49 lines
1.6 KiB
C#
49 lines
1.6 KiB
C#
using System;
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using System.Net.Http;
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using System.Net.Http.Headers;
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using System.Threading;
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using System.Threading.Tasks;
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namespace MediaBrowser.Common.Net
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{
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/// <summary>
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/// User agent delegating handler.
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/// Adds User-Agent header to all requests.
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/// </summary>
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public class UserAgentDelegatingHandler : DelegatingHandler
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{
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private readonly ProductInfoHeaderValue[] _userAgentValues;
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/// <inheritdoc />
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public UserAgentDelegatingHandler(IApplicationHost applicationHost)
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{
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_userAgentValues = new []
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{
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new ProductInfoHeaderValue(applicationHost.Name.Replace(' ', '-'), applicationHost.ApplicationVersionString),
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new ProductInfoHeaderValue($"({Environment.OSVersion}; {applicationHost.ApplicationUserAgentAddress})")
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};
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}
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/// <summary>
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/// Send request message.
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/// </summary>
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/// <param name="request">The request message.</param>
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/// <param name="cancellationToken">The cancellation token.</param>
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/// <returns>A <see cref="Task"/> containing the <see cref="HttpResponseMessage"/>.</returns>
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protected override Task<HttpResponseMessage> SendAsync(
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HttpRequestMessage request,
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CancellationToken cancellationToken)
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{
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if (request.Headers.UserAgent.Count == 0)
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{
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for (var i = 0; i < _userAgentValues.Length; i++)
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{
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request.Headers.UserAgent.Add(_userAgentValues[i]);
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}
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}
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return base.SendAsync(request, cancellationToken);
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}
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}
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}
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