install go2rtc on bob

installs_on_host/go2rtc/internal/hass/api.go

@@ -0,0 +1,104 @@
+package hass
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"net"
+	"net/http"
+	"strings"
+
+	"github.com/AlexxIT/go2rtc/internal/api"
+	"github.com/AlexxIT/go2rtc/internal/streams"
+	"github.com/AlexxIT/go2rtc/internal/webrtc"
+)
+
+func apiOK(w http.ResponseWriter, r *http.Request) {
+	api.Response(w, `{"status":1,"payload":{}}`, api.MimeJSON)
+}
+
+func apiStream(w http.ResponseWriter, r *http.Request) {
+	switch {
+	// /stream/{id}/add
+	case strings.HasSuffix(r.RequestURI, "/add"):
+		var v addJSON
+		if err := json.NewDecoder(r.Body).Decode(&v); err != nil {
+			http.Error(w, err.Error(), http.StatusBadRequest)
+			return
+		}
+
+		// we can get three types of links:
+		// 1. link to go2rtc stream: rtsp://...:8554/{stream_name}
+		// 2. static link to Hass camera
+		// 3. dynamic link to Hass camera
+		if _, err := streams.Patch(v.Name, v.Channels.First.Url); err == nil {
+			apiOK(w, r)
+		} else {
+			http.Error(w, err.Error(), http.StatusBadRequest)
+		}
+
+	// /stream/{id}/channel/0/webrtc
+	default:
+		i := strings.IndexByte(r.RequestURI[8:], '/')
+		if i <= 0 {
+			http.Error(w, "", http.StatusBadRequest)
+			return
+		}
+
+		name := r.RequestURI[8 : 8+i]
+		stream := streams.Get(name)
+		if stream == nil {
+			http.Error(w, api.StreamNotFound, http.StatusNotFound)
+			return
+		}
+
+		if err := r.ParseForm(); err != nil {
+			http.Error(w, err.Error(), http.StatusBadRequest)
+			return
+		}
+
+		s := r.FormValue("data")
+		offer, err := base64.StdEncoding.DecodeString(s)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusBadRequest)
+			return
+		}
+
+		s, err = webrtc.ExchangeSDP(stream, string(offer), "hass/webrtc", r.UserAgent())
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+
+		s = base64.StdEncoding.EncodeToString([]byte(s))
+		_, _ = w.Write([]byte(s))
+	}
+}
+
+func HassioAddr() string {
+	ints, _ := net.Interfaces()
+
+	for _, i := range ints {
+		if i.Name != "hassio" {
+			continue
+		}
+
+		addrs, _ := i.Addrs()
+		for _, addr := range addrs {
+			if addr, ok := addr.(*net.IPNet); ok {
+				return addr.IP.String()
+			}
+		}
+	}
+
+	return ""
+}
+
+type addJSON struct {
+	Name     string `json:"name"`
+	Channels struct {
+		First struct {
+			//Name string `json:"name"`
+			Url string `json:"url"`
+		} `json:"0"`
+	} `json:"channels"`
+}