app/lib/https/MyDio.dart

import 'dart:convert';
import 'dart:io';

import 'package:bbyyy/beans/simple_bean.dart';
import 'package:bbyyy/my_tools/easy_loading/easy_loading.dart';
import 'package:bbyyy/my_tools/event_bus.dart';
import 'package:bbyyy/my_tools/global.dart';
import 'package:bbyyy/my_tools/my_apis.dart';
import 'package:bbyyy/my_tools/my_cookie.dart';
import 'package:bbyyy/my_tools/my_tools.dart';
import 'package:bbyyy/my_tools/s.dart';
import 'package:bbyyy/paegs/root_page/root_page_view.dart';
import 'package:dio/dio.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:simple_logger/simple_logger.dart';

///http请求成功回调
typedef SCallBack<T> = void Function(Response response, bool hasError);

///失败回调
typedef FCallBack = void Function(DioError error);

final logger = SimpleLogger();

class MyDio {
  //私有构造函数
  MyDio._internal() {
    initDio();
  }

  //保存单例
  static MyDio _singleton = MyDio._internal();

  //工厂构造函数
  factory MyDio() => _singleton;

  Dio dio; // 使用默认配置
  BaseOptions options;

  initDio() {
    // 或者通过传递一个 `options`来创建dio实例

    options = BaseOptions(
      baseUrl: MyCookie().getServer(),
      connectTimeout: 15000,
      receiveTimeout: 5000,
    );
    if (MyCookie().loginInformation != null) {
      options.headers = {
        '${MyApis.getApi('token')}': MyCookie().getToken(),
        '${MyApis.getApi('user')}': MyCookie().getUser(),
        'Content-Type': 'application/json'
      };
    }
    dio = Dio(options);
  }

  cancelRequest(){
    dio.clear();
  }

  post(String url, data, SCallBack sCallBack, FCallBack fCallBack) async {
    logger.info(MyCookie().getServer() + url);
    try {
      logger.info(json.encode(data));
    } catch (e) {}
    try {
      Response re = await dio.post(url, data: data);
      print(dio.options.headers);
      logger.info(MyCookie().getServer() + url);
      try {
        logger.info(json.encode(data));
      } catch (e) {}
      logger.info(re.data);
      if (await checkingReturnParameter(re.data)) {
        sCallBack(re, false);
        // EasyLoading.dismiss();
      } else {
        sCallBack(re, true);
      }
    } on DioError catch (e) {
      switch (e.type) {
        case DioErrorType.cancel:
          fCallBack(e);
          EasyLoading.showToast('请求已取消');
          break;
        case DioErrorType.connectTimeout:
          fCallBack(e);
          EasyLoading.showToast('链接超时');
          if(!MyCookie().switching){
            changeServer();
          }
          break;
        case DioErrorType.other:
          fCallBack(e);
          EasyLoading.showToast('网络错误');
          if(!MyCookie().switching){
            changeServer();
          }
          break;
        case DioErrorType.receiveTimeout:
          fCallBack(e);
          EasyLoading.showToast('接受超时');
          break;
        case DioErrorType.response:
          fCallBack(e);
          EasyLoading.showToast('服务器异常');
          if(!MyCookie().switching){
            changeServer();
          }
          break;
        case DioErrorType.sendTimeout:
          fCallBack(e);
          EasyLoading.showToast('网络不佳');
          break;
        default:
          fCallBack(e);
          EasyLoading.showToast('网络出错');
          if(!MyCookie().switching){
            changeServer();
          }
      }
    }
  }

  get(String url, SCallBack sCallBack, FCallBack fCallBack) async {
    try {
      Response re = await dio.get(url);
      logger.info(MyCookie().getServer() + url);
      logger.info(re.data);
      if (await checkingReturnParameter(re.data)) {
        sCallBack(re, false);
        // EasyLoading.dismiss();
      } else {
        sCallBack(re, true);
      }
    } on DioError catch (e) {
      switch (e.type) {
        case DioErrorType.cancel:
          fCallBack(e);
          EasyLoading.showToast('请求已取消');
          break;
        case DioErrorType.connectTimeout:
          fCallBack(e);
          EasyLoading.showToast('您的网络不稳定，请稍后重试');
          break;
        case DioErrorType.other:
          fCallBack(e);
          EasyLoading.showToast('您的网络不稳定，请稍后重试');
          break;
        case DioErrorType.receiveTimeout:
          fCallBack(e);
          EasyLoading.showToast('您的网络不稳定，请稍后重试');
          break;
        case DioErrorType.response:
          fCallBack(e);
          EasyLoading.showToast('您的网络不稳定，请稍后重试');
          break;
        case DioErrorType.sendTimeout:
          fCallBack(e);
          EasyLoading.showToast('您的网络不稳定，请稍后重试');
          break;
        default:
          fCallBack(e);
          EasyLoading.showToast('您的网络不稳定，请稍后重试');
      }
    }
  }

