Module util 

Small string helpers without external dependencies.

Functions

content_disposition

Content-Disposition value that forces a download and keeps non-ASCII file names intact (RFC 6266 / RFC 5987).

csv_field

Escapes a CSV field (RFC 4180). Fields starting with characters that spreadsheet programs interpret as formulas are prefixed with '.

format_bytes

Human readable byte size (binary units).

format_number

Formats a number with up to decimals decimals, trimming trailing zeros.

pct_encode

Percent-encodes everything except RFC 3986 unreserved characters.

safe_redirect_target

Only accept local, absolute paths as redirect targets (prevents open redirects via ?next=https://evil.example).

sanitize_filename

Reduces an uploaded file name to a safe base name.