flutter-grpc

_init

flutter create my_app_flutter
dart pub add servicestack --directory my_app_flutter
dart pub add fixnum --directory my_app_flutter
dart pub add protobuf --directory my_app_flutter
dart pub add grpc --directory my_app_flutter

my_app_flutter\lib\main.dart

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:grpc/grpc.dart';
import 'package:servicestack/web_client.dart' if (dart.library.io) 'package:servicestack/client.dart';
import 'dart:io';

import 'services.pbgrpc.dart';

var host = "localhost";
var channel = ClientChannel(host, port:5054,
options:const ChannelOptions(credentials: ChannelCredentials.insecure(
)));
var client = GrpcServicesClient(channel);

void main() {
  if (!kReleaseMode && !kIsWeb) {
    if (Platform.isAndroid) {
      host = "10.0.2.2";
      channel = ClientChannel(host, port:5054,
          options:const ChannelOptions(credentials: ChannelCredentials.insecure(
          )));
      client = GrpcServicesClient(channel);
    }
  }

  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      ),
      home: const HelloFlutter(title: 'Flutter Demo Home Page'),
    );
  }
}

class HelloFlutter extends StatefulWidget {
  const HelloFlutter({super.key, required this.title});

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  State<StatefulWidget> createState() => HelloFlutterState();
}

class HelloFlutterState extends State<HelloFlutter> {
  //State for this widget
  String result = "";
  var myController = TextEditingController();
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.
      _counter++;
    });
  }

  @override
  void initState() {
    super.initState();

    myController.addListener(callService);
  }

  void callService() async {
    var text = myController.text.isEmpty ? "World" : myController.text;
    var response = await client.getHello(Hello(name: text));
    setState(() {
      result = response.result;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          // Here we take the value from the MyHomePage object that was created by
          // the App.build method, and use it to set our appbar title.
          title: Text(widget.title),
        ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            const Text(
              'You have pushed the button this many times:',
            ),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headline4,
            ),
            Container(
              padding: const EdgeInsets.only(top: 20),
              margin: const EdgeInsets.only(left: 100.0, right: 100.0),
              child: Column(
                children: [
                  const Text(
                    'Hello API',
                    style:
                        TextStyle(fontWeight: FontWeight.bold, fontSize: 24.0),
                  ),
                  TextField(
                    decoration: const InputDecoration(
                      border: OutlineInputBorder(),
                      hintText: 'World',
                    ),
                    controller: myController,
                  )
                ],
              ),
            ),
            Padding(
              padding: const EdgeInsets.all(8.0),
              child: Text(
                'Result: $result',
                style: const TextStyle(fontSize: 18),
              ),
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}

my_app_flutter\lib\services.pb.dart

///
//  Generated code. Do not modify.
//  source: services.proto
//
// @dart = 2.12
// ignore_for_file: annotate_overrides,camel_case_types,constant_identifier_names,directives_ordering,library_prefixes,non_constant_identifier_names,prefer_final_fields,return_of_invalid_type,unnecessary_const,unnecessary_import,unnecessary_this,unused_import,unused_shown_name

import 'dart:core' as $core;

import 'package:fixnum/fixnum.dart' as $fixnum;
import 'package:protobuf/protobuf.dart' as $pb;

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}

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  static $pb.PbList<StreamFiles> createRepeated() => $pb.PbList<StreamFiles>();
  @$core.pragma('dart2js:noInline')
  static StreamFiles getDefault() => _defaultInstance ??= $pb.GeneratedMessage.$_defaultFor<StreamFiles>(create);
  static StreamFiles? _defaultInstance;

  @$pb.TagNumber(1)
  $core.List<$core.String> get paths => $_getList(0);
}

class StreamServerEvents extends $pb.GeneratedMessage {
  static final $pb.BuilderInfo _i = $pb.BuilderInfo(const $core.bool.fromEnvironment('protobuf.omit_message_names') ? '' : 'StreamServerEvents', createEmptyInstance: create)
    ..pPS(1, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'Channels', protoName: 'Channels')
    ..hasRequiredFields = false
  ;

  StreamServerEvents._() : super();
  factory StreamServerEvents({
    $core.Iterable<$core.String>? channels,
  }) {
    final _result = create();
    if (channels != null) {
      _result.channels.addAll(channels);
    }
    return _result;
  }
  factory StreamServerEvents.fromBuffer($core.List<$core.int> i, [$pb.ExtensionRegistry r = $pb.ExtensionRegistry.EMPTY]) => create()..mergeFromBuffer(i, r);
  factory StreamServerEvents.fromJson($core.String i, [$pb.ExtensionRegistry r = $pb.ExtensionRegistry.EMPTY]) => create()..mergeFromJson(i, r);
  @$core.Deprecated(
  'Using this can add significant overhead to your binary. '
  'Use [GeneratedMessageGenericExtensions.deepCopy] instead. '
  'Will be removed in next major version')
  StreamServerEvents clone() => StreamServerEvents()..mergeFromMessage(this);
  @$core.Deprecated(
  'Using this can add significant overhead to your binary. '
  'Use [GeneratedMessageGenericExtensions.rebuild] instead. '
  'Will be removed in next major version')
  StreamServerEvents copyWith(void Function(StreamServerEvents) updates) => super.copyWith((message) => updates(message as StreamServerEvents)) as StreamServerEvents; // ignore: deprecated_member_use
  $pb.BuilderInfo get info_ => _i;
  @$core.pragma('dart2js:noInline')
  static StreamServerEvents create() => StreamServerEvents._();
  StreamServerEvents createEmptyInstance() => create();
  static $pb.PbList<StreamServerEvents> createRepeated() => $pb.PbList<StreamServerEvents>();
  @$core.pragma('dart2js:noInline')
  static StreamServerEvents getDefault() => _defaultInstance ??= $pb.GeneratedMessage.$_defaultFor<StreamServerEvents>(create);
  static StreamServerEvents? _defaultInstance;

