使用示例

requestHttp

import http from '@ohos.net.http';
// import console from '../utils/console';

const TAG="[HttpService]"

export class HttpService{

  /**
   * HttpRequest对象，承担了发起/取消、订阅响应事件的职责
   */
  private httpClient:http.HttpRequest | undefined = undefined;
  public response:http.HttpResponse | undefined = undefined;

  constructor(){
    this.createHttpRequest();
    this.onHeaderReceive();
  }

  /**
   * 创建HttpRequest对象，并赋值给httpClient
   */
  private  createHttpRequest(){
    console.info(TAG,"start create HttpRequest");
    this.httpClient=http.createHttp();
    console.info(TAG,"create HttpRequest sucess ");
  }


  /**
   * 销毁http连接，中断数据请求
   */
  public destroy(){
    if (this.httpClient != null) {
      // 取消订阅HTTP响应头事件
      this.httpClient.off('headersReceive');
      // 取消订阅HTTP流式响应数据接收事件
      this.httpClient.off('dataReceive');
      this.httpClient.destroy();
      console.info(TAG, "HttpRequest destroyed")
    }
  }

  /**
   * 用于订阅http响应头，此接口会比request请求先返回。可以根据业务需要订阅此消息
   * 从API 8开始，使用on('headersReceive', Callback)替代on('headerReceive', AsyncCallback)
   */
  private onHeaderReceive(){
    if (this.httpClient != null){
      this.httpClient.on("headersReceive",(data)=>{
        console.info(TAG,"ResponseHeader:"+JSON.stringify(data));
      })
    }
  }


  /**
   * 根据url和请求参数，向服务端发送http请求
   * @param url
   * @param param
   */
  public requestHttp(url:string,param:RequestParam): Promise<http.HttpResponse>{
    console.info(TAG,"start request:"+JSON.stringify(param));
    let requestOption : http.HttpRequestOptions = {
      method: http.RequestMethod.POST, //请求方式POST GET
      extraData: param.extraData, //body参数
      header: param.header, //header
      readTimeout: param.readTimeout,
      connectTimeout: param.connectTimeout
    }
    console.info(TAG, "the request param is:" + JSON.stringify(requestOption));
    console.info(TAG, "the url is:" + url);
    if (this.httpClient != null) {
      return this.httpClient.request(url,requestOption);
    }else {
      return http.createHttp().request(url,requestOption);
    }
  }

  public requestHttpWithOption(url:string, requestOption:http.HttpRequestOptions):Promise<http.HttpResponse> {
    console.info(TAG, "start request:" + JSON.stringify(requestOption));
    if (this.httpClient == null) {
      return http.createHttp().request(url, requestOption);
    } else {
      return this.httpClient.request(url, requestOption);
    }
  }
}

/**
 * 请求参数接口
 */
export interface RequestParam {

  method: string;

  extraData?: string | Object | ArrayBuffer;

  header?: Object; // default is 'content-type': 'application/json'

  readTimeout?: number; // default is 60s

  connectTimeout?: number; // default is 60s.
}

let httpService:HttpService=new HttpService();
export default httpService

requestInStream

// 引入包名
import http from '@ohos.net.http';
import { BusinessError } from '@ohos.base';
import { RequestParam } from '../HttpService'
import { util } from '@kit.ArkTS';
import { resultFormat } from '../UiConstants';

const TAG="[HttpStreamService]"

export class HttpStreamService {
  /**
   * HttpRequest对象，承担了发起/取消、订阅响应事件的职责
   */
  private httpClient:http.HttpRequest | undefined = undefined;

  constructor(){
    this.httpClient = http.createHttp();
    this.onHeadersReceive();
    this.onDataReceiveProgress();
  }

  // 用于订阅HTTP响应头事件
  private onHeadersReceive(){
    if (this.httpClient == null) {
      return;
    }
    this.httpClient.on('headersReceive', (header: Object) => {
      console.info(TAG, 'header: ' + JSON.stringify(header));
    });
  }

  // 用于订阅HTTP流式响应数据接收事件
  public onDataReceive(callback: (result: string) => void){
    if (this.httpClient == null) {
      return;
    }
    this.httpClient.on('dataReceive', (data: ArrayBuffer) => {
      console.info(TAG, 'res length: ' + data.byteLength);
      const decoder = util.TextDecoder.create(`"utf-8"`);
      const str = decoder.decodeWithStream(new Uint8Array(data));
      console.info(TAG, "str: " + str);
      let resultStr = this.parseStreamResult(str);
      callback(resultStr);
    });
  }

  private parseStreamResult(str: string) : string {
    let resultArr: Array<string> = str.split('\n');
    console.info(TAG, "resultArr is " + resultArr);
    console.info(TAG, "resultArr is " + resultArr[3]);
    if (resultArr[3] == null) {
      return "";
    }
    let result: resultFormat = JSON.parse(resultArr[3].slice(5));
    let resultStr = result.output.choices[0].message.content
    return resultStr;
  }

