655 lines
24 KiB
C#
655 lines
24 KiB
C#
using MediaBrowser.Common.Configuration;
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using MediaBrowser.Common.IO;
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using MediaBrowser.Common.Net;
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using MediaBrowser.Model.Logging;
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using MediaBrowser.Model.Net;
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using System;
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using System.Collections.Concurrent;
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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.Cache;
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using System.Net.Http;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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namespace MediaBrowser.Common.Implementations.HttpClientManager
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{
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/// <summary>
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/// Class HttpClientManager
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/// </summary>
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public class HttpClientManager : IHttpClient
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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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/// The _app paths
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/// </summary>
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private readonly IApplicationPaths _appPaths;
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/// <summary>
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/// Initializes a new instance of the <see cref="HttpClientManager" /> class.
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/// </summary>
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/// <param name="appPaths">The kernel.</param>
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/// <param name="logger">The logger.</param>
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/// <exception cref="System.ArgumentNullException">
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/// appPaths
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/// or
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/// logger
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/// </exception>
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public HttpClientManager(IApplicationPaths appPaths, ILogger logger)
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{
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if (appPaths == null)
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{
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throw new ArgumentNullException("appPaths");
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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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_logger = logger;
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_appPaths = appPaths;
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}
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/// <summary>
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/// Holds a dictionary of http clients by host. Use GetHttpClient(host) to retrieve or create a client for web requests.
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/// DON'T dispose it after use.
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/// </summary>
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/// <value>The HTTP clients.</value>
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private readonly ConcurrentDictionary<string, HttpClientInfo> _httpClients = new ConcurrentDictionary<string, HttpClientInfo>();
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/// <summary>
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/// Gets
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/// </summary>
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/// <param name="host">The host.</param>
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/// <param name="enableHttpCompression">if set to <c>true</c> [enable HTTP compression].</param>
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/// <returns>HttpClient.</returns>
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/// <exception cref="System.ArgumentNullException">host</exception>
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private HttpClientInfo GetHttpClient(string host, bool enableHttpCompression)
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{
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if (string.IsNullOrEmpty(host))
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{
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throw new ArgumentNullException("host");
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}
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HttpClientInfo client;
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var key = host + enableHttpCompression;
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if (!_httpClients.TryGetValue(key, out client))
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{
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var handler = new WebRequestHandler
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{
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CachePolicy = new RequestCachePolicy(RequestCacheLevel.Revalidate),
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AutomaticDecompression = enableHttpCompression ? DecompressionMethods.Deflate : DecompressionMethods.None
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};
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client = new HttpClientInfo
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{
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HttpClient = new HttpClient(handler)
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{
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Timeout = TimeSpan.FromSeconds(20)
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}
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};
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_httpClients.TryAdd(key, client);
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}
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return client;
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}
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public async Task<HttpResponseInfo> GetResponse(HttpRequestOptions options)
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{
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ValidateParams(options.Url, options.CancellationToken);
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options.CancellationToken.ThrowIfCancellationRequested();
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var client = GetHttpClient(GetHostFromUrl(options.Url), options.EnableHttpCompression);
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if ((DateTime.UtcNow - client.LastTimeout).TotalSeconds < 30)
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{
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throw new HttpException(string.Format("Cancelling connection to {0} due to a previous timeout.", options.Url)) { IsTimedOut = true };
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}
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using (var message = GetHttpRequestMessage(options))
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{
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if (options.ResourcePool != null)
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{
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await options.ResourcePool.WaitAsync(options.CancellationToken).ConfigureAwait(false);
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}
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if ((DateTime.UtcNow - client.LastTimeout).TotalSeconds < 30)
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{
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if (options.ResourcePool != null)
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{
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options.ResourcePool.Release();
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}
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throw new HttpException(string.Format("Connection to {0} timed out", options.Url)) { IsTimedOut = true };
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}
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_logger.Info("HttpClientManager.Get url: {0}", options.Url);
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try
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{
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options.CancellationToken.ThrowIfCancellationRequested();
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var response = await client.HttpClient.SendAsync(message, HttpCompletionOption.ResponseContentRead, options.CancellationToken).ConfigureAwait(false);
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EnsureSuccessStatusCode(response);
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options.CancellationToken.ThrowIfCancellationRequested();
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return new HttpResponseInfo
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{
