From 80d91087a231831dd24c4e17f8b8bbd1e83cee1e Mon Sep 17 00:00:00 2001
From: Vitaliy <160263432+vitalivo@users.noreply.github.com>
Date: Sat, 12 Sep 2026 17:39:03 +0300
Subject: [PATCH] Decode binary file contents before detecting frontmatter

---
 frontmatter/__init__.py |  1 -
 tests/unit_test.py      | 23 +++++++++++++++++++++++
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/frontmatter/__init__.py b/frontmatter/__init__.py
index 04f4029..bb24b83 100644
--- a/frontmatter/__init__.py
+++ b/frontmatter/__init__.py
@@ -169,7 +169,6 @@ def load(
     else:
         raise ValueError(f"Cannot open filename using type {type(fd)}")
 
-    handler = handler or detect_format(text, handlers)
     return loads(text, encoding, handler, **defaults)
 
 
diff --git a/tests/unit_test.py b/tests/unit_test.py
index 188fb4c..dab28c9 100644
--- a/tests/unit_test.py
+++ b/tests/unit_test.py
@@ -2,6 +2,7 @@
 # -*- coding: utf-8 -*-
 
 import os
+from io import BytesIO, StringIO
 import shutil
 import tempfile
 import textwrap
@@ -27,6 +28,28 @@ class FrontmatterTest(unittest.TestCase):
 
     maxDiff = None
 
+    def test_load_binary_stream(self):
+        text = "---\ntitle: Café\n---\nBonjour"
+        for encoding in ("utf-8", "utf-16"):
+            with self.subTest(encoding=encoding):
+                post = frontmatter.load(BytesIO(text.encode(encoding)), encoding=encoding)
+                self.assertEqual(post.metadata, {"title": "Café"})
+                self.assertEqual(post.content, "Bonjour")
+                self.assertIsInstance(post.handler, YAMLHandler)
+
+        post = frontmatter.load(StringIO(text))
+        self.assertEqual(post.metadata, {"title": "Café"})
+        self.assertEqual(post.content, "Bonjour")
+
+    def test_load_binary_file(self):
+        with tempfile.TemporaryFile("w+b") as stream:
+            stream.write(b'{\n"title": "Hello"\n}\nBody')
+            stream.seek(0)
+            post = frontmatter.load(stream, author="Ada")
+        self.assertEqual(post.metadata, {"title": "Hello", "author": "Ada"})
+        self.assertEqual(post.content, "Body")
+        self.assertIsInstance(post.handler, JSONHandler)
+
     def test_with_markdown_content(self):
         "Parse frontmatter and only the frontmatter"
         post = frontmatter.load("tests/yaml/hello-markdown.md")