rename hook tee to dump

1 files changed, 115 insertions, 0 deletions

diff --git a/pkg/server/hook/dump.go b/pkg/server/hook/dump.go
new file mode 100644
index 0000000..d6bcd90
--- /dev/null
+++ b/pkg/server/hook/dump.go
@@ -0,0 +1,115 @@
+package hook
+
+import (
+	"bytes"
+	"encoding/hex"
+	"fmt"
+	"os"
+	"path"
+	"time"
+	"tunnel/pkg/config"
+	"tunnel/pkg/server/env"
+	"tunnel/pkg/server/opts"
+	"tunnel/pkg/server/queue"
+)
+
+const dumpDefaultFile = "/tmp/tunnel/dump"
+
+type dump struct {
+	f *os.File
+	h *dumpHook
+}
+
+type dumpHook struct {
+	file string
+	time bool
+}
+
+func (t *dump) write(s string, p []byte) error {
+	var out bytes.Buffer
+
+	if t.h.time {
+		now := time.Now().Format(config.TimeMsFormat)
+		fmt.Fprintln(&out, now, s, len(p))
+	} else {
+		fmt.Fprintln(&out, s, len(p))
+	}
+
+	w := hex.Dumper(&out)
+	w.Write(p)
+	w.Close()
+
+	if _, err := t.f.Write(out.Bytes()); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (t *dump) Send(rq, wq queue.Q) error {
+	for b := range rq {
+		t.write(">", b)
+		wq <- b
+	}
+
+	return nil
+}
+
+func (t *dump) Recv(rq, wq queue.Q) error {
+	for b := range rq {
+		t.write("<", b)
+		wq <- b
+	}
+
+	return nil
+}
+
+func (t *dump) Close() {
+	t.f.Close()
+}
+
+func (h *dumpHook) where(env env.Env) string {
+	if h.file != "" {
+		return h.file
+	}
+
+	if v := env.GetLocal("dump.file"); v != "" {
+		return v
+	}
+
+	return dumpDefaultFile
+}
+
+func (h *dumpHook) Open(env env.Env) (interface{}, error) {
+	file := h.where(env)
+	dir := path.Dir(file)
+
+	if err := os.MkdirAll(dir, 0755); err != nil {
+		return nil, err
+	}
+
+	tid, sid := env.Get("tunnel"), env.Get("stream")
+	name := fmt.Sprintf("%s.%s.%s", file, tid, sid)
+
+	t := &dump{h: h}
+
+	if f, err := os.Create(name); err != nil {
+		return nil, err
+	} else {
+		t.f = f
+	}
+
+	return t, nil
+}
+
+func newDumpHook(opts opts.Opts) (hook, error) {
+	h := &dumpHook{
+		file: opts["file"],
+		time: opts.Bool("time"),
+	}
+	return h, nil
+}
+
+func init() {
+	register("dump", newDumpHook)
+}