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#pragma warning disable CS1591
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using System;
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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.IO.Compression;
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using System.Net;
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using System.Runtime.Serialization;
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using System.Text;
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using System.Threading.Tasks;
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using System.Xml;
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using Emby.Server.Implementations.Services;
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using MediaBrowser.Controller.Net;
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using MediaBrowser.Model.IO;
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using MediaBrowser.Model.Serialization;
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using MediaBrowser.Model.Services;
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using Microsoft.Extensions.Logging;
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using Microsoft.Extensions.Primitives;
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using Microsoft.Net.Http.Headers;
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using IRequest = MediaBrowser.Model.Services.IRequest;
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using MimeTypes = MediaBrowser.Model.Net.MimeTypes;
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namespace Emby.Server.Implementations.HttpServer
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{
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/// <summary>
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/// Class HttpResultFactory.
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/// </summary>
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public class HttpResultFactory : IHttpResultFactory
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{
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// Last-Modified and If-Modified-Since must follow strict date format,
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// see https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/If-Modified-Since
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private const string HttpDateFormat = "ddd, dd MMM yyyy HH:mm:ss \"GMT\"";
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// We specifically use en-US culture because both day of week and month names require it
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private static readonly CultureInfo _enUSculture = new CultureInfo("en-US", false);
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/// <summary>
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/// The logger.
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/// </summary>
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private readonly ILogger<HttpResultFactory> _logger;
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private readonly IFileSystem _fileSystem;
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private readonly IJsonSerializer _jsonSerializer;
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private readonly IStreamHelper _streamHelper;
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/// <summary>
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/// Initializes a new instance of the <see cref="HttpResultFactory" /> class.
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/// </summary>
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public HttpResultFactory(ILoggerFactory loggerfactory, IFileSystem fileSystem, IJsonSerializer jsonSerializer, IStreamHelper streamHelper)
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{
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_fileSystem = fileSystem;
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_jsonSerializer = jsonSerializer;
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_streamHelper = streamHelper;
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_logger = loggerfactory.CreateLogger<HttpResultFactory>();
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}
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/// <summary>
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/// Gets the result.
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/// </summary>
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/// <param name="requestContext">The request context.</param>
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/// <param name="content">The content.</param>
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/// <param name="contentType">Type of the content.</param>
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/// <param name="responseHeaders">The response headers.</param>
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/// <returns>System.Object.</returns>
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public object GetResult(IRequest requestContext, byte[] content, string contentType, IDictionary<string, string> responseHeaders = null)
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{
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return GetHttpResult(requestContext, content, contentType, true, responseHeaders);
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}
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public object GetResult(string content, string contentType, IDictionary<string, string> responseHeaders = null)
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{
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return GetHttpResult(null, content, contentType, true, responseHeaders);
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}
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public object GetResult(IRequest requestContext, Stream content, string contentType, IDictionary<string, string> responseHeaders = null)
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{
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return GetHttpResult(requestContext, content, contentType, true, responseHeaders);
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}
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public object GetResult(IRequest requestContext, string content, string contentType, IDictionary<string, string> responseHeaders = null)
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{
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return GetHttpResult(requestContext, content, contentType, true, responseHeaders);
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}
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public object GetRedirectResult(string url)
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{
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var responseHeaders = new Dictionary<string, string>();
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responseHeaders[HeaderNames.Location] = url;
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var result = new HttpResult(Array.Empty<byte>(), "text/plain", HttpStatusCode.Redirect);
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AddResponseHeaders(result, responseHeaders);
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return result;
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}
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/// <summary>
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/// Gets the HTTP result.
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/// </summary>
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private IHasHeaders GetHttpResult(IRequest requestContext, Stream content, string contentType, bool addCachePrevention, IDictionary<string, string> responseHeaders = null)
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{
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var result = new StreamWriter(content, contentType);
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if (responseHeaders == null)
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{
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responseHeaders = new Dictionary<string, string>();
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}
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if (addCachePrevention && !responseHeaders.TryGetValue(HeaderNames.Expires, out _))
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{
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responseHeaders[HeaderNames.Expires] = "0";
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}
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AddResponseHeaders(result, responseHeaders);
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return result;
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}
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/// <summary>
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/// Gets the HTTP result.
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/// </summary>
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private IHasHeaders GetHttpResult(IRequest requestContext, byte[] content, string contentType, bool addCachePrevention, IDictionary<string, string> responseHeaders = null)
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{
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string compressionType = null;
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bool isHeadRequest = false;
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if (requestContext != null)
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{
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compressionType = GetCompressionType(requestContext, content, contentType);
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isHeadRequest = string.Equals(requestContext.Verb, "head", StringComparison.OrdinalIgnoreCase);
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}
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IHasHeaders result;
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if (string.IsNullOrEmpty(compressionType))
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{
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var contentLength = content.Length;
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if (isHeadRequest)
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{
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content = Array.Empty<byte>();
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}
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result = new StreamWriter(content, contentType, contentLength);
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}
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else
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{
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result = GetCompressedResult(content, compressionType, responseHeaders, isHeadRequest, contentType);
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}
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if (responseHeaders == null)
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{
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responseHeaders = new Dictionary<string, string>();
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}
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if (addCachePrevention && !responseHeaders.TryGetValue(HeaderNames.Expires, out string _))
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{
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responseHeaders[HeaderNames.Expires] = "0";
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}
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AddResponseHeaders(result, responseHeaders);
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return result;
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}
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/// <summary>
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/// Gets the HTTP result.
