718 lines
25 KiB
C#
718 lines
25 KiB
C#
using System.Collections.Specialized;
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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.Reflection;
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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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/// When one request to a host times out, we'll ban all other requests for this period of time, to prevent scans from stalling
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/// </summary>
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private const int TimeoutSeconds = 30;
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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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private readonly IFileSystem _fileSystem;
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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 app paths.</param>
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/// <param name="logger">The logger.</param>
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/// <param name="fileSystem">The file system.</param>
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/// <exception cref="System.ArgumentNullException">appPaths
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/// or
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/// logger</exception>
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public HttpClientManager(IApplicationPaths appPaths, ILogger logger, IFileSystem fileSystem)
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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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_fileSystem = fileSystem;
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_appPaths = appPaths;
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// http://stackoverflow.com/questions/566437/http-post-returns-the-error-417-expectation-failed-c
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ServicePointManager.Expect100Continue = false;
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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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client = new HttpClientInfo();
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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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private PropertyInfo _httpBehaviorPropertyInfo;
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private WebRequest GetRequest(HttpRequestOptions options, string method, bool enableHttpCompression)
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{
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var request = (HttpWebRequest)WebRequest.Create(options.Url);
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AddRequestHeaders(request, options);
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request.AutomaticDecompression = enableHttpCompression ? DecompressionMethods.Deflate : DecompressionMethods.None;
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request.CachePolicy = new RequestCachePolicy(RequestCacheLevel.BypassCache);
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request.ConnectionGroupName = GetHostFromUrl(options.Url);
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request.KeepAlive = true;
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request.Method = method;
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request.Pipelined = true;
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request.Timeout = 20000;
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if (!string.IsNullOrEmpty(options.Host))
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{
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request.Host = options.Host;
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}
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#if !__MonoCS__
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// This is a hack to prevent KeepAlive from getting disabled internally by the HttpWebRequest
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// May need to remove this for mono
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var sp = request.ServicePoint;
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if (_httpBehaviorPropertyInfo == null)
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{
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_httpBehaviorPropertyInfo = sp.GetType().GetProperty("HttpBehaviour", BindingFlags.Instance | BindingFlags.NonPublic);
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}
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_httpBehaviorPropertyInfo.SetValue(sp, (byte)0, null);
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#endif
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return request;
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}
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private void AddRequestHeaders(HttpWebRequest request, HttpRequestOptions options)
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{
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foreach (var header in options.RequestHeaders.ToList())
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{
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if (string.Equals(header.Key, "Accept", StringComparison.OrdinalIgnoreCase))
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{
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request.Accept = header.Value;
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}
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else if (string.Equals(header.Key, "User-Agent", StringComparison.OrdinalIgnoreCase))
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{
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request.UserAgent = header.Value;
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}
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else
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{
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request.Headers.Set(header.Key, header.Value);
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}
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}
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}
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/// <summary>
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/// Gets the response internal.
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/// </summary>
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/// <param name="options">The options.</param>
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/// <returns>Task{HttpResponseInfo}.</returns>
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public Task<HttpResponseInfo> GetResponse(HttpRequestOptions options)
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{
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return SendAsync(options, "GET");
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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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public async Task<Stream> Get(HttpRequestOptions options)
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{
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var response = await GetResponse(options).ConfigureAwait(false);
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return response.Content;
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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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/// send as an asynchronous operation.
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/// </summary>
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/// <param name="options">The options.</param>
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/// <param name="httpMethod">The HTTP method.</param>
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/// <returns>Task{HttpResponseInfo}.</returns>
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/// <exception cref="HttpException">
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/// </exception>
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public async Task<HttpResponseInfo> SendAsync(HttpRequestOptions options, string httpMethod)
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{
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ValidateParams(options);
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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 < TimeoutSeconds)
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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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var httpWebRequest = GetRequest(options, httpMethod, options.EnableHttpCompression);
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if (options.RequestContentBytes != null ||
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!string.IsNullOrEmpty(options.RequestContent) ||
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string.Equals(httpMethod, "post", StringComparison.OrdinalIgnoreCase))
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{
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var bytes = options.RequestContentBytes ??