  @$pb.TagNumber(1)
  $core.List<$core.String> get channels => $_getList(0);
}

class StreamServerEventsResponse extends $pb.GeneratedMessage {
  static final $pb.BuilderInfo _i = $pb.BuilderInfo(const $core.bool.fromEnvironment('protobuf.omit_message_names') ? '' : 'StreamServerEventsResponse', createEmptyInstance: create)
    ..aInt64(1, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'EventId', protoName: 'EventId')
    ..aOS(2, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'Channel', protoName: 'Channel')
    ..aOS(4, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'Selector', protoName: 'Selector')
    ..aOS(5, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'Json', protoName: 'Json')
    ..aOS(6, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'Op', protoName: 'Op')
    ..aOS(7, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'Target', protoName: 'Target')
    ..aOS(8, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'CssSelector', protoName: 'CssSelector')
    ..m<$core.String, $core.String>(9, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'Meta', protoName: 'Meta', entryClassName: 'StreamServerEventsResponse.MetaEntry', keyFieldType: $pb.PbFieldType.OS, valueFieldType: $pb.PbFieldType.OS)
    ..aOS(10, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'UserId', protoName: 'UserId')
    ..aOS(11, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'DisplayName', protoName: 'DisplayName')
    ..aOS(12, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'ProfileUrl', protoName: 'ProfileUrl')
    ..aOB(13, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'IsAuthenticated', protoName: 'IsAuthenticated')
    ..pPS(14, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'Channels', protoName: 'Channels')
    ..aInt64(15, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'CreatedAt', protoName: 'CreatedAt')
    ..aOS(21, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'Id', protoName: 'Id')
    ..aOS(22, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'UnRegisterUrl', protoName: 'UnRegisterUrl')
    ..aOS(23, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'UpdateSubscriberUrl', protoName: 'UpdateSubscriberUrl')
    ..aOS(24, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'HeartbeatUrl', protoName: 'HeartbeatUrl')
    ..aInt64(25, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'HeartbeatIntervalMs', protoName: 'HeartbeatIntervalMs')
    ..aInt64(26, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'IdleTimeoutMs', protoName: 'IdleTimeoutMs')
    ..aOM<ResponseStatus>(30, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'ResponseStatus', protoName: 'ResponseStatus', subBuilder: ResponseStatus.create)
    ..hasRequiredFields = false
  ;

  StreamServerEventsResponse._() : super();
  factory StreamServerEventsResponse({
    $fixnum.Int64? eventId,
    $core.String? channel,
    $core.String? selector,
    $core.String? json,
    $core.String? op,
    $core.String? target,
    $core.String? cssSelector,
    $core.Map<$core.String, $core.String>? meta,
    $core.String? userId,
    $core.String? displayName,
    $core.String? profileUrl,
    $core.bool? isAuthenticated,
    $core.Iterable<$core.String>? channels,
    $fixnum.Int64? createdAt,
    $core.String? id,
    $core.String? unRegisterUrl,
    $core.String? updateSubscriberUrl,
    $core.String? heartbeatUrl,
    $fixnum.Int64? heartbeatIntervalMs,
    $fixnum.Int64? idleTimeoutMs,
    ResponseStatus? responseStatus,
  }) {
    final _result = create();
    if (eventId != null) {
      _result.eventId = eventId;
    }
    if (channel != null) {
      _result.channel = channel;
    }
    if (selector != null) {
      _result.selector = selector;
    }
    if (json != null) {
      _result.json = json;
    }
    if (op != null) {
      _result.op = op;
    }
    if (target != null) {
      _result.target = target;
    }
    if (cssSelector != null) {
      _result.cssSelector = cssSelector;
    }
    if (meta != null) {
      _result.meta.addAll(meta);
    }
    if (userId != null) {
      _result.userId = userId;
    }
    if (displayName != null) {
      _result.displayName = displayName;
    }
    if (profileUrl != null) {
      _result.profileUrl = profileUrl;
    }
    if (isAuthenticated != null) {
      _result.isAuthenticated = isAuthenticated;
    }
    if (channels != null) {
      _result.channels.addAll(channels);
    }
    if (createdAt != null) {
      _result.createdAt = createdAt;
    }
    if (id != null) {
      _result.id = id;
    }
    if (unRegisterUrl != null) {
      _result.unRegisterUrl = unRegisterUrl;
    }
    if (updateSubscriberUrl != null) {
      _result.updateSubscriberUrl = updateSubscriberUrl;
    }
    if (heartbeatUrl != null) {
      _result.heartbeatUrl = heartbeatUrl;
    }
    if (heartbeatIntervalMs != null) {
      _result.heartbeatIntervalMs = heartbeatIntervalMs;
    }
    if (idleTimeoutMs != null) {
      _result.idleTimeoutMs = idleTimeoutMs;
    }
    if (responseStatus != null) {
      _result.responseStatus = responseStatus;
    }
    return _result;
  }
  factory StreamServerEventsResponse.fromBuffer($core.List<$core.int> i, [$pb.ExtensionRegistry r = $pb.ExtensionRegistry.EMPTY]) => create()..mergeFromBuffer(i, r);
  factory StreamServerEventsResponse.fromJson($core.String i, [$pb.ExtensionRegistry r = $pb.ExtensionRegistry.EMPTY]) => create()..mergeFromJson(i, r);
  @$core.Deprecated(
  'Using this can add significant overhead to your binary. '
  'Use [GeneratedMessageGenericExtensions.deepCopy] instead. '
  'Will be removed in next major version')
  StreamServerEventsResponse clone() => StreamServerEventsResponse()..mergeFromMessage(this);
  @$core.Deprecated(
  'Using this can add significant overhead to your binary. '
  'Use [GeneratedMessageGenericExtensions.rebuild] instead. '
  'Will be removed in next major version')
  StreamServerEventsResponse copyWith(void Function(StreamServerEventsResponse) updates) => super.copyWith((message) => updates(message as StreamServerEventsResponse)) as StreamServerEventsResponse; // ignore: deprecated_member_use
  $pb.BuilderInfo get info_ => _i;
  @$core.pragma('dart2js:noInline')
  static StreamServerEventsResponse create() => StreamServerEventsResponse._();
  StreamServerEventsResponse createEmptyInstance() => create();
  static $pb.PbList<StreamServerEventsResponse> createRepeated() => $pb.PbList<StreamServerEventsResponse>();
  @$core.pragma('dart2js:noInline')
  static StreamServerEventsResponse getDefault() => _defaultInstance ??= $pb.GeneratedMessage.$_defaultFor<StreamServerEventsResponse>(create);
  static StreamServerEventsResponse? _defaultInstance;