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/// </summary>
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private IHasHeaders GetHttpResult(IRequest requestContext, string content, string contentType, bool addCachePrevention, IDictionary<string, string> responseHeaders = null)
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{
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IHasHeaders result;
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var bytes = Encoding.UTF8.GetBytes(content);
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var compressionType = requestContext == null ? null : GetCompressionType(requestContext, bytes, contentType);
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var isHeadRequest = requestContext == null ? false : string.Equals(requestContext.Verb, "head", StringComparison.OrdinalIgnoreCase);
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if (string.IsNullOrEmpty(compressionType))
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{
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var contentLength = bytes.Length;
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if (isHeadRequest)
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{
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bytes = Array.Empty<byte>();
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}
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result = new StreamWriter(bytes, contentType, contentLength);
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}
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else
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{
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result = GetCompressedResult(bytes, compressionType, responseHeaders, isHeadRequest, contentType);
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}
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2016-10-01 22:09:33 -04:00
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if (responseHeaders == null)
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{
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responseHeaders = new Dictionary<string, string>();
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}
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2013-09-15 13:34:37 -04:00
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2019-03-05 13:20:28 -05:00
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if (addCachePrevention && !responseHeaders.TryGetValue(HeaderNames.Expires, out string _))
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{
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responseHeaders[HeaderNames.Expires] = "0";
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}
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2016-10-01 22:09:33 -04:00
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AddResponseHeaders(result, responseHeaders);
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2013-03-23 22:45:00 -04:00
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return result;
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}
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/// <summary>
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/// Gets the optimized result.
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/// </summary>
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/// <typeparam name="T"></typeparam>
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public object GetResult<T>(IRequest requestContext, T result, IDictionary<string, string> responseHeaders = null)
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where T : class
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{
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if (result == null)
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{
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throw new ArgumentNullException(nameof(result));
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}
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if (responseHeaders == null)
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{
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responseHeaders = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
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}
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responseHeaders[HeaderNames.Expires] = "0";
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return ToOptimizedResultInternal(requestContext, result, responseHeaders);
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}
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private string GetCompressionType(IRequest request, byte[] content, string responseContentType)
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{
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if (responseContentType == null)
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{
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return null;
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}
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2018-09-12 13:26:21 -04:00
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// Per apple docs, hls manifests must be compressed
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if (!responseContentType.StartsWith("text/", StringComparison.OrdinalIgnoreCase) &&
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responseContentType.IndexOf("json", StringComparison.OrdinalIgnoreCase) == -1 &&
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responseContentType.IndexOf("javascript", StringComparison.OrdinalIgnoreCase) == -1 &&
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responseContentType.IndexOf("xml", StringComparison.OrdinalIgnoreCase) == -1 &&
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responseContentType.IndexOf("application/x-mpegURL", StringComparison.OrdinalIgnoreCase) == -1)
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{
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return null;
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}
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if (content.Length < 1024)
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{
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return null;
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}
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return GetCompressionType(request);
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}
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2019-01-06 15:50:43 -05:00
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private static string GetCompressionType(IRequest request)
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{
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var acceptEncoding = request.Headers[HeaderNames.AcceptEncoding].ToString();
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if (!string.IsNullOrEmpty(acceptEncoding))
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{
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// if (_brotliCompressor != null && acceptEncoding.IndexOf("br", StringComparison.OrdinalIgnoreCase) != -1)
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// return "br";
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if (acceptEncoding.Contains("deflate", StringComparison.OrdinalIgnoreCase))
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{
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return "deflate";
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}
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if (acceptEncoding.Contains("gzip", StringComparison.OrdinalIgnoreCase))
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{
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return "gzip";
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}
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}
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return null;
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}
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/// <summary>
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/// Returns the optimized result for the IRequestContext.
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/// Does not use or store results in any cache.
