89 lines
2.3 KiB
Go
89 lines
2.3 KiB
Go
package quic
|
|
|
|
import (
|
|
"errors"
|
|
"net"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/quic-go/quic-go"
|
|
"github.com/rs/zerolog"
|
|
"github.com/rs/zerolog/log"
|
|
)
|
|
|
|
type SafeStreamCloser struct {
|
|
lock sync.Mutex
|
|
stream quic.Stream
|
|
writeTimeout time.Duration
|
|
log *zerolog.Logger
|
|
}
|
|
|
|
func NewSafeStreamCloser(stream quic.Stream, writeTimeout time.Duration, log *zerolog.Logger) *SafeStreamCloser {
|
|
return &SafeStreamCloser{
|
|
stream: stream,
|
|
writeTimeout: writeTimeout,
|
|
log: log,
|
|
}
|
|
}
|
|
|
|
func (s *SafeStreamCloser) Read(p []byte) (n int, err error) {
|
|
return s.stream.Read(p)
|
|
}
|
|
|
|
func (s *SafeStreamCloser) Write(p []byte) (n int, err error) {
|
|
s.lock.Lock()
|
|
defer s.lock.Unlock()
|
|
if s.writeTimeout > 0 {
|
|
err = s.stream.SetWriteDeadline(time.Now().Add(s.writeTimeout))
|
|
if err != nil {
|
|
log.Err(err).Msg("Error setting write deadline for QUIC stream")
|
|
}
|
|
}
|
|
nBytes, err := s.stream.Write(p)
|
|
if err != nil {
|
|
s.handleTimeout(err)
|
|
}
|
|
|
|
return nBytes, err
|
|
}
|
|
|
|
// Handles the timeout error in case it happened, by canceling the stream write.
|
|
func (s *SafeStreamCloser) handleTimeout(err error) {
|
|
var netErr net.Error
|
|
if errors.As(err, &netErr) {
|
|
if netErr.Timeout() {
|
|
s.log.Error().Err(netErr).Msg("Closing quic stream due to timeout while writing")
|
|
s.stream.CancelWrite(0)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (s *SafeStreamCloser) Close() error {
|
|
// Make sure a possible writer does not block the lock forever. We need it, so we can close the writer
|
|
// side of the stream safely.
|
|
_ = s.stream.SetWriteDeadline(time.Now())
|
|
|
|
// This lock is eventually acquired despite Write also acquiring it, because we set a deadline to writes.
|
|
s.lock.Lock()
|
|
defer s.lock.Unlock()
|
|
|
|
// We have to clean up the receiving stream ourselves since the Close in the bottom does not handle that.
|
|
s.stream.CancelRead(0)
|
|
return s.stream.Close()
|
|
}
|
|
|
|
func (s *SafeStreamCloser) CloseWrite() error {
|
|
s.lock.Lock()
|
|
defer s.lock.Unlock()
|
|
|
|
// As documented by the quic-go library, this doesn't actually close the entire stream.
|
|
// It prevents further writes, which in turn will result in an EOF signal being sent the other side of stream when
|
|
// reading.
|
|
// We can still read from this stream.
|
|
return s.stream.Close()
|
|
}
|
|
|
|
func (s *SafeStreamCloser) SetDeadline(deadline time.Time) error {
|
|
return s.stream.SetDeadline(deadline)
|
|
}
|