1 files changed, 179 insertions, 0 deletions
diff --git a/Emby.Server.Implementations/Services/ResponseHelper.cs b/Emby.Server.Implementations/Services/ResponseHelper.cs
new file mode 100644
index 000000000..d4ce1cabf
--- /dev/null
+++ b/Emby.Server.Implementations/Services/ResponseHelper.cs
@@ -0,0 +1,179 @@
+using System;
+using System.Collections.Generic;
+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;
+
+namespace Emby.Server.Implementations.Services
+{
+    public static class ResponseHelper
+    {
+        private 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)
+            {
+                using (stream)
+                {
+                    await stream.CopyToAsync(response.OutputStream).ConfigureAwait(false);
+                    return true;
+                }
+            }
+
+            var bytes = result as byte[];
+            if (bytes != null)
+            {
+                response.ContentType = "application/octet-stream";
+                response.SetContentLength(bytes.Length);
+
+                await response.OutputStream.WriteAsync(bytes, 0, bytes.Length).ConfigureAwait(false);
+                return true;
+            }
+
+            return false;
+        }
+
+        public static Task WriteToResponse(IResponse httpRes, IRequest httpReq, object result)
+        {
+            if (result == null)
+            {
+                if (httpRes.StatusCode == (int)HttpStatusCode.OK)
+                {
+                    httpRes.StatusCode = (int)HttpStatusCode.NoContent;
+                }
+
+                httpRes.SetContentLength(0);
+                return Task.FromResult(true);
+            }
+
+            var httpResult = result as IHttpResult;
+            if (httpResult != null)
+            {
+                httpResult.RequestContext = httpReq;
+                httpReq.ResponseContentType = httpResult.ContentType ?? httpReq.ResponseContentType;
+                return WriteToResponseInternal(httpRes, httpResult, httpReq);
+            }
+
+            return WriteToResponseInternal(httpRes, result, httpReq);
+        }
+
+        /// <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="request">The serialization context.</param>
+        /// <returns></returns>
+        private static async Task WriteToResponseInternal(IResponse response, object result, IRequest request)
+        {
+            var defaultContentType = request.ResponseContentType;
+
+            var httpResult = result as IHttpResult;
+            if (httpResult != null)
+            {
+                if (httpResult.RequestContext == null)
+                    httpResult.RequestContext = request;
+
+                response.StatusCode = httpResult.Status;
+                response.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);
+                        }
+                    }
+                }
+            }
+
+            var responseOptions = result as IHasHeaders;
+            if (responseOptions != null)
+            {
+                foreach (var responseHeaders in responseOptions.Headers)
+                {
+                    if (string.Equals(responseHeaders.Key, "Content-Length", StringComparison.OrdinalIgnoreCase))
+                    {
+                        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 writeToOutputStreamResult = await WriteToOutputStream(response, result).ConfigureAwait(false);
+            if (writeToOutputStreamResult)
+            {
+                return;
+            }
+
+            var responseText = result as string;
+            if (responseText != null)
+            {
+                var bytes = Encoding.UTF8.GetBytes(responseText);
+                response.SetContentLength(bytes.Length);
+                await response.OutputStream.WriteAsync(bytes, 0, bytes.Length).ConfigureAwait(false);
+                return;
+            }
+
+            await WriteObject(request, result, response).ConfigureAwait(false);
+        }
+
+        public static async Task WriteObject(IRequest request, object result, IResponse response)
+        {
+            var contentType = request.ResponseContentType;
+            var serializer = RequestHelper.GetResponseWriter(HttpListenerHost.Instance, contentType);
+            
+            using (var ms = new MemoryStream())
+            {
+                serializer(result, ms);
+
+                ms.Position = 0;
+                response.SetContentLength(ms.Length);
+                await ms.CopyToAsync(response.OutputStream).ConfigureAwait(false);
+            }
+
+            //serializer(result, outputStream);
+        }
+    }
+}