Struct LengthCheck 

pub struct LengthCheck { /* private fields */ }

Built-in IntegrityCheck that fails when the number of bytes read does not match the length advertised by the object store (Content-Length for S3, object size for GCS). Catches a cleanly-truncated transfer that would otherwise be accepted as a complete object.

Implementations

impl LengthCheck

pub fn new(expected: u64) -> Self

Create a length check against the advertised body length in bytes.

Trait Implementations

impl Clone for LengthCheck

fn clone(&self) -> LengthCheck

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for LengthCheck

impl Debug for LengthCheck

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl IntegrityCheck for LengthCheck

fn update(&mut self, _chunk: &[u8])

Observe a chunk of body bytes. Called zero or more times, in order, before finalize.

fn finalize(self: Box<Self>, total: u64) -> Result<(), String>

Validate at EOF. total is the number of bytes observed across every update call. Return Err(reason) to fail the read; the reason is surfaced as an io::Error of kind InvalidData.