98 lines
2.9 KiB
Dart
98 lines
2.9 KiB
Dart
part of '../../main.dart';
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class CameraControlsWidget extends StatefulWidget {
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final String url;
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CameraControlsWidget({Key key, @required this.url}) : super(key: key);
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@override
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_CameraControlsWidgetState createState() => _CameraControlsWidgetState();
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}
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class _CameraControlsWidgetState extends State<CameraControlsWidget> {
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@override
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void initState() {
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super.initState();
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_getData();
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}
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http.Client client;
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http.StreamedResponse response;
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List<int> binaryImage = [];
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void _getData() async {
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client = new http.Client(); // create a client to make api calls
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http.Request request = new http.Request("GET", Uri.parse(widget.url)); // create get request
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Logger.d("[Sending] ==> ${widget.url}");
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response = await client.send(request); // sends request and waits for response stream
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Logger.d("[Received] <== ${response.headers}");
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List<int> primaryBuffer=[];
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int imageSizeStart = 0;
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int imageSizeEnd = 0;
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int imageStart = 0;
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response.stream.transform(
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StreamTransformer.fromHandlers(
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handleData: (data, sink) {
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primaryBuffer.addAll(data);
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if (primaryBuffer.length >= 40) {
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for (int i = 15; i < primaryBuffer.length - 16; i++) {
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String tmp1 = utf8.decode(
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primaryBuffer.sublist(i, i + 16), allowMalformed: true);
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if (tmp1 == "Content-Length: ") {
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imageSizeStart = i + 16;
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break;
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}
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}
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for (int i = imageSizeStart; i < primaryBuffer.length - 4; i++) {
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String tmp1 = utf8.decode(
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primaryBuffer.sublist(i, i + 4), allowMalformed: true);
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if (tmp1 == "\r\n\r\n") {
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imageSizeEnd = i;
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imageStart = i + 4;
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break;
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}
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}
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int imageSize = int.tryParse(utf8.decode(
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primaryBuffer.sublist(imageSizeStart, imageSizeEnd),
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allowMalformed: true));
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//Logger.d("== imageSize=$imageSize");
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if (primaryBuffer.length >= imageStart + imageSize) {
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sink.add(
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primaryBuffer.sublist(imageStart, imageStart + imageSize));
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primaryBuffer = primaryBuffer.sublist(imageStart + imageSize);
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}
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}
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},
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handleError: (error, stack, sink) {},
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handleDone: (sink) {
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sink.close();
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},
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)
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).listen((d) {
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setState(() {
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binaryImage = d;
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});
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});
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}
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@override
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Widget build(BuildContext context) {
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if (binaryImage.isEmpty) {
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return Text("Loading...");
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} else {
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return Column(
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children: <Widget>[
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Image.memory(Uint8List.fromList(binaryImage), gaplessPlayback: true),
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],
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);
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}
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}
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@override
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void dispose() {
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client.close();
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super.dispose();
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}
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} |