node.js輕鬆搭建一個伺服器
摘要：
前端獲取資料時經常遇見跨域問題，以前一直用nginx做反向代理。最近在用vuejs，發現webpack-dev-server的代理簡單好用。於是仿照寫了一個簡單的web伺服器，用於非webpack的專案。
1 const request = require('request...
前端獲取資料時經常遇見跨域問題，以前一直用nginx做反向代理。最近在用vuejs，發現webpack-dev-server的代理簡單好用。於是仿照寫了一個簡單的web伺服器，用於非webpack的專案。
1 const request = require('request');
2 const express = require('express');
3 const path = require('path');
4
5 const app = express();
6
7 const proxyTable = {
8'/wcf': {
9target: '
10}
11 };交流學習圈582735936
12
13 app.use(function(req, res,next) {
14const url = req.url;
15if (req.method == 'OPTIONS') {
16console.log('options_url: ', url);
17
18// res.header("Access-Control-Allow-Origin", req.headers.origin || '*');
19// res.header("Access-Control-Allow-Headers", "Content-Type, Authorization, X-Requested-With");
20// res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS");
21
22// res.header("Access-Control-Allow-Credentials", true);
23
24res.status(200).send('OK');
25return;
26}
27
28// console.log('req_url: ', url);
29next();
30 });
31
32 交流學習圈582735936
33 app.use(express.static(path.join(__dirname, 'static')));
34
35 app.use('/', function(req, res) {
36const url = req.url;
37const proxy = Object.keys(proxyTable);
38let not_found = true;
39for (let index = 0; index < proxy.length; index++) {
40const k = proxy[index];
41const i = url.indexOf(k);
42if (i >= 0) {
43not_found = false;
44const element = proxyTable[k];
45const newUrl = element.target + url.slice(i+k.length);
46req.pipe(request({url: newUrl, timeout: 60000},(err)=>{
47if(err){
48console.log('error_url: ', err.code,url);
49res.status(500).send('');
50}
51})).pipe(res);
52break;
53}
54}
55if(not_found) {
56console.log('not_found_url: ', url);
57res.status(404).send('Not found');
58} else {
59console.log('proxy_url: ', url);
60}
61 });
62 交流學習圈582735936
63 const PORT = 8080;
64 app.listen(PORT, () => {
65console.log
66 });