From 2967da1eaefda261375e71e72ad530a2552d6c4c Mon Sep 17 00:00:00 2001
From: Dreamacro <Dreamacro@vip.qq.com>
Date: Sun, 13 Jun 2021 22:59:46 +0800
Subject: [PATCH] Created use clash as a library (markdown)

---
 use-clash-as-a-library.md | 54 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 use-clash-as-a-library.md

diff --git a/use-clash-as-a-library.md b/use-clash-as-a-library.md
new file mode 100644
index 0000000..4158434
--- /dev/null
+++ b/use-clash-as-a-library.md
@@ -0,0 +1,54 @@
+# Use clash as a library
+
+
+If clash does not fit your own usage, you can use clash as a library.
+There is already basic support:
+
+```go
+package main
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"net"
+
+	"github.com/Dreamacro/clash/adapter/outbound"
+	"github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/listener/socks"
+)
+
+func main() {
+	in := make(chan constant.ConnContext, 100)
+	defer close(in)
+
+	l, err := socks.New("127.0.0.1:10000", in)
+	if err != nil {
+		panic(err)
+	}
+	defer l.Close()
+
+	println("listen at:", l.Address())
+
+	direct := outbound.NewDirect()
+
+	for c := range in {
+		conn := c
+		metadata := conn.Metadata()
+		fmt.Printf("request incoming from %s to %s\n", metadata.SourceAddress(), metadata.RemoteAddress())
+		go func () {
+			remote, err := direct.DialContext(context.Background(), metadata)
+			if err != nil {
+				fmt.Printf("dial error: %s\n", err.Error())
+				return
+			}
+			relay(remote, conn.Conn())
+		}()
+	}
+}
+
+func relay(l, r net.Conn) {
+	go io.Copy(l, r)
+	io.Copy(r, l)
+}
+```