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/// </summary>
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/// <param name="request"></param>
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/// <param name="dto"></param>
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/// <returns></returns>
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public object ToOptimizedResult<T>(IRequest request, T dto)
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2017-09-28 13:05:10 -04:00
|
|
|
{
|
2018-09-12 13:26:21 -04:00
|
|
|
return ToOptimizedResultInternal(request, dto);
|
2017-09-28 13:05:10 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
private object ToOptimizedResultInternal<T>(IRequest request, T dto, IDictionary<string, string> responseHeaders = null)
|
2016-11-10 09:41:24 -05:00
|
|
|
{
|
2019-02-12 15:06:34 -05:00
|
|
|
// TODO: @bond use Span and .Equals
|
|
|
|
var contentType = request.ResponseContentType?.Split(';')[0].Trim().ToLowerInvariant();
|
2016-11-10 09:41:24 -05:00
|
|
|
|
2019-02-09 05:53:07 -05:00
|
|
|
switch (contentType)
|
2016-11-10 09:41:24 -05:00
|
|
|
{
|
2017-08-01 12:45:57 -04:00
|
|
|
case "application/xml":
|
|
|
|
case "text/xml":
|
|
|
|
case "text/xml; charset=utf-8": //"text/xml; charset=utf-8" also matches xml
|
2018-09-12 13:26:21 -04:00
|
|
|
return GetHttpResult(request, SerializeToXmlString(dto), contentType, false, responseHeaders);
|
2017-02-12 20:07:48 -05:00
|
|
|
|
2017-08-01 12:45:57 -04:00
|
|
|
case "application/json":
|
|
|
|
case "text/json":
|
2018-09-12 13:26:21 -04:00
|
|
|
return GetHttpResult(request, _jsonSerializer.SerializeToString(dto), contentType, false, responseHeaders);
|
2017-08-01 12:45:57 -04:00
|
|
|
default:
|
2018-09-12 13:26:21 -04:00
|
|
|
break;
|
|
|
|
}
|
2016-11-10 09:41:24 -05:00
|
|
|
|
2018-09-12 13:26:21 -04:00
|
|
|
var isHeadRequest = string.Equals(request.Verb, "head", StringComparison.OrdinalIgnoreCase);
|
2016-11-10 09:41:24 -05:00
|
|
|
|
2018-09-12 13:26:21 -04:00
|
|
|
var ms = new MemoryStream();
|
|
|
|
var writerFn = RequestHelper.GetResponseWriter(HttpListenerHost.Instance, contentType);
|
2017-09-28 13:05:10 -04:00
|
|
|
|
2018-09-12 13:26:21 -04:00
|
|
|
writerFn(dto, ms);
|
2016-11-10 09:41:24 -05:00
|
|
|
|
2018-09-12 13:26:21 -04:00
|
|
|
ms.Position = 0;
|
2016-11-10 20:37:20 -05:00
|
|
|
|
2018-09-12 13:26:21 -04:00
|
|
|
if (isHeadRequest)
|
2016-11-10 09:41:24 -05:00
|
|
|
{
|
2018-09-12 13:26:21 -04:00
|
|
|
using (ms)
|
2016-11-10 09:41:24 -05:00
|
|
|
{
|
2018-09-12 13:26:21 -04:00
|
|
|
return GetHttpResult(request, Array.Empty<byte>(), contentType, true, responseHeaders);
|
2016-11-10 09:41:24 -05:00
|
|
|
}
|
|
|
|
}
|
2018-09-12 13:26:21 -04:00
|
|
|
|
|
|
|
return GetHttpResult(request, ms, contentType, true, responseHeaders);
|
2016-11-10 09:41:24 -05:00
|
|
|
}
|
|
|
|
|
2020-08-07 11:38:01 -04:00
|
|
|
private IHasHeaders GetCompressedResult(
|
|
|
|
byte[] content,
|
2018-09-12 13:26:21 -04:00
|
|
|
string requestedCompressionType,
|
|
|
|
IDictionary<string, string> responseHeaders,
|
|
|
|
bool isHeadRequest,
|
|
|
|
string contentType)
|
2013-03-23 22:45:00 -04:00
|
|
|
{
|
|
|
|
if (responseHeaders == null)
|
|
|
|
{
|
2015-12-01 00:22:52 -05:00
|
|
|
responseHeaders = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
|
2013-03-23 22:45:00 -04:00
|
|
|
}
|
|
|
|
|
2018-09-12 13:26:21 -04:00
|
|
|
content = Compress(content, requestedCompressionType);
|
2019-03-05 13:20:28 -05:00
|
|
|
responseHeaders[HeaderNames.ContentEncoding] = requestedCompressionType;
|
2013-03-23 22:45:00 -04:00
|
|
|
|
2019-03-05 13:20:28 -05:00
|
|
|
responseHeaders[HeaderNames.Vary] = HeaderNames.AcceptEncoding;
|
2013-03-23 22:45:00 -04:00
|
|
|
|
