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* Remove useless MemoryStream in DlnaHttpClient * Use HttpContent.ReadFromJsonAsync extension * Call ConfigureAwait for IAsyncDisposable * Use HttpContent.CopyToAsync where possible
137 lines
5 KiB
C#
137 lines
5 KiB
C#
#pragma warning disable CS1591
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using System;
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using System.Globalization;
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using System.IO;
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using System.Net.Http;
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using System.Net.Mime;
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using System.Text;
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using System.Text.RegularExpressions;
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using System.Threading;
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using System.Threading.Tasks;
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using System.Xml;
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using System.Xml.Linq;
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using Emby.Dlna.Common;
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using MediaBrowser.Common.Net;
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using Microsoft.Extensions.Logging;
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namespace Emby.Dlna.PlayTo
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{
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/// <summary>
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/// Http client for Dlna PlayTo function.
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/// </summary>
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public partial class DlnaHttpClient
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{
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private readonly ILogger _logger;
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private readonly IHttpClientFactory _httpClientFactory;
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public DlnaHttpClient(ILogger logger, IHttpClientFactory httpClientFactory)
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{
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_logger = logger;
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_httpClientFactory = httpClientFactory;
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}
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[GeneratedRegex("(&(?![a-z]*;))")]
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private static partial Regex EscapeAmpersandRegex();
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private static string NormalizeServiceUrl(string baseUrl, string serviceUrl)
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{
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// If it's already a complete url, don't stick anything onto the front of it
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if (serviceUrl.StartsWith("http", StringComparison.OrdinalIgnoreCase))
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{
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return serviceUrl;
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}
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if (!serviceUrl.StartsWith('/'))
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{
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serviceUrl = "/" + serviceUrl;
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}
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return baseUrl + serviceUrl;
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}
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private async Task<XDocument?> SendRequestAsync(HttpRequestMessage request, CancellationToken cancellationToken)
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{
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var client = _httpClientFactory.CreateClient(NamedClient.Dlna);
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using var response = await client.SendAsync(request, cancellationToken).ConfigureAwait(false);
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response.EnsureSuccessStatusCode();
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Stream stream = await response.Content.ReadAsStreamAsync(cancellationToken).ConfigureAwait(false);
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await using (stream.ConfigureAwait(false))
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{
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try
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{
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return await XDocument.LoadAsync(
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stream,
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LoadOptions.None,
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cancellationToken).ConfigureAwait(false);
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}
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catch (XmlException)
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{
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// try correcting the Xml response with common errors
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stream.Position = 0;
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using StreamReader sr = new StreamReader(stream);
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var xmlString = await sr.ReadToEndAsync(cancellationToken).ConfigureAwait(false);
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// find and replace unescaped ampersands (&)
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xmlString = EscapeAmpersandRegex().Replace(xmlString, "&");
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try
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{
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// retry reading Xml
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using var xmlReader = new StringReader(xmlString);
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return await XDocument.LoadAsync(
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xmlReader,
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LoadOptions.None,
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cancellationToken).ConfigureAwait(false);
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}
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catch (XmlException ex)
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{
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_logger.LogError(ex, "Failed to parse response");
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_logger.LogDebug("Malformed response: {Content}\n", xmlString);
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return null;
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}
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}
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}
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}
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public async Task<XDocument?> GetDataAsync(string url, CancellationToken cancellationToken)
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{
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using var request = new HttpRequestMessage(HttpMethod.Get, url);
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// Have to await here instead of returning the Task directly, otherwise request would be disposed too soon
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return await SendRequestAsync(request, cancellationToken).ConfigureAwait(false);
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}
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public async Task<XDocument?> SendCommandAsync(
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string baseUrl,
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DeviceService service,
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string command,
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string postData,
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string? header = null,
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CancellationToken cancellationToken = default)
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{
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using var request = new HttpRequestMessage(HttpMethod.Post, NormalizeServiceUrl(baseUrl, service.ControlUrl))
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{
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Content = new StringContent(postData, Encoding.UTF8, MediaTypeNames.Text.Xml)
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};
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request.Headers.TryAddWithoutValidation(
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"SOAPACTION",
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string.Format(
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CultureInfo.InvariantCulture,
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"\"{0}#{1}\"",
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service.ServiceType,
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command));
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request.Headers.Pragma.ParseAdd("no-cache");
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if (!string.IsNullOrEmpty(header))
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{
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request.Headers.TryAddWithoutValidation("contentFeatures.dlna.org", header);
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}
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// Have to await here instead of returning the Task directly, otherwise request would be disposed too soon
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return await SendRequestAsync(request, cancellationToken).ConfigureAwait(false);
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}
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}
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}
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