From bd5339bff8bf5f5e877e94dfef265a22570a69c7 Mon Sep 17 00:00:00 2001
From: Mikhail Osipov <mike.osipov@gmail.com>
Date: Mon, 17 Feb 2020 11:56:43 +0300
Subject: first working version

---
 pkg/server/queue/queue.go | 60 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 pkg/server/queue/queue.go

(limited to 'pkg/server/queue/queue.go')

diff --git a/pkg/server/queue/queue.go b/pkg/server/queue/queue.go
new file mode 100644
index 0000000..8d0f395
--- /dev/null
+++ b/pkg/server/queue/queue.go
@@ -0,0 +1,60 @@
+package queue
+
+import (
+	"io"
+)
+
+type Q chan []byte
+
+type reader struct {
+	b []byte
+	q Q
+}
+
+type writer struct {
+	q Q
+}
+
+func New() Q {
+	return make(Q)
+}
+
+func (q Q) Reader() io.Reader {
+	return &reader{q: q}
+}
+
+func (r *reader) Read(p []byte) (int, error) {
+	if len(r.b) == 0 {
+		r.b = <-r.q
+		if r.b == nil {
+			return 0, io.EOF
+		}
+	}
+
+	n := copy(p, r.b)
+	r.b = r.b[n:]
+
+	return n, nil
+}
+
+func (q Q) Writer() io.Writer {
+	return &writer{q: q}
+}
+
+func (w *writer) Write(p []byte) (int, error) {
+	buf := make([]byte, len(p))
+	copy(buf, p)
+	w.q <- buf
+
+	return len(p), nil
+}
+
+func IoCopy(r io.Reader, w io.Writer) error {
+	if _, err := io.Copy(w, r); err != nil {
+		if err != io.EOF {
+			return err
+		}
+	}
+
+	return nil
+}
-- 
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