89 lines
2.7 KiB
Dart
89 lines
2.7 KiB
Dart
import 'dart:convert';
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import 'package:http/http.dart' as http;
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class ApiException implements Exception {
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const ApiException(this.code, this.message);
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final int code;
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final String message;
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@override
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String toString() => message;
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}
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class ApiClient {
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ApiClient(
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this._tokenProvider, {
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http.Client? client,
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String? baseUrl,
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}) : _client = client ?? http.Client(),
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baseUrl =
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baseUrl ??
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const String.fromEnvironment(
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'API_BASE_URL',
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defaultValue: 'http://10.0.2.2:12426',
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);
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final String baseUrl;
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final String Function() _tokenProvider;
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final http.Client _client;
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Future<Object?> get(String path, {bool authenticated = true}) =>
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_send('GET', path, authenticated: authenticated);
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Future<Object?> post(
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String path, {
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Map<String, Object?>? body,
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bool authenticated = true,
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}) => _send('POST', path, body: body, authenticated: authenticated);
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Future<Object?> put(String path, {Map<String, Object?>? body}) => _send('PUT', path, body: body);
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Future<Object?> delete(String path, {Map<String, Object?>? body}) =>
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_send('DELETE', path, body: body);
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Future<Object?> _send(
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String method,
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String path, {
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Map<String, Object?>? body,
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bool authenticated = true,
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}) async {
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final request = http.Request(method, Uri.parse('$baseUrl$path'));
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request.headers['accept'] = 'application/json';
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if (authenticated) {
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final token = _tokenProvider();
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if (token.isNotEmpty) request.headers['authorization'] = token;
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}
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if (body != null) {
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request.headers['content-type'] = 'application/json; charset=UTF-8';
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request.body = jsonEncode(body);
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}
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final streamed = await _client.send(request);
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final response = await http.Response.fromStream(streamed);
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if (response.statusCode < 200 || response.statusCode >= 300) {
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throw ApiException(response.statusCode, '网络请求失败（${response.statusCode}）');
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}
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final decoded = jsonDecode(response.body);
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if (decoded is! Map<String, Object?>) {
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throw const ApiException(500, '服务端响应格式错误');
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}
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final code = (decoded['code'] as num?)?.toInt() ?? 500;
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if (code != 0) {
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throw ApiException(code, decoded['message'] as String? ?? '操作失败');
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}
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return decoded['details'];
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}
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}
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Map<String, Object?> jsonMap(Object? value) {
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if (value is Map<String, Object?>) return value;
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if (value is Map) return value.map((key, item) => MapEntry(key.toString(), item));
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throw const ApiException(500, '服务端数据格式错误');
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}
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List<Map<String, Object?>> jsonList(Object? value) {
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if (value is! List) return const [];
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return value.map<Map<String, Object?>>(jsonMap).toList(growable: false);
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}
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