServerApplicationHost applicationHost,
ILogger logger,
IServerConfigurationManager config,
string serviceName,
string defaultRedirectPath, INetworkManager networkManager, IMemoryStreamFactory memoryStreamProvider, ITextEncoding textEncoding, ISocketFactory socketFactory, ICryptoProvider cryptoProvider, IJsonSerializer jsonSerializer, IXmlSerializer xmlSerializer, IEnvironmentInfo environment, X509Certificate certificate, Func<Type, Func<string, object>> funcParseFn, bool enableDualModeSockets, IFileSystem fileSystem)
{
Instance = this;
_appHost = applicationHost;
DefaultRedirectPath = defaultRedirectPath;
_networkManager = networkManager;
_memoryStreamProvider = memoryStreamProvider;
_textEncoding = textEncoding;
_socketFactory = socketFactory;
_cryptoProvider = cryptoProvider;
_jsonSerializer = jsonSerializer;
_xmlSerializer = xmlSerializer;
_environment = environment;
_certificate = certificate;
_funcParseFn = funcParseFn;
_enableDualModeSockets = enableDualModeSockets;
_fileSystem = fileSystem;
_config = config;
_logger = logger;
RequestFilters = new Action<IRequest, IResponse, object>[] { };
ResponseFilters = new Action<IRequest, IResponse, object>[] { };
}
public string GlobalResponse { get; set; }
readonly Dictionary<Type, int> _mapExceptionToStatusCode = new Dictionary<Type, int>
{
{typeof (ResourceNotFoundException), 404},
{typeof (RemoteServiceUnavailableException), 502},
{typeof (FileNotFoundException), 404},
//{typeof (DirectoryNotFoundException), 404},
{typeof (SecurityException), 401},
{typeof (PaymentRequiredException), 402},
{typeof (ArgumentException), 400}
};
protected ILogger Logger
{
get
{
return _logger;
}
}
public object CreateInstance(Type type)
{
return _appHost.CreateInstance(type);
}
/// <summary>
/// Applies the request filters. Returns whether or not the request has been handled
/// and no more processing should be done.
/// </summary>
/// <returns></returns>
public void ApplyRequestFilters(IRequest req, IResponse res, object requestDto)
{
//Exec all RequestFilter attributes with Priority < 0
var attributes = GetRequestFilterAttributes(requestDto.GetType());
var i = 0;
var count = attributes.Count;
for (; i < count && attributes[i].Priority < 0; i++)
{
var attribute = attributes[i];
attribute.RequestFilter(req, res, requestDto);
}
//Exec global filters
foreach (var requestFilter in RequestFilters)
{
requestFilter(req, res, requestDto);
}
//Exec remaining RequestFilter attributes with Priority >= 0
for (; i < count && attributes[i].Priority >= 0; i++)
{
var attribute = attributes[i];
attribute.RequestFilter(req, res, requestDto);
}
}
public Type GetServiceTypeByRequest(Type requestType)
{
Type serviceType;
ServiceOperationsMap.TryGetValue(requestType, out serviceType);
return serviceType;
}
public void AddServiceInfo(Type serviceType, Type requestType)
{
ServiceOperationsMap[requestType] = serviceType;
}
private List<IHasRequestFilter> GetRequestFilterAttributes(Type requestDtoType)
{
var attributes = requestDtoType.GetTypeInfo().GetCustomAttributes(true).OfType<IHasRequestFilter>().ToList();
var serviceType = GetServiceTypeByRequest(requestDtoType);
if (serviceType != null)
{
attributes.AddRange(serviceType.GetTypeInfo().GetCustomAttributes(true).OfType<IHasRequestFilter>());
}
attributes.Sort((x, y) => x.Priority - y.Priority);
return attributes;
}
private IHttpListener GetListener()
{
//return new KestrelHost.KestrelListener(_logger, _environment, _fileSystem);
return new WebSocketSharpListener(_logger,
_certificate,
_memoryStreamProvider,
_textEncoding,
_networkManager,
_socketFactory,
_cryptoProvider,
_enableDualModeSockets,
_fileSystem,
_environment);
}
private void OnWebSocketConnecting(WebSocketConnectingEventArgs args)
{
if (_disposed)
{
return;
}
if (WebSocketConnecting != null)
{
WebSocketConnecting(this, args);
}
}
private void OnWebSocketConnected(WebSocketConnectEventArgs args)
{
if (_disposed)
{
return;
}
if (WebSocketConnected != null)
{
WebSocketConnected(this, args);
}
}
private Exception GetActualException(Exception ex)
{
var agg = ex as AggregateException;
if (agg != null)
{
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;
}
private int GetStatusCode(Exception ex)
{
if (ex is ArgumentException)
{
return 400;
}
var exceptionType = ex.GetType();
