#鸿蒙通关秘籍#如何在HarmonyOS Next中封装http请求

在HarmonyOS Next中，通过Promise异步回调方式封装http请求，可以使用以下步骤完成：

1. 创建resultVO接口，定义后端返回数据的格式。

export default interface resultVO<T>{
  code: number
  msg: string
  data: T
}

2. 创建requestParams接口，用于定义http请求的参数。

import { http } from '@kit.NetworkKit'

export interface requestParams{
  url: string
  method?: http.RequestMethod
  extraData?: object
}

3. 实现请求方法，发送http请求并返回一个Promise对象。

import { http } from '@kit.NetworkKit'
import resultVO from '../common/impl/resultVO'

export const request = async <T>(params: requestParams): Promise<resultVO<T>> => {
  const baseURL: string = 'http://192.168.31.160:8080';
  let httpRequest = http.createHttp();

  let requestUrl = baseURL + params.url;
  
  let options: http.HttpRequestOptions = {
    method: params.method ?? http.RequestMethod.GET,
    header: {
      'Content-Type': 'application/json',
      token: 'your-token-here'
    },
    extraData: params.extraData ?? undefined,
    expectDataType: http.HttpDataType.OBJECT
  }

  return new Promise(async (resolve, reject) => {
    httpRequest.request(
      requestUrl,
      options,
      (err, data) => {
        if (!err) {
          const res = data.result as resultVO<T>
          
          if(res.code == 1) {
            resolve(res)
          } else {
            console.error('Error:', res.msg)
          }
        } else {
          console.error('error:', JSON.stringify(err))
          reject(err)
        }

        httpRequest.destroy()
      }
    )
  })
}