From e9bf22ae73b50bf7e72664bd7e71daedacbac9b6 Mon Sep 17 00:00:00 2001
From: Mikhail Osipov <mike.osipov@gmail.com>
Date: Thu, 27 Feb 2020 19:38:31 +0300
Subject: add zip module

---
 pkg/server/module/zip.go | 55 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 pkg/server/module/zip.go

(limited to 'pkg/server/module/zip.go')

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)
+}
-- 
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