demo 地址: https://github.com/iotjin/jh_flutter_demo

Flutter Dio简单二次封装和自定义Header
Flutter Dio二次封装
Flutter Dio封装与使用
Flutter 封装 dio，支持 Restful Api
Flutter 网络请求框架封装

最新版添加了intercept.dart拦截器文件，做了空安全适配，其余代码也稍有不同，请前往GitHub查看最新代码

结构

apis 文件配置API 地址
dio_utils 文件是对dio的封装
error_handle 文件是异常处理
http_utils 项目接口请求管理类 ,（最终是通过调用这个文件进行网络请求）
log_utils 日志打印的一个第三方，可加可不加

ps: 暂时没有加拦截器

调用

import 'package:jh_flutter_demo/http/http_utils.dart';HttpUtils.PostRequest(APIType.Login,{"userName": _name, "pwd": _pwd}, success: (data) {}, fail: (code) {});

apis

class APIs {//url 前缀static const String apiPrefix =
"https://www.fastmock.site/mock/1010b262a743f0b06c565c7a31ee9739/root";//登录接口static String login = "/login";
}//接口类型,依次往下加
enum APIType {Login,GetPage,
}
//使用：APITypeValues[APIType.Login]
const APITypeValues = {APIType.Login: "/login",APIType.GetPage: "/getPageArrDic"
};

dio_utils

import 'dart:convert';import 'package:dio/dio.dart';
import 'package:connectivity/connectivity.dart';import 'apis.dart';
import 'log_utils.dart';
import 'error_handle.dart';const int _connectTimeout = 15000; //15s
const int _receiveTimeout = 15000;
const int _sendTimeout = 10000;typedef Success<T> = Function(T data);
typedef Fail = Function(int code, String msg);
class DioUtils {// default optionsstatic const String TOKEN = '';static Dio _dio;// 创建 dio 实例对象static Dio createInstance() {if (_dio == null) {/// 全局属性：请求前缀、连接超时时间、响应超时时间var options = BaseOptions(/// 请求的Content-Type，默认值是"application/json; charset=utf-8"./// 如果您想以"application/x-www-form-urlencoded"格式编码请求数据,/// 可以设置此选项为 `Headers.formUrlEncodedContentType`,  这样[Dio]就会自动编码请求体.
//        contentType: Headers.formUrlEncodedContentType, // 适用于post form表单提交responseType: ResponseType.json,validateStatus: (status) {// 不使用http状态码判断状态，使用AdapterInterceptor来处理（适用于标准REST风格）return true;},baseUrl: APIs.apiPrefix,
//        headers: httpHeaders,connectTimeout: _connectTimeout,receiveTimeout: _receiveTimeout,sendTimeout: _sendTimeout,);_dio = new Dio(options);}return _dio;}// 清空 dio 对象static clear() {_dio = null;}// 请求，返回参数为 T// method：请求方法，Method.POST等// path：请求地址// params：请求参数// success：请求成功回调// error：请求失败回调static Future request<T>(Method method, String path, dynamic params,{Success success, Fail fail}) async {try {//没有网络var connectivityResult = await (new Connectivity().checkConnectivity());if (connectivityResult == ConnectivityResult.none) {_onError(ExceptionHandle.net_error, '网络异常，请检查你的网络！', fail);return;}Dio _dio = createInstance();Response response = await _dio.request(path,data: params, options: Options(method: MethodValues[method]));if (response != null) {if (success != null) {success(response.data);}} else {_onError(ExceptionHandle.unknown_error, '未知错误', fail);}} on DioError catch (e) {
//      LogUtils.print_('请求出错：' + e.toString());final NetError netError = ExceptionHandle.handleException(e);_onError(netError.code, netError.msg, fail);}}
}/// 自定义Header
Map<String, dynamic> httpHeaders = {'Accept': 'application/json,*/*','Content-Type': 'application/json','token': DioUtils.TOKEN
};void _onError(int code, String msg, Fail fail) {if (code == null) {code = ExceptionHandle.unknown_error;msg = '未知异常';}LogUtils.print_('接口请求异常： code: $code, msg: $msg');if (fail != null) {fail(code, msg);}
}Map<String, dynamic> parseData(String data) {return json.decode(data) as Map<String, dynamic>;
}enum Method { GET, POST, DELETE, PUT, PATCH, HEAD }
//使用：MethodValues[Method.POST]
const MethodValues = {Method.GET: "get",Method.POST: "post",Method.DELETE: "delete",Method.PUT: "put",Method.PATCH: "patch",Method.HEAD: "head",
};

