request_client.dart
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import 'dart:convert';
import 'package:dio/dio.dart';
import 'package:flutter/foundation.dart';
import 'package:pretty_dio_logger/pretty_dio_logger.dart';
import '../core/user_util.dart';
import 'api_response/api_response_entity.dart';
import 'api_response/raw_data.dart';
import 'config.dart';
import 'exception.dart';
import 'token_interceptor.dart';
RequestClient requestClient = RequestClient();
class RequestClient {
late Dio _dio;
RequestClient() {
_dio = Dio(BaseOptions(baseUrl: RequestConfig.baseUrl, connectTimeout: RequestConfig.connectTimeout));
_dio.interceptors.add(TokenInterceptor());
if (kDebugMode) {
_dio.interceptors
.add(PrettyDioLogger(requestHeader: true, requestBody: true, responseHeader: true, maxWidth: 120));
}
}
Future<T?> request<T>(
String url, {
required String method,
Map<String, dynamic>? queryParameters,
data,
Map<String, dynamic>? headers,
Function(ApiResponse<T>)? onResponse,
bool Function(ApiException)? onError,
}) async {
try {
Options options = Options()
..method = method
..headers = headers;
data = _convertRequestData(data);
Response response = await _dio.request(url, queryParameters: queryParameters, data: data, options: options);
print("response.body type=${response.data.runtimeType}");
return _handleResponse<T>(response, onResponse);
} catch (e) {
print("e type=${e.runtimeType}");
if (e is ApiException && e.code == 405) {
UserUtil.logout();
return null;
}
var exception = ApiException.from(e);
if (onError?.call(exception) != true) {
throw exception;
}
}
return null;
}
_convertRequestData(data) {
if (data != null) {
data = jsonDecode(jsonEncode(data));
}
return data;
}
/// get
Future<T?> get<T>(
String url, {
Map<String, dynamic>? queryParameters,
Map<String, dynamic>? headers,
bool showLoading = true,
Function(ApiResponse<T>)? onResponse,
bool Function(ApiException)? onError,
}) {
return request(url,
method: 'GET', queryParameters: queryParameters, headers: headers, onResponse: onResponse, onError: onError);
}
/// post
Future<T?> post<T>(
String url, {
Map<String, dynamic>? queryParameters,
data,
Map<String, dynamic>? headers,
bool showLoading = true,
Function(ApiResponse<T>)? onResponse,
bool Function(ApiException)? onError,
}) {
return request(url,
method: "POST",
queryParameters: queryParameters,
data: data,
headers: headers,
onResponse: onResponse,
onError: onError);
}
/// delete
Future<T?> delete<T>(
String url, {
Map<String, dynamic>? queryParameters,
data,
Map<String, dynamic>? headers,
bool showLoading = true,
Function(ApiResponse<T>)? onResponse,
bool Function(ApiException)? onError,
}) {
return request(url,
method: "DELETE",
queryParameters: queryParameters,
data: data,
headers: headers,
onResponse: onResponse,
onError: onError);
}
/// put
Future<T?> put<T>(
String url, {
Map<String, dynamic>? queryParameters,
data,
Map<String, dynamic>? headers,
bool showLoading = true,
Function(ApiResponse<T>)? onResponse,
bool Function(ApiException)? onError,
}) {
return request(url,
method: "PUT",
queryParameters: queryParameters,
data: data,
headers: headers,
onResponse: onResponse,
onError: onError);
}
/// 请求响应内容处理
T? _handleResponse<T>(
Response response,
Function(ApiResponse<T>)? onResponse,
) {
int statusCode = response.statusCode ?? -1;
// 200..299 成功响应
if (statusCode >= 200 && statusCode <= 299) {
if (T.toString() == (RawData).toString()) {
RawData raw = RawData();
raw.value = response.data;
return raw as T;
} else {
// 应对response的header中content-type: [text/html;charset=utf-8]的情况
// 实际上都是json格式返回
Map<String, dynamic> json;
if (response.data is String) {
json = jsonDecode(response.data);
} else {
json = response.data;
}
ApiResponse<T> apiResponse = ApiResponse.fromJson(json);
onResponse?.call(apiResponse);
return _handleBusinessResponse<T>(apiResponse);
}
} else {
ApiException exception = ApiException(response.statusCode, ApiException.unknownException);
print("_handleResponse exception type=${exception.runtimeType}");
throw exception;
}
}
/// 业务内容处理
T? _handleBusinessResponse<T>(ApiResponse<T> response) {
if (response.code == RequestConfig.successCode) {
return response.data;
} else {
ApiException exception = ApiException(response.code, response.msg);
print("_handleBusinessResponse exception type=${exception.runtimeType}");
throw exception;
}
}
}