Fixes #604

VERSION

@@ -1 +1 @@
-4.1.11-develop1
+4.1.11-develop2

modules/util.py

@@ -652,7 +652,7 @@ def get_root_files(root_dir, remote_dir, exclude_dir=None):
 
 def load_json(file):
     """Load json file if exists"""
-    if os.path.isfile(file):
+    if os.path.isfile(truncate_filename(file)):
         file = open(file)
         data = json.load(file)
         file.close()
@@ -661,10 +661,48 @@ def load_json(file):
     return data
 
 
+def truncate_filename(filename, max_length=255, offset=0):
+    """
+    Truncate filename if necessary.
+
+    Args:
+        filename (str): The original filename.
+        max_length (int, optional): The maximum length of the truncated filename. Defaults to 255.
+        offset (int, optional): The number of characters to keep from the end of the base name. Defaults to 0.
+
+    Returns:
+        str: The truncated filename.
+
+    """
+    base, ext = os.path.splitext(filename)
+    if len(filename) > max_length:
+        max_base_length = max_length - len(ext) - offset
+        truncated_base = base[:max_base_length]
+        truncated_base_offset = base[-offset:] if offset > 0 else ""
+        truncated_filename = f"{truncated_base}{truncated_base_offset}{ext}"
+    else:
+        truncated_filename = filename
+    return truncated_filename
+
+
 def save_json(torrent_json, dest):
-    """Save json file to destination"""
-    with open(dest, "w", encoding="utf-8") as file:
-        json.dump(torrent_json, file, ensure_ascii=False, indent=4)
+    """Save json file to destination, truncating filename if necessary."""
+    max_filename_length = 255  # Typical maximum filename length on many filesystems
+    directory, filename = os.path.split(dest)
+    filename, ext = os.path.splitext(filename)
+
+    if len(filename) > (max_filename_length - len(ext)):
+        truncated_filename = truncate_filename(filename, max_filename_length)
+        dest = os.path.join(directory, truncated_filename)
+        logger.warning(f"Filename too long, truncated to: {dest}")
+
+    try:
+        with open(dest, "w", encoding="utf-8") as file:
+            json.dump(torrent_json, file, ensure_ascii=False, indent=4)
+    except FileNotFoundError as e:
+        logger.error(f"Failed to save JSON file: {e.filename} - {e.strerror}.")
+    except OSError as e:
+        logger.error(f"OS error occurred: {e.filename} - {e.strerror}.")
 
 
 class GracefulKiller: