pub fn stream_send(
        &mut self, stream_id: u64, buf: &[u8], fin: bool,
    ) -> Result<usize> {
        // We can't write on the peer's unidirectional streams.
        if !stream::is_bidi(stream_id) &&
            !stream::is_local(stream_id, self.is_server)
        {
            return Err(Error::InvalidStreamState);
        }

        // Mark the connection as blocked if the connection-level flow control
        // limit doesn't let us buffer all the data.
        //
        // Note that this is separate from "send capacity" as that also takes
        // congestion control into consideration.
        if self.max_tx_data - self.tx_data < buf.len() as u64 {
            self.blocked_limit = Some(self.max_tx_data);
        }

        // Truncate the input buffer based on the connection's send capacity if
        // necessary.
        let cap = self.tx_cap;

        let (buf, fin) = if cap < buf.len() {
            (&buf[..cap], false)
        } else {
            (buf, fin)
        };

        // Get existing stream or create a new one.
        let stream = self.get_or_create_stream(stream_id, true)?;

        #[cfg(feature = "qlog")]
        let offset = stream.send.off_back();

        let was_flushable = stream.is_flushable();

        let sent = match stream.send.write(buf, fin) {
            Ok(v) => v,

            Err(e) => {
                self.streams.mark_writable(stream_id, false);
                return Err(e);
            },
        };

        let urgency = stream.urgency;
        let incremental = stream.incremental;

        let flushable = stream.is_flushable();

        let writable = stream.is_writable();

        let empty_fin = buf.is_empty() && fin;

        if sent < buf.len() {
            let max_off = stream.send.max_off();

            self.streams.mark_blocked(stream_id, true, max_off);
        } else {
            self.streams.mark_blocked(stream_id, false, 0);
        }

        // If the stream is now flushable push it to the flushable queue, but
        // only if it wasn't already queued.
        //
        // Consider the stream flushable also when we are sending a zero-length
        // frame that has the fin flag set.
        if (flushable || empty_fin) && !was_flushable {
            self.streams.push_flushable(stream_id, urgency, incremental);
        }

        if !writable {
            self.streams.mark_writable(stream_id, false);
        }

        self.tx_cap -= sent;

        self.tx_data += sent as u64;

        self.recovery.rate_check_app_limited();

        qlog_with!(self.qlog_streamer, q, {
            let ev = qlog::event::Event::h3_data_moved(
                stream_id.to_string(),
                Some(offset.to_string()),
                Some(sent as u64),
                None,
                Some(qlog::H3DataRecipient::Transport),
                None,
            );
            q.add_event(ev).ok();
        });

        Ok(sent)
    }
/// Writes data to a stream.
///
/// On success the number of bytes written is returned, or [`Done`] if no
/// data was written (e.g. because the stream has no capacity).
///
/// In addition, if the peer has signalled that it doesn't want to receive
/// any more data from this stream by sending the `STOP_SENDING` frame, the
/// [`StreamStopped`] error will be returned instead of any data.
///
/// Note that in order to avoid buffering an infinite amount of data in the
/// stream's send buffer, streams are only allowed to buffer outgoing data
/// up to the amount that the peer allows it to send (that is, up to the
/// stream's outgoing flow control capacity).
///
/// This means that the number of written bytes returned can be lower than
/// the length of the input buffer when the stream doesn't have enough
/// capacity for the operation to complete. The application should retry the
/// operation once the stream is reported as writable again.
///
/// Applications should call this method only after the handshake is
/// completed (whenever [`is_established()`] returns `true`) or during
/// early data if enabled (whenever [`is_in_early_data()`] returns `true`).
///
/// [`Done`]: enum.Error.html#variant.Done
/// [`StreamStopped`]: enum.Error.html#variant.StreamStopped
/// [`is_established()`]: struct.Connection.html#method.is_established
/// [`is_in_early_data()`]: struct.Connection.html#method.is_in_early_data
///
/// ## Examples:
///
/// ```no_run
/// # let mut buf = [0; 512];
/// # let socket = std::net::UdpSocket::bind("127.0.0.1:0").unwrap();
/// # let mut config = quiche::Config::new(quiche::PROTOCOL_VERSION)?;
/// # let scid = quiche::ConnectionId::from_ref(&[0xba; 16]);
/// # let from = "127.0.0.1:1234".parse().unwrap();
/// # let mut conn = quiche::accept(&scid, None, from, &mut config)?;
/// # let stream_id = 0;
/// conn.stream_send(stream_id, b"hello", true)?;
/// # Ok::<(), quiche::Error>(())
/// ```
Writes data to a stream.
On success the number of bytes written is returned, or [`Done`] if no
data was written .

In addition, if the peer has signalled that it doesn't want to receive
any more data from this stream by sending the `STOP_SENDING` frame, the
[`StreamStopped`] error will be returned instead of any data.

Note that in order to avoid buffering an infinite amount of data in the
stream's send buffer, streams are only allowed to buffer outgoing data
up to the amount that the peer allows it to send (that is, up to the
stream's outgoing flow control capacity).

This means that the number of written bytes returned can be lower than
the length of the input buffer when the stream doesn't have enough
capacity for the operation to complete. The application should retry the
operation once the stream is reported as writable again.




Writes data to a stream . On success the number of bytes written is returned or [ ` Done ` ] if no data was written . In addition if the peer has signalled that it doesn ' t want to receive any more data from this stream by sending the ` STOP_SENDING ` frame the [ ` StreamStopped ` ] error will be returned instead of any data . Note that in order to avoid buffering an infinite amount of data in the stream ' s send buffer streams are only allowed to buffer outgoing data up to the amount that the peer allows it to send ( that is up to the stream ' s outgoing flow control capacity ) . This means that the number of written bytes returned can be lower than the length of the input buffer when the stream doesn ' t have enough capacity for the operation to complete . The application should retry the operation once the stream is reported as writable again .
pub fn stream_send(
        &mut self, stream_id: u64, buf: &[u8], fin: bool,
    ) -> Result<usize> {
        // We can't write on the peer's unidirectional streams.
        if !stream::is_bidi(stream_id) &&
            !stream::is_local(stream_id, self.is_server)
        {
            return Err(Error::InvalidStreamState);
        }
        // Mark the connection as blocked if the connection-level flow control
        // limit doesn't let us buffer all the data.
        //
        // Note that this is separate from "send capacity" as that also takes
        // congestion control into consideration.
        if self.max_tx_data - self.tx_data < buf.len() as u64 {
            self.blocked_limit = Some(self.max_tx_data);
        }
        // Truncate the input buffer based on the connection's send capacity if
        // necessary.
        let cap = self.tx_cap;
        let (buf, fin) = if cap < buf.len() {
            (&buf[..cap], false)
        } else {
            (buf, fin)
        };
        // Get existing stream or create a new one.
        let stream = self.get_or_create_stream(stream_id, true)?;
        #[cfg(feature = "qlog")]
        let offset = stream.send.off_back();
        let was_flushable = stream.is_flushable();
        let sent = match stream.send.write(buf, fin) {
            Ok(v) => v,
            Err(e) => {
                self.streams.mark_writable(stream_id, false);
                return Err(e);
            },
        };
        let urgency = stream.urgency;
        let incremental = stream.incremental;
        let flushable = stream.is_flushable();
        let writable = stream.is_writable();
        let empty_fin = buf.is_empty() && fin;
        if sent < buf.len() {
            let max_off = stream.send.max_off();
            self.streams.mark_blocked(stream_id, true, max_off);
        } else {
            self.streams.mark_blocked(stream_id, false, 0);
        }
        // If the stream is now flushable push it to the flushable queue, but
        // only if it wasn't already queued.
        //
        // Consider the stream flushable also when we are sending a zero-length
        // frame that has the fin flag set.
        if (flushable || empty_fin) && !was_flushable {
