mirror of https://github.com/grpc/grpc-dart.git
91 lines
2.5 KiB
Dart
91 lines
2.5 KiB
Dart
// Copyright (c) 2024, the gRPC project authors. Please see the AUTHORS file
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// for details. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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import 'dart:async';
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import 'package:web/web.dart';
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import 'src/generated/echo.pbgrpc.dart';
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class EchoApp {
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final EchoServiceClient _service;
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EchoApp(this._service);
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Future<void> echo(String message) async {
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_addLeftMessage(message);
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try {
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final response = await _service.echo(EchoRequest()..message = message);
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_addRightMessage(response.message);
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} catch (error) {
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_addRightMessage(error.toString());
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}
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}
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void repeatEcho(String message, int count) {
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_addLeftMessage(message);
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final request = ServerStreamingEchoRequest()
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..message = message
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..messageCount = count
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..messageInterval = 500;
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_service
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.serverStreamingEcho(request)
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.listen(
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(response) {
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_addRightMessage(response.message);
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},
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onError: (error) {
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_addRightMessage(error.toString());
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},
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onDone: () => print('Closed connection to server.'),
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);
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}
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void _addLeftMessage(String message) {
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_addMessage(message, 'label-primary pull-left');
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}
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void _addRightMessage(String message) {
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_addMessage(message, 'label-default pull-right');
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}
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void _addMessage(String message, String cssClass) {
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document
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.querySelector('#first')!
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.after(
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HTMLDivElement()
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..classList.add('row')
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..append(
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HTMLHeadingElement.h2()..append(
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HTMLSpanElement()
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..classList.add('label')
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..classList.addAll(cssClass)
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..textContent = message,
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),
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),
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);
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}
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}
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// The documentation of DOMTokenList.add implies it can handle multiple classes,
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// but in Chrome at least it does not.
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extension AddAll on DOMTokenList {
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void addAll(String cssClass) {
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final classes = cssClass.split(' ');
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for (final c in classes) {
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add(c);
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}
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}
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}
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