int statusCode;
if (!_mapExceptionToStatusCode.TryGetValue(exceptionType, out statusCode))
{
if (ex is DirectoryNotFoundException)
{
statusCode = 404;
}
else
{
statusCode = 500;
}
}
return statusCode;
}
private void ErrorHandler(Exception ex, IRequest httpReq, bool logException = true)
{
try
{
ex = GetActualException(ex);
if (logException)
{
_logger.ErrorException("Error processing request", ex);
}
var httpRes = httpReq.Response;
if (httpRes.IsClosed)
{
return;
}
var statusCode = GetStatusCode(ex);
httpRes.StatusCode = statusCode;
httpRes.ContentType = "text/html";
Write(httpRes, ex.Message);
}
catch
{
//_logger.ErrorException("Error this.ProcessRequest(context)(Exception while writing error to the response)", errorEx);
}
}
/// <summary>
/// Shut down the Web Service
/// </summary>
public void Stop()
{
if (_listener != null)
{
_logger.Info("Stopping HttpListener...");
var task = _listener.Stop();
Task.WaitAll(task);
_logger.Info("HttpListener stopped");
}
}
private readonly Dictionary<string, int> _skipLogExtensions = new Dictionary<string, int>(StringComparer.OrdinalIgnoreCase)
{
{".js", 0},
{".css", 0},
{".woff", 0},
{".woff2", 0},
{".ttf", 0},
{".html", 0}
};
private bool EnableLogging(string url, string localPath)
{
var extension = GetExtension(url);
if (string.IsNullOrWhiteSpace(extension) || !_skipLogExtensions.ContainsKey(extension))
{
if (string.IsNullOrWhiteSpace(localPath) || localPath.IndexOf("system/ping", StringComparison.OrdinalIgnoreCase) == -1)
{
return true;
}
}
return false;
}
private string GetExtension(string url)
{
var parts = url.Split(new[] { '?' }, 2);
return Path.GetExtension(parts[0]);
}
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
var newQueryString = MyHttpUtility.ParseQueryString(uri.Query);
var originalCount = newQueryString.Count;
if (originalCount == 0)
{
return url;
}
// this removes the key if exists
newQueryString.Remove(key);
if (originalCount == newQueryString.Count)
{
return url;
}
// this gets the page path from root without QueryString
string pagePathWithoutQueryString = url.Split(new[] { '?' }, StringSplitOptions.RemoveEmptyEntries)[0];
return newQueryString.Count > 0
? String.Format("{0}?{1}", pagePathWithoutQueryString, newQueryString)
: pagePathWithoutQueryString;
}
private string GetUrlToLog(string url)
{
url = RemoveQueryStringByKey(url, "api_key");
return url;
}
private string NormalizeConfiguredLocalAddress(string address)
{
var index = address.Trim('/').IndexOf('/');
if (index != -1)
{
address = address.Substring(index + 1);
}
return address.Trim('/');
}
private bool ValidateHost(string host)
{
var hosts = _config
.Configuration
.LocalNetworkAddresses
.Select(NormalizeConfiguredLocalAddress)
.ToList();
if (hosts.Count == 0)
{
return true;
}
host = host ?? string.Empty;
_logger.Debug("Validating host {0}", host);
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;
}
/// <summary>
/// Overridable method that can be used to implement a custom hnandler
/// </summary>
protected async Task RequestHandler(IHttpRequest httpReq, string urlString, string host, string localPath, CancellationToken cancellationToken)
{
var date = DateTime.Now;
var httpRes = httpReq.Response;
bool enableLog = false;
bool logHeaders = false;
string urlToLog = null;
string remoteIp = null;
try
{
if (_disposed)
{
httpRes.StatusCode = 503;
httpRes.ContentType = "text/plain";
Write(httpRes, "Server shutting down");
return;
}
if (!ValidateHost(host))
{
httpRes.StatusCode = 400;
httpRes.ContentType = "text/plain";
Write(httpRes, "Invalid host");
return;
}
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";
Write(httpRes, string.Empty);
return;
}
var operationName = httpReq.OperationName;
enableLog = EnableLogging(urlString, localPath);
urlToLog = urlString;
logHeaders = enableLog && urlToLog.IndexOf("/videos/", StringComparison.OrdinalIgnoreCase) != -1;
if (enableLog)
{
urlToLog = GetUrlToLog(urlString);
remoteIp = httpReq.RemoteIp;
LoggerUtils.LogRequest(_logger, urlToLog, httpReq.HttpMethod, httpReq.UserAgent, logHeaders ? httpReq.Headers : null);
}
if (string.Equals(localPath, "/emby/", StringComparison.OrdinalIgnoreCase) ||
string.Equals(localPath, "/mediabrowser/", StringComparison.OrdinalIgnoreCase))
{
RedirectToUrl(httpRes, DefaultRedirectPath);
return;
}
