140 lines
4.8 KiB
C#
140 lines
4.8 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;
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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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using Emby.Server.Implementations.HttpServer;
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using MediaBrowser.Model.Services;
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using Microsoft.AspNetCore.Http;
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namespace Emby.Server.Implementations.Services
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{
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public static class ResponseHelper
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{
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public static Task WriteToResponse(HttpResponse response, IRequest request, object result, CancellationToken cancellationToken)
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{
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if (result == null)
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{
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if (response.StatusCode == (int)HttpStatusCode.OK)
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{
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response.StatusCode = (int)HttpStatusCode.NoContent;
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}
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response.ContentLength = 0;
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return Task.CompletedTask;
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}
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var httpResult = result as IHttpResult;
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if (httpResult != null)
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{
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httpResult.RequestContext = request;
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request.ResponseContentType = httpResult.ContentType ?? request.ResponseContentType;
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}
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var defaultContentType = request.ResponseContentType;
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if (httpResult != null)
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{
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if (httpResult.RequestContext == null)
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httpResult.RequestContext = request;
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response.StatusCode = httpResult.Status;
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}
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if (result is IHasHeaders responseOptions)
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{
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foreach (var responseHeaders in responseOptions.Headers)
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{
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if (string.Equals(responseHeaders.Key, "Content-Length", StringComparison.OrdinalIgnoreCase))
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{
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response.ContentLength = long.Parse(responseHeaders.Value, CultureInfo.InvariantCulture);
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continue;
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}
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response.Headers.Add(responseHeaders.Key, responseHeaders.Value);
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}
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}
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//ContentType='text/html' is the default for a HttpResponse
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//Do not override if another has been set
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if (response.ContentType == null || response.ContentType == "text/html")
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{
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response.ContentType = defaultContentType;
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}
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if (response.ContentType == "application/json")
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{
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response.ContentType += "; charset=utf-8";
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}
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switch (result)
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{
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case IAsyncStreamWriter asyncStreamWriter:
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return asyncStreamWriter.WriteToAsync(response.Body, cancellationToken);
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case IStreamWriter streamWriter:
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streamWriter.WriteTo(response.Body);
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return Task.CompletedTask;
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case FileWriter fileWriter:
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return fileWriter.WriteToAsync(response, cancellationToken);
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case Stream stream:
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return CopyStream(stream, response.Body);
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case byte[] bytes:
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response.ContentType = "application/octet-stream";
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response.ContentLength = bytes.Length;
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if (bytes.Length > 0)
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{
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return response.Body.WriteAsync(bytes, 0, bytes.Length, cancellationToken);
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}
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return Task.CompletedTask;
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case string responseText:
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var responseTextAsBytes = Encoding.UTF8.GetBytes(responseText);
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response.ContentLength = responseTextAsBytes.Length;
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if (responseTextAsBytes.Length > 0)
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{
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return response.Body.WriteAsync(responseTextAsBytes, 0, responseTextAsBytes.Length, cancellationToken);
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}
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return Task.CompletedTask;
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}
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return WriteObject(request, result, response);
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}
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private static async Task CopyStream(Stream src, Stream dest)
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{
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using (src)
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{
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await src.CopyToAsync(dest).ConfigureAwait(false);
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}
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}
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public static async Task WriteObject(IRequest request, object result, HttpResponse response)
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{
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var contentType = request.ResponseContentType;
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var serializer = RequestHelper.GetResponseWriter(HttpListenerHost.Instance, contentType);
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using (var ms = new MemoryStream())
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{
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serializer(result, ms);
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ms.Position = 0;
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var contentLength = ms.Length;
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response.ContentLength = contentLength;
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if (contentLength > 0)
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{
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await ms.CopyToAsync(response.Body).ConfigureAwait(false);
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}
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}
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}
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}
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}
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