来自服务器的响应在客户端未定义,但在服务器端未定义

时间:2020-06-01 05:46:27

标签: javascript express spotify-app

我正在尝试构建一个Spotify Web应用程序。当我在Albums.js中发出get请求时,server.js文件中的data.body.items显示正确的数据,但是当我在Albums.js中使用console.log()打印其响应时,它是未定义的。 我想使用响应中的数据。我该如何解决该问题?

Albums.js

import React from "react";
import { useParams } from "react-router-dom";
import axios from "axios";
import AlbumCard from "./AlbumCard";

const Albums = () => {
  const { id } = useParams();

  const handleClick = () => {
    axios
      .get(`http://localhost:4000/albums/${encodeURIComponent(id)}`, {
        params: {
          id: id,
        },
      })
      .then((res) => {
        console.log(`Returned album data from the server: ${res}`);
        return res.data;
      })
      .catch((err) => console.log(err));
  };

  return (
    <>
      <div className="container" style={{ color: "white" }}>
        {`${id}'s albums`}
  {console.log(handleClick())}
      </div>
    </>
  );
};

export default Albums;

server.js

const express = require("express");
const SpotifyWebApi = require("spotify-web-api-node");
const bodyParser = require("body-parser");
const cors = require("cors");
const app = express();
const port = 4000 || process.env.PORT;

require("dotenv").config();

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

// Create the api object with the credentials
var spotifyApi = new SpotifyWebApi({
  clientId: process.env.CLIENT_ID,
  clientSecret: process.env.CLIENT_SECRET,
});

// Retrieve an access token.
spotifyApi.clientCredentialsGrant().then(
  function (data) {
    console.log("The access token expires in " + data.body["expires_in"]);

    // Save the access token so that it's used in future calls
    spotifyApi.setAccessToken(data.body["access_token"]);
  },
  function (err) {
    console.log("Something went wrong when retrieving an access token", err);
  }
);

app.post("/search_result", (req, res) => {
  spotifyApi
    .searchArtists(req.body.keyword)
    .then(function (data) {
      let search_res = data.body.artists.items;
      res.json(search_res);
      res.end();
    })
    .catch((err) => {
      console.log(err);
      res.status(500).send(err);
    });
});

app.get("/albums/:id", (req, res) => {
  console.log(req.params.id);
  spotifyApi.getArtistAlbums(req.params.id).then(function (data) {
    console.log(data.body.items);
    res.json(data.body.items);
    res.end();
  });
});

app.listen(port, () => console.log(`It's running on port ${port}`));

0 个答案:

没有答案