From 10aad31b32a7dd3f6f54822f66c72ab5cde75f6a Mon Sep 17 00:00:00 2001
From: Jakub Trllo <43494761+iLLiCiTiT@users.noreply.github.com>
Date: Fri, 11 Apr 2025 15:07:39 +0200
Subject: [PATCH 1/2] fix jpeg detection

---
 ayon_api/utils.py | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/ayon_api/utils.py b/ayon_api/utils.py
index bd391b3cb..11d5c8d99 100644
--- a/ayon_api/utils.py
+++ b/ayon_api/utils.py
@@ -855,11 +855,11 @@ def _get_media_mime_type_for_content_base(content: bytes) -> Optional[str]:
     if content[0:4] == b"\211PNG":
         return "image/png"
 
-    # JPEG, JFIF or Exif
-    if (
-        content[0:4] == b"\xff\xd8\xff\xdb"
-        or content[6:10] in (b"JFIF", b"Exif")
-    ):
+    # JPEG
+    # - [0:2] is constant b"\xff\xd8"
+    # - [2:4] Marker identifier b"\xff{?}"
+    # NOTE: File ends with b"\xff\xd9"
+    if content[0:3] == b"\xff\xd8\xff":
         return "image/jpeg"
 
     # Webp

From 73c2d8d38a61b1daf4d06b6bd9ed90976d7b2c98 Mon Sep 17 00:00:00 2001
From: Jakub Trllo <43494761+iLLiCiTiT@users.noreply.github.com>
Date: Fri, 11 Apr 2025 15:08:24 +0200
Subject: [PATCH 2/2] added references

---
 ayon_api/utils.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ayon_api/utils.py b/ayon_api/utils.py
index 11d5c8d99..5529f121f 100644
--- a/ayon_api/utils.py
+++ b/ayon_api/utils.py
@@ -857,7 +857,9 @@ def _get_media_mime_type_for_content_base(content: bytes) -> Optional[str]:
 
     # JPEG
     # - [0:2] is constant b"\xff\xd8"
+    #   (ref. https://www.file-recovery.com/jpg-signature-format.htm)
     # - [2:4] Marker identifier b"\xff{?}"
+    #   (ref. https://www.disktuna.com/list-of-jpeg-markers/)
     # NOTE: File ends with b"\xff\xd9"
     if content[0:3] == b"\xff\xd8\xff":
         return "image/jpeg"