            self.streams.push_flushable(stream_id, urgency, incremental);
        }
        if !writable {
            self.streams.mark_writable(stream_id, false);
        }
        self.tx_cap -= sent;
        self.tx_data += sent as u64;
        self.recovery.rate_check_app_limited();
        qlog_with!(self.qlog_streamer, q, {
            let ev = qlog::event::Event::h3_data_moved(
                stream_id.to_string(),
                Some(offset.to_string()),
                Some(sent as u64),
                None,
                Some(qlog::H3DataRecipient::Transport),
                None,
            );
            q.add_event(ev).ok();
        });
        Ok(sent)
    }
pub fn stream_send ( & mut self , stream_id : u64 , buf : & [ u8 ] , fin : bool , ) -> Result < usize > { // We can't write on the peer's unidirectional streams. if ! stream :: is_bidi ( stream_id ) && ! stream :: is_local ( stream_id , self . is_server ) { return Err ( Error :: InvalidStreamState ) ; } // Mark the connection as blocked if the connection-level flow control // limit doesn't let us buffer all the data. // // Note that this is separate from "send capacity" as that also takes // congestion control into consideration. if self . max_tx_data - self . tx_data < buf . len ( ) as u64 { self . blocked_limit = Some ( self . max_tx_data ) ; } // Truncate the input buffer based on the connection's send capacity if // necessary. let cap = self . tx_cap ; let ( buf , fin ) = if cap < buf . len ( ) { ( & buf [ .. cap ] , false ) } else { ( buf , fin ) } ; // Get existing stream or create a new one. let stream = self . get_or_create_stream ( stream_id , true ) ? ; # [ cfg ( feature " " ) ] let offset = stream . send . off_back ( ) ; let was_flushable = stream . is_flushable ( ) ; let sent = match stream . send . write ( buf , fin ) { Ok ( v ) => v , Err ( e ) => { self . streams . mark_writable ( stream_id , false ) ; return Err ( e ) ; } , } ; let urgency = stream . urgency ; let incremental = stream . incremental ; let flushable = stream . is_flushable ( ) ; let writable = stream . is_writable ( ) ; let empty_fin = buf . is_empty ( ) && fin ; if sent < buf . len ( ) { let max_off = stream . send . max_off ( ) ; self . streams . mark_blocked ( stream_id , true , max_off ) ; } else { self . streams . mark_blocked ( stream_id , false , 0 ) ; } // If the stream is now flushable push it to the flushable queue, but // only if it wasn't already queued. // // Consider the stream flushable also when we are sending a zero-length // frame that has the fin flag set. if ( flushable || empty_fin ) && ! was_flushable { self . streams . push_flushable ( stream_id , urgency , incremental ) ; } if ! writable { self . streams . mark_writable ( stream_id , false ) ; } self . tx_cap -= sent ; self . tx_data += sent as u64 ; self . recovery . rate_check_app_limited ( ) ; qlog_with ! ( self qlog_streamer q { let ev qlog event Event h3_data_moved ( stream_id to_string ( ) Some ( offset to_string ( ) ) Some ( sent as u64 ) None Some ( qlog H3DataRecipient Transport ) None ) q add_event ( ev ) ok ( ) } ) ; Ok ( sent ) }
Writes data to a stream.
Writes data to a stream .
&mut self
stream_id
u64
buf
&[u8]
fin
bool
&mut self
stream_id
u64
buf
&[u8]
fin
bool
examples:
None
let mut buf = [0; 512];
None
let socket = std::net::udpsocket::bind("127.0.0.1:0").unwrap();
None
let mut config = quiche::config::new(quiche::protocol_version)?;
None
let scid = quiche::connectionid::from_ref(&[0xba; 16]);
None
let from = "127.0.0.1:1234".parse().unwrap();
None
let mut conn = quiche::accept(&scid, none, from, &mut config)?;
None
let stream_id = 0;
conn.stream_send(stream_id, b"hello", true)?.
conn . stream_send ( stream_id b " hello " true ) ? .
ok::<(), quiche::error>(())
None