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Content = await response.Content.ReadAsStreamAsync().ConfigureAwait(false),
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StatusCode = response.StatusCode,
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ContentType = response.Content.Headers.ContentType.MediaType
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};
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}
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catch (OperationCanceledException ex)
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{
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var exception = GetCancellationException(options.Url, options.CancellationToken, ex);
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var httpException = exception as HttpException;
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if (httpException != null && httpException.IsTimedOut)
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{
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client.LastTimeout = DateTime.UtcNow;
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}
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throw exception;
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}
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catch (HttpRequestException ex)
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{
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_logger.ErrorException("Error getting response from " + options.Url, ex);
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throw new HttpException(ex.Message, ex);
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}
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catch (Exception ex)
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{
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_logger.ErrorException("Error getting response from " + options.Url, ex);
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throw;
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}
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finally
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{
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if (options.ResourcePool != null)
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{
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options.ResourcePool.Release();
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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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/// Performs a GET request and returns the resulting stream
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/// </summary>
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/// <param name="options">The options.</param>
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/// <returns>Task{Stream}.</returns>
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/// <exception cref="HttpException"></exception>
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/// <exception cref="MediaBrowser.Model.Net.HttpException"></exception>
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public async Task<Stream> Get(HttpRequestOptions options)
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{
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ValidateParams(options.Url, options.CancellationToken);
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options.CancellationToken.ThrowIfCancellationRequested();
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var client = GetHttpClient(GetHostFromUrl(options.Url), options.EnableHttpCompression);
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if ((DateTime.UtcNow - client.LastTimeout).TotalSeconds < 30)
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{
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throw new HttpException(string.Format("Cancelling connection to {0} due to a previous timeout.", options.Url)) { IsTimedOut = true };
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}
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using (var message = GetHttpRequestMessage(options))
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{
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if (options.ResourcePool != null)
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{
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await options.ResourcePool.WaitAsync(options.CancellationToken).ConfigureAwait(false);
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}
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if ((DateTime.UtcNow - client.LastTimeout).TotalSeconds < 30)
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{
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if (options.ResourcePool != null)
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{
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options.ResourcePool.Release();
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}
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throw new HttpException(string.Format("Connection to {0} timed out", options.Url)) { IsTimedOut = true };
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}
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_logger.Info("HttpClientManager.Get url: {0}", options.Url);
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try
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{
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options.CancellationToken.ThrowIfCancellationRequested();
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var response = await client.HttpClient.SendAsync(message, HttpCompletionOption.ResponseContentRead, options.CancellationToken).ConfigureAwait(false);
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EnsureSuccessStatusCode(response);
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options.CancellationToken.ThrowIfCancellationRequested();
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return await response.Content.ReadAsStreamAsync().ConfigureAwait(false);
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}
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catch (OperationCanceledException ex)
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{
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var exception = GetCancellationException(options.Url, options.CancellationToken, ex);
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var httpException = exception as HttpException;
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if (httpException != null && httpException.IsTimedOut)
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{
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client.LastTimeout = DateTime.UtcNow;
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}
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throw exception;
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}
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catch (HttpRequestException ex)
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{
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_logger.ErrorException("Error getting response from " + options.Url, ex);
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throw new HttpException(ex.Message, ex);
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}
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catch (Exception ex)
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{
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_logger.ErrorException("Error getting response from " + options.Url, ex);
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throw;
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}
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finally
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{
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if (options.ResourcePool != null)
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{
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options.ResourcePool.Release();
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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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/// Performs a GET request and returns the resulting stream
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/// </summary>
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/// <param name="url">The URL.</param>
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/// <param name="resourcePool">The resource pool.</param>
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/// <param name="cancellationToken">The cancellation token.</param>
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/// <returns>Task{Stream}.</returns>
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public Task<Stream> Get(string url, SemaphoreSlim resourcePool, CancellationToken cancellationToken)
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{
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return Get(new HttpRequestOptions
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{
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Url = url,
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ResourcePool = resourcePool,
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CancellationToken = cancellationToken,
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});
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}
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/// <summary>
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/// Gets the specified URL.