  @$pb.TagNumber(1)
  $fixnum.Int64 get eventId => $_getI64(0);
  @$pb.TagNumber(1)
  set eventId($fixnum.Int64 v) { $_setInt64(0, v); }
  @$pb.TagNumber(1)
  $core.bool hasEventId() => $_has(0);
  @$pb.TagNumber(1)
  void clearEventId() => clearField(1);

  @$pb.TagNumber(2)
  $core.String get channel => $_getSZ(1);
  @$pb.TagNumber(2)
  set channel($core.String v) { $_setString(1, v); }
  @$pb.TagNumber(2)
  $core.bool hasChannel() => $_has(1);
  @$pb.TagNumber(2)
  void clearChannel() => clearField(2);

  @$pb.TagNumber(4)
  $core.String get selector => $_getSZ(2);
  @$pb.TagNumber(4)
  set selector($core.String v) { $_setString(2, v); }
  @$pb.TagNumber(4)
  $core.bool hasSelector() => $_has(2);
  @$pb.TagNumber(4)
  void clearSelector() => clearField(4);

  @$pb.TagNumber(5)
  $core.String get json => $_getSZ(3);
  @$pb.TagNumber(5)
  set json($core.String v) { $_setString(3, v); }
  @$pb.TagNumber(5)
  $core.bool hasJson() => $_has(3);
  @$pb.TagNumber(5)
  void clearJson() => clearField(5);

  @$pb.TagNumber(6)
  $core.String get op => $_getSZ(4);
  @$pb.TagNumber(6)
  set op($core.String v) { $_setString(4, v); }
  @$pb.TagNumber(6)
  $core.bool hasOp() => $_has(4);
  @$pb.TagNumber(6)
  void clearOp() => clearField(6);

  @$pb.TagNumber(7)
  $core.String get target => $_getSZ(5);
  @$pb.TagNumber(7)
  set target($core.String v) { $_setString(5, v); }
  @$pb.TagNumber(7)
  $core.bool hasTarget() => $_has(5);
  @$pb.TagNumber(7)
  void clearTarget() => clearField(7);

  @$pb.TagNumber(8)
  $core.String get cssSelector => $_getSZ(6);
  @$pb.TagNumber(8)
  set cssSelector($core.String v) { $_setString(6, v); }
  @$pb.TagNumber(8)
  $core.bool hasCssSelector() => $_has(6);
  @$pb.TagNumber(8)
  void clearCssSelector() => clearField(8);

  @$pb.TagNumber(9)
  $core.Map<$core.String, $core.String> get meta => $_getMap(7);

  @$pb.TagNumber(10)
  $core.String get userId => $_getSZ(8);
  @$pb.TagNumber(10)
  set userId($core.String v) { $_setString(8, v); }
  @$pb.TagNumber(10)
  $core.bool hasUserId() => $_has(8);
  @$pb.TagNumber(10)
  void clearUserId() => clearField(10);

  @$pb.TagNumber(11)
  $core.String get displayName => $_getSZ(9);
  @$pb.TagNumber(11)
  set displayName($core.String v) { $_setString(9, v); }
  @$pb.TagNumber(11)
  $core.bool hasDisplayName() => $_has(9);
  @$pb.TagNumber(11)
  void clearDisplayName() => clearField(11);

  @$pb.TagNumber(12)
  $core.String get profileUrl => $_getSZ(10);
  @$pb.TagNumber(12)
  set profileUrl($core.String v) { $_setString(10, v); }
  @$pb.TagNumber(12)
  $core.bool hasProfileUrl() => $_has(10);
  @$pb.TagNumber(12)
  void clearProfileUrl() => clearField(12);

  @$pb.TagNumber(13)
  $core.bool get isAuthenticated => $_getBF(11);
  @$pb.TagNumber(13)
  set isAuthenticated($core.bool v) { $_setBool(11, v); }
  @$pb.TagNumber(13)
  $core.bool hasIsAuthenticated() => $_has(11);
  @$pb.TagNumber(13)
  void clearIsAuthenticated() => clearField(13);

