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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package thrift
import (
"bufio"
"bytes"
"context"
"encoding/binary"
"fmt"
"io"
)
// Deprecated: Use DEFAULT_MAX_FRAME_SIZE instead.
const DEFAULT_MAX_LENGTH = 16384000
type TFramedTransport struct {
transport TTransport
cfg *TConfiguration
writeBuf *bytes.Buffer
reader *bufio.Reader
readBuf *bytes.Buffer
buffer [4]byte
}
type tFramedTransportFactory struct {
factory TTransportFactory
cfg *TConfiguration
}
// Deprecated: Use NewTFramedTransportFactoryConf instead.
func NewTFramedTransportFactory(factory TTransportFactory) TTransportFactory {
return NewTFramedTransportFactoryConf(factory, &TConfiguration{
MaxFrameSize: DEFAULT_MAX_LENGTH,
noPropagation: true,
})
}
// Deprecated: Use NewTFramedTransportFactoryConf instead.
func NewTFramedTransportFactoryMaxLength(factory TTransportFactory, maxLength uint32) TTransportFactory {
return NewTFramedTransportFactoryConf(factory, &TConfiguration{
MaxFrameSize: int32(maxLength),
noPropagation: true,
})
}
func NewTFramedTransportFactoryConf(factory TTransportFactory, conf *TConfiguration) TTransportFactory {
PropagateTConfiguration(factory, conf)
return &tFramedTransportFactory{
factory: factory,
cfg: conf,
}
}
func (p *tFramedTransportFactory) GetTransport(base TTransport) (TTransport, error) {
PropagateTConfiguration(base, p.cfg)
tt, err := p.factory.GetTransport(base)
if err != nil {
return nil, err
}
return NewTFramedTransportConf(tt, p.cfg), nil
}
func (p *tFramedTransportFactory) SetTConfiguration(cfg *TConfiguration) {
PropagateTConfiguration(p.factory, cfg)
p.cfg = cfg
}
// Deprecated: Use NewTFramedTransportConf instead.
func NewTFramedTransport(transport TTransport) *TFramedTransport {
return NewTFramedTransportConf(transport, &TConfiguration{
MaxFrameSize: DEFAULT_MAX_LENGTH,
noPropagation: true,
})
}
// Deprecated: Use NewTFramedTransportConf instead.
func NewTFramedTransportMaxLength(transport TTransport, maxLength uint32) *TFramedTransport {
return NewTFramedTransportConf(transport, &TConfiguration{
MaxFrameSize: int32(maxLength),
noPropagation: true,
})
}
func NewTFramedTransportConf(transport TTransport, conf *TConfiguration) *TFramedTransport {
PropagateTConfiguration(transport, conf)
return &TFramedTransport{
transport: transport,
reader: bufio.NewReader(transport),
cfg: conf,
}
}
func (p *TFramedTransport) Open() error {
return p.transport.Open()
}
func (p *TFramedTransport) IsOpen() bool {
return p.transport.IsOpen()
}
func (p *TFramedTransport) Close() error {
return p.transport.Close()
}
func (p *TFramedTransport) Read(buf []byte) (read int, err error) {
defer func() {
// Make sure we return the read buffer back to pool
// after we finished reading from it.
if p.readBuf != nil && p.readBuf.Len() == 0 {
bufPool.put(&p.readBuf)
}
}()
if p.readBuf != nil {
read, err = p.readBuf.Read(buf)
if err != io.EOF {
return
}
// For bytes.Buffer.Read, EOF would only happen when read is zero,
// but still, do a sanity check,
// in case that behavior is changed in a future version of go stdlib.
// When that happens, just return nil error,
// and let the caller call Read again to read the next frame.
if read > 0 {
return read, nil
}
}
// Reaching here means that the last Read finished the last frame,
// so we need to read the next frame into readBuf now.
if err = p.readFrame(); err != nil {
return read, err
}
newRead, err := p.Read(buf[read:])
return read + newRead, err
}
func (p *TFramedTransport) ReadByte() (c byte, err error) {
buf := p.buffer[:1]
_, err = p.Read(buf)
if err != nil {
return
}
c = buf[0]
return
}
func (p *TFramedTransport) ensureWriteBufferBeforeWrite() {
if p.writeBuf == nil {
p.writeBuf = bufPool.get()
}
}
func (p *TFramedTransport) Write(buf []byte) (int, error) {
p.ensureWriteBufferBeforeWrite()
n, err := p.writeBuf.Write(buf)
return n, NewTTransportExceptionFromError(err)
}
func (p *TFramedTransport) WriteByte(c byte) error {
p.ensureWriteBufferBeforeWrite()
return p.writeBuf.WriteByte(c)
}
func (p *TFramedTransport) WriteString(s string) (n int, err error) {
p.ensureWriteBufferBeforeWrite()
return p.writeBuf.WriteString(s)
}
func (p *TFramedTransport) Flush(ctx context.Context) error {
defer bufPool.put(&p.writeBuf)
size := p.writeBuf.Len()
buf := p.buffer[:4]
binary.BigEndian.PutUint32(buf, uint32(size))
_, err := p.transport.Write(buf)
if err != nil {
return NewTTransportExceptionFromError(err)
}
if size > 0 {
if _, err := io.Copy(p.transport, p.writeBuf); err != nil {
return NewTTransportExceptionFromError(err)
}
}
err = p.transport.Flush(ctx)
return NewTTransportExceptionFromError(err)
}
func (p *TFramedTransport) readFrame() error {
if p.readBuf != nil {
bufPool.put(&p.readBuf)
}
p.readBuf = bufPool.get()
buf := p.buffer[:4]
if _, err := io.ReadFull(p.reader, buf); err != nil {
return err
}
size := binary.BigEndian.Uint32(buf)
if size > uint32(p.cfg.GetMaxFrameSize()) {
return NewTTransportException(UNKNOWN_TRANSPORT_EXCEPTION, fmt.Sprintf("Incorrect frame size (%d)", size))
}
_, err := io.CopyN(p.readBuf, p.reader, int64(size))
return NewTTransportExceptionFromError(err)
}
func (p *TFramedTransport) RemainingBytes() (num_bytes uint64) {
if p.readBuf == nil {
return 0
}
return uint64(p.readBuf.Len())
}
// SetTConfiguration implements TConfigurationSetter.
func (p *TFramedTransport) SetTConfiguration(cfg *TConfiguration) {
PropagateTConfiguration(p.transport, cfg)
p.cfg = cfg
}
var (
_ TConfigurationSetter = (*tFramedTransportFactory)(nil)
_ TConfigurationSetter = (*TFramedTransport)(nil)
)
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