fix: parse ONVIF media service address (#48)

Sense/server/app/sense/adapters/onvif/parser.go

@@ -54,3 +54,33 @@ func ParseStreamURI(data []byte) (string, error) {
 		}
 	}
 }
+
+func ParseMediaServiceAddress(data []byte) (string, error) {
+	decoder := xml.NewDecoder(strings.NewReader(string(data)))
+	mediaDepth := 0
+	for {
+		token, err := decoder.Token()
+		if err != nil {
+			return "", fmt.Errorf("media_service_not_found")
+		}
+		switch value := token.(type) {
+		case xml.StartElement:
+			if value.Name.Local == "Media" {
+				mediaDepth++
+				continue
+			}
+			if mediaDepth > 0 && value.Name.Local == "XAddr" {
+				var address string
+				if err := decoder.DecodeElement(&address, &value); err != nil {
+					return "", err
+				}
+				return strings.TrimSpace(address), nil
+			}
+		case xml.EndElement:
+			if value.Name.Local == "Media" && mediaDepth > 0 {
+				mediaDepth--
+			}
+		}
+	}
+}
+