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/// </summary>
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/// <param name="url">The URL.</param>
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/// <param name="cancellationToken">The cancellation token.</param>
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/// <returns>Task{Stream}.</returns>
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public Task<Stream> Get(string url, CancellationToken cancellationToken)
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{
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return Get(url, null, cancellationToken);
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}
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/// <summary>
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/// Performs a POST request
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/// </summary>
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/// <param name="url">The URL.</param>
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/// <param name="postData">Params to add to the POST data.</param>
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/// <param name="resourcePool">The resource pool.</param>
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/// <param name="cancellationToken">The cancellation token.</param>
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/// <returns>stream on success, null on failure</returns>
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/// <exception cref="System.ArgumentNullException">postData</exception>
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/// <exception cref="MediaBrowser.Model.Net.HttpException"></exception>
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public async Task<Stream> Post(string url, Dictionary<string, string> postData, SemaphoreSlim resourcePool, CancellationToken cancellationToken)
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{
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ValidateParams(url, cancellationToken);
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if (postData == null)
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{
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throw new ArgumentNullException("postData");
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}
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cancellationToken.ThrowIfCancellationRequested();
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var strings = postData.Keys.Select(key => string.Format("{0}={1}", key, postData[key]));
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var postContent = string.Join("&", strings.ToArray());
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var content = new StringContent(postContent, Encoding.UTF8, "application/x-www-form-urlencoded");
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if (resourcePool != null)
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{
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await resourcePool.WaitAsync(cancellationToken).ConfigureAwait(false);
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}
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_logger.Info("HttpClientManager.Post url: {0}", url);
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try
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{
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cancellationToken.ThrowIfCancellationRequested();
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var msg = await GetHttpClient(GetHostFromUrl(url), true).HttpClient.PostAsync(url, content, cancellationToken).ConfigureAwait(false);
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EnsureSuccessStatusCode(msg);
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return await msg.Content.ReadAsStreamAsync().ConfigureAwait(false);
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}
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catch (OperationCanceledException ex)
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{
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throw GetCancellationException(url, cancellationToken, ex);
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}
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catch (HttpRequestException ex)
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{
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_logger.ErrorException("Error getting response from " + url, ex);
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throw new HttpException(ex.Message, ex);
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}
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finally
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{
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if (resourcePool != null)
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{
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resourcePool.Release();
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}
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}
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}
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/// <summary>
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/// Downloads the contents of a given url into a temporary location
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/// </summary>
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/// <param name="options">The options.</param>
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/// <returns>Task{System.String}.</returns>
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/// <exception cref="System.ArgumentNullException">progress</exception>
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/// <exception cref="HttpException"></exception>
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/// <exception cref="MediaBrowser.Model.Net.HttpException"></exception>
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public async Task<string> GetTempFile(HttpRequestOptions options)
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{
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var response = await GetTempFileResponse(options).ConfigureAwait(false);
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return response.TempFilePath;
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}
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public async Task<HttpResponseInfo> GetTempFileResponse(HttpRequestOptions options)
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{
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ValidateParams(options.Url, options.CancellationToken);
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var tempFile = Path.Combine(_appPaths.TempDirectory, Guid.NewGuid() + ".tmp");
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if (options.Progress == null)
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{
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throw new ArgumentNullException("progress");
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}
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options.CancellationToken.ThrowIfCancellationRequested();
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if (options.ResourcePool != null)
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{
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await options.ResourcePool.WaitAsync(options.CancellationToken).ConfigureAwait(false);
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}
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options.Progress.Report(0);
