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#pragma warning disable CS1591
using System;
using System.Globalization;
using System.IO;
using System.Net;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Emby.Server.Implementations.HttpServer;
using MediaBrowser.Model.Services;
using Microsoft.AspNetCore.Http;
namespace Emby.Server.Implementations.Services
{
public static class ResponseHelper
{
public static Task WriteToResponse(HttpResponse response, IRequest request, object result, CancellationToken cancellationToken)
{
if (result == null)
{
if (response.StatusCode == (int)HttpStatusCode.OK)
{
response.StatusCode = (int)HttpStatusCode.NoContent;
}
response.ContentLength = 0;
return Task.CompletedTask;
}
var httpResult = result as IHttpResult;
if (httpResult != null)
{
httpResult.RequestContext = request;
request.ResponseContentType = httpResult.ContentType ?? request.ResponseContentType;
}
var defaultContentType = request.ResponseContentType;
if (httpResult != null)
{
if (httpResult.RequestContext == null)
{
httpResult.RequestContext = request;
}
response.StatusCode = httpResult.Status;
}
if (result is IHasHeaders responseOptions)
{
foreach (var responseHeaders in responseOptions.Headers)
{
if (string.Equals(responseHeaders.Key, "Content-Length", StringComparison.OrdinalIgnoreCase))
{
response.ContentLength = long.Parse(responseHeaders.Value, CultureInfo.InvariantCulture);
continue;
}
response.Headers.Add(responseHeaders.Key, responseHeaders.Value);
}
}
// ContentType='text/html' is the default for a HttpResponse
// Do not override if another has been set
if (response.ContentType == null || response.ContentType == "text/html")
{
response.ContentType = defaultContentType;
}
if (response.ContentType == "application/json")
{
response.ContentType += "; charset=utf-8";
}
switch (result)
{
case IAsyncStreamWriter asyncStreamWriter:
return asyncStreamWriter.WriteToAsync(response.Body, cancellationToken);
case IStreamWriter streamWriter:
streamWriter.WriteTo(response.Body);
return Task.CompletedTask;
case FileWriter fileWriter:
return fileWriter.WriteToAsync(response, cancellationToken);
case Stream stream:
return CopyStream(stream, response.Body);
case byte[] bytes:
response.ContentType = "application/octet-stream";
response.ContentLength = bytes.Length;
if (bytes.Length > 0)
{
return response.Body.WriteAsync(bytes, 0, bytes.Length, cancellationToken);
}
return Task.CompletedTask;
case string responseText:
var responseTextAsBytes = Encoding.UTF8.GetBytes(responseText);
response.ContentLength = responseTextAsBytes.Length;
if (responseTextAsBytes.Length > 0)
{
return response.Body.WriteAsync(responseTextAsBytes, 0, responseTextAsBytes.Length, cancellationToken);
}
return Task.CompletedTask;
}
return WriteObject(request, result, response);
}
private static async Task CopyStream(Stream src, Stream dest)
{
using (src)
{
await src.CopyToAsync(dest).ConfigureAwait(false);
}
}
public static async Task WriteObject(IRequest request, object result, HttpResponse response)
{
var contentType = request.ResponseContentType;
var serializer = RequestHelper.GetResponseWriter(HttpListenerHost.Instance, contentType);
using (var ms = new MemoryStream())
{
serializer(result, ms);
ms.Position = 0;
var contentLength = ms.Length;
response.ContentLength = contentLength;
if (contentLength > 0)
{
await ms.CopyToAsync(response.Body).ConfigureAwait(false);
}
}
}
}
}
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