  @$pb.TagNumber(14)
  $core.List<$core.String> get channels => $_getList(12);

  @$pb.TagNumber(15)
  $fixnum.Int64 get createdAt => $_getI64(13);
  @$pb.TagNumber(15)
  set createdAt($fixnum.Int64 v) { $_setInt64(13, v); }
  @$pb.TagNumber(15)
  $core.bool hasCreatedAt() => $_has(13);
  @$pb.TagNumber(15)
  void clearCreatedAt() => clearField(15);

  @$pb.TagNumber(21)
  $core.String get id => $_getSZ(14);
  @$pb.TagNumber(21)
  set id($core.String v) { $_setString(14, v); }
  @$pb.TagNumber(21)
  $core.bool hasId() => $_has(14);
  @$pb.TagNumber(21)
  void clearId() => clearField(21);

  @$pb.TagNumber(22)
  $core.String get unRegisterUrl => $_getSZ(15);
  @$pb.TagNumber(22)
  set unRegisterUrl($core.String v) { $_setString(15, v); }
  @$pb.TagNumber(22)
  $core.bool hasUnRegisterUrl() => $_has(15);
  @$pb.TagNumber(22)
  void clearUnRegisterUrl() => clearField(22);

  @$pb.TagNumber(23)
  $core.String get updateSubscriberUrl => $_getSZ(16);
  @$pb.TagNumber(23)
  set updateSubscriberUrl($core.String v) { $_setString(16, v); }
  @$pb.TagNumber(23)
  $core.bool hasUpdateSubscriberUrl() => $_has(16);
  @$pb.TagNumber(23)
  void clearUpdateSubscriberUrl() => clearField(23);

  @$pb.TagNumber(24)
  $core.String get heartbeatUrl => $_getSZ(17);
  @$pb.TagNumber(24)
  set heartbeatUrl($core.String v) { $_setString(17, v); }
  @$pb.TagNumber(24)
  $core.bool hasHeartbeatUrl() => $_has(17);
  @$pb.TagNumber(24)
  void clearHeartbeatUrl() => clearField(24);

  @$pb.TagNumber(25)
  $fixnum.Int64 get heartbeatIntervalMs => $_getI64(18);
  @$pb.TagNumber(25)
  set heartbeatIntervalMs($fixnum.Int64 v) { $_setInt64(18, v); }
  @$pb.TagNumber(25)
  $core.bool hasHeartbeatIntervalMs() => $_has(18);
  @$pb.TagNumber(25)
  void clearHeartbeatIntervalMs() => clearField(25);

  @$pb.TagNumber(26)
  $fixnum.Int64 get idleTimeoutMs => $_getI64(19);
  @$pb.TagNumber(26)
  set idleTimeoutMs($fixnum.Int64 v) { $_setInt64(19, v); }
  @$pb.TagNumber(26)
  $core.bool hasIdleTimeoutMs() => $_has(19);
  @$pb.TagNumber(26)
  void clearIdleTimeoutMs() => clearField(26);

  @$pb.TagNumber(30)
  ResponseStatus get responseStatus => $_getN(20);
  @$pb.TagNumber(30)
  set responseStatus(ResponseStatus v) { setField(30, v); }
  @$pb.TagNumber(30)
  $core.bool hasResponseStatus() => $_has(20);
  @$pb.TagNumber(30)
  void clearResponseStatus() => clearField(30);
  @$pb.TagNumber(30)
  ResponseStatus ensureResponseStatus() => $_ensure(20);
}

my_app_flutter\lib\services.pbenum.dart

///
//  Generated code. Do not modify.
//  source: services.proto
//
// @dart = 2.12
// ignore_for_file: annotate_overrides,camel_case_types,constant_identifier_names,directives_ordering,library_prefixes,non_constant_identifier_names,prefer_final_fields,return_of_invalid_type,unnecessary_const,unnecessary_import,unnecessary_this,unused_import,unused_shown_name

my_app_flutter\lib\services.pbgrpc.dart

///
//  Generated code. Do not modify.
//  source: services.proto
//
// @dart = 2.12
// ignore_for_file: annotate_overrides,camel_case_types,constant_identifier_names,directives_ordering,library_prefixes,non_constant_identifier_names,prefer_final_fields,return_of_invalid_type,unnecessary_const,unnecessary_import,unnecessary_this,unused_import,unused_shown_name

import 'dart:async' as $async;

import 'dart:core' as $core;

import 'package:grpc/service_api.dart' as $grpc;
import 'services.pb.dart' as $0;
export 'services.pb.dart';

class GrpcServicesClient extends $grpc.Client {
  static final _$getHello = $grpc.ClientMethod<$0.Hello, $0.HelloResponse>(
      '/GrpcServices/GetHello',
      ($0.Hello value) => value.writeToBuffer(),
      ($core.List<$core.int> value) => $0.HelloResponse.fromBuffer(value));
  static final _$postHello = $grpc.ClientMethod<$0.Hello, $0.HelloResponse>(
      '/GrpcServices/PostHello',
      ($0.Hello value) => value.writeToBuffer(),
      ($core.List<$core.int> value) => $0.HelloResponse.fromBuffer(value));
  static final _$putHello = $grpc.ClientMethod<$0.Hello, $0.HelloResponse>(
      '/GrpcServices/PutHello',
      ($0.Hello value) => value.writeToBuffer(),
      ($core.List<$core.int> value) => $0.HelloResponse.fromBuffer(value));
  static final _$deleteHello = $grpc.ClientMethod<$0.Hello, $0.HelloResponse>(
      '/GrpcServices/DeleteHello',
      ($0.Hello value) => value.writeToBuffer(),
      ($core.List<$core.int> value) => $0.HelloResponse.fromBuffer(value));
  static final _$serverStreamFiles =
      $grpc.ClientMethod<$0.StreamFiles, $0.FileContent>(
          '/GrpcServices/ServerStreamFiles',
          ($0.StreamFiles value) => value.writeToBuffer(),
          ($core.List<$core.int> value) => $0.FileContent.fromBuffer(value));
  static final _$serverStreamServerEvents =
      $grpc.ClientMethod<$0.StreamServerEvents, $0.StreamServerEventsResponse>(
          '/GrpcServices/ServerStreamServerEvents',
          ($0.StreamServerEvents value) => value.writeToBuffer(),
          ($core.List<$core.int> value) =>
              $0.StreamServerEventsResponse.fromBuffer(value));

