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processor_sasl_auth_v0.go
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processor_sasl_auth_v0.go
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package proxy
import (
"encoding/binary"
"fmt"
"github.com/grepplabs/kafka-proxy/proxy/protocol"
"io"
"time"
)
type SaslAuthV0RequestHandler struct {
}
type SaslAuthV0ResponseHandler struct {
}
func (handler *SaslAuthV0RequestHandler) handleRequest(dst DeadlineWriter, src DeadlineReaderWriter, ctx *RequestsLoopContext) (readErr bool, err error) {
if readErr, err = copySaslAuthRequest(dst, src, ctx.timeout, ctx.buf); err != nil {
return readErr, err
}
if err = ctx.putNextHandlers(defaultRequestHandler, defaultResponseHandler); err != nil {
return false, err
}
return false, nil
}
func (handler *SaslAuthV0ResponseHandler) handleResponse(dst DeadlineWriter, src DeadlineReader, ctx *ResponsesLoopContext) (readErr bool, err error) {
if readErr, err = copySaslAuthResponse(dst, src, ctx.timeout); err != nil {
return readErr, err
}
return false, nil // nextResponse
}
func copySaslAuthRequest(dst DeadlineWriter, src DeadlineReader, timeout time.Duration, buf []byte) (readErr bool, err error) {
requestDeadline := time.Now().Add(timeout)
err = dst.SetWriteDeadline(requestDeadline)
if err != nil {
return false, err
}
err = src.SetReadDeadline(requestDeadline)
if err != nil {
return true, err
}
sizeBuf := make([]byte, 4) // Size => int32
if _, err = io.ReadFull(src, sizeBuf); err != nil {
return true, err
}
length := binary.BigEndian.Uint32(sizeBuf)
if int32(length) > protocol.MaxRequestSize {
return true, protocol.PacketDecodingError{Info: fmt.Sprintf("auth message of length %d too large", length)}
}
//logrus.Printf("SASL auth request length %v", length)
// write - send to broker
if _, err = dst.Write(sizeBuf); err != nil {
return false, err
}
if readErr, err = myCopyN(dst, src, int64(length), buf); err != nil {
return readErr, err
}
return false, nil
}
func copySaslAuthResponse(dst DeadlineWriter, src DeadlineReader, timeout time.Duration) (readErr bool, err error) {
//logrus.Printf("SASL auth response")
responseDeadline := time.Now().Add(timeout)
err = dst.SetWriteDeadline(responseDeadline)
if err != nil {
return false, err
}
err = src.SetReadDeadline(responseDeadline)
if err != nil {
return true, err
}
header := make([]byte, 4)
_, err = io.ReadFull(src, header)
if err != nil {
return true, err
}
if _, err = dst.Write(header); err != nil {
return false, err
}
return false, nil
}