error_handle

import 'dart:io';import 'package:dio/dio.dart';class ExceptionHandle {static const int success = 200;static const int success_not_content = 204;static const int unauthorized = 401;static const int forbidden = 403;static const int not_found = 404;static const int net_error = 1000;static const int parse_error = 1001;static const int socket_error = 1002;static const int http_error = 1003;static const int timeout_error = 1004;static const int cancel_error = 1005;static const int unknown_error = 9999;static NetError handleException(DioError error) {if (error is DioError) {if (error.type == DioErrorType.DEFAULT ||error.type == DioErrorType.RESPONSE) {dynamic e = error.error;if (e is SocketException) {return NetError(socket_error, '网络异常，请检查你的网络！');}if (e is HttpException) {return NetError(http_error, '服务器异常！');}if (e is FormatException) {return NetError(parse_error, '数据解析错误！');}return NetError(net_error, '网络异常，请检查你的网络！');} else if (error.type == DioErrorType.CONNECT_TIMEOUT ||error.type == DioErrorType.SEND_TIMEOUT ||error.type == DioErrorType.RECEIVE_TIMEOUT) {//  连接超时 || 请求超时 || 响应超时return NetError(timeout_error, '连接超时！');} else if (error.type == DioErrorType.CANCEL) {return NetError(cancel_error, '取消请求');} else {return NetError(unknown_error, '未知异常');}} else {return NetError(unknown_error, '未知异常');}}}class NetError {int code;String msg;NetError(this.code, this.msg);
}

http_utils

import 'package:jh_flutter_demo/jh_common/widgets/jh_progress_hud.dart';import 'apis.dart';
import 'dio_utils.dart';
import 'log_utils.dart';typedef Success<T> = Function(T data);
typedef Fail = Function(int code);class HttpUtils {//登录static void login<T>(parameters, {Success success,Fail fail,}) {
//    DioUtils.request(Method.POST, APIs.login, parameters,
//        success: success, fail: fail);post(APIs.login, parameters, success: success, fail: fail);}//分页加载数据static void getNewPageList<T>(parameters, {Success success,Fail fail,}) {post(APIs.getPage, parameters, success: success, fail: fail);}//GETstatic void GetRequest<T>(APIType apiType,parameters, {Success success,Fail fail,}) {post(APITypeValues[apiType], parameters, success: success, fail: fail);}//POSTstatic void PostRequest<T>(APIType apiType,parameters, {Success success,Fail fail,}) {post(APITypeValues[apiType], parameters, success: success, fail: fail);}/********************************* 分割线 ********************************///get 请求static void get<T>(String url,parameters, {Success success,Fail fail,}) {_request(Method.GET, url, parameters, success: success, fail: fail);}//post 请求static void post<T>(String url,parameters, {Success success,Fail fail,}) {_request(Method.POST, url, parameters, success: success, fail: fail);}//_request 请求static void _request<T>(Method method,String url,parameters, {Success success,Fail fail,}) {/// restful 请求处理/// /base/search/hist/:user_id        user_id=27/// 最终生成 url 为     /base/search/hist/27parameters.forEach((key, value) {if (url.indexOf(key) != -1) {url = url.replaceAll(':$key', value.toString());}});
//    //参数处理
//    LogUtils.d("--------- parameters ---------");
//    LogUtils.d("$parameters");DioUtils.request(method, url, parameters, success: (result) {
//      LogUtils.d("--------- response ---------");
//      LogUtils.d('$result');
//      LogUtils.print_(result);if (result['code'] == 200) {if (success != null) {success(result);}} else {//其他状态，弹出错误提示信息JhProgressHUD.showText(result['msg']);}}, fail: (code, msg) {JhProgressHUD.showError(msg);if (fail != null) {fail(code);}});}
}

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Flutter - dio 简单二次封装

demo 地址: https://github.com/iotjin/jh_flutter_demo

结构

调用

apis

dio_utils

error_handle

http_utils

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