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_logger.Info("HttpClientManager.GetTempFile url: {0}, temp file: {1}", options.Url, tempFile);
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try
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{
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options.CancellationToken.ThrowIfCancellationRequested();
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using (var message = GetHttpRequestMessage(options))
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{
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using (var response = await GetHttpClient(GetHostFromUrl(options.Url), options.EnableHttpCompression).HttpClient.SendAsync(message, HttpCompletionOption.ResponseHeadersRead, options.CancellationToken).ConfigureAwait(false))
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{
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EnsureSuccessStatusCode(response);
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options.CancellationToken.ThrowIfCancellationRequested();
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var contentLength = GetContentLength(response);
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if (!contentLength.HasValue)
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{
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// We're not able to track progress
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using (var stream = await response.Content.ReadAsStreamAsync().ConfigureAwait(false))
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{
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using (var fs = new FileStream(tempFile, FileMode.Create, FileAccess.Write, FileShare.Read, StreamDefaults.DefaultFileStreamBufferSize, FileOptions.Asynchronous))
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{
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await stream.CopyToAsync(fs, StreamDefaults.DefaultCopyToBufferSize, options.CancellationToken).ConfigureAwait(false);
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}
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}
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}
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else
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{
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using (var stream = ProgressStream.CreateReadProgressStream(await response.Content.ReadAsStreamAsync().ConfigureAwait(false), options.Progress.Report, contentLength.Value))
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{
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using (var fs = new FileStream(tempFile, FileMode.Create, FileAccess.Write, FileShare.Read, StreamDefaults.DefaultFileStreamBufferSize, FileOptions.Asynchronous))
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{
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await stream.CopyToAsync(fs, StreamDefaults.DefaultCopyToBufferSize, options.CancellationToken).ConfigureAwait(false);
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}
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}
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}
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options.Progress.Report(100);
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return new HttpResponseInfo
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{
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TempFilePath = tempFile,
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StatusCode = response.StatusCode,
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ContentType = response.Content.Headers.ContentType.MediaType
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};
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}
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}
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}
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catch (Exception ex)
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{
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throw GetTempFileException(ex, options, tempFile);
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}
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finally
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{
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if (options.ResourcePool != null)
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{
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options.ResourcePool.Release();
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}
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}
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}
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/// <summary>
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/// Gets the message.
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/// </summary>
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/// <param name="options">The options.</param>
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/// <returns>HttpResponseMessage.</returns>
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private HttpRequestMessage GetHttpRequestMessage(HttpRequestOptions options)
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{
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var message = new HttpRequestMessage(HttpMethod.Get, options.Url);
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if (!string.IsNullOrEmpty(options.UserAgent))
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{
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message.Headers.Add("User-Agent", options.UserAgent);
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}
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if (!string.IsNullOrEmpty(options.AcceptHeader))
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{
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message.Headers.Add("Accept", options.AcceptHeader);
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}
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return message;
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}
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/// <summary>
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/// Gets the length of the content.
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/// </summary>
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/// <param name="response">The response.</param>
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/// <returns>System.Nullable{System.Int64}.</returns>
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private long? GetContentLength(HttpResponseMessage response)
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{
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IEnumerable<string> lengthValues;
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if (!response.Headers.TryGetValues("content-length", out lengthValues) && !response.Content.Headers.TryGetValues("content-length", out lengthValues))
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{
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return null;
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}
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return long.Parse(string.Join(string.Empty, lengthValues.ToArray()), UsCulture);
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}
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protected static readonly CultureInfo UsCulture = new CultureInfo("en-US");
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/// <summary>
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/// Handles the temp file exception.
