90 lines
3.3 KiB
C#
90 lines
3.3 KiB
C#
using System;
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using System.Globalization;
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using System.Text;
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using MediaBrowser.Model.Services;
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using Microsoft.Extensions.Logging;
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using Microsoft.Net.Http.Headers;
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namespace Emby.Server.Implementations.HttpServer
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{
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public class ResponseFilter
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{
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private static readonly CultureInfo UsCulture = new CultureInfo("en-US");
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private readonly ILogger _logger;
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public ResponseFilter(ILogger logger)
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{
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_logger = logger;
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}
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/// <summary>
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/// Filters the response.
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/// </summary>
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/// <param name="req">The req.</param>
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/// <param name="res">The res.</param>
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/// <param name="dto">The dto.</param>
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public void FilterResponse(IRequest req, IResponse res, object dto)
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{
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// Try to prevent compatibility view
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res.AddHeader("Access-Control-Allow-Headers", "Accept, Accept-Language, Authorization, Cache-Control, Content-Disposition, Content-Encoding, Content-Language, Content-Length, Content-MD5, Content-Range, Content-Type, Date, Host, If-Match, If-Modified-Since, If-None-Match, If-Unmodified-Since, Origin, OriginToken, Pragma, Range, Slug, Transfer-Encoding, Want-Digest, X-MediaBrowser-Token, X-Emby-Authorization");
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res.AddHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, PATCH, OPTIONS");
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res.AddHeader("Access-Control-Allow-Origin", "*");
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if (dto is Exception exception)
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{
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_logger.LogError(exception, "Error processing request for {RawUrl}", req.RawUrl);
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if (!string.IsNullOrEmpty(exception.Message))
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{
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var error = exception.Message.Replace(Environment.NewLine, " ");
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error = RemoveControlCharacters(error);
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res.AddHeader("X-Application-Error-Code", error);
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}
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}
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if (dto is IHasHeaders hasHeaders)
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{
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if (!hasHeaders.Headers.ContainsKey(HeaderNames.Server))
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{
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hasHeaders.Headers[HeaderNames.Server] = "Microsoft-NetCore/2.0, UPnP/1.0 DLNADOC/1.50";
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}
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// Content length has to be explicitly set on on HttpListenerResponse or it won't be happy
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if (hasHeaders.Headers.TryGetValue(HeaderNames.ContentLength, out string contentLength)
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&& !string.IsNullOrEmpty(contentLength))
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{
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var length = long.Parse(contentLength, UsCulture);
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if (length > 0)
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{
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res.OriginalResponse.ContentLength = length;
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res.SendChunked = false;
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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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/// Removes the control characters.
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/// </summary>
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/// <param name="inString">The in string.</param>
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/// <returns>System.String.</returns>
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public static string RemoveControlCharacters(string inString)
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{
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if (inString == null) return null;
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var newString = new StringBuilder();
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foreach (var ch in inString)
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{
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if (!char.IsControl(ch))
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{
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newString.Append(ch);
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}
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}
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return newString.ToString();
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}
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}
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}
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