[英]Network error from using localhost when web app is launched with Netlify
我剛剛使用 Netlify 部署了一個 Spotify web 應用程序。 它在我的計算機上運行時工作正常,但在其他計算機上不起作用。 它顯示網絡錯誤,POST http://localhost:4000/search_result net::ERR_CONNECTION_REFUSED。 我將 axios 請求的 url 更改為“/search_result”,但它仍然不起作用。 我應該如何修復它?
這是我的代碼。
主.js
import React, { Component } from "react";
import SingerBox from "./SingerBox";
import axios from "axios";
import "../../App.css";
export class Main extends Component {
constructor(props) {
super(props);
this.state = {
keyword: "",
artists: [],
};
this.handleChange = this.handleChange.bind(this);
this.handleSubmit = this.handleSubmit.bind(this);
}
handleChange(e) {
this.setState({ keyword: e.target.value });
}
handleSubmit(e) {
e.preventDefault();
if (this.state.keyword === "") {
alert("Enter Search Keyword");
}
axios
.post(
"/search_result",
{
keyword: this.state.keyword,
},
{
headers: {
"Content-Type": "application/json",
"Access-Control-Allow-Origin": "*",
},
}
)
.then((res) => {
this.setState({ artists: res.data });
})
.catch((err) => {
console.log(err);
});
}
render() {
return (
<div className="container">
<div className="main">
<form onSubmit={this.handleSubmit}>
<label className="header" htmlFor="search">
Explore New Artists
</label>
<span>
<input
className="search-box"
type="search"
value={this.state.keyword}
onChange={this.handleChange}
name="keyword"
placeholder="Search artists..."
/>
<button className="submit-btn" type="submit" value="Submit">
Search
</button>
</span>
</form>
<br />
{this.state.artists.map((elem) => (
<SingerBox images={elem.images} name={elem.name} id={elem.id} />
))}
<br />
</div>
</div>
);
}
}
export default Main;
服務器.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.
function newToken() {
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);
}
);
}
newToken();
tokenRefreshInterval = setInterval(newToken, 1000 * 60 * 60);
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, { limit: 40 })
.then(function (data) {
res.json(data.body.items);
res.end();
});
});
app.get("/albums/tracks/:albumID", (req, res) => {
console.log(req.params.albumID);
spotifyApi
.getAlbumTracks(req.params.albumID, { limit: 20 })
.then(function (data) {
console.log(data.body);
res.json(data.body.items);
res.end();
});
});
app.listen(port, () => console.log(`It's running on port ${port}`));
服務器代碼很可能沒有按照您的預期運行。 想想你運行了哪些命令來讓localhost
服務器在你的機器上運行,與你在 Netlify 中提供的build
命令相比,以構建你的站點。
Netlify 主要用於托管 static 站點,因此不會自動提供后端服務器供您使用。
您可以將應用程序的服務器部分托管在 Heroku 之類的東西上(然后必須將該服務器實例的 URL 硬編碼到您的應用程序中),或者您可以使用 Netlify 函數來處理您的基本post
請求,這將讓您使用您的問題中的相對 URL。
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