mirror of https://github.com/v2fly/v2ray-core.git
66 lines
1.3 KiB
Go
66 lines
1.3 KiB
Go
package mux
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import (
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"io"
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"v2ray.com/core/common/buf"
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"v2ray.com/core/common/serial"
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)
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type Reader struct {
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reader io.Reader
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remainingLength int
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buffer *buf.Buffer
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}
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func NewReader(reader buf.Reader) *Reader {
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return &Reader{
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reader: buf.ToBytesReader(reader),
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buffer: buf.NewLocal(1024),
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}
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}
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func (r *Reader) ReadMetadata() (*FrameMetadata, error) {
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b := r.buffer
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b.Clear()
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if err := b.AppendSupplier(buf.ReadFullFrom(r.reader, 2)); err != nil {
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return nil, err
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}
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metaLen := serial.BytesToUint16(b.Bytes())
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if metaLen > 512 {
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return nil, newError("invalid metalen ", metaLen)
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}
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b.Clear()
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if err := b.AppendSupplier(buf.ReadFullFrom(r.reader, int(metaLen))); err != nil {
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return nil, err
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}
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return ReadFrameFrom(b.Bytes())
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}
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func (r *Reader) Read() (*buf.Buffer, bool, error) {
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b := buf.New()
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var dataLen int
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if r.remainingLength > 0 {
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dataLen = r.remainingLength
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r.remainingLength = 0
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} else {
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if err := b.AppendSupplier(buf.ReadFullFrom(r.reader, 2)); err != nil {
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return nil, false, err
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}
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dataLen = int(serial.BytesToUint16(b.Bytes()))
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b.Clear()
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}
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if dataLen > buf.Size {
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r.remainingLength = dataLen - buf.Size
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dataLen = buf.Size
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}
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if err := b.AppendSupplier(buf.ReadFullFrom(r.reader, dataLen)); err != nil {
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return nil, false, err
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}
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return b, (r.remainingLength > 0), nil
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}
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