cloudflared-mirror/tunnelrpc/logtransport.go

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// Package logtransport provides a transport that logs all of its messages.
package tunnelrpc
import (
"bytes"
"context"
"github.com/cloudflare/cloudflared/logger"
"zombiezen.com/go/capnproto2/encoding/text"
"zombiezen.com/go/capnproto2/rpc"
rpccapnp "zombiezen.com/go/capnproto2/std/capnp/rpc"
)
type transport struct {
rpc.Transport
l logger.Service
}
// NewTransportLogger creates a new logger that proxies messages to and from t and
// logs them to l. If l is nil, then the log package's default
// logger is used.
func NewTransportLogger(l logger.Service, t rpc.Transport) rpc.Transport {
return &transport{Transport: t, l: l}
}
func (t *transport) SendMessage(ctx context.Context, msg rpccapnp.Message) error {
t.l.Debugf("rpcconnect: tx %s", formatMsg(msg))
return t.Transport.SendMessage(ctx, msg)
}
func (t *transport) RecvMessage(ctx context.Context) (rpccapnp.Message, error) {
msg, err := t.Transport.RecvMessage(ctx)
if err != nil {
t.l.Debugf("rpcconnect: rx error: %s", err)
return msg, err
}
t.l.Debugf("rpcconnect: rx %s", formatMsg(msg))
return msg, nil
}
func formatMsg(m rpccapnp.Message) string {
var buf bytes.Buffer
text.NewEncoder(&buf).Encode(0x91b79f1f808db032, m.Struct)
return buf.String()
}