if (string.Equals(localPath, "/emby", StringComparison.OrdinalIgnoreCase) ||
string.Equals(localPath, "/mediabrowser", StringComparison.OrdinalIgnoreCase))
{
RedirectToUrl(httpRes, "emby/" + DefaultRedirectPath);
return;
}
if (string.Equals(localPath, "/mediabrowser/", StringComparison.OrdinalIgnoreCase) ||
string.Equals(localPath, "/mediabrowser", StringComparison.OrdinalIgnoreCase) ||
localPath.IndexOf("mediabrowser/web", StringComparison.OrdinalIgnoreCase) != -1)
{
httpRes.StatusCode = 200;
httpRes.ContentType = "text/html";
var newUrl = urlString.Replace("mediabrowser", "emby", StringComparison.OrdinalIgnoreCase)
.Replace("/dashboard/", "/web/", StringComparison.OrdinalIgnoreCase);
if (!string.Equals(newUrl, urlString, StringComparison.OrdinalIgnoreCase))
{
Write(httpRes,
"<!doctype html><html><head><title>Emby</title></head><body>Please update your Emby bookmark to <a href=\"" +
newUrl + "\">" + newUrl + "</a></body></html>");
return;
}
}
if (localPath.IndexOf("dashboard/", StringComparison.OrdinalIgnoreCase) != -1 &&
localPath.IndexOf("web/dashboard", StringComparison.OrdinalIgnoreCase) == -1)
{
httpRes.StatusCode = 200;
httpRes.ContentType = "text/html";
var newUrl = urlString.Replace("mediabrowser", "emby", StringComparison.OrdinalIgnoreCase)
.Replace("/dashboard/", "/web/", StringComparison.OrdinalIgnoreCase);
if (!string.Equals(newUrl, urlString, StringComparison.OrdinalIgnoreCase))
{
Write(httpRes,
"<!doctype html><html><head><title>Emby</title></head><body>Please update your Emby bookmark to <a href=\"" +
newUrl + "\">" + newUrl + "</a></body></html>");
return;
}
}
if (string.Equals(localPath, "/web", StringComparison.OrdinalIgnoreCase))
{
RedirectToUrl(httpRes, DefaultRedirectPath);
return;
}
if (string.Equals(localPath, "/web/", StringComparison.OrdinalIgnoreCase))
{
RedirectToUrl(httpRes, "../" + DefaultRedirectPath);
return;
}
if (string.Equals(localPath, "/", StringComparison.OrdinalIgnoreCase))
{
RedirectToUrl(httpRes, DefaultRedirectPath);
return;
}
if (string.IsNullOrEmpty(localPath))
{
RedirectToUrl(httpRes, "/" + DefaultRedirectPath);
return;
}
if (string.Equals(localPath, "/emby/pin", StringComparison.OrdinalIgnoreCase))
{
RedirectToUrl(httpRes, "web/pin.html");
return;
}
if (!string.IsNullOrWhiteSpace(GlobalResponse))
{
httpRes.StatusCode = 503;
httpRes.ContentType = "text/html";
Write(httpRes, GlobalResponse);
return;
}
var handler = GetServiceHandler(httpReq);
if (handler != null)
{
await handler.ProcessRequestAsync(this, httpReq, httpRes, Logger, operationName, cancellationToken).ConfigureAwait(false);
}
else
{
ErrorHandler(new FileNotFoundException(), httpReq, false);
}
}
catch (OperationCanceledException ex)
{
ErrorHandler(ex, httpReq, false);
}
catch (Exception ex)
{
var logException = !string.Equals(ex.GetType().Name, "SocketException", StringComparison.OrdinalIgnoreCase);
#if DEBUG
logException = true;
#endif
ErrorHandler(ex, httpReq, logException);
}
finally
{
httpRes.Close();
if (enableLog)
{
var statusCode = httpRes.StatusCode;
var duration = DateTime.Now - date;
LoggerUtils.LogResponse(_logger, statusCode, urlToLog, remoteIp, duration, logHeaders ? httpRes.Headers : null);
}
}
}
// Entry point for HttpListener
public ServiceHandler GetServiceHandler(IHttpRequest httpReq)
{
var pathInfo = httpReq.PathInfo;
var pathParts = pathInfo.TrimStart('/').Split('/');
if (pathParts.Length == 0)
{
_logger.Error("Path parts empty for PathInfo: {0}, Url: {1}", pathInfo, httpReq.RawUrl);
return null;
}
string contentType;
var restPath = ServiceHandler.FindMatchingRestPath(httpReq.HttpMethod, pathInfo, _logger, out contentType);
if (restPath != null)
{
return new ServiceHandler
{
RestPath = restPath,
ResponseContentType = contentType
};
}
_logger.Error("Could not find handler for {0}", pathInfo);
return null;
}
private void Write(IResponse response, string text)
{
var bOutput = Encoding.UTF8.GetBytes(text);
response.SetContentLength(bOutput.Length);
var outputStream = response.OutputStream;
outputStream.Write(bOutput, 0, bOutput.Length);
}
public static void RedirectToUrl(IResponse httpRes, string url)
{
httpRes.StatusCode = 302;
httpRes.AddHeader("Location", url);
}
public ServiceController ServiceController { get; private set; }
/// <summary>
/// Adds the rest handlers.
