add zip module

2 files changed, 63 insertions, 7 deletions

diff --git a/pkg/server/module/hex.go b/pkg/server/module/hex.go
index c3ad0db..e71688c 100644
--- a/pkg/server/module/hex.go
+++ b/pkg/server/module/hex.go
@@ -9,7 +9,7 @@ import (
 
 type hexModule struct{}
 
-func (h hexModule) Send(rq, wq queue.Q) error {
+func (m hexModule) Send(rq, wq queue.Q) error {
 	enc := hex.NewEncoder(wq.Writer())
 
 	for b := range rq {
@@ -19,18 +19,19 @@ func (h hexModule) Send(rq, wq queue.Q) error {
 	return nil
 }
 
-func (h hexModule) Recv(rq, wq queue.Q) error {
+func (m hexModule) Recv(rq, wq queue.Q) error {
 	r := hex.NewDecoder(rq.Reader())
-	w := wq.Writer()
-	return queue.IoCopy(r, w)
+	return queue.IoCopy(r, wq.Writer())
 }
 
 func (m hexModule) Open(env env.Env) (interface{}, error) {
 	return m, nil
 }
 
+func newHexModule(opts.Opts, env.Env) (module, error) {
+	return hexModule{}, nil
+}
+
 func init() {
-	register("hex", func(opts.Opts, env.Env) (module, error) {
-		return hexModule{}, nil
-	})
+	register("hex", newHexModule)
 }
diff --git a/pkg/server/module/zip.go b/pkg/server/module/zip.go
new file mode 100644
index 0000000..b0abb38
--- /dev/null
+++ b/pkg/server/module/zip.go
@@ -0,0 +1,55 @@
+package module
+
+import (
+	"compress/flate"
+	"io"
+	"tunnel/pkg/server/env"
+	"tunnel/pkg/server/opts"
+	"tunnel/pkg/server/queue"
+)
+
+type zipModule struct{}
+
+func (m zipModule) Send(rq, wq queue.Q) error {
+	w, err := flate.NewWriter(wq.Writer(), flate.BestCompression)
+	if err != nil {
+		return err
+	}
+
+	for b := range rq {
+		if _, err := w.Write(b); err != nil {
+			return err
+		}
+		if err := w.Flush(); err != nil {
+			return err
+		}
+	}
+
+	return w.Close()
+}
+
+func (m zipModule) Recv(rq, wq queue.Q) error {
+	r := flate.NewReader(rq.Reader())
+
+	// FIXME: not received ending due to ultimate conn.Close
+	if err := queue.IoCopy(r, wq.Writer()); err != nil {
+		if err == io.ErrUnexpectedEOF {
+			return nil
+		}
+		return err
+	}
+
+	return r.Close()
+}
+
+func (m zipModule) Open(env.Env) (interface{}, error) {
+	return m, nil
+}
+
+func newZipModule(opts.Opts, env.Env) (module, error) {
+	return zipModule{}, nil
+}
+
+func init() {
+	register("zip", newZipModule)
+}