node的服务端对接科大讯飞-火星ai解决方案

序：

官方给的node对接火星的demo其实只适用于node开发的web应用，但是对于纯node 作为服务端，也就是作为webapi来调用，你会发现，location.host直接是获取不到location的。这个时候，其实要单独起个wss的服务的，关于这点，雪狼写了本篇教程，

1、博主的node：v18.12.1

2、ws：v8.14.1（WebSocket）

3、CryptoJS：4.0.0

正文：

1.、来首先我们安装依赖，下面两个命令

cnpm install crypto-js@4.0.0 -S

cnpm install ws@8.14.1 -S

2、引入

import WebSocket from "ws";
import CryptoJS from 'crypto-js'

3、写初始化url

function getWebsocketUrl(){return new Promise((resolve, reject) => {var apiKey = "你的apiKey"var apiSecret = "你的apiSecret"var url = 'wss://spark-api.xf-yun.com/v1.1/chat'var host = "localhost:8001"var date = new Date().toGMTString()var algorithm = 'hmac-sha256'var headers = 'host date request-line'var signatureOrigin = `host: ${host}\ndate: ${date}\nGET /v1.1/chat HTTP/1.1`var signatureSha = CryptoJS.HmacSHA256(signatureOrigin, apiSecret)var signature = CryptoJS.enc.Base64.stringify(signatureSha)var authorizationOrigin = `api_key="${apiKey}", algorithm="${algorithm}", headers="${headers}", signature="${signature}"`var authorization = btoa(authorizationOrigin)url = `${url}?authorization=${authorization}&date=${date}&host=${host}`resolve(url)})}

注意，这里localhost:8001你直接写8001!，后续你调试直接监听这个端口接口

4、开始监听

function wsFun(userSay,callback){getWebsocketUrl().then(url => {let ws = new WebSocket(url);ws.on('error', console.error);ws.on('open', function open() {var params = {"header": {"app_id":"你的app_id",//这里记得替换app_id"uid": "fd3f47e4-d"},"parameter": {"chat": {"domain": "general","temperature": 0.5,"max_tokens": 1024}},"payload": {"message": {"text": [{"role": "user","content": userSay}]}}}ws.send(JSON.stringify(params))});ws.on('close', function close() {});ws.on('message', function message(data) {var msgData=JSON.parse(data)if (msgData.header.code !== 0) {callback("提问失败",2)}else{callback(msgData.payload.choices.text[0].content,msgData.header.status)// 这个就是返回啦}});})}
wsFun("你好啊");

5、断点运行代码