Changed SaveAs(string) to Save(Stream)

Author: khellang

src/Microsoft.AspNet.Http.Abstractions/IFormFile.cs

@@ -50,14 +50,14 @@ public interface IFormFile
         /// <summary>
         /// Saves the contents of the uploaded file.
         /// </summary>
-        /// <param name="path">The path of the file to create.</param>
-        void SaveAs(string path);
+        /// <param name="target">The stream to save the file to.</param>
+        void Save(Stream target);
 
         /// <summary>
         /// Asynchronously saves the contents of the uploaded file.
         /// </summary>
-        /// <param name="path">The path of the file to create.</param>
+        /// <param name="target">The stream to save the file to.</param>
         /// <param name="cancellationToken"></param>
-        Task SaveAsAsync(string path, CancellationToken cancellationToken = default(CancellationToken));
+        Task SaveAsync(Stream target, CancellationToken cancellationToken = default(CancellationToken));
     }
 }

src/Microsoft.AspNet.Http.Extensions/FormFileExtensions.cs

@@ -0,0 +1,42 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System.IO;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Microsoft.AspNet.Http.Extensions
+{
+    public static class FormFileExtensions
+    {
+        // Stream.CopyTo method uses 80KB as the default buffer size.
+        private const int DefaultBufferSize = 80 * 1024;
+
+        /// <summary>
+        /// Saves the contents of the uploaded file.
+        /// </summary>
+        /// <param name="file">The file to save.</param>
+        /// <param name="path">The path of the file to create.</param>
+        public static void SaveAs(this IFormFile file, string path)
+        {
+            using (var fileStream = File.Create(path, DefaultBufferSize))
+            {
+                file.Save(fileStream);
+            }
+        }
+
+        /// <summary>
+        /// Asynchronously saves the contents of the uploaded file.
+        /// </summary>
+        /// <param name="file">The file to save.</param>
+        /// <param name="path">The path of the file to create.</param>
+        /// <param name="cancellationToken"></param>
+        public static async Task SaveAsAsync(this IFormFile file, string path, CancellationToken cancellationToken = default(CancellationToken))
+        {
+            using (var fileStream = File.Create(path, DefaultBufferSize, FileOptions.Asynchronous))
+            {
+                await file.SaveAsync(fileStream, cancellationToken);
+            }
+        }
+    }
+}

src/Microsoft.AspNet.Http/Features/FormFile.cs

@@ -74,28 +74,20 @@ public Stream OpenReadStream()
         /// <summary>
         /// Saves the contents of the uploaded file.
         /// </summary>
-        /// <param name="path">The path of the file to create.</param>
-        public void SaveAs(string path)
+        /// <param name="target">The stream to save the file to.</param>
+        public void Save(Stream target)
         {
-            using (var fileStream = File.Create(path, DefaultBufferSize))
-            {
-                var inputStream = OpenReadStream();
-                inputStream.CopyTo(fileStream, DefaultBufferSize);
-            }
+            OpenReadStream().CopyTo(target, DefaultBufferSize);
         }
 
         /// <summary>
         /// Asynchronously saves the contents of the uploaded file.
         /// </summary>
-        /// <param name="path">The path of the file to create.</param>
+        /// <param name="target">The stream to save the file to.</param>
         /// <param name="cancellationToken"></param>
-        public async Task SaveAsAsync(string path, CancellationToken cancellationToken = default(CancellationToken))
+        public async Task SaveAsync(Stream target, CancellationToken cancellationToken = default(CancellationToken))
         {
-            using (var fileStream = File.Create(path, DefaultBufferSize, FileOptions.Asynchronous))
-            {
-                var inputStream = OpenReadStream();
-                await inputStream.CopyToAsync(fileStream, DefaultBufferSize, cancellationToken);
-            }
+            await OpenReadStream().CopyToAsync(target, DefaultBufferSize, cancellationToken);
         }
     }
 }