From 65b54eb5d3dc44dbcfed1a422b61212bbff6cd39 Mon Sep 17 00:00:00 2001
From: oneRain <onerain88@gmail.com>
Date: Tue, 27 Aug 2019 17:05:49 +0800
Subject: [PATCH] =?UTF-8?q?*=20FileTest.cs:=20chore:=20=E5=A2=9E=E5=8A=A0?=
 =?UTF-8?q?=E5=9B=BE=E7=89=87=E7=BC=A9=E7=95=A5=E5=9B=BE=E6=8E=A5=E5=8F=A3?=
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* AVFile.cs:
---
 Storage/Storage.Test/FileTest.cs | 8 ++++++++
 Storage/Storage/Public/AVFile.cs | 8 +++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/Storage/Storage.Test/FileTest.cs b/Storage/Storage.Test/FileTest.cs
index 2e5c287..e82d57b 100644
--- a/Storage/Storage.Test/FileTest.cs
+++ b/Storage/Storage.Test/FileTest.cs
@@ -27,5 +27,13 @@ namespace LeanCloudTests {
             Assert.NotNull(file.ObjectId);
             TestContext.Out.WriteLine($"file: {file.ObjectId}, {file.Url}");
         }
+
+        [Test]
+        public async Task Thumbnail() {
+            AVFile file = await AVFile.GetFileWithObjectIdAsync("5d64ac55d5de2b006c1fe3d8");
+            Assert.NotNull(file);
+            TestContext.Out.WriteLine($"url: {file.Url}");
+            TestContext.Out.WriteLine($"thumbnail url: {file.GetThumbnailUrl(28, 28)}");
+        }
     }
 }
diff --git a/Storage/Storage/Public/AVFile.cs b/Storage/Storage/Public/AVFile.cs
index d2f4cbe..3d05878 100644
--- a/Storage/Storage/Public/AVFile.cs
+++ b/Storage/Storage/Public/AVFile.cs
@@ -243,6 +243,12 @@ namespace LeanCloud {
             }
         }
 
+        public string GetThumbnailUrl(int width, int height,
+            int quality = 100, bool scaleToFit = true, string format = "png") {
+            int mode = scaleToFit ? 2 : 1;
+            return $"{Url}?imageView/{mode}/w/{width}/h/{height}/q/{quality}/format/{format}";
+        }
+
         internal static AVFileController FileController {
             get {
                 return AVPlugins.Instance.FileController;
@@ -587,7 +593,7 @@ namespace LeanCloud {
         /// <remarks>获取之后并没有实际执行下载，只是加载了文件的元信息以及物理地址（Url）
         /// </remarks>
         public static Task<AVFile> GetFileWithObjectIdAsync(string objectId, CancellationToken cancellationToken) {
-            string currentSessionToken = AVUser.CurrentUser.SessionToken;
+            string currentSessionToken = AVUser.CurrentUser?.SessionToken;
             return FileController.GetAsync(objectId, currentSessionToken, cancellationToken).OnSuccess(_ => {
                 var filestate = _.Result;
                 return new AVFile(filestate);