install go2rtc on bob

installs_on_host/go2rtc/pkg/ngrok/ngrok.go

@@ -0,0 +1,80 @@
+package ngrok
+
+import (
+	"bufio"
+	"encoding/json"
+	"io"
+	"os/exec"
+	"strings"
+
+	"github.com/AlexxIT/go2rtc/pkg/core"
+)
+
+type Ngrok struct {
+	core.Listener
+
+	Tunnels map[string]string
+
+	reader *bufio.Reader
+}
+
+type Message struct {
+	Msg  string `json:"msg"`
+	Addr string `json:"addr"`
+	URL  string `json:"url"`
+	Line string
+}
+
+func NewNgrok(command any) (*Ngrok, error) {
+	var arg []string
+	switch command.(type) {
+	case string:
+		arg = strings.Split(command.(string), " ")
+	case []string:
+		arg = command.([]string)
+	}
+
+	arg = append(arg, "--log", "stdout", "--log-format", "json")
+
+	cmd := exec.Command(arg[0], arg[1:]...)
+
+	r, err := cmd.StdoutPipe()
+	if err != nil {
+		return nil, err
+	}
+	cmd.Stderr = cmd.Stdout
+
+	n := &Ngrok{
+		Tunnels: map[string]string{},
+		reader:  bufio.NewReader(r),
+	}
+
+	if err = cmd.Start(); err != nil {
+		return nil, err
+	}
+
+	return n, nil
+}
+
+func (n *Ngrok) Serve() error {
+	for {
+		line, _, err := n.reader.ReadLine()
+		if err != nil {
+			if err != io.EOF {
+				return err
+			}
+			return nil
+		}
+
+		msg := new(Message)
+		_ = json.Unmarshal(line, msg)
+
+		if msg.Msg == "started tunnel" {
+			n.Tunnels[msg.Addr] = msg.URL
+		}
+
+		msg.Line = string(line)
+
+		n.Fire(msg)
+	}
+}