  query(data, SCallBack sCallBack, FCallBack fCallBack) {
    post(MyApis.getApi('query'), data, sCallBack, fCallBack);
  }

  save(data, SCallBack sCallBack, FCallBack fCallBack) {
    post(MyApis.getApi('save'), data, sCallBack, fCallBack);
  }

  del(data, SCallBack sCallBack, FCallBack fCallBack) {
    post(MyApis.getApi('delete'), data, sCallBack, fCallBack);
  }

  update(data, SCallBack sCallBack, FCallBack fCallBack) {
    post(MyApis.getApi('update'), data, sCallBack, fCallBack);
  }

  updateM(data, SCallBack sCallBack, FCallBack fCallBack) {
    post(MyApis.getApi('updateM'), data, sCallBack, fCallBack);
  }

  loginUpload(File _image, String user, String token, SCallBack sCallBack,
      FCallBack fCallBack, BuildContext context) async {
    var s = '${MyApis.getApi('upload')}?token=$token&user=$user';
    logger.info(MyCookie().getServer() + s);
    var name = _image.path
        .substring(_image.path.lastIndexOf("/") + 1, _image.path.length);
    print(name);
    FormData formData = new FormData.fromMap({
      '${MyApis.getApi('files')}': await MultipartFile.fromFile(
        _image.path,
        filename: name,
      ),
    });
    post(s, formData, sCallBack, fCallBack);
  }

  upload(File _image, SCallBack sCallBack, FCallBack fCallBack,
      BuildContext context) async {
    var s = '${MyApis.getApi('upload')}?${MyCookie().getUT()}';
    logger.info(MyCookie().getServer() + s);
    var name = _image.path
        .substring(_image.path.lastIndexOf("/") + 1, _image.path.length);
    print(name);
    FormData formData = new FormData.fromMap({
      '${MyApis.getApi('files')}': await MultipartFile.fromFile(
        _image.path,
        filename: name,
      ),
    });
    post(s, formData, sCallBack, fCallBack);
  }

  loginUpdate(data, String user, String token, SCallBack sCallBack,
      FCallBack fCallBack, BuildContext context) {
    String s = '/rdm/update?token=$token&user=$user';
    logger.info(MyCookie().getServer() + s);
    post(s, data, sCallBack, fCallBack);
  }

  Future<bool> checkingReturnParameter(data) async {
    SimpleBean simpleBean;
    try {
      simpleBean = SimpleBean.fromJson(json.decode(data));
    } catch (e) {
      print(e);
    }
    if (simpleBean != null) {
      if (simpleBean.error == null || simpleBean.error.length == 0) {
        return true;
      } else {
        EasyLoading.showToast(simpleBean.error);
        if (simpleBean.error.contains('token') ||
            simpleBean.error.contains('会话过期，请重新登录') ||
            simpleBean.error.contains('登录失效，请重新登录')) {
          MyCookie().clean();
          cancelRequest();
          RootPageView().bNIndex = 0;
          navigatorKey.currentState.pushNamedAndRemoveUntil(
              '/loginPage', ModalRoute.withName("/loginPage"));
        }
        return false;
      }
    } else {
      return false;
    }
  }

  void changeServer() {
    MyCookie().switching = true;
    List<String> salt = MyCookie().getLoginInformation().data.extra.salt;
    print('salt.length=======${salt.toString()}');
    if(salt==null||salt.length==0){
      MyCookie().prefs.setString('using', '');
    }else{
      w:
      for (int i = 0; i < salt.length; i++) {
        if (MyCookie().prefs.getString('using') == null ||
            MyCookie().prefs.getString('using').isEmpty ||
            MyCookie().prefs.getString('using') == '') {
          MyCookie().prefs.setString('using', salt[i]);
          break w;
        } else if (!MyCookie().prefs.getString('using').contains(salt[i])) {
          MyCookie().prefs.setString(
              'using', '${MyCookie().prefs.getString('using')},${salt[i]}');
          break w;
        }
        if (i == salt.length - 1 &&
            MyCookie().prefs.getString('using').contains(salt[i])) {
          MyCookie().prefs.setString('using', '');
        }
      }
    }
    if(MyCookie().prefs.getString('using')==''){
      MyCookie().prefs.setString('timestamp', '');
      MyCookie().prefs.setString('uid', '');
      MyCookie().prefs.setString('serverID', '');
      EventBus().emit('服务器异常，请稍后再试');
      MyCookie().switching = false;
    }else{
      MyCookie().prefs.setString(
          'timestamp', MyCookie().getLoginInformation().data.extra.timestamp);
      MyCookie().prefs.setString(
          'uid', MyCookie().getLoginInformation().data.extra.uid.toString());
      s().encryption();
      RootPageView().bNIndex = 0;
      cancelRequest();
      MyCookie().reNum++;
      MyCookie().switching = false;
      navigatorKey.currentState.pushNamedAndRemoveUntil(
          '/loginPage', ModalRoute.withName("/loginPage"));
    }
  }
}