Struct Reader

pub struct Reader<'a> { /* private fields */ }

Available on crate feature std only.

A structure that implements std::io::Read for reading plaintext.

Implementations

impl<'a> Reader<'a>

pub fn into_first_chunk(self) -> Result<&'a [u8]>

Obtain a chunk of plaintext data received from the peer over this TLS connection.

This method consumes self so that it can return a slice whose lifetime is bounded by the ConnectionCommon that created this Reader.

Trait Implementations

impl BufRead for Reader<'_>

fn fill_buf(&mut self) -> Result<&[u8]>

Obtain a chunk of plaintext data received from the peer over this TLS connection. This reads the same data as Reader::read(), but returns a reference instead of copying the data.

The caller should call Reader::consume() afterward to advance the buffer.

See Reader::into_first_chunk() for a version of this function that returns a buffer with a longer lifetime.

fn consume(&mut self, amt: usize)

Tells this buffer that amt bytes have been consumed from the buffer, so they should no longer be returned in calls to read.

fn has_data_left(&mut self) -> Result<bool, Error>

🔬This is a nightly-only experimental API. (buf_read_has_data_left)

Checks if the underlying Read has any data left to be read.

fn read_until(&mut self, byte: u8, buf: &mut Vec<u8>) -> Result<usize, Error>

Reads all bytes into buf until the delimiter byte or EOF is reached.

fn skip_until(&mut self, byte: u8) -> Result<usize, Error>

Skips all bytes until the delimiter byte or EOF is reached.

fn read_line(&mut self, buf: &mut String) -> Result<usize, Error>

Reads all bytes until a newline (the 0xA byte) is reached, and append them to the provided String buffer.

fn split(self, byte: u8) -> Split<Self>

where Self: Sized,

Returns an iterator over the contents of this reader split on the byte byte.

fn lines(self) -> Lines<Self>

where Self: Sized,

Returns an iterator over the lines of this reader.

impl Read for Reader<'_>

fn read(&mut self, buf: &mut [u8]) -> Result<usize>

Obtain plaintext data received from the peer over this TLS connection.

If the peer closes the TLS session cleanly, this returns Ok(0) once all the pending data has been read. No further data can be received on that connection, so the underlying TCP connection should be half-closed too.

If the peer closes the TLS session uncleanly (a TCP EOF without sending a close_notify alert) this function returns a std::io::Error of type ErrorKind::UnexpectedEof once any pending data has been read.

Note that support for close_notify varies in peer TLS libraries: many do not support it and uncleanly close the TCP connection (this might be vulnerable to truncation attacks depending on the application protocol). This means applications using rustls must both handle EOF from this function, and unexpected EOF of the underlying TCP connection.

If there are no bytes to read, this returns Err(ErrorKind::WouldBlock.into()).

You may learn the number of bytes available at any time by inspecting the return of Connection::process_new_packets.

fn read_buf(&mut self, cursor: BorrowedCursor<'_>) -> Result<()>

🔬This is a nightly-only experimental API. (read_buf)

Obtain plaintext data received from the peer over this TLS connection.

If the peer closes the TLS session, this returns Ok(()) without filling any more of the buffer once all the pending data has been read. No further data can be received on that connection, so the underlying TCP connection should be half-closed too.

If the peer closes the TLS session uncleanly (a TCP EOF without sending a close_notify alert) this function returns a std::io::Error of type ErrorKind::UnexpectedEof once any pending data has been read.

Note that support for close_notify varies in peer TLS libraries: many do not support it and uncleanly close the TCP connection (this might be vulnerable to truncation attacks depending on the application protocol). This means applications using rustls must both handle EOF from this function, and unexpected EOF of the underlying TCP connection.

If there are no bytes to read, this returns Err(ErrorKind::WouldBlock.into()).

You may learn the number of bytes available at any time by inspecting the return of Connection::process_new_packets.

fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize, Error>

Like read, except that it reads into a slice of buffers.

fn is_read_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)

Determines if this Reader has an efficient read_vectored implementation.

fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize, Error>

Reads all bytes until EOF in this source, placing them into buf.

fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>

Reads all bytes until EOF in this source, appending them to buf.

fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>

Reads the exact number of bytes required to fill buf.

fn read_buf_exact(&mut self, cursor: BorrowedCursor<'_>) -> Result<(), Error>

🔬This is a nightly-only experimental API. (read_buf)

Reads the exact number of bytes required to fill cursor.

fn by_ref(&mut self) -> &mut Self

where Self: Sized,

Creates a “by reference” adaptor for this instance of Read.

fn bytes(self) -> Bytes<Self>

where Self: Sized,

Transforms this Read instance to an Iterator over its bytes.

fn chain<R>(self, next: R) -> Chain<Self, R>

where R: Read, Self: Sized,

Creates an adapter which will chain this stream with another.

fn take(self, limit: u64) -> Take<Self>

where Self: Sized,

Creates an adapter which will read at most limit bytes from it.