flutter dio网络请求 get post 图片上传

素颜马尾好姑娘i 2023-10-06 23:57 51阅读 0赞

Dio下载地址github:[dio][]  
初始化网络请求

BaseOptions option = BaseOptions();
    //初始化cotentType
    option.contentType = ContentType.parse("application/json;charset=UTF-8");
    //设置请求头参数
    option.headers = {'token':'ab2343sdfsdfsfsdf1213123'};
    //创建Dio
    Dio dio = Dio(option);

发起get或者post请求  
get

/*get请求*/
      static Future<AjaxResult> get(String url, {Map params}) async {
        if (params != null && params.isNotEmpty) {
          // 如果参数不为空，则将参数拼接到URL后面
          StringBuffer sb = StringBuffer("?");
          params.forEach((key, value) {
            sb.write("$key" + "=" + "$value" + "&");
          });
          String paramStr = sb.toString();
          paramStr = paramStr.substring(0, paramStr.length - 1);
          url += paramStr;
        }
        print('url---> $url');
        Dio dio = getDio();
        try {
          Response res = await dio.get(url);
          // var re = Utf8Decoder().convert(res.data);
          final re = AjaxResult.fromJson(json.decode(res.data));
          return re;
        } on DioError catch (e) { 
          print(e);
          FuntionUtil.toast(e.message);
        }
      }

post请求

static Future<AjaxResult> post(String url, {Map<String,dynamic> params}) async {
        // final paramsjson = jsonEncode(params);
        print('url---> $url params--->$params');
        Dio dio = getDio();
        try {
          // var body = json.encode(paramsjson);
          Response res = await dio.post(url, queryParameters: params);
          print(res);
          final re = AjaxResult.fromJson(json.decode(res.data));
          return re;
          // var re = Utf8Decoder().convert(res.data);
        } on DioError catch (e) {
          print(e);
          FuntionUtil.toast(e.message);
        }
      }

图片上传

static Future<AjaxResult> upload(String url, File imgfile,
          {Map<String, String> params}) async {
        // final paramsjson = jsonEncode(params);
        String path = imgfile.path;
        var name = path.substring(path.lastIndexOf("/") + 1, path.length);
        FormData formData = new FormData.from({
          "Filedata": new UploadFileInfo(File(path), name),
          "size":"0",
          "majia":"zhaowojie",
          // 'Files[]': [new UploadFileInfo(File(path), "sa"),new UploadFileInfo(File(path), name)],
        });
    
        Dio dio = getDio();
        try {
          // var body = json.encode(paramsjson);
          Response res = await dio.post(url, data: formData);
          print(res);
          final re = AjaxResult.fromJson(json.decode(res.data));
          return re;
        } on DioError catch (e) {
          print(e);
          FuntionUtil.toast(e.message);
        }
      }

完整代码

import 'dart:async';
    import 'dart:convert';
    import 'dart:io';
    import 'package:dio/dio.dart';
    import 'package:flutte_xms/model/ajaxresult.dart';
    import 'package:flutte_xms/model/usermodel.dart';
    import 'package:flutte_xms/util/func_util.dart';
    import 'package:flutte_xms/util/usermanager.dart';
    
    class DioReq {
      /*get请求*/
      static Future<AjaxResult> get(String url, {Map params}) async {
        if (params != null && params.isNotEmpty) {
          // 如果参数不为空，则将参数拼接到URL后面
          StringBuffer sb = StringBuffer("?");
          params.forEach((key, value) {
            sb.write("$key" + "=" + "$value" + "&");
          });
          String paramStr = sb.toString();
          paramStr = paramStr.substring(0, paramStr.length - 1);
          url += paramStr;
        }
        print('url---> $url');
        Dio dio = getDio();
        try {
          Response res = await dio.get(url);
          // var re = Utf8Decoder().convert(res.data);
          final re = AjaxResult.fromJson(json.decode(res.data));
          return re;
        } on DioError catch (e) { 
          print(e);
          FuntionUtil.toast(e.message);
        }
      }
    
      /*post请求*/
      static Future<AjaxResult> post(String url, {Map params}) async {
        // final paramsjson = jsonEncode(params);
        print('url---> $url params--->$params');
        Dio dio = getDio();
        try {
          // var body = json.encode(paramsjson);
          Response res = await dio.post(url, data: params);
          print(res);
          final re = AjaxResult.fromJson(json.decode(res.data));
          return re;
          // var re = Utf8Decoder().convert(res.data);
        } on DioError catch (e) {
          print(e);
          FuntionUtil.toast(e.message);
        }
      }
    
      /*图片上传*/
      static Future<AjaxResult> upload(String url, File imgfile,
          {Map<String, String> params}) async {
        // final paramsjson = jsonEncode(params);
        String path = imgfile.path;
        var name = path.substring(path.lastIndexOf("/") + 1, path.length);
        FormData formData = new FormData.from({
          "Filedata": new UploadFileInfo(File(path), name),
          "size":"0",
          "majia":"zhaowojie",
          // 'Files[]': [new UploadFileInfo(File(path), "sa"),new UploadFileInfo(File(path), name)],
        });
    
        Dio dio = getDio();
        try {
          // var body = json.encode(paramsjson);
          Response res = await dio.post(url, data: formData);
          print(res);
          final re = AjaxResult.fromJson(json.decode(res.data));
          return re;
        } on DioError catch (e) {
          print(e);
          FuntionUtil.toast(e.message);
        }
      }
    
      static Dio getDio() {
        BaseOptions option = BaseOptions();
        option.contentType = ContentType.parse("application/json;charset=UTF-8");
        //如果用户登录成功 将token带上
        if (UserManager.shared.isLogin) {
          UserInfo info = UserManager.shared.userInfo;
          print('appLoginToken:${info.userId}');
          if (info != null) {
            option.headers = {
              'userId': info.userId,
            };
          }
        }
        return Dio(option);
      }
    }

关于AjaxResult Model

怎么使用 post get upload

DioReq.post(请求的url, params: {
          'mobile': phone,
          'authCodeType': 1,  
        }).then(
          (res) {
            if (res.status == AjaxResultStateSuccess){
              print('验证码发送成功');
            }else{
              FuntionUtil.toast(res.msg);
            }
          },
        );
        //图片上传
        DioReq.upload(请求的url, forgroundImg).then((res){
          if(res.status == AjaxResultStateSuccess){
              FuntionUtil.toast(res.msg);
              print(res);
          }else{
            FuntionUtil.toast(res.msg);
          }
        });

[dio]: https://github.com/flutterchina/dio