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/// </summary>
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/// <param name="ex">The ex.</param>
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/// <param name="options">The options.</param>
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/// <param name="tempFile">The temp file.</param>
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/// <returns>Task.</returns>
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/// <exception cref="HttpException"></exception>
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private Exception GetTempFileException(Exception ex, HttpRequestOptions options, string tempFile)
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{
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var operationCanceledException = ex as OperationCanceledException;
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if (operationCanceledException != null)
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{
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// Cleanup
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if (File.Exists(tempFile))
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{
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File.Delete(tempFile);
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}
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return GetCancellationException(options.Url, options.CancellationToken, operationCanceledException);
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}
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_logger.ErrorException("Error getting response from " + options.Url, ex);
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var httpRequestException = ex as HttpRequestException;
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// Cleanup
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if (File.Exists(tempFile))
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{
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File.Delete(tempFile);
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}
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if (httpRequestException != null)
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{
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return new HttpException(ex.Message, ex);
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}
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return ex;
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}
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/// <summary>
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/// Validates the params.
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/// </summary>
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/// <param name="url">The URL.</param>
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/// <param name="cancellationToken">The cancellation token.</param>
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/// <exception cref="System.ArgumentNullException">url</exception>
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private void ValidateParams(string url, CancellationToken cancellationToken)
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{
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if (string.IsNullOrEmpty(url))
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{
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throw new ArgumentNullException("url");
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}
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if (cancellationToken == null)
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{
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throw new ArgumentNullException("cancellationToken");
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|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the host from URL.
|
|
/// </summary>
|
|
/// <param name="url">The URL.</param>
|
|
/// <returns>System.String.</returns>
|
|
private string GetHostFromUrl(string url)
|
|
{
|
|
var start = url.IndexOf("://", StringComparison.OrdinalIgnoreCase) + 3;
|
|
var len = url.IndexOf('/', start) - start;
|
|
return url.Substring(start, len);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
|
|
/// </summary>
|
|
public void Dispose()
|
|
{
|
|
Dispose(true);
|
|
GC.SuppressFinalize(this);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Releases unmanaged and - optionally - managed resources.
|
|
/// </summary>
|
|
/// <param name="dispose"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
|
|
protected virtual void Dispose(bool dispose)
|
|
{
|
|
if (dispose)
|
|
{
|
|
foreach (var client in _httpClients.Values.ToList())
|
|
{
|
|
client.HttpClient.Dispose();
|
|
}
|
|
|
|
_httpClients.Clear();
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Throws the cancellation exception.
|
|
/// </summary>
|
|
/// <param name="url">The URL.</param>
|
|
/// <param name="cancellationToken">The cancellation token.</param>
|
|
/// <param name="exception">The exception.</param>
|
|
/// <returns>Exception.</returns>
|
|
private Exception GetCancellationException(string url, CancellationToken cancellationToken, OperationCanceledException exception)
|
|
{
|
|
// If the HttpClient's timeout is reached, it will cancel the Task internally
|
|
if (!cancellationToken.IsCancellationRequested)
|
|
{
|
|
var msg = string.Format("Connection to {0} timed out", url);
|
|
|
|
_logger.Error(msg);
|
|
|
|
// Throw an HttpException so that the caller doesn't think it was cancelled by user code
|
|
return new HttpException(msg, exception) { IsTimedOut = true };
|
|
}
|
|
|
|
return exception;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Ensures the success status code.
|
|
/// </summary>
|
|
/// <param name="response">The response.</param>
|
|
/// <exception cref="MediaBrowser.Model.Net.HttpException"></exception>
|
|
private void EnsureSuccessStatusCode(HttpResponseMessage response)
|
|
{
|
|
if (!response.IsSuccessStatusCode)
|
|
{
|
|
throw new HttpException(response.ReasonPhrase) { StatusCode = response.StatusCode };
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Posts the specified URL.
|
|
/// </summary>
|
|
/// <param name="url">The URL.</param>
|
|
/// <param name="postData">The post data.</param>
|
|
/// <param name="cancellationToken">The cancellation token.</param>
|
|
/// <returns>Task{Stream}.</returns>
|
|
public Task<Stream> Post(string url, Dictionary<string, string> postData, CancellationToken cancellationToken)
|
|
{
|
|
return Post(url, postData, null, cancellationToken);
|
|
}
|
|
}
|
|
}
|