wzf-cz-web/server.js

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

const app = express();
const port = 5500;

const requestHost = 'http://192.168.1.12:9001'

app.use('/js', express.static(path.join(__dirname, 'js')));
app.use('/css', express.static(path.join(__dirname, 'css')));
app.use('/img', express.static(path.join(__dirname, 'img')));
app.use('/index.html', express.static(path.join(__dirname, 'index.html')));

app.use(bodyParser.json())

// 允许跨域
app.all('*', function (req, res, next) {
  res.header("Access-Control-Allow-Origin", '*');
  res.header("Access-Control-Allow-Headers", "Content-Type,Content-Length, Authorization, Accept,X-Requested-With");
  res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS");
  res.header("Access-Control-Allow-Credentials", "true");
  if (req.method === "OPTIONS") res.send(200);
  else next();
});

// 处理 GET 请求
app.get('*', (req, res) => {
  const options = {
    url: requestHost + req.path,
    method: "GET",
  };
  request(options, function (error, response, body) {
    if (!error && response.statusCode === 200) {
      let headers = response.headers;
      res.setHeader('content-type', headers['content-type']);
      res.send(body);
    } else {
      res.send(options);
    }
  });
});

// 处理 POST 请求
app.post('*', (req, res) => {
  const options = {
    url: requestHost + req.path,
    method: 'POST',
    json: req.body,
    headers: {
      'content-type': req.headers['content-type']
    }
  };
  request(options, function (error, response, body) {
    if (!error) {
      let headers = response.headers;
      res.setHeader('content-type', headers['content-type']);
      res.send(body);
    } else {
      res.send(options);
    }
  });
});

app.listen(port, () => {
  console.log(`Example app listening at http://localhost:${port}`);
});