jellyfin/ServiceStack/HttpResponseExtensionsInternal.cs

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C#
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2016-11-11 19:55:12 +00:00
//Copyright (c) Service Stack LLC. All Rights Reserved.
//License: https://raw.github.com/ServiceStack/ServiceStack/master/license.txt
using System;
using System.IO;
using System.Net;
using System.Threading.Tasks;
using System.Collections.Generic;
using System.Threading;
using MediaBrowser.Model.Services;
using ServiceStack.Host;
namespace ServiceStack
{
public static class HttpResponseExtensionsInternal
{
public static async Task<bool> WriteToOutputStream(IResponse response, object result)
{
var asyncStreamWriter = result as IAsyncStreamWriter;
if (asyncStreamWriter != null)
{
await asyncStreamWriter.WriteToAsync(response.OutputStream, CancellationToken.None).ConfigureAwait(false);
return true;
}
var streamWriter = result as IStreamWriter;
if (streamWriter != null)
{
streamWriter.WriteTo(response.OutputStream);
return true;
}
var stream = result as Stream;
if (stream != null)
{
WriteTo(stream, response.OutputStream);
return true;
}
var bytes = result as byte[];
if (bytes != null)
{
response.ContentType = "application/octet-stream";
response.SetContentLength(bytes.Length);
response.OutputStream.Write(bytes, 0, bytes.Length);
return true;
}
return false;
}
public static long WriteTo(Stream inStream, Stream outStream)
{
var memoryStream = inStream as MemoryStream;
if (memoryStream != null)
{
memoryStream.WriteTo(outStream);
return memoryStream.Position;
}
var data = new byte[4096];
long total = 0;
int bytesRead;
while ((bytesRead = inStream.Read(data, 0, data.Length)) > 0)
{
outStream.Write(data, 0, bytesRead);
total += bytesRead;
}
return total;
}
/// <summary>
/// End a ServiceStack Request with no content
/// </summary>
public static void EndRequestWithNoContent(this IResponse httpRes)
{
if (httpRes.StatusCode == (int)HttpStatusCode.OK)
{
httpRes.StatusCode = (int)HttpStatusCode.NoContent;
}
httpRes.SetContentLength(0);
}
public static Task WriteToResponse(this IResponse httpRes, MediaBrowser.Model.Services.IRequest httpReq, object result)
{
if (result == null)
{
httpRes.EndRequestWithNoContent();
return Task.FromResult(true);
}
var httpResult = result as IHttpResult;
if (httpResult != null)
{
httpResult.RequestContext = httpReq;
httpReq.ResponseContentType = httpResult.ContentType ?? httpReq.ResponseContentType;
var httpResSerializer = ContentTypes.Instance.GetResponseSerializer(httpReq.ResponseContentType);
return httpRes.WriteToResponse(httpResult, httpResSerializer, httpReq);
}
var serializer = ContentTypes.Instance.GetResponseSerializer(httpReq.ResponseContentType);
return httpRes.WriteToResponse(result, serializer, httpReq);
}
private static object GetDto(object response)
{
if (response == null) return null;
var httpResult = response as IHttpResult;
return httpResult != null ? httpResult.Response : response;
}
/// <summary>
/// Writes to response.
/// Response headers are customizable by implementing IHasHeaders an returning Dictionary of Http headers.
/// </summary>
/// <param name="response">The response.</param>
/// <param name="result">Whether or not it was implicity handled by ServiceStack's built-in handlers.</param>
/// <param name="defaultAction">The default action.</param>
/// <param name="request">The serialization context.</param>
/// <returns></returns>
public static async Task WriteToResponse(this IResponse response, object result, Action<IRequest, object, IResponse> defaultAction, MediaBrowser.Model.Services.IRequest request)
{
var defaultContentType = request.ResponseContentType;
if (result == null)
{
response.EndRequestWithNoContent();
return;
}
var httpResult = result as IHttpResult;
if (httpResult != null)
{
if (httpResult.RequestContext == null)
httpResult.RequestContext = request;
response.Dto = response.Dto ?? GetDto(httpResult);
response.StatusCode = httpResult.Status;
response.StatusDescription = httpResult.StatusDescription ?? httpResult.StatusCode.ToString();
if (string.IsNullOrEmpty(httpResult.ContentType))
{
httpResult.ContentType = defaultContentType;
}
response.ContentType = httpResult.ContentType;
if (httpResult.Cookies != null)
{
var httpRes = response as IHttpResponse;
if (httpRes != null)
{
foreach (var cookie in httpResult.Cookies)
{
httpRes.SetCookie(cookie);
}
}
}
}
else
{
response.Dto = result;
}
/* Mono Error: Exception: Method not found: 'System.Web.HttpResponse.get_Headers' */
var responseOptions = result as IHasHeaders;
if (responseOptions != null)
{
//Reserving options with keys in the format 'xx.xxx' (No Http headers contain a '.' so its a safe restriction)
const string reservedOptions = ".";
foreach (var responseHeaders in responseOptions.Headers)
{
if (responseHeaders.Key.Contains(reservedOptions)) continue;
if (responseHeaders.Key == "Content-Length")
{
response.SetContentLength(long.Parse(responseHeaders.Value));
continue;
}
response.AddHeader(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 (new HashSet<string> { "application/json", }.Contains(response.ContentType))
{
response.ContentType += "; charset=utf-8";
}
var disposableResult = result as IDisposable;
var writeToOutputStreamResult = await WriteToOutputStream(response, result).ConfigureAwait(false);
if (writeToOutputStreamResult)
{
response.Flush(); //required for Compression
if (disposableResult != null) disposableResult.Dispose();
return;
}
if (httpResult != null)
result = httpResult.Response;
var responseText = result as string;
if (responseText != null)
{
if (response.ContentType == null || response.ContentType == "text/html")
response.ContentType = defaultContentType;
response.Write(responseText);
return;
}
if (defaultAction == null)
{
throw new ArgumentNullException("defaultAction", String.Format(
"As result '{0}' is not a supported responseType, a defaultAction must be supplied",
(result != null ? result.GetType().GetOperationName() : "")));
}
if (result != null)
defaultAction(request, result, response);
if (disposableResult != null)
disposableResult.Dispose();
}
}
}