Function _filestorage_size

Scripts/ButSystem.py:464–502

Return the size (bytes) of an uploaded FileStorage if possible. We prefer stream seeking because Content-Length is not always available for multipart parts on all clients.

(file_storage)

    if buffered:
        print(f"STARTUP ERRORS FOUND: {len(buffered)}")
        for item in buffered:
            print("\n[ButSystem ERROR] " + item)
    else:
        print("ERROR MONITOR: No errors detected during startup.")
    sys.stdout.flush()

# ---------------------------
# Crypto helpers (TEXT encryption only; binary files stored plaintext)
# ---------------------------

MAGIC = b"BUTSYS1"
NONCE_LEN = 12
TAG_LEN = 16
HDR_LEN = len(MAGIC) + NONCE_LEN + TAG_LEN
CHUNK = 4 * 1024 * 1024  # 4 MiB chunks for fast encrypted streaming (low RAM + good throughput)

def load_or_create_master_key() -> bytes:
    """load_or_create_master_key.

Internal helper function.

This docstring was added automatically to improve maintainability.

Returns:
    Varies.
"""
    if os.path.exists(MASTER_KEY_PATH):
        raw = open(MASTER_KEY_PATH, "rb").read().strip()
        key = base64.urlsafe_b64decode(raw)
        if len(key) != 32:
            raise RuntimeError("Invalid master key length.")
        return key
    key = os.urandom(32)
    with open(MASTER_KEY_PATH, "wb") as f:
        f.write(base64.urlsafe_b64encode(key))
    try:
        os.chmod(MASTER_KEY_PATH, 0o600)
    except Exception:
        pass
    return key

MASTER_KEY = load_or_create_master_key()