From 2edd421354752f65be8d9974b5b04bb20d1df72c Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Fri, 26 Apr 2019 14:04:24 +0800
Subject: Test user existence in get avatar.

---
 Timeline/Controllers/UserController.cs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Timeline/Controllers/UserController.cs b/Timeline/Controllers/UserController.cs
index 1231befb..eaa205de 100644
--- a/Timeline/Controllers/UserController.cs
+++ b/Timeline/Controllers/UserController.cs
@@ -82,7 +82,10 @@ namespace Timeline.Controllers
         [HttpGet("user/{username}/avatar"), Authorize]
         public async Task<IActionResult> GetAvatar([FromRoute] string username)
         {
-            // TODO: test user existence.
+            var existence = (await _userService.GetUser(username)) != null;
+            if (!existence)
+                return NotFound();
+
             var url = await _userService.GetAvatarUrl(username);
             return Redirect(url);
         }
-- 
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