Added ability to write response data directly to Stream.

RestSharp.IntegrationTests/FileTests.cs

@@ -11,7 +11,7 @@ public class FileTests
 		public void Handles_Binary_File_Download()
 		{
 			const string baseUrl = "http://localhost:8080/";
-			using(SimpleServer.Create(baseUrl, Handlers.FileHandler))
+			using (SimpleServer.Create(baseUrl, Handlers.FileHandler))
 			{
 				var client = new RestClient(baseUrl);
 				var request = new RestRequest("Assets/Koala.jpg");
@@ -21,5 +21,26 @@ public void Handles_Binary_File_Download()
 				Assert.Equal(expected, response);
 			}
 		}
+
+		[Fact]
+		public void Writes_Response_To_Stream()
+		{
+			const string baseUrl = "http://localhost:8080/";
+			using (SimpleServer.Create(baseUrl, Handlers.FileHandler))
+			{
+				string tempFile = Path.GetTempFileName();
+				using (var writer = File.OpenWrite(tempFile))
+				{
+					var client = new RestClient(baseUrl);
+					var request = new RestRequest("Assets/Koala.jpg");
+					request.ResponseWriter = (responseStream) => responseStream.CopyTo(writer);
+					var response = client.DownloadData(request);
+					Assert.Null(response);
+				}
+				var fromTemp = File.ReadAllBytes(tempFile);
+				var expected = File.ReadAllBytes(Environment.CurrentDirectory + "\\Assets\\Koala.jpg");
+				Assert.Equal(expected, fromTemp);
+			}
+		}
 	}
-}
+}

RestSharp/Http.cs

@@ -19,8 +19,8 @@
 using System.IO;
 using System.Linq;
 using System.Net;
-using System.Text;
 using System.Security.Cryptography.X509Certificates;
+using System.Text;
 using RestSharp.Extensions;
 
 #if WINDOWS_PHONE
@@ -107,6 +107,10 @@ protected bool HasFiles
 		/// </summary>
 		public CookieContainer CookieContainer { get; set; }
 		/// <summary>
+		/// The method to use to write the response instead of reading into RawBytes
+		/// </summary>
+		public Action<Stream> ResponseWriter { get; set; }
+		/// <summary>
 		/// Collection of files to be sent with request
 		/// </summary>
 		public IList<HttpFile> Files { get; private set; }
@@ -326,7 +330,7 @@ private void WriteMultipartFormData(Stream requestStream)
 			WriteStringTo(requestStream, GetMultipartFooter());
 		}
 
-		private static void ExtractResponseData(HttpResponse response, HttpWebResponse webResponse)
+		private void ExtractResponseData(HttpResponse response, HttpWebResponse webResponse)
 		{
 			using (webResponse)
 			{
@@ -337,14 +341,41 @@ private static void ExtractResponseData(HttpResponse response, HttpWebResponse w
 				response.ContentType = webResponse.ContentType;
 				response.ContentLength = webResponse.ContentLength;
 #if WINDOWS_PHONE
+				Stream responseStream = webResponse.GetResponseStream();
 				if (string.Equals(webResponse.Headers[HttpRequestHeader.ContentEncoding], "gzip", StringComparison.OrdinalIgnoreCase))
-					response.RawBytes = new GZipStream(webResponse.GetResponseStream()).ReadAsBytes();
+				{
+					var gzStream = new GZipStream(responseStream);
+					if (ResponseWriter == null)
+					{
+						response.RawBytes = gzStream.ReadAsBytes();
+					}
+					else
+					{
+						ResponseWriter(gzStream);
+					}
+				}
 				else
-					response.RawBytes = webResponse.GetResponseStream().ReadAsBytes();
+				{
+					if (ResponseWriter == null)
+					{
+						response.RawBytes = responseStream.ReadAsBytes();
+					}
+					else
+					{
+						ResponseWriter(responseStream);
+					}
+				}
 #else
-				response.RawBytes = webResponse.GetResponseStream().ReadAsBytes();
+				Stream responseStream = webResponse.GetResponseStream();
+				if (ResponseWriter == null)
+				{
+					response.RawBytes = responseStream.ReadAsBytes();
+				}
+				else
+				{
+					ResponseWriter(responseStream);
+				}
 #endif
-				//response.Content = GetString(response.RawBytes);
 				response.StatusCode = webResponse.StatusCode;
 				response.StatusDescription = webResponse.StatusDescription;
 				response.ResponseUri = webResponse.ResponseUri;

RestSharp/IHttp.cs

@@ -16,14 +16,15 @@
 
 using System;
 using System.Collections.Generic;
-using System.Net;
 using System.IO;
+using System.Net;
 using System.Security.Cryptography.X509Certificates;
 
 namespace RestSharp
 {
 	public interface IHttp
 	{
+		Action<Stream> ResponseWriter { get; set; }
 		CookieContainer CookieContainer { get; set; }
 		ICredentials Credentials { get; set; }
 		string UserAgent { get; set; }
@@ -62,9 +63,9 @@ public interface IHttp
 		HttpResponse Options();
 		HttpResponse Post();
 		HttpResponse Put();
-        HttpResponse Patch();
-        HttpResponse AsPost(string httpMethod);
-        HttpResponse AsGet(string httpMethod);
+		HttpResponse Patch();
+		HttpResponse AsPost(string httpMethod);
+		HttpResponse AsGet(string httpMethod);
 
 		IWebProxy Proxy { get; set; }
 #endif

RestSharp/IRestRequest.cs

@@ -16,6 +16,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Net;
 using RestSharp.Serializers;
 
@@ -35,6 +36,11 @@ public interface IRestRequest
 		/// </summary>
 		ISerializer XmlSerializer { get; set; }
 
+		/// <summary>
+		/// Set this to write response to Stream rather than reading into memory.
+		/// </summary>
+		Action<Stream> ResponseWriter { get; set; }
+
 		/// <summary>
 		/// Container of all HTTP parameters to be passed with the request. 
 		/// See AddParameter() for explanation of the types of parameters that can be passed

RestSharp/RestClient.cs

@@ -282,6 +282,8 @@ private void ConfigureHttp(IRestRequest request, IHttp http)
 		{
 			http.CookieContainer = CookieContainer;
 
+			http.ResponseWriter = request.ResponseWriter;
+
 			// move RestClient.DefaultParameters into Request.Parameters
 			foreach(var p in DefaultParameters)
 			{

RestSharp/RestRequest.cs

@@ -41,6 +41,11 @@ public class RestRequest : IRestRequest
 		/// </summary>
 		public ISerializer XmlSerializer { get; set; }
 
+		/// <summary>
+		/// Set this to write response to Stream rather than reading into memory.
+		/// </summary>
+		public Action<Stream> ResponseWriter { get; set; }
+
 		/// <summary>
 		/// Default constructor
 		/// </summary>