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lib/utils/request/http_request.dart

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+import 'package:chat/utils/request/http_interceptor.dart';
+import 'package:chat/utils/request/http_options.dart';
+import 'package:dio/dio.dart';
+
+enum HttpMethod {
+  get,
+  post,
+  put,
+  delete,
+  patch,
+  head,
+}
+
+class HttpRequest {
+  static HttpRequest? _instance;
+  static Dio _dio = Dio();
+  Dio get dio => _dio;
+
+  HttpRequest._internal() {
+    _instance = this;
+    _instance!._init();
+  }
+
+  factory HttpRequest() => _instance ?? HttpRequest._internal();
+
+  static HttpRequest? getInstance() {
+    return _instance ?? HttpRequest._internal();
+  }
+
+  /// 取消请求token
+  final CancelToken _cancelToken = CancelToken();
+
+  _init() {
+    BaseOptions options = BaseOptions(
+      baseUrl: HttpOptions.baseUrl,
+      connectTimeout: HttpOptions.connectTimeout,
+      receiveTimeout: HttpOptions.receiveTimeout,
+    );
+    _dio = Dio(options);
+
+    /// 添加拦截器
+    _dio.interceptors.add(HttpInterceptor());
+  }
+
+  /// 请求
+  Future request(
+    String path, {
+    HttpMethod method = HttpMethod.get,
+    Map<String, dynamic>? params,
+    dynamic data,
+    Options? options,
+    CancelToken? cancelToken,
+    ProgressCallback? onSendProgress,
+    ProgressCallback? onReceiveProgress,
+  }) async {
+    const methodValues = {
+      HttpMethod.get: 'get',
+      HttpMethod.post: 'post',
+      HttpMethod.put: 'put',
+      HttpMethod.delete: 'delete',
+      HttpMethod.patch: 'patch',
+      HttpMethod.head: 'head'
+    };
+
+    options ??= Options(method: methodValues[method]);
+
+    try {
+      Response response = await _dio.request(
+        path,
+        data: data,
+        queryParameters: params,
+        cancelToken: cancelToken ?? _cancelToken,
+        options: options,
+        onSendProgress: onSendProgress,
+        onReceiveProgress: onReceiveProgress,
+      );
+      // ignore: avoid_print
+      print('请求地址：${response.requestOptions.uri}');
+      // ignore: avoid_print
+      print('响应数据：${response.data}');
+      return response.data;
+    } on DioError catch (e) {
+      throw Exception(e.message);
+    }
+  }
+
+  /// 取消网络请求
+  void cancelRequests({CancelToken? token}) {
+    token ?? _cancelToken.cancel('CANCELED');
+  }
+}