init

cmd/root.go

@@ -0,0 +1,23 @@
+package cmd
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/spf13/cobra"
+)
+
+var rootCmd = &cobra.Command{
+	Use:   "holesail-proxy",
+	Short: "A simple proxy for holesail connectors",
+	Run: func(cmd *cobra.Command, args []string) {
+		cmd.Help()
+	},
+}
+
+func Execute() {
+	if err := rootCmd.Execute(); err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+}

cmd/up.go

@@ -0,0 +1,101 @@
+package cmd
+
+import (
+	"fmt"
+	"net"
+	"net/http"
+	"net/http/httputil"
+	"net/url"
+	"os"
+	"os/exec"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/spf13/cobra"
+)
+
+func init() {
+	rootCmd.AddCommand(upCmd)
+}
+
+var upCmd = &cobra.Command{
+	Use:   "up",
+	Short: "Start holesail proxy",
+	Args:  cobra.NoArgs,
+	Run: func(cmd *cobra.Command, args []string) {
+		cmd.Println("Starting proxy")
+
+		http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+			if len(strings.Split(r.Host, ".")) == 1 {
+				w.Write([]byte("No holesail connector provided"))
+				return
+			}
+
+			connector := strings.Split(r.Host, ".")[0]
+
+			findProcess := exec.Command("pgrep", "-f", "/holesail/index.js "+connector)
+
+			out, _ := findProcess.Output()
+			splitted := strings.Split(string(out), "\n")
+
+			var isRunning bool
+			var freePort int
+
+			for _, pid := range splitted {
+				getDirectory := exec.Command("readlink", fmt.Sprintf("/proc/%s/cwd", string(pid)))
+				out, _ = getDirectory.Output()
+
+				wd, _ := os.Getwd()
+
+				if strings.TrimSpace(string(out)) == wd {
+					isRunning = true
+
+					getCommand := exec.Command("cat", fmt.Sprintf("/proc/%s/cmdline", string(pid)))
+					out, _ = getCommand.Output()
+
+					outSplitted := strings.Split(string(out), "/")
+
+					outWithoutBloat := outSplitted[len(outSplitted)-1]
+					outWithoutBloat = strings.Split(outWithoutBloat, "--port")[1]
+
+					fmt.Print(outWithoutBloat)
+					freePort, _ = strconv.Atoi(outWithoutBloat)
+				}
+			}
+
+			if !isRunning {
+				freePort, _ = getFreePort()
+
+				cmd := exec.Command("holesail", connector, "--port", strconv.Itoa(freePort))
+				cmd.Start()
+
+				// Wait for the connection to be made
+				for {
+					_, err := http.Get("http://localhost:" + strconv.Itoa(freePort))
+					if err == nil {
+						break
+					}
+					time.Sleep(500 * time.Millisecond)
+				}
+			}
+
+			appUrl, _ := url.Parse("http://localhost:" + strconv.Itoa(freePort))
+			httputil.NewSingleHostReverseProxy(appUrl).ServeHTTP(w, r)
+		})
+
+		http.ListenAndServe(":80", nil)
+	},
+}
+
+func getFreePort() (port int, err error) {
+	var a *net.TCPAddr
+	if a, err = net.ResolveTCPAddr("tcp", "localhost:0"); err == nil {
+		var l *net.TCPListener
+		if l, err = net.ListenTCP("tcp", a); err == nil {
+			defer l.Close()
+			return l.Addr().(*net.TCPAddr).Port, nil
+		}
+	}
+	return
+}

go.mod

@@ -0,0 +1,10 @@
+module holesail-proxy
+
+go 1.23.5
+
+require github.com/spf13/cobra v1.8.1
+
+require (
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
+)

go.sum

@@ -0,0 +1,10 @@
+github.com/cpuguy83/go-md2man/v2 v2.0.4/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
+github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
+github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
+github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/spf13/cobra v1.8.1 h1:e5/vxKd/rZsfSJMUX1agtjeTDf+qv1/JdBF8gg5k9ZM=
+github.com/spf13/cobra v1.8.1/go.mod h1:wHxEcudfqmLYa8iTfL+OuZPbBZkmvliBWKIezN3kD9Y=
+github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
+github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

main.go

@@ -0,0 +1,7 @@
+package main
+
+import "holesail-proxy/cmd"
+
+func main() {
+	cmd.Execute()
+}