/// </summary>
/// <param name="services">The services.</param>
public void Init(IEnumerable<IService> services)
{
_restServices.AddRange(services);
ServiceController = new ServiceController();
_logger.Info("Calling ServiceStack AppHost.Init");
var types = _restServices.Select(r => r.GetType()).ToArray();
ServiceController.Init(this, types);
var list = new List<Action<IRequest, IResponse, object>>();
foreach (var filter in _appHost.GetExports<IRequestFilter>())
{
list.Add(filter.Filter);
}
RequestFilters = list.ToArray();
ResponseFilters = new Action<IRequest, IResponse, object>[]
{
new ResponseFilter(_logger).FilterResponse
};
}
public RouteAttribute[] GetRouteAttributes(Type requestType)
{
var routes = requestType.GetTypeInfo().GetCustomAttributes<RouteAttribute>(true).ToList();
var clone = routes.ToList();
foreach (var route in clone)
{
routes.Add(new RouteAttribute(NormalizeEmbyRoutePath(route.Path), route.Verbs)
{
Notes = route.Notes,
Priority = route.Priority,
Summary = route.Summary
});
routes.Add(new RouteAttribute(NormalizeMediaBrowserRoutePath(route.Path), route.Verbs)
{
Notes = route.Notes,
Priority = route.Priority,
Summary = route.Summary
});
//routes.Add(new RouteAttribute(DoubleNormalizeEmbyRoutePath(route.Path), route.Verbs)
//{
// Notes = route.Notes,
// Priority = route.Priority,
// Summary = route.Summary
//});
}
return routes.ToArray(routes.Count);
}
public Func<string, object> GetParseFn(Type propertyType)
{
return _funcParseFn(propertyType);
}
public void SerializeToJson(object o, Stream stream)
{
_jsonSerializer.SerializeToStream(o, stream);
}
public void SerializeToXml(object o, Stream stream)
{
_xmlSerializer.SerializeToStream(o, stream);
}
public object DeserializeXml(Type type, Stream stream)
{
return _xmlSerializer.DeserializeFromStream(type, stream);
}
public object DeserializeJson(Type type, Stream stream)
{
return _jsonSerializer.DeserializeFromStream(stream, type);
}
private string NormalizeEmbyRoutePath(string path)
{
if (path.StartsWith("/", StringComparison.OrdinalIgnoreCase))
{
return "/emby" + path;
}
return "emby/" + path;
}
private string NormalizeMediaBrowserRoutePath(string path)
{
if (path.StartsWith("/", StringComparison.OrdinalIgnoreCase))
{
return "/mediabrowser" + path;
}
return "mediabrowser/" + path;
}
private string DoubleNormalizeEmbyRoutePath(string path)
{
if (path.StartsWith("/", StringComparison.OrdinalIgnoreCase))
{
return "/emby/emby" + path;
}
return "emby/emby/" + path;
}
private bool _disposed;
private readonly object _disposeLock = new object();
protected virtual void Dispose(bool disposing)
{
if (_disposed) return;
lock (_disposeLock)
{
if (_disposed) return;
_disposed = true;
if (disposing)
{
Stop();
}
}
}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
public void StartServer(string[] urlPrefixes)
{
UrlPrefixes = urlPrefixes;
_listener = GetListener();
_listener.WebSocketConnected = OnWebSocketConnected;
_listener.WebSocketConnecting = OnWebSocketConnecting;
_listener.ErrorHandler = ErrorHandler;
_listener.RequestHandler = RequestHandler;
_listener.Start(UrlPrefixes);
}
}
}