Node.js 无法从api获取

对于上述代码（未定义），值为send in

res.send（body.centers）

正文采用json格式，如下所示：

const express = require("express");
const bodyParser = require("body-parser");
const request = require("request");

const app = express();

app.use(bodyParser.urlencoded({extended : true}));

app.listen(3000,function(){
    console.log("server is running");
})

app.get("/",function(req,res){
    res.sendFile(__dirname + "/index.html");
})

app.post("/",function(req,res){
    var url = "https://cdn-api.co-vin.in/api/v2/appointment/sessions/public/calendarByPin?";
    var pincode = req.body.pinCode;
    url = url + "pincode=" + pincode;
    var date = req.body.date;
    url = url + "&date=" + date;
    console.log(pincode,date);
    
    request(url,function(err,res1,body){
        res.send(body.centers);
    })
})

---

试着看看身体看起来怎么样

{"centers":[{"center_id":596215,"name":"MISSION UHC","address":"MISSION NADIAD","state_name":"Gujarat","district_name":"Kheda","block_name":"Nadiad","pincode":387002,"lat":22,"long":72,"from":"09:00:00","to":"18:00:00","fee_type":"Free"}

如果端子中的阀体输出带有双引号，如： { “键”：“值” } 这意味着主体是JSON字符串，您需要使用以下命令将其解析为对象：

request(url,function(err,res1,body) {
  console.log(body);
})

然后发送：

body = JSON.parse(body)

---

确切地说：body是JSON字符串还是JavaScript对象？我猜

body

是字符串而不是对象。尝试

body=JSON.parse（body）

res.send(body.centers)