143 lines
3.8 KiB
Dart
143 lines
3.8 KiB
Dart
import 'dart:io';
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import 'package:dio/dio.dart';
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/// 全局接口异常
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class ApiException implements Exception {
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final String result;
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final String message;
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ApiException(this.result, this.message);
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@override
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String toString() => 'ApiException($result): $message';
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}
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/// HTTP 方法枚举
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enum Method { get, post, put, delete }
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/// HTTP 管理器 单例
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class HttpManager {
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HttpManager._internal() {
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_dio = Dio(BaseOptions(
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connectTimeout: const Duration(milliseconds: 10000),
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receiveTimeout: const Duration(milliseconds: 10000),
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headers: {
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'Content-Type': Headers.formUrlEncodedContentType,
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},
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));
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_initInterceptors();
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}
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static final HttpManager _instance = HttpManager._internal();
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factory HttpManager() => _instance;
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late final Dio _dio;
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void _initInterceptors() {
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_dio.interceptors
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..add(LogInterceptor(request: true, responseBody: true, error: true))
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..add(InterceptorsWrapper(onError: (err, handler) {
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// 全局错误处理，可根据 err.response?.statusCode 或 err.type 做不同处理
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handler.next(err);
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}));
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}
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/// 通用请求方法，返回完整后台 JSON
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Future<Map<String, dynamic>> request(
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String baseUrl,
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String path, {
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Method method = Method.post,
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Map<String, dynamic>? data,
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Map<String, dynamic>? params,
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CancelToken? cancelToken,
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}) async {
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Response resp;
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final url = baseUrl + path;
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final options = Options(
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method: method.name.toUpperCase(),
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contentType: Headers.formUrlEncodedContentType,
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);
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try {
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switch (method) {
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case Method.get:
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resp = await _dio.get(
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url,
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queryParameters: params,
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cancelToken: cancelToken,
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options: options,
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);
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break;
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case Method.put:
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resp = await _dio.put(
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url,
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data: data,
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queryParameters: params,
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cancelToken: cancelToken,
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options: options,
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);
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break;
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case Method.delete:
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resp = await _dio.delete(
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url,
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queryParameters: params,
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cancelToken: cancelToken,
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options: options,
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);
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break;
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case Method.post:
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resp = await _dio.post(
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url,
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data: data,
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queryParameters: params,
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cancelToken: cancelToken,
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options: options,
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);
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}
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} on DioException catch (e) {
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// 网络或服务器错误
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throw ApiException('network_error', e.message ?? e.toString());
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}
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// 解析返回 JSON
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final json = resp.data is Map<String, dynamic>
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? resp.data as Map<String, dynamic>
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: <String, dynamic>{};
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final result = json['result'] as String?;
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final msg = json['msg'] as String? ?? json['message'] as String? ?? '';
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if (result != 'success') {
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// 非 success 都抛异常
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throw ApiException(result ?? 'unknown', msg);
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}
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return json;
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}
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}
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/// 上传图片扩展
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extension HttpManagerUpload on HttpManager {
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Future<Map<String, dynamic>> uploadFaceImage({
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required String baseUrl,
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required String path,
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required Map<String, dynamic> fromData,
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CancelToken? cancelToken,
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}) async {
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final form = FormData.fromMap(fromData);
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try {
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final resp = await _dio.post(
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baseUrl + path,
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data: form,
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cancelToken: cancelToken,
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options: Options(
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method: Method.post.name.toUpperCase(),
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contentType: 'multipart/form-data',
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),
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);
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final json = resp.data is Map<String, dynamic>
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? resp.data as Map<String, dynamic>
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: <String, dynamic>{};
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return json;
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} on DioException catch (e) {
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throw ApiException('network_error', e.message ?? e.toString());
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}
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}
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}
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