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36 lines
1.4 KiB
Dart
36 lines
1.4 KiB
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'dart:async';
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import 'dart:convert';
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import 'dart:html' as html;
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import 'dart:js';
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import 'dart:js_util' as js_util;
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/// The web implementation of [registerWebServiceExtension].
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///
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/// Adds a hidden `window.$flutterDriver` JavaScript function that's called by
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/// `FlutterWebDriver` to fulfill FlutterDriver commands.
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///
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/// See also:
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///
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/// * `_extension_io.dart`, which has the dart:io implementation
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void registerWebServiceExtension(Future<Map<String, dynamic>> Function(Map<String, String>) callback) {
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js_util.setProperty(html.window, r'$flutterDriver', allowInterop((dynamic message) async {
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try {
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final Map<String, dynamic> messageJson = jsonDecode(message as String) as Map<String, dynamic>;
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final Map<String, String> params = messageJson.cast<String, String>();
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final Map<String, dynamic> result = await callback(params);
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context[r'$flutterDriverResult'] = json.encode(result);
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} catch (error, stackTrace) {
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// Encode the error in the same format the FlutterDriver extension uses.
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// See //packages/flutter_driver/lib/src/extension/extension.dart
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context[r'$flutterDriverResult'] = json.encode(<String, dynamic>{
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'isError': true,
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'response': '$error\n$stackTrace',
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});
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}
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}));
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}
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