2018-09-12 13:26:21 -04:00
|
|
|
var contentLength = content.Length;
|
2013-03-23 22:45:00 -04:00
|
|
|
|
2018-09-12 13:26:21 -04:00
|
|
|
if (isHeadRequest)
|
2013-03-23 22:45:00 -04:00
|
|
|
{
|
2019-04-24 08:06:54 -04:00
|
|
|
var result = new StreamWriter(Array.Empty<byte>(), contentType, contentLength);
|
2018-09-12 13:26:21 -04:00
|
|
|
AddResponseHeaders(result, responseHeaders);
|
|
|
|
return result;
|
2013-03-23 22:45:00 -04:00
|
|
|
}
|
2018-09-12 13:26:21 -04:00
|
|
|
else
|
2013-03-23 22:45:00 -04:00
|
|
|
{
|
2019-04-24 08:06:54 -04:00
|
|
|
var result = new StreamWriter(content, contentType, contentLength);
|
2018-09-12 13:26:21 -04:00
|
|
|
AddResponseHeaders(result, responseHeaders);
|
|
|
|
return result;
|
2013-03-23 22:45:00 -04:00
|
|
|
}
|
2018-09-12 13:26:21 -04:00
|
|
|
}
|
2013-03-23 22:45:00 -04:00
|
|
|
|
2018-09-12 13:26:21 -04:00
|
|
|
private byte[] Compress(byte[] bytes, string compressionType)
|
|
|
|
{
|
|
|
|
if (string.Equals(compressionType, "deflate", StringComparison.OrdinalIgnoreCase))
|
2019-02-09 05:53:07 -05:00
|
|
|
{
|
2018-09-12 13:26:21 -04:00
|
|
|
return Deflate(bytes);
|
2019-02-09 05:53:07 -05:00
|
|
|
}
|
2018-09-12 13:26:21 -04:00
|
|
|
|
|
|
|
if (string.Equals(compressionType, "gzip", StringComparison.OrdinalIgnoreCase))
|
2019-02-09 05:53:07 -05:00
|
|
|
{
|
2018-09-12 13:26:21 -04:00
|
|
|
return GZip(bytes);
|
2019-02-09 05:53:07 -05:00
|
|
|
}
|
2013-03-23 22:45:00 -04:00
|
|
|
|
2018-09-12 13:26:21 -04:00
|
|
|
throw new NotSupportedException(compressionType);
|
|
|
|
}
|
|
|
|
|
2019-01-06 15:50:43 -05:00
|
|
|
private static byte[] Deflate(byte[] bytes)
|
2018-09-12 13:26:21 -04:00
|
|
|
{
|
|
|
|
// In .NET FX incompat-ville, you can't access compressed bytes without closing DeflateStream
|
|
|
|
// Which means we must use MemoryStream since you have to use ToArray() on a closed Stream
|
|
|
|
using (var ms = new MemoryStream())
|
|
|
|
using (var zipStream = new DeflateStream(ms, CompressionMode.Compress))
|
2013-03-23 22:45:00 -04:00
|
|
|
{
|
2018-09-12 13:26:21 -04:00
|
|
|
zipStream.Write(bytes, 0, bytes.Length);
|
|
|
|
zipStream.Dispose();
|
|
|
|
|
|
|
|
return ms.ToArray();
|
2013-03-23 22:45:00 -04:00
|
|
|
}
|
2018-09-12 13:26:21 -04:00
|
|
|
}
|
2013-03-23 22:45:00 -04:00
|
|
|
|
2019-01-06 15:50:43 -05:00
|
|
|
private static byte[] GZip(byte[] buffer)
|
2018-09-12 13:26:21 -04:00
|
|
|
{
|
|
|
|
using (var ms = new MemoryStream())
|
|
|
|
using (var zipStream = new GZipStream(ms, CompressionMode.Compress))
|
|
|
|
{
|
|
|
|
zipStream.Write(buffer, 0, buffer.Length);
|
|
|
|
zipStream.Dispose();
|
2013-03-23 22:45:00 -04:00
|
|
|
|
2018-09-12 13:26:21 -04:00
|
|
|
return ms.ToArray();
|
|
|
|
}
|
|
|
|
}
|
2013-03-23 22:45:00 -04:00
|
|
|
|
2019-01-06 15:50:43 -05:00
|
|
|
private static string SerializeToXmlString(object from)
|
2018-09-12 13:26:21 -04:00
|
|
|
{
|
|
|
|
using (var ms = new MemoryStream())
|
2013-03-23 22:45:00 -04:00
|
|
|
{
|
2018-09-12 13:26:21 -04:00
|
|
|
var xwSettings = new XmlWriterSettings();
|
|
|
|
xwSettings.Encoding = new UTF8Encoding(false);
|
|
|
|
xwSettings.OmitXmlDeclaration = false;
|
2013-03-23 22:45:00 -04:00
|
|
|
|
2018-09-12 13:26:21 -04:00
|
|
|
using (var xw = XmlWriter.Create(ms, xwSettings))
|
|
|
|
{
|
|
|
|
var serializer = new DataContractSerializer(from.GetType());
|
|
|
|
serializer.WriteObject(xw, from);
|
|
|
|
xw.Flush();
|
|
|
|
ms.Seek(0, SeekOrigin.Begin);
|
2019-01-06 14:35:36 -05:00
|
|
|
using (var reader = new StreamReader(ms))
|
|
|
|
{
|
|
|
|
return reader.ReadToEnd();
|
|
|
|
}
|
2018-09-12 13:26:21 -04:00
|
|
|
}
|
|
|
|
}
|
2013-03-23 22:45:00 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
/// Pres the process optimized result.