  GrpcServicesClient($grpc.ClientChannel channel,
      {$grpc.CallOptions? options,
      $core.Iterable<$grpc.ClientInterceptor>? interceptors})
      : super(channel, options: options, interceptors: interceptors);

  $grpc.ResponseFuture<$0.HelloResponse> getHello($0.Hello request,
      {$grpc.CallOptions? options}) {
    return $createUnaryCall(_$getHello, request, options: options);
  }

  $grpc.ResponseFuture<$0.HelloResponse> postHello($0.Hello request,
      {$grpc.CallOptions? options}) {
    return $createUnaryCall(_$postHello, request, options: options);
  }

  $grpc.ResponseFuture<$0.HelloResponse> putHello($0.Hello request,
      {$grpc.CallOptions? options}) {
    return $createUnaryCall(_$putHello, request, options: options);
  }

  $grpc.ResponseFuture<$0.HelloResponse> deleteHello($0.Hello request,
      {$grpc.CallOptions? options}) {
    return $createUnaryCall(_$deleteHello, request, options: options);
  }

  $grpc.ResponseStream<$0.FileContent> serverStreamFiles($0.StreamFiles request,
      {$grpc.CallOptions? options}) {
    return $createStreamingCall(
        _$serverStreamFiles, $async.Stream.fromIterable([request]),
        options: options);
  }

  $grpc.ResponseStream<$0.StreamServerEventsResponse> serverStreamServerEvents(
      $0.StreamServerEvents request,
      {$grpc.CallOptions? options}) {
    return $createStreamingCall(
        _$serverStreamServerEvents, $async.Stream.fromIterable([request]),
        options: options);
  }
}

abstract class GrpcServicesServiceBase extends $grpc.Service {
  $core.String get $name => 'GrpcServices';

  GrpcServicesServiceBase() {
    $addMethod($grpc.ServiceMethod<$0.Hello, $0.HelloResponse>(
        'GetHello',
        getHello_Pre,
        false,
        false,
        ($core.List<$core.int> value) => $0.Hello.fromBuffer(value),
        ($0.HelloResponse value) => value.writeToBuffer()));
    $addMethod($grpc.ServiceMethod<$0.Hello, $0.HelloResponse>(
        'PostHello',
        postHello_Pre,
        false,
        false,
        ($core.List<$core.int> value) => $0.Hello.fromBuffer(value),
        ($0.HelloResponse value) => value.writeToBuffer()));
    $addMethod($grpc.ServiceMethod<$0.Hello, $0.HelloResponse>(
        'PutHello',
        putHello_Pre,
        false,
        false,
        ($core.List<$core.int> value) => $0.Hello.fromBuffer(value),
        ($0.HelloResponse value) => value.writeToBuffer()));
    $addMethod($grpc.ServiceMethod<$0.Hello, $0.HelloResponse>(
        'DeleteHello',
        deleteHello_Pre,
        false,
        false,
        ($core.List<$core.int> value) => $0.Hello.fromBuffer(value),
        ($0.HelloResponse value) => value.writeToBuffer()));
    $addMethod($grpc.ServiceMethod<$0.StreamFiles, $0.FileContent>(
        'ServerStreamFiles',
        serverStreamFiles_Pre,
        false,
        true,
        ($core.List<$core.int> value) => $0.StreamFiles.fromBuffer(value),
        ($0.FileContent value) => value.writeToBuffer()));
    $addMethod($grpc.ServiceMethod<$0.StreamServerEvents,
            $0.StreamServerEventsResponse>(
        'ServerStreamServerEvents',
        serverStreamServerEvents_Pre,
        false,
        true,
        ($core.List<$core.int> value) =>
            $0.StreamServerEvents.fromBuffer(value),
        ($0.StreamServerEventsResponse value) => value.writeToBuffer()));
  }

  $async.Future<$0.HelloResponse> getHello_Pre(
      $grpc.ServiceCall call, $async.Future<$0.Hello> request) async {
    return getHello(call, await request);
  }

  $async.Future<$0.HelloResponse> postHello_Pre(
      $grpc.ServiceCall call, $async.Future<$0.Hello> request) async {
    return postHello(call, await request);
  }

  $async.Future<$0.HelloResponse> putHello_Pre(
      $grpc.ServiceCall call, $async.Future<$0.Hello> request) async {
    return putHello(call, await request);
  }

  $async.Future<$0.HelloResponse> deleteHello_Pre(
      $grpc.ServiceCall call, $async.Future<$0.Hello> request) async {
    return deleteHello(call, await request);
  }

