Function parse_body_with_consumed 

pub fn parse_body_with_consumed(
    buffer: &[u8],
    body_length: BodyLength,
    config: &BodyConfig,
) -> Result<(Option<Vec<u8>>, usize), BodyError>

Parse a request body and return both the decoded body and bytes consumed.

This is useful for incremental parsing to determine request boundaries.

Errors

Returns an error if:

• The body exceeds the configured size limit
• The chunked encoding is malformed
• The buffer is incomplete