|
|
|
|
/// </summary>
|
2019-02-13 15:08:59 -05:00
|
|
|
private object GetCachedResult(IRequest requestContext, IDictionary<string, string> responseHeaders, StaticResultOptions options)
|
2013-03-23 22:45:00 -04:00
|
|
|
{
|
2020-06-19 05:57:37 -04:00
|
|
|
bool noCache = requestContext.Headers[HeaderNames.CacheControl].ToString().IndexOf("no-cache", StringComparison.OrdinalIgnoreCase) != -1;
|
2019-02-13 15:08:59 -05:00
|
|
|
AddCachingHeaders(responseHeaders, options.CacheDuration, noCache, options.DateLastModified);
|
2017-05-09 14:51:26 -04:00
|
|
|
|
|
|
|
if (!noCache)
|
2013-03-23 22:45:00 -04:00
|
|
|
{
|
2020-04-27 12:03:42 -04:00
|
|
|
if (!DateTime.TryParseExact(requestContext.Headers[HeaderNames.IfModifiedSince], HttpDateFormat, _enUSculture, DateTimeStyles.AssumeUniversal | DateTimeStyles.AdjustToUniversal, out var ifModifiedSinceHeader))
|
2020-04-13 18:52:43 -04:00
|
|
|
{
|
|
|
|
_logger.LogDebug("Failed to parse If-Modified-Since header date: {0}", requestContext.Headers[HeaderNames.IfModifiedSince]);
|
|
|
|
return null;
|
|
|
|
}
|
2019-02-13 15:08:59 -05:00
|
|
|
|
|
|
|
if (IsNotModified(ifModifiedSinceHeader, options.CacheDuration, options.DateLastModified))
|
2017-05-09 14:51:26 -04:00
|
|
|
{
|
2019-02-13 15:08:59 -05:00
|
|
|
AddAgeHeader(responseHeaders, options.DateLastModified);
|
2013-03-23 22:45:00 -04:00
|
|
|
|
2019-02-13 15:08:59 -05:00
|
|
|
var result = new HttpResult(Array.Empty<byte>(), options.ContentType ?? "text/html", HttpStatusCode.NotModified);
|
2013-03-23 22:45:00 -04:00
|
|
|
|
2017-05-09 14:51:26 -04:00
|
|
|
AddResponseHeaders(result, responseHeaders);
|
2013-03-23 22:45:00 -04:00
|
|
|
|
2017-05-09 14:51:26 -04:00
|
|
|
return result;
|
|
|
|
}
|
2013-03-23 22:45:00 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
return null;
|
|
|
|
}
|
|
|
|
|
2016-06-19 02:18:29 -04:00
|
|
|
public Task<object> GetStaticFileResult(IRequest requestContext,
|
2014-08-29 08:14:41 -04:00
|
|
|
string path,
|
2020-01-22 16:27:03 -05:00
|
|
|
FileShare fileShare = FileShare.Read)
|
2013-03-08 12:25:25 -05:00
|
|
|
{
|
2013-03-23 22:45:00 -04:00
|
|
|
if (string.IsNullOrEmpty(path))
|
|
|
|
{
|
2019-01-06 15:50:43 -05:00
|
|
|
throw new ArgumentNullException(nameof(path));
|
2013-03-23 22:45:00 -04:00
|
|
|
}
|
|
|
|
|
2014-08-30 10:26:29 -04:00
|
|
|
return GetStaticFileResult(requestContext, new StaticFileResultOptions
|
|
|
|
{
|
|
|
|
Path = path,
|
|
|
|
FileShare = fileShare
|
|
|
|
});
|
2014-03-12 15:56:12 -04:00
|
|
|
}
|
|
|
|
|
2019-01-06 14:35:36 -05:00
|
|
|
public Task<object> GetStaticFileResult(IRequest requestContext, StaticFileResultOptions options)
|
2014-03-12 15:56:12 -04:00
|
|
|
{
|
2014-08-30 10:26:29 -04:00
|
|
|
var path = options.Path;
|
|
|
|
var fileShare = options.FileShare;
|
|
|
|
|
2014-03-12 15:56:12 -04:00
|
|
|
if (string.IsNullOrEmpty(path))
|
|
|
|
{
|
2019-10-25 06:47:20 -04:00
|
|
|
throw new ArgumentException("Path can't be empty.", nameof(options));
|
2014-03-12 15:56:12 -04:00
|
|
|
}
|
|
|
|
|
2020-01-22 16:27:03 -05:00
|
|
|
if (fileShare != FileShare.Read && fileShare != FileShare.ReadWrite)
|
2013-09-15 13:34:37 -04:00
|
|
|
{
|
|
|
|
throw new ArgumentException("FileShare must be either Read or ReadWrite");
|
|
|
|
}
|
|
|
|
|
2018-09-12 13:26:21 -04:00
|
|
|
if (string.IsNullOrEmpty(options.ContentType))
|
2014-08-30 10:26:29 -04:00
|
|
|
{
|
|
|
|
options.ContentType = MimeTypes.GetMimeType(path);
|
|
|
|
}
|
2013-03-23 22:45:00 -04:00
|
|
|
|
2016-07-17 12:59:40 -04:00
|
|
|
if (!options.DateLastModified.HasValue)
|
|
|
|
{
|
|
|
|
options.DateLastModified = _fileSystem.GetLastWriteTimeUtc(path);
|
|
|
|
}
|
|
|
|
|
2014-08-30 10:26:29 -04:00
|
|
|
options.ContentFactory = () => Task.FromResult(GetFileStream(path, fileShare));
|
|
|
|
|
2017-07-18 13:34:56 -04:00
|
|
|
options.ResponseHeaders = options.ResponseHeaders ?? new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
|
|
|
|
|
2014-08-30 10:26:29 -04:00
|
|
|
return GetStaticResult(requestContext, options);
|
2013-03-23 22:45:00 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
/// Gets the file stream.
