From 2dfb5fd1b8533341fabb859ee95b8ad20da4b707 Mon Sep 17 00:00:00 2001
From: Robert Paciorek <robert@opcode.eu.org>
Date: Sat, 17 Feb 2024 00:28:40 +0000
Subject: [PATCH] better handle proxy cache rename error

---
 src/Middleware/AssetMiddleware.cs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/Middleware/AssetMiddleware.cs b/src/Middleware/AssetMiddleware.cs
index 0a69a7b..ed59369 100644
--- a/src/Middleware/AssetMiddleware.cs
+++ b/src/Middleware/AssetMiddleware.cs
@@ -107,7 +107,13 @@ public class AssetMiddleware
                             }
 
                             // after successfully write data to temporary file, rename it to proper asset filename
-                            File.Move(filePathTmp, filePath);
+                            try {
+                                File.Move(filePathTmp, filePath);
+                            } catch (System.IO.IOException) {
+                                // this can happen for example if two clients request the same file in the same time
+                                // TODO: avoid redundant download in those cases
+                                File.Delete(filePathTmp);
+                            }
                         } else {
                             await inputStream.CopyToAsync(context.Response.Body);
                         }