first commit

Author: zhaochengyu

Dockerfile

@@ -0,0 +1,7 @@
+FROM alpine:3.5
+
+RUN apk add --no-cache --virtual .build-deps ca-certificates curl unzip
+
+ADD configure.sh /configure.sh
+RUN chmod +x /configure.sh
+CMD /configure.sh

app.json

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+{
+    "name": "PortFwd",
+    "description": "Deploy PortFwd on Heroku.",
+    "keywords": ["PortFwd"],
+    "env": {
+        "TARGET": {
+            "description": "PortFwd target ipaddress:port",
+            "value": "baidu.com:443"
+        }
+    },
+    "website": "",
+    "repository": "",
+    "stack": "container"
+}

configure.sh

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+#!/bin/sh
+
+# Download and install V2Ray
+mkdir /tmp/portfwd
+curl -L -H "Cache-Control: no-cache" -o /tmp/portfwd/portfwd.zip https://github.com/FunnyWolf/portfwd-heroku/releases/download/v1.0/releases.zip
+unzip /tmp/portfwd/portfwd.zip -d /tmp/portfwd
+install -m 755 /tmp/portfwd/portfwd /usr/local/bin/portfwd
+
+# Remove temporary directory
+rm -rf /tmp/portfwd
+
+# Run portfwd
+/usr/local/bin/portfwd -target "$UUID"

heroku.yml

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+build:
+  docker:
+    web: Dockerfile

main.go

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+package main
+
+import (
+	"flag"
+	"fmt"
+	"io"
+	"net"
+)
+func main() {
+	target := flag.String("target", "baidu.com:443", "The relay server (the connect-back address)")
+	flag.Parse()
+	locallistener, err :=net.Listen("tcp", "0.0.0.0:443")
+	if err != nil {
+		fmt.Errorf("Could not bind to port : %v\n", err)
+		return
+	}
+	defer locallistener.Close()
+	fmt.Printf("PortFwd to : %s\n", *target)
+	for {
+		stream, err := locallistener.Accept()
+		if err != nil {
+			return
+		}
+		proxyConn, err := net.Dial("tcp", *target)
+		if err != nil {
+			fmt.Errorf("Error creating Proxy TCP connection ! Error : %s\n", err)
+			return
+		}
+		go handleRelay(stream, proxyConn)
+	}
+}
+func handleRelay(src net.Conn, dst net.Conn) {
+	stop := make(chan bool, 2)
+	go relay(src, dst, stop)
+	go relay(dst, src, stop)
+	select {
+	case <-stop:
+		return
+	}
+}
+
+func relay(src net.Conn, dst net.Conn, stop chan bool) {
+	io.Copy(dst, src)
+	dst.Close()
+	src.Close()
+	stop <- true
+	return
+}