|
|
|
|
/// </summary>
|
|
|
|
/// <param name="path">The path.</param>
|
2013-09-15 13:34:37 -04:00
|
|
|
/// <param name="fileShare">The file share.</param>
|
2013-03-23 22:45:00 -04:00
|
|
|
/// <returns>Stream.</returns>
|
2020-01-22 16:27:03 -05:00
|
|
|
private Stream GetFileStream(string path, FileShare fileShare)
|
2013-03-23 22:45:00 -04:00
|
|
|
{
|
2020-01-22 16:27:03 -05:00
|
|
|
return new FileStream(path, FileMode.Open, FileAccess.Read, fileShare);
|
2013-03-23 22:45:00 -04:00
|
|
|
}
|
|
|
|
|
2016-06-19 02:18:29 -04:00
|
|
|
public Task<object> GetStaticResult(IRequest requestContext,
|
2014-08-29 08:14:41 -04:00
|
|
|
Guid cacheKey,
|
|
|
|
DateTime? lastDateModified,
|
|
|
|
TimeSpan? cacheDuration,
|
|
|
|
string contentType,
|
|
|
|
Func<Task<Stream>> factoryFn,
|
|
|
|
IDictionary<string, string> responseHeaders = null,
|
|
|
|
bool isHeadRequest = false)
|
|
|
|
{
|
2014-08-30 10:26:29 -04:00
|
|
|
return GetStaticResult(requestContext, new StaticResultOptions
|
|
|
|
{
|
|
|
|
CacheDuration = cacheDuration,
|
|
|
|
ContentFactory = factoryFn,
|
|
|
|
ContentType = contentType,
|
|
|
|
DateLastModified = lastDateModified,
|
|
|
|
IsHeadRequest = isHeadRequest,
|
|
|
|
ResponseHeaders = responseHeaders
|
|
|
|
});
|
2014-08-29 08:14:41 -04:00
|
|
|
}
|
|
|
|
|
2016-06-19 02:18:29 -04:00
|
|
|
public async Task<object> GetStaticResult(IRequest requestContext, StaticResultOptions options)
|
2013-03-23 22:45:00 -04:00
|
|
|
{
|
2015-12-01 00:22:52 -05:00
|
|
|
options.ResponseHeaders = options.ResponseHeaders ?? new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
|
2014-08-30 10:26:29 -04:00
|
|
|
|
2019-01-22 15:18:48 -05:00
|
|
|
var contentType = options.ContentType;
|
2019-02-27 08:23:39 -05:00
|
|
|
if (!StringValues.IsNullOrEmpty(requestContext.Headers[HeaderNames.IfModifiedSince]))
|
2013-03-23 22:45:00 -04:00
|
|
|
{
|
2018-09-12 13:26:21 -04:00
|
|
|
// See if the result is already cached in the browser
|
2019-02-13 15:08:59 -05:00
|
|
|
var result = GetCachedResult(requestContext, options.ResponseHeaders, options);
|
2013-03-23 22:45:00 -04:00
|
|
|
|
2018-09-12 13:26:21 -04:00
|
|
|
if (result != null)
|
|
|
|
{
|
|
|
|
return result;
|
|
|
|
}
|
2013-03-23 22:45:00 -04:00
|
|
|
}
|
|
|
|
|
2017-09-24 16:24:12 -04:00
|
|
|
// TODO: We don't really need the option value
|
|
|
|
var isHeadRequest = options.IsHeadRequest || string.Equals(requestContext.Verb, "HEAD", StringComparison.OrdinalIgnoreCase);
|
2014-08-30 10:26:29 -04:00
|
|
|
var factoryFn = options.ContentFactory;
|
|
|
|
var responseHeaders = options.ResponseHeaders;
|
2019-02-13 15:08:59 -05:00
|
|
|
AddCachingHeaders(responseHeaders, options.CacheDuration, false, options.DateLastModified);
|
|
|
|
AddAgeHeader(responseHeaders, options.DateLastModified);