  $async.Stream<$0.FileContent> serverStreamFiles_Pre(
      $grpc.ServiceCall call, $async.Future<$0.StreamFiles> request) async* {
    yield* serverStreamFiles(call, await request);
  }

  $async.Stream<$0.StreamServerEventsResponse> serverStreamServerEvents_Pre(
      $grpc.ServiceCall call,
      $async.Future<$0.StreamServerEvents> request) async* {
    yield* serverStreamServerEvents(call, await request);
  }

  $async.Future<$0.HelloResponse> getHello(
      $grpc.ServiceCall call, $0.Hello request);
  $async.Future<$0.HelloResponse> postHello(
      $grpc.ServiceCall call, $0.Hello request);
  $async.Future<$0.HelloResponse> putHello(
      $grpc.ServiceCall call, $0.Hello request);
  $async.Future<$0.HelloResponse> deleteHello(
      $grpc.ServiceCall call, $0.Hello request);
  $async.Stream<$0.FileContent> serverStreamFiles(
      $grpc.ServiceCall call, $0.StreamFiles request);
  $async.Stream<$0.StreamServerEventsResponse> serverStreamServerEvents(
      $grpc.ServiceCall call, $0.StreamServerEvents request);
}

my_app_flutter\lib\services.pbjson.dart

///
//  Generated code. Do not modify.
//  source: services.proto
//
// @dart = 2.12
// ignore_for_file: annotate_overrides,camel_case_types,constant_identifier_names,deprecated_member_use_from_same_package,directives_ordering,library_prefixes,non_constant_identifier_names,prefer_final_fields,return_of_invalid_type,unnecessary_const,unnecessary_import,unnecessary_this,unused_import,unused_shown_name

import 'dart:core' as $core;
import 'dart:convert' as $convert;
import 'dart:typed_data' as $typed_data;
@$core.Deprecated('Use fileContentDescriptor instead')
const FileContent$json = const {
  '1': 'FileContent',
  '2': const [
    const {'1': 'Name', '3': 1, '4': 1, '5': 9, '10': 'Name'},
    const {'1': 'Type', '3': 2, '4': 1, '5': 9, '10': 'Type'},
    const {'1': 'Length', '3': 3, '4': 1, '5': 5, '10': 'Length'},
    const {'1': 'Body', '3': 4, '4': 1, '5': 12, '10': 'Body'},
    const {'1': 'ResponseStatus', '3': 5, '4': 1, '5': 11, '6': '.ResponseStatus', '10': 'ResponseStatus'},
  ],
};

/// Descriptor for `FileContent`. Decode as a `google.protobuf.DescriptorProto`.
final $typed_data.Uint8List fileContentDescriptor = $convert.base64Decode('CgtGaWxlQ29udGVudBISCgROYW1lGAEgASgJUgROYW1lEhIKBFR5cGUYAiABKAlSBFR5cGUSFgoGTGVuZ3RoGAMgASgFUgZMZW5ndGgSEgoEQm9keRgEIAEoDFIEQm9keRI3Cg5SZXNwb25zZVN0YXR1cxgFIAEoCzIPLlJlc3BvbnNlU3RhdHVzUg5SZXNwb25zZVN0YXR1cw==');
@$core.Deprecated('Use helloDescriptor instead')
const Hello$json = const {
  '1': 'Hello',
  '2': const [
    const {'1': 'Name', '3': 1, '4': 1, '5': 9, '10': 'Name'},
  ],
};

/// Descriptor for `Hello`. Decode as a `google.protobuf.DescriptorProto`.
final $typed_data.Uint8List helloDescriptor = $convert.base64Decode('CgVIZWxsbxISCgROYW1lGAEgASgJUgROYW1l');
@$core.Deprecated('Use helloResponseDescriptor instead')
const HelloResponse$json = const {
  '1': 'HelloResponse',
  '2': const [
    const {'1': 'Result', '3': 1, '4': 1, '5': 9, '10': 'Result'},
    const {'1': 'ResponseStatus', '3': 2, '4': 1, '5': 11, '6': '.ResponseStatus', '10': 'ResponseStatus'},
  ],
};

/// Descriptor for `HelloResponse`. Decode as a `google.protobuf.DescriptorProto`.
final $typed_data.Uint8List helloResponseDescriptor = $convert.base64Decode('Cg1IZWxsb1Jlc3BvbnNlEhYKBlJlc3VsdBgBIAEoCVIGUmVzdWx0EjcKDlJlc3BvbnNlU3RhdHVzGAIgASgLMg8uUmVzcG9uc2VTdGF0dXNSDlJlc3BvbnNlU3RhdHVz');
@$core.Deprecated('Use responseErrorDescriptor instead')
const ResponseError$json = const {
  '1': 'ResponseError',
  '2': const [
    const {'1': 'ErrorCode', '3': 1, '4': 1, '5': 9, '10': 'ErrorCode'},
    const {'1': 'FieldName', '3': 2, '4': 1, '5': 9, '10': 'FieldName'},
    const {'1': 'Message', '3': 3, '4': 1, '5': 9, '10': 'Message'},
    const {'1': 'Meta', '3': 4, '4': 3, '5': 11, '6': '.ResponseError.MetaEntry', '10': 'Meta'},
  ],
  '3': const [ResponseError_MetaEntry$json],
};

@$core.Deprecated('Use responseErrorDescriptor instead')
const ResponseError_MetaEntry$json = const {
  '1': 'MetaEntry',
  '2': const [
    const {'1': 'key', '3': 1, '4': 1, '5': 9, '10': 'key'},
    const {'1': 'value', '3': 2, '4': 1, '5': 9, '10': 'value'},
  ],
  '7': const {'7': true},
};

