fltter 网络请求体格式化

json 格式化代码

format(String jsonStr) {
    String tab = "  ";
    print('{');
    int start = 1;
    for (int i = 1; i < jsonStr.length; i++) {
      if (jsonStr[i] == ',') {
        print("$tab${jsonStr.substring(start, i + 1)}");
        start = i + 1;
      } else if (jsonStr[i] == '[' || jsonStr[i] == '{') {
        print("$tab${jsonStr.substring(start, i + 1)}");
        start = i + 1;
        tab += "  ";
      } else if (jsonStr[i] == "}" || jsonStr[i] == "]") {
          if (i + 1 < jsonStr.length && jsonStr[i + 1] == ',') {
            print("$tab${jsonStr.substring(start, i + 2)}");
            i++;
          } else
            print("$tab${jsonStr.substring(start, i + 1)}");
        tab = tab.substring(0, tab.length - 2);
        start = i + 1;
      }
    }
  }

完整的拦截器类

import 'package:dio/dio.dart';
import 'package:flutter_http/config/config.dart';

/// Log 拦截器
/// Created by guoshuyu
/// on 2019/3/23.
class LogsInterceptors extends InterceptorsWrapper {
  @override
  onRequest(RequestOptions options) {
    if (Config.DEBUG) {
      print("请求url：${options.path}");
      if (options.data != null) {
        print('请求参数: ' + options.data.toString());
      }
    }
    return options;
  }

  @override
  onResponse(Response response) {
    if (Config.DEBUG) {
      if (response != null) {
        print('返回参数:');
        format(response.toString());
      }
    }
    return response; // continue
  }

  @override
  onError(DioError err) {
    if (Config.DEBUG) {
      print('请求异常: ' + err.toString());
      print('请求异常信息: ' + err.response?.toString() ?? "");
    }
    return err;
  }

 format(String jsonStr) {
    String tab = "  ";
    print('{');
    int start = 1;
    for (int i = 1; i < jsonStr.length; i++) {
      if (jsonStr[i] == ',') {
        print("$tab${jsonStr.substring(start, i + 1)}");
        start = i + 1;
      } else if (jsonStr[i] == '[' || jsonStr[i] == '{') {
        print("$tab${jsonStr.substring(start, i + 1)}");
        start = i + 1;
        tab += "  ";
      } else if (jsonStr[i] == "}" || jsonStr[i] == "]") {
          if (i + 1 < jsonStr.length && jsonStr[i + 1] == ',') {
            print("$tab${jsonStr.substring(start, i + 2)}");
            i++;
          } else
            print("$tab${jsonStr.substring(start, i + 1)}");
        tab = tab.substring(0, tab.length - 2);
        start = i + 1;
      }
    }
  }

dio 添加拦截器

Dio _dio = Dio();
_dio.interceptors.add(LogsInterceptors());