Fix error on text file not containing us-ascii on first line. (gh-440) (#486)

Closes gh-440

Author: jmathai

elodie/media/text.py

@@ -145,8 +145,13 @@ def parse_metadata_line(self):
         if source is None:
             return None
 
-        with open(source, 'r') as f:
-            first_line = f.readline().strip()
+        try:
+            with open(source, 'r') as f:
+                first_line = f.readline().strip()
+        except UnicodeDecodeError:
+            # Handle non-UTF-8 files by reading with error handling
+            with open(source, 'r', encoding='utf-8', errors='ignore') as f:
+                first_line = f.readline().strip()
 
         try:
             parsed_json = loads(first_line)

elodie/tests/files/cp1252.txt

@@ -0,0 +1,2 @@
+{"title":"Test � file"}
+This is a CP1252 encoded file with special character �

elodie/tests/media/text_test.py

@@ -316,3 +316,16 @@ def test_set_original_name_with_arg():
 
     assert metadata['original_name'] is None, metadata['original_name']
     assert metadata_updated['original_name'] == new_name, metadata_updated['original_name']
+
+def test_parse_metadata_line_with_non_utf8_encoding():
+    # Test for gh-440: Crash on text file NOT containing us-ascii or utf-8 in first line
+    text = Text(helper.get_file('cp1252.txt'))
+    
+    # This should not raise a UnicodeDecodeError
+    # The method should handle non-UTF-8 files gracefully
+    text.parse_metadata_line()
+    
+    # Should be able to get metadata without crashing
+    metadata = text.get_metadata()
+    assert metadata is not None
+    assert metadata['mime_type'] == 'text/plain'