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Encoding.UTF8.GetBytes(options.RequestContent ?? string.Empty);
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httpWebRequest.ContentType = options.RequestContentType ?? "application/x-www-form-urlencoded";
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httpWebRequest.ContentLength = bytes.Length;
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httpWebRequest.GetRequestStream().Write(bytes, 0, bytes.Length);
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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 < TimeoutSeconds)
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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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if (options.LogRequest)
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{
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_logger.Info("HttpClientManager {0}: {1}", httpMethod.ToUpper(), options.Url);
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}
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try
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{
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options.CancellationToken.ThrowIfCancellationRequested();
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if (!options.BufferContent)
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{
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var response = await httpWebRequest.GetResponseAsync().ConfigureAwait(false);
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var httpResponse = (HttpWebResponse)response;
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EnsureSuccessStatusCode(httpResponse, options);
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options.CancellationToken.ThrowIfCancellationRequested();
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return GetResponseInfo(httpResponse, httpResponse.GetResponseStream(), GetContentLength(httpResponse));
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}
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using (var response = await httpWebRequest.GetResponseAsync().ConfigureAwait(false))
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{
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var httpResponse = (HttpWebResponse)response;
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EnsureSuccessStatusCode(httpResponse, options);
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options.CancellationToken.ThrowIfCancellationRequested();
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using (var stream = httpResponse.GetResponseStream())
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{
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var memoryStream = new MemoryStream();
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await stream.CopyToAsync(memoryStream).ConfigureAwait(false);
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memoryStream.Position = 0;
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return GetResponseInfo(httpResponse, memoryStream, memoryStream.Length);
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}
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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 (WebException ex)
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{
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throw GetException(ex, options);
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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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/// <summary>
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/// Gets the 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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/// <returns>HttpException.</returns>
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private HttpException GetException(WebException ex, HttpRequestOptions options)
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{
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_logger.ErrorException("Error getting response from " + options.Url, ex);
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return new HttpException(ex.Message, ex);
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}
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private HttpResponseInfo GetResponseInfo(HttpWebResponse httpResponse, Stream content, long? contentLength)
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{
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return new HttpResponseInfo
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{
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Content = content,
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StatusCode = httpResponse.StatusCode,
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ContentType = httpResponse.ContentType,
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Headers = new NameValueCollection(httpResponse.Headers),
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ContentLength = contentLength
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};
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}
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private HttpResponseInfo GetResponseInfo(HttpWebResponse httpResponse, string tempFile, long? contentLength)
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{
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return new HttpResponseInfo
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{
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TempFilePath = tempFile,
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StatusCode = httpResponse.StatusCode,
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ContentType = httpResponse.ContentType,
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Headers = httpResponse.Headers,
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ContentLength = contentLength
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};
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}
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public Task<HttpResponseInfo> Post(HttpRequestOptions options)
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{
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return SendAsync(options, "POST");
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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="options">The options.</param>
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/// <param name="postData">Params to add to the POST data.</param>
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/// <returns>stream on success, null on failure</returns>
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public async Task<Stream> Post(HttpRequestOptions options, Dictionary<string, string> postData)
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{
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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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options.RequestContent = postContent;
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options.RequestContentType = "application/x-www-form-urlencoded";
