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我是Express和服务器端的一般新用户,对于我的小型反应消息应用程序,我使用Express作为后端(一个json文件)和webpack dev前端服务器。 如果我只是开始Webpack服务器,应用程序显示正确,probelems来,当我尝试使这两个工作在一起,我认为问题是webpack-dev-server的代理配置。Express,webpack-dev-sever找不到React index
这里是我的Express服务器,JSON-API server.js:
var express = require('express');
var serveStatic = require('serve-static');
var fs = require('fs');
var path = require('path');
var bodyParser = require('body-parser');
module.exports = (PORT) => {
const MESSAGES_FILE = path.join(__dirname, 'src/app/data/messages.json');
const app = express();
app.use(serveStatic(__dirname + '/build'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended: true}));
// Additional middleware which will set headers that we need on each request.
app.use(function(req, res, next) {
// Set permissive CORS header - this allows this server to be used only as
// an API server in conjunction with something like webpack-dev-server.
res.setHeader('Access-Control-Allow-Origin', '*');
// Disable caching so we'll always get the latest comments.
res.setHeader('Cache-Control', 'no-cache');
next();
});
app.get('/messages', function(req, res) {
fs.readFile(MESSAGES_FILE, function(err, data) {
if (err) {
console.error(err);
process.exit(1);
}
res.json(JSON.parse(data));
});
});
app.post('/messages', function(req, res) {
fs.readFile(MESSAGES_FILE, function(err, data) {
if (err) {
console.error(err);
process.exit(1);
}
var messages = JSON.parse(data);
var newMessage = {
id: Date.now(),
body: req.body.body,
date: req.body.date,
from: req.body.from,
to: req.body.to
};
messages.push(newMessage);
fs.writeFile(MESSAGES_FILE, JSON.stringify(messages, null, 4), function(err) {
if (err) {
console.error(err);
process.exit(1);
}
res.json(messages);
});
});
});
app.listen(PORT, function (err) {
if (err) {
return console.log(err);
}
console.log('Listening at' + PORT);
});
}
这是的WebPack-server.js:
var webpack = require('webpack');
var WebpackDevServer = require('webpack-dev-server');
var config = require('./webpack.config');
module.exports = (PORT) => {
const backendPort = PORT - 1;
const server = new WebpackDevServer(webpack(config), {
publicPath: config.output.publicPath,
hot: true,
historyApiFallback: true,
proxy: {
'*' : {
target: 'http://localhost:' + backendPort
}
}
});
server.listen(PORT, 'localhost', function (err) {
if (err) {
return console.log(err);
}
console.log('Listening at ' + PORT);
});
}
这里是server.js:
var apiServer = require('./json-api-server');
var webpackServer = require('./webpack-server');
const PORT = process.env.PORT || 4001;
const PROD = process.env.NODE_ENV === 'production';
if (PROD) {
apiServer(PORT);
} else {
apiServer(PORT - 1);
webpackServer(PORT);
}
我的文件树看起来像:
---/
----- server.js
----- webpack-server.js
----- json-api-server.js
----- src/
------- app/index.js
------- app/data/
-------------- messages.json
两台服务器都正确启动,并且它们在终端中不会出现任何错误 我可以到达localhost:4000/messages 我无法到达localhost:4001。我得到了:“不能得到/”
任何帮助吗? :)