  // 用于订阅HTTP流式响应数据接收进度事件
  private onDataReceiveProgress() {
    if (this.httpClient == null) {
      return;
    }
    this.httpClient.on('dataReceiveProgress', (data: Data) => {
      console.log(TAG, "dataReceiveProgress receiveSize:" + data.receiveSize + ", totalSize:" + data.totalSize);
    });
  }

  // 用于订阅HTTP流式响应数据接收完毕事件
  private onDataEnd() {
    if (this.httpClient == null) {
      return;
    }
    this.httpClient.on('dataEnd', () => {
      console.info(TAG, 'No more data in response, data receive end');
    });
  }

  public destroy() {
    if (this.httpClient == null) {
      return;
    }
    // 取消订阅HTTP响应头事件
    this.httpClient.off('headersReceive');
    // 取消订阅HTTP流式响应数据接收事件
    this.httpClient.off('dataReceive');
    // 取消订阅HTTP流式响应数据接收进度事件
    this.httpClient.off('dataReceiveProgress');
    // 取消订阅HTTP流式响应数据接收完毕事件
    this.httpClient.off('dataEnd');
    // 当该请求使用完毕时，调用destroy方法主动销毁
    this.httpClient.destroy();
  }

  async requestHttp(url:string, requestOption:http.HttpRequestOptions):Promise<number> {
    console.info(TAG,"start request:"+JSON.stringify(requestOption));
    if (this.httpClient == null) {
      return http.createHttp().requestInStream(url,requestOption);
    } else {
      return this.httpClient.requestInStream(url,requestOption);
    }
  }
}

// 用于订阅HTTP流式响应数据接收进度事件
class Data {
  receiveSize: number = 0;
  totalSize: number = 0;
}

let httpStreamService:HttpStreamService=new HttpStreamService();
export default httpStreamService

通义千问

import httpStreamService from './HttpStreamService';
import httpService, { RequestParam } from './HttpService';
import http from '@ohos.net.http';

const TAG: string = "[TongYiThousandQHttp]"
const API_KEY = 'xxx';
const GENERATION_URL = "https://dashscope.aliyuncs.com/api/v1/services/aigc/text-generation/generation";

export class TongYiThousandQHttp {
  public static openSEE:boolean = true
  private prompt: string = ''
  private result: string = ''
  private requestOptions: http.HttpRequestOptions = {}

  constructor(prompt: string) {
    this.prompt = prompt
  }

  InitParam() {
    this.requestOptions = {
      method: http.RequestMethod.POST,
      header: {
        "Content-Type": 'application/json',
        Authorization: `Bearer ${API_KEY}`,
        'X-DashScope-SSE': 'enable'
      },
      extraData: {
        model: 'qwen-turbo',
        input: {
          messages: [{ 'role': 'system', 'content': 'You are a helpful assistant.' },
            { 'role': 'user', 'content': this.prompt }]
        },
        parameters: {
          result_format: "message"
        }
      }
    }
  }

  getHttpResult(callback: (result: string, time: number) => void) {
    let time1: Date = new Date();
    this.InitParam()
    httpService.requestHttpWithOption(GENERATION_URL, this.requestOptions).then((data: http.HttpResponse) => {
      console.info(TAG, "send request sucess,the response is:" + JSON.stringify(data));
      let time2: Date = new Date();
      let costTime = time2.getTime() - time1.getTime();
      if (data.responseCode != 200 || data.responseCode == null) {
        this.result = '获取结果失败，请重试'
      } else {
        this.result = data.result as string
      }
      callback(this.result, costTime)
    }).catch((err:Error) => {
      console.info(TAG, 'error:' + JSON.stringify(err));
    });
  }

  getHttpStreamResult(callback: (result: string) => void) {
    this.InitParam();
    httpStreamService.onDataReceive(callback);
    httpStreamService.requestHttp(GENERATION_URL, this.requestOptions).then((data: number) => {
      console.info(TAG, "requestInStream OK!" + JSON.stringify(data));
    }).catch((err: Error) => {
      console.info(TAG, "requestInStream ERROR : err = " + JSON.stringify(err));
    });
  }
}

相关链接

http的doc文档说明
通义千问API