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var response = await Post(options).ConfigureAwait(false);
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return response.Content;
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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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public Task<Stream> Post(string url, Dictionary<string, string> postData, SemaphoreSlim resourcePool, CancellationToken cancellationToken)
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{
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return Post(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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}, postData);
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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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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);
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Directory.CreateDirectory(_appPaths.TempDirectory);
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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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var httpWebRequest = GetRequest(options, "GET", options.EnableHttpCompression);
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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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if (options.LogRequest)
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{
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_logger.Info("HttpClientManager.GetTempFileResponse url: {0}", options.Url);
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}
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try
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{
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options.CancellationToken.ThrowIfCancellationRequested();
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using (var response = await httpWebRequest.GetResponseAsync().ConfigureAwait(false))
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{
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var httpResponse = (HttpWebResponse)response;
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EnsureSuccessStatusCode(httpResponse, options);
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options.CancellationToken.ThrowIfCancellationRequested();
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var contentLength = GetContentLength(httpResponse);
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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 = httpResponse.GetResponseStream())
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{
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using (var fs = _fileSystem.GetFileStream(tempFile, FileMode.Create, FileAccess.Write, FileShare.Read, true))
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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(httpResponse.GetResponseStream(), options.Progress.Report, contentLength.Value))
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{
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using (var fs = _fileSystem.GetFileStream(tempFile, FileMode.Create, FileAccess.Write, FileShare.Read, true))
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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 GetResponseInfo(httpResponse, tempFile, contentLength);
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}
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}
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catch (OperationCanceledException ex)
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{
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throw GetTempFileException(ex, options, tempFile);
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}
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catch (HttpRequestException ex)
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{
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throw GetTempFileException(ex, options, tempFile);
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}
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catch (WebException ex)
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{
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throw GetTempFileException(ex, options, tempFile);
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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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private long? GetContentLength(HttpWebResponse response)
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{
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var length = response.ContentLength;
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if (length == 0)
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{
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return null;
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}
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return length;
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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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DeleteTempFile(tempFile);
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|
|
|
return GetCancellationException(options.Url, options.CancellationToken, operationCanceledException);
|
|
}
|
|
|
|
_logger.ErrorException("Error getting response from " + options.Url, ex);
|
|
|
|
// Cleanup
|
|
DeleteTempFile(tempFile);
|
|
|
|
var httpRequestException = ex as HttpRequestException;
|
|
|
|
if (httpRequestException != null)
|
|
{
|
|
return new HttpException(ex.Message, ex);
|
|
}
|
|
|
|
var webException = ex as WebException;
|
|
|
|
if (webException != null)
|
|
{
|
|
throw GetException(webException, options);
|
|
}
|
|
|
|
return ex;
|
|
}
|
|
|
|
private void DeleteTempFile(string file)
|
|
{
|
|
try
|
|
{
|
|
File.Delete(file);
|
|
}
|
|
catch (IOException)
|
|
{
|
|
// Might not have been created at all. No need to worry.
|
|
}
|
|
}
|
|
|
|
private void ValidateParams(HttpRequestOptions options)
|
|
{
|
|
if (string.IsNullOrEmpty(options.Url))
|
|
{
|
|
throw new ArgumentNullException("options");
|
|
}
|
|
}
|
|
|
|
/// <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)
|
|
{
|
|
_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;
|
|
}
|
|
|
|
private void EnsureSuccessStatusCode(HttpWebResponse response, HttpRequestOptions options)
|
|
{
|
|
var statusCode = response.StatusCode;
|
|
var isSuccessful = statusCode >= HttpStatusCode.OK && statusCode <= (HttpStatusCode)299;
|
|
|
|
if (!isSuccessful)
|
|
{
|
|
if (options.LogErrorResponseBody)
|
|
{
|
|
try
|
|
{
|
|
using (var stream = response.GetResponseStream())
|
|
{
|
|
if (stream != null)
|
|
{
|
|
using (var reader = new StreamReader(stream))
|
|
{
|
|
var msg = reader.ReadToEnd();
|
|
|
|
_logger.Error(msg);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
catch
|
|
{
|
|
|
|
}
|
|
}
|
|
throw new HttpException(response.StatusDescription) { 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);
|
|
}
|
|
}
|
|
}
|