|
2014-08-30 10:26:29 -04:00
|
|
|
|
2019-03-05 13:20:28 -05:00
|
|
|
var rangeHeader = requestContext.Headers[HeaderNames.Range];
|
2013-03-23 22:45:00 -04:00
|
|
|
|
2018-09-12 13:26:21 -04:00
|
|
|
if (!isHeadRequest && !string.IsNullOrEmpty(options.Path))
|
2013-03-23 22:45:00 -04:00
|
|
|
{
|
2019-03-05 13:32:22 -05:00
|
|
|
var hasHeaders = new FileWriter(options.Path, contentType, rangeHeader, _logger, _fileSystem, _streamHelper)
|
2017-08-01 12:45:57 -04:00
|
|
|
{
|
|
|
|
OnComplete = options.OnComplete,
|
|
|
|
OnError = options.OnError,
|
|
|
|
FileShare = options.FileShare
|
|
|
|
};
|
2017-08-30 14:06:54 -04:00
|
|
|
|
|
|
|
AddResponseHeaders(hasHeaders, options.ResponseHeaders);
|
|
|
|
return hasHeaders;
|
2016-12-22 11:47:43 -05:00
|
|
|
}
|
|
|
|
|
2018-09-12 13:26:21 -04:00
|
|
|
var stream = await factoryFn().ConfigureAwait(false);
|
|
|
|
|
|
|
|
var totalContentLength = options.ContentLength;
|
|
|
|
if (!totalContentLength.HasValue)
|
2016-12-22 11:47:43 -05:00
|
|
|
{
|
2018-09-12 13:26:21 -04:00
|
|
|
try
|
|
|
|
{
|
|
|
|
totalContentLength = stream.Length;
|
|
|
|
}
|
|
|
|
catch (NotSupportedException)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!string.IsNullOrWhiteSpace(rangeHeader) && totalContentLength.HasValue)
|
|
|
|
{
|
2020-04-17 14:01:25 -04:00
|
|
|
var hasHeaders = new RangeRequestWriter(rangeHeader, totalContentLength.Value, stream, contentType, isHeadRequest)
|
2014-02-19 00:21:03 -05:00
|
|
|
{
|
2017-08-01 12:45:57 -04:00
|
|
|
OnComplete = options.OnComplete
|
|
|
|
};
|
2017-08-30 14:06:54 -04:00
|
|
|
|
|
|
|
AddResponseHeaders(hasHeaders, options.ResponseHeaders);
|
|
|
|
return hasHeaders;
|
2017-08-01 12:45:57 -04:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
2019-04-24 08:06:54 -04:00
|
|
|
if (totalContentLength.HasValue)
|
|
|
|
{
|
|
|
|
responseHeaders["Content-Length"] = totalContentLength.Value.ToString(CultureInfo.InvariantCulture);
|
|
|
|
}
|
|
|
|
|
2016-12-22 11:47:43 -05:00
|
|
|
if (isHeadRequest)
|
|
|
|
{
|
2018-09-12 13:26:21 -04:00
|
|
|
using (stream)
|
|
|
|
{
|
|
|
|
return GetHttpResult(requestContext, Array.Empty<byte>(), contentType, true, responseHeaders);
|
|
|
|
}
|
2016-12-22 11:47:43 -05:00
|
|
|
}
|
2014-02-19 00:21:03 -05:00
|
|
|
|
2019-02-09 05:53:07 -05:00
|
|
|
var hasHeaders = new StreamWriter(stream, contentType)
|
2017-08-01 12:45:57 -04:00
|
|
|
{
|
|
|
|
OnComplete = options.OnComplete,
|
|
|
|
OnError = options.OnError
|
|
|
|
};
|
2017-08-30 14:06:54 -04:00
|
|
|
|
|
|
|
AddResponseHeaders(hasHeaders, options.ResponseHeaders);
|
|
|
|
return hasHeaders;
|
2016-11-10 09:41:24 -05:00
|
|
|
}
|
2013-03-23 22:45:00 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
/// Adds the caching responseHeaders.