/// Descriptor for `ResponseError`. Decode as a `google.protobuf.DescriptorProto`.
final $typed_data.Uint8List responseErrorDescriptor = $convert.base64Decode('Cg1SZXNwb25zZUVycm9yEhwKCUVycm9yQ29kZRgBIAEoCVIJRXJyb3JDb2RlEhwKCUZpZWxkTmFtZRgCIAEoCVIJRmllbGROYW1lEhgKB01lc3NhZ2UYAyABKAlSB01lc3NhZ2USLAoETWV0YRgEIAMoCzIYLlJlc3BvbnNlRXJyb3IuTWV0YUVudHJ5UgRNZXRhGjcKCU1ldGFFbnRyeRIQCgNrZXkYASABKAlSA2tleRIUCgV2YWx1ZRgCIAEoCVIFdmFsdWU6AjgB');
@$core.Deprecated('Use responseStatusDescriptor instead')
const ResponseStatus$json = const {
  '1': 'ResponseStatus',
  '2': const [
    const {'1': 'ErrorCode', '3': 1, '4': 1, '5': 9, '10': 'ErrorCode'},
    const {'1': 'Message', '3': 2, '4': 1, '5': 9, '10': 'Message'},
    const {'1': 'StackTrace', '3': 3, '4': 1, '5': 9, '10': 'StackTrace'},
    const {'1': 'Errors', '3': 4, '4': 3, '5': 11, '6': '.ResponseError', '10': 'Errors'},
    const {'1': 'Meta', '3': 5, '4': 3, '5': 11, '6': '.ResponseStatus.MetaEntry', '10': 'Meta'},
  ],
  '3': const [ResponseStatus_MetaEntry$json],
};

@$core.Deprecated('Use responseStatusDescriptor instead')
const ResponseStatus_MetaEntry$json = const {
  '1': 'MetaEntry',
  '2': const [
    const {'1': 'key', '3': 1, '4': 1, '5': 9, '10': 'key'},
    const {'1': 'value', '3': 2, '4': 1, '5': 9, '10': 'value'},
  ],
  '7': const {'7': true},
};

/// Descriptor for `ResponseStatus`. Decode as a `google.protobuf.DescriptorProto`.
final $typed_data.Uint8List responseStatusDescriptor = $convert.base64Decode('Cg5SZXNwb25zZVN0YXR1cxIcCglFcnJvckNvZGUYASABKAlSCUVycm9yQ29kZRIYCgdNZXNzYWdlGAIgASgJUgdNZXNzYWdlEh4KClN0YWNrVHJhY2UYAyABKAlSClN0YWNrVHJhY2USJgoGRXJyb3JzGAQgAygLMg4uUmVzcG9uc2VFcnJvclIGRXJyb3JzEi0KBE1ldGEYBSADKAsyGS5SZXNwb25zZVN0YXR1cy5NZXRhRW50cnlSBE1ldGEaNwoJTWV0YUVudHJ5EhAKA2tleRgBIAEoCVIDa2V5EhQKBXZhbHVlGAIgASgJUgV2YWx1ZToCOAE=');
@$core.Deprecated('Use streamFilesDescriptor instead')
const StreamFiles$json = const {
  '1': 'StreamFiles',
  '2': const [
    const {'1': 'Paths', '3': 1, '4': 3, '5': 9, '10': 'Paths'},
  ],
};

/// Descriptor for `StreamFiles`. Decode as a `google.protobuf.DescriptorProto`.
final $typed_data.Uint8List streamFilesDescriptor = $convert.base64Decode('CgtTdHJlYW1GaWxlcxIUCgVQYXRocxgBIAMoCVIFUGF0aHM=');
@$core.Deprecated('Use streamServerEventsDescriptor instead')
const StreamServerEvents$json = const {
  '1': 'StreamServerEvents',
  '2': const [
    const {'1': 'Channels', '3': 1, '4': 3, '5': 9, '10': 'Channels'},
  ],
};

