mirror of
https://github.com/v2fly/v2ray-core.git
synced 2024-06-07 00:20:42 +00:00
104 lines
2.3 KiB
Go
104 lines
2.3 KiB
Go
package buf
|
|
|
|
import (
|
|
"io"
|
|
"time"
|
|
|
|
"v2ray.com/core/common/errors"
|
|
"v2ray.com/core/common/signal"
|
|
)
|
|
|
|
// Reader extends io.Reader with alloc.Buffer.
|
|
type Reader interface {
|
|
// Read reads content from underlying reader, and put it into an alloc.Buffer.
|
|
Read() (*Buffer, error)
|
|
}
|
|
|
|
var ErrReadTimeout = newError("Buf: IO timeout.")
|
|
|
|
type TimeoutReader interface {
|
|
ReadTimeout(time.Duration) (*Buffer, error)
|
|
}
|
|
|
|
// Writer extends io.Writer with alloc.Buffer.
|
|
type Writer interface {
|
|
// Write writes an alloc.Buffer into underlying writer.
|
|
Write(*Buffer) error
|
|
}
|
|
|
|
// ReadFrom creates a Supplier to read from a given io.Reader.
|
|
func ReadFrom(reader io.Reader) Supplier {
|
|
return func(b []byte) (int, error) {
|
|
return reader.Read(b)
|
|
}
|
|
}
|
|
|
|
// ReadFullFrom creates a Supplier to read full buffer from a given io.Reader.
|
|
func ReadFullFrom(reader io.Reader, size int) Supplier {
|
|
return func(b []byte) (int, error) {
|
|
return io.ReadFull(reader, b[:size])
|
|
}
|
|
}
|
|
|
|
// Pipe dumps all payload from reader to writer, until an error occurs.
|
|
// ActivityTimer gets updated as soon as there is a payload.
|
|
func Pipe(timer signal.ActivityTimer, reader Reader, writer Writer) error {
|
|
for {
|
|
buffer, err := reader.Read()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
timer.Update()
|
|
|
|
if buffer.IsEmpty() {
|
|
buffer.Release()
|
|
continue
|
|
}
|
|
|
|
err = writer.Write(buffer)
|
|
if err != nil {
|
|
buffer.Release()
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
|
|
// PipeUntilEOF behaves the same as Pipe(). The only difference is PipeUntilEOF returns nil on EOF.
|
|
func PipeUntilEOF(timer signal.ActivityTimer, reader Reader, writer Writer) error {
|
|
err := Pipe(timer, reader, writer)
|
|
if err != nil && errors.Cause(err) != io.EOF {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// NewReader creates a new Reader.
|
|
// The Reader instance doesn't take the ownership of reader.
|
|
func NewReader(reader io.Reader) Reader {
|
|
return &BytesToBufferReader{
|
|
reader: reader,
|
|
}
|
|
}
|
|
|
|
// ToBytesReader converts a Reaaer to io.Reader.
|
|
func ToBytesReader(stream Reader) io.Reader {
|
|
return &bufferToBytesReader{
|
|
stream: stream,
|
|
}
|
|
}
|
|
|
|
// NewWriter creates a new Writer.
|
|
func NewWriter(writer io.Writer) Writer {
|
|
return &BufferToBytesWriter{
|
|
writer: writer,
|
|
}
|
|
}
|
|
|
|
// ToBytesWriter converts a Writer to io.Writer
|
|
func ToBytesWriter(writer Writer) io.Writer {
|
|
return &bytesToBufferWriter{
|
|
writer: writer,
|
|
}
|
|
}
|