40 lines
746 B
Go
40 lines
746 B
Go
package wire
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import (
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"fmt"
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"io"
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)
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// Sender sends messages to the server.
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type Sender interface {
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SendMessage(msg []byte) error
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NewSyncSender() SyncSender
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}
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type realSender struct {
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writer io.Writer
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}
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func NewSender(w io.Writer) Sender {
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return &realSender{w}
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}
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func SendMessageString(s Sender, msg string) error {
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return s.SendMessage([]byte(msg))
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}
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func (s *realSender) SendMessage(msg []byte) error {
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if len(msg) > MaxMessageLength {
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return fmt.Errorf("message length exceeds maximum: %d", len(msg))
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}
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lengthAndMsg := fmt.Sprintf("%04x%s", len(msg), msg)
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return writeFully(s.writer, []byte(lengthAndMsg))
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}
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func (s *realSender) NewSyncSender() SyncSender {
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return NewSyncSender(s.writer)
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}
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var _ Sender = &realSender{}
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