/// Descriptor for `StreamServerEvents`. Decode as a `google.protobuf.DescriptorProto`.
final $typed_data.Uint8List streamServerEventsDescriptor = $convert.base64Decode('ChJTdHJlYW1TZXJ2ZXJFdmVudHMSGgoIQ2hhbm5lbHMYASADKAlSCENoYW5uZWxz');
@$core.Deprecated('Use streamServerEventsResponseDescriptor instead')
const StreamServerEventsResponse$json = const {
  '1': 'StreamServerEventsResponse',
  '2': const [
    const {'1': 'EventId', '3': 1, '4': 1, '5': 3, '10': 'EventId'},
    const {'1': 'Channel', '3': 2, '4': 1, '5': 9, '10': 'Channel'},
    const {'1': 'Selector', '3': 4, '4': 1, '5': 9, '10': 'Selector'},
    const {'1': 'Json', '3': 5, '4': 1, '5': 9, '10': 'Json'},
    const {'1': 'Op', '3': 6, '4': 1, '5': 9, '10': 'Op'},
    const {'1': 'Target', '3': 7, '4': 1, '5': 9, '10': 'Target'},
    const {'1': 'CssSelector', '3': 8, '4': 1, '5': 9, '10': 'CssSelector'},
    const {'1': 'Meta', '3': 9, '4': 3, '5': 11, '6': '.StreamServerEventsResponse.MetaEntry', '10': 'Meta'},
    const {'1': 'UserId', '3': 10, '4': 1, '5': 9, '10': 'UserId'},
    const {'1': 'DisplayName', '3': 11, '4': 1, '5': 9, '10': 'DisplayName'},
    const {'1': 'ProfileUrl', '3': 12, '4': 1, '5': 9, '10': 'ProfileUrl'},
    const {'1': 'IsAuthenticated', '3': 13, '4': 1, '5': 8, '10': 'IsAuthenticated'},
    const {'1': 'Channels', '3': 14, '4': 3, '5': 9, '10': 'Channels'},
    const {'1': 'CreatedAt', '3': 15, '4': 1, '5': 3, '10': 'CreatedAt'},
    const {'1': 'Id', '3': 21, '4': 1, '5': 9, '10': 'Id'},
    const {'1': 'UnRegisterUrl', '3': 22, '4': 1, '5': 9, '10': 'UnRegisterUrl'},
    const {'1': 'UpdateSubscriberUrl', '3': 23, '4': 1, '5': 9, '10': 'UpdateSubscriberUrl'},
    const {'1': 'HeartbeatUrl', '3': 24, '4': 1, '5': 9, '10': 'HeartbeatUrl'},
    const {'1': 'HeartbeatIntervalMs', '3': 25, '4': 1, '5': 3, '10': 'HeartbeatIntervalMs'},
    const {'1': 'IdleTimeoutMs', '3': 26, '4': 1, '5': 3, '10': 'IdleTimeoutMs'},
    const {'1': 'ResponseStatus', '3': 30, '4': 1, '5': 11, '6': '.ResponseStatus', '10': 'ResponseStatus'},
  ],
  '3': const [StreamServerEventsResponse_MetaEntry$json],
};

@$core.Deprecated('Use streamServerEventsResponseDescriptor instead')
const StreamServerEventsResponse_MetaEntry$json = const {
  '1': 'MetaEntry',
  '2': const [
    const {'1': 'key', '3': 1, '4': 1, '5': 9, '10': 'key'},
    const {'1': 'value', '3': 2, '4': 1, '5': 9, '10': 'value'},
  ],
  '7': const {'7': true},
};

/// Descriptor for `StreamServerEventsResponse`. Decode as a `google.protobuf.DescriptorProto`.
final $typed_data.Uint8List streamServerEventsResponseDescriptor = $convert.base64Decode('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');

my_app_flutter\lib\services.proto

/* Options:
Date: 2023-02-20 10:01:02
Version: 6.60
Tip: To override a DTO option, remove "//" prefix before updating
BaseUrl: https://localhost:5001

//GlobalNamespace: 
//AddDescriptionAsComments: True
*/

syntax = "proto3";

service GrpcServices {

    rpc GetHello(Hello) returns (HelloResponse) {}

    rpc PostHello(Hello) returns (HelloResponse) {}

    rpc PutHello(Hello) returns (HelloResponse) {}

    rpc DeleteHello(Hello) returns (HelloResponse) {}

    rpc ServerStreamFiles(StreamFiles) returns (stream FileContent) {}

    rpc ServerStreamServerEvents(StreamServerEvents) returns (stream StreamServerEventsResponse) {}
}

message FileContent {
   string Name = 1;
   string Type = 2;
   int32 Length = 3;
   bytes Body = 4;
   ResponseStatus ResponseStatus = 5;
}
message Hello {
   string Name = 1;
}
message HelloResponse {
   string Result = 1;
   ResponseStatus ResponseStatus = 2;
}
message ResponseError {
   string ErrorCode = 1;
   string FieldName = 2;
   string Message = 3;
   map<string,string> Meta = 4;
}
message ResponseStatus {
   string ErrorCode = 1;
   string Message = 2;
   string StackTrace = 3;
   repeated ResponseError Errors = 4;
   map<string,string> Meta = 5;
}
message StreamFiles {
   repeated string Paths = 1;
}
message StreamServerEvents {
   repeated string Channels = 1;
}
message StreamServerEventsResponse {
   int64 EventId = 1;
   string Channel = 2;
   string Selector = 4;
   string Json = 5;
   string Op = 6;
   string Target = 7;
   string CssSelector = 8;
   map<string,string> Meta = 9;
   string UserId = 10;
   string DisplayName = 11;
   string ProfileUrl = 12;
   bool IsAuthenticated = 13;
   repeated string Channels = 14;
   int64 CreatedAt = 15;
   string Id = 21;
   string UnRegisterUrl = 22;
   string UpdateSubscriberUrl = 23;
   string HeartbeatUrl = 24;
   int64 HeartbeatIntervalMs = 25;
   int64 IdleTimeoutMs = 26;
   ResponseStatus ResponseStatus = 30;
}

my_app_flutter\test\widget_test.dart

// This is a basic Flutter widget test.
//
// To perform an interaction with a widget in your test, use the WidgetTester
// utility in the flutter_test package. For example, you can send tap and scroll
// gestures. You can also use WidgetTester to find child widgets in the widget
// tree, read text, and verify that the values of widget properties are correct.

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';

import 'package:my_app_flutter/main.dart';

void main() {
  testWidgets('Counter increments smoke test', (WidgetTester tester) async {
    // Build our app and trigger a frame.
    await tester.pumpWidget(const MyApp());

    // Verify that our counter starts at 0.
    expect(find.text('0'), findsOneWidget);
    expect(find.text('1'), findsNothing);

    // Tap the '+' icon and trigger a frame.
    await tester.tap(find.byIcon(Icons.add));
    await tester.pump();

    // Verify that our counter has incremented.
    expect(find.text('0'), findsNothing);
    expect(find.text('1'), findsOneWidget);
  });
}