Fix Kasa KC200 cameras

pkg/kasa/producer.go

@@ -37,12 +37,25 @@ func Dial(url string) (*Producer, error) {
 		return nil, err
 	}
 
-	rd := struct {
-		io.Reader
-		io.Closer
-	}{
-		httputil.NewChunkedReader(res.Body),
-		res.Body,
+	// KC200
+	//   HTTP/1.0 200 OK
+	//   Server: Streamd,
+	//   Content-Type: multipart/x-mixed-replace;boundary=data-boundary--
+	rd := res.Body
+
+	// KD110, KC401, KC420WS:
+	//   HTTP/1.0 200 OK
+	//   Content-Type: multipart/x-mixed-replace;boundary=data-boundary--
+	//   Transfer-Encoding: chunked
+	if res.Header.Get("Transfer-Encoding") == "chunked" {
+		// HTTP/1.0 + chunked = out of standard, so need to use this construction:
+		rd = struct {
+			io.Reader
+			io.Closer
+		}{
+			httputil.NewChunkedReader(res.Body),
+			res.Body,
+		}
 	}
 
 	prod := &Producer{rd: core.NewReadBuffer(rd)}