migration

SimpleToolkit.Extensions/HttpClientExtensions.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SimpleToolkit.Extensions
+{
+    public static class HttpClientExtensions
+    {
+        public static async Task DownloadAsync(this HttpClient client, string requestUri, Stream destination, CancellationToken cancellationToken = default, IProgress<double> progress = null)
+        {
+            using (HttpResponseMessage response = await client.GetAsync(requestUri, HttpCompletionOption.ResponseHeadersRead))
+            {
+                long? contentLength = response.Content.Headers.ContentLength;
+
+                using (Stream download = await response.Content.ReadAsStreamAsync(cancellationToken))
+                {
+                    if (progress == null || !contentLength.HasValue)
+                    {
+                        await download.CopyToAsync(destination);
+                        return;
+                    }
+
+                    var relativeProgress = new Progress<long>(totalBytes => progress.Report((double)totalBytes * 100 / contentLength.Value));
+                    await download.CopyToAsync(destination, 81920, relativeProgress, cancellationToken);
+                    progress.Report(100);
+                }
+            }
+        }
+    }
+}