|
|
|
|
/// </summary>
|
2020-04-17 14:01:25 -04:00
|
|
|
private void AddCachingHeaders(
|
|
|
|
IDictionary<string, string> responseHeaders,
|
|
|
|
TimeSpan? cacheDuration,
|
|
|
|
bool noCache,
|
|
|
|
DateTime? lastModifiedDate)
|
2013-03-23 22:45:00 -04:00
|
|
|
{
|
2019-02-13 15:08:59 -05:00
|
|
|
if (noCache)
|
2013-03-23 22:45:00 -04:00
|
|
|
{
|
2019-03-05 13:20:28 -05:00
|
|
|
responseHeaders[HeaderNames.CacheControl] = "no-cache, no-store, must-revalidate";
|
|
|
|
responseHeaders[HeaderNames.Pragma] = "no-cache, no-store, must-revalidate";
|
2019-02-13 15:08:59 -05:00
|
|
|
return;
|
2013-03-23 22:45:00 -04:00
|
|
|
}
|
|
|
|
|
2017-09-22 16:33:01 -04:00
|
|
|
if (cacheDuration.HasValue)
|
2013-03-23 22:45:00 -04:00
|
|
|
{
|
2019-03-05 13:20:28 -05:00
|
|
|
responseHeaders[HeaderNames.CacheControl] = "public, max-age=" + cacheDuration.Value.TotalSeconds;
|
2013-03-23 22:45:00 -04:00
|
|
|
}
|
2019-02-13 15:08:59 -05:00
|
|
|
else
|
2013-03-23 22:45:00 -04:00
|
|
|
{
|
2019-03-05 13:20:28 -05:00
|
|
|
responseHeaders[HeaderNames.CacheControl] = "public";
|
2019-02-13 15:08:59 -05:00
|
|
|
}
|
|
|
|
|
|
|
|
if (lastModifiedDate.HasValue)
|
|
|
|
{
|
2020-04-13 18:52:43 -04:00
|
|
|
responseHeaders[HeaderNames.LastModified] = lastModifiedDate.Value.ToUniversalTime().ToString(HttpDateFormat, _enUSculture);
|
2013-03-23 22:45:00 -04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
/// Adds the age header.
|
|
|
|
/// </summary>
|
|
|
|
/// <param name="responseHeaders">The responseHeaders.</param>
|
|
|
|
/// <param name="lastDateModified">The last date modified.</param>
|
2019-01-06 15:50:43 -05:00
|
|
|
private static void AddAgeHeader(IDictionary<string, string> responseHeaders, DateTime? lastDateModified)
|
2013-03-23 22:45:00 -04:00
|
|
|
{
|
|
|
|
if (lastDateModified.HasValue)
|
|
|
|
{
|
2019-03-05 13:20:28 -05:00
|
|
|
responseHeaders[HeaderNames.Age] = Convert.ToInt64((DateTime.UtcNow - lastDateModified.Value).TotalSeconds).ToString(CultureInfo.InvariantCulture);
|
2013-03-23 22:45:00 -04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
/// Determines whether [is not modified] [the specified if modified since].
|
|
|
|
/// </summary>
|
|
|
|
/// <param name="ifModifiedSince">If modified since.</param>
|
|
|
|
/// <param name="cacheDuration">Duration of the cache.</param>
|
|
|
|
/// <param name="dateModified">The date modified.</param>
|
|
|
|
/// <returns><c>true</c> if [is not modified] [the specified if modified since]; otherwise, <c>false</c>.</returns>
|
|
|
|
private bool IsNotModified(DateTime ifModifiedSince, TimeSpan? cacheDuration, DateTime? dateModified)
|
|
|
|
{
|
|
|
|
if (dateModified.HasValue)
|
|
|
|
{
|
|
|
|
var lastModified = NormalizeDateForComparison(dateModified.Value);
|
|
|
|
ifModifiedSince = NormalizeDateForComparison(ifModifiedSince);
|
|
|
|
|
|
|
|
return lastModified <= ifModifiedSince;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (cacheDuration.HasValue)
|
|
|
|
{
|
|
|
|
var cacheExpirationDate = ifModifiedSince.Add(cacheDuration.Value);
|
|
|
|
|
|
|
|
if (DateTime.UtcNow < cacheExpirationDate)
|
|
|
|
{
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/// <summary>
|
2020-06-15 18:37:52 -04:00
|
|
|
/// When the browser sends the IfModifiedDate, it's precision is limited to seconds, so this will account for that.
|
2013-03-23 22:45:00 -04:00
|
|
|
/// </summary>
|
|
|
|
/// <param name="date">The date.</param>
|
|
|
|
/// <returns>DateTime.</returns>
|
2019-01-06 15:50:43 -05:00
|
|
|
private static DateTime NormalizeDateForComparison(DateTime date)
|
2013-03-23 22:45:00 -04:00
|
|
|
{
|
|
|
|
return new DateTime(date.Year, date.Month, date.Day, date.Hour, date.Minute, date.Second, date.Kind);
|
|
|
|
}
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
/// Adds the response headers.
|
|
|
|
/// </summary>
|
2016-10-25 15:02:04 -04:00
|
|
|
/// <param name="hasHeaders">The has options.</param>
|
2013-03-23 22:45:00 -04:00
|
|
|
/// <param name="responseHeaders">The response headers.</param>
|
2019-01-06 15:50:43 -05:00
|
|
|
private static void AddResponseHeaders(IHasHeaders hasHeaders, IEnumerable<KeyValuePair<string, string>> responseHeaders)
|
2013-03-23 22:45:00 -04:00
|
|
|
{
|
|
|
|
foreach (var item in responseHeaders)
|
|
|
|
{
|
2016-10-25 15:02:04 -04:00
|
|
|
hasHeaders.Headers[item.Key] = item.Value;
|
2013-03-23 22:45:00 -04:00
|
|
|
}
|
|
|
|
}
|
2013-03-08 12:25:25 -05:00
|
|
|
}
|
2018-12-29 11:26:36 -05:00
|
|
|
}
|