https://github.com/superman66/node-proxy-api
The simple node proxy api
https://github.com/superman66/node-proxy-api
api express nodejs proxy
Last synced: over 1 year ago
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The simple node proxy api
- Host: GitHub
- URL: https://github.com/superman66/node-proxy-api
- Owner: superman66
- Created: 2017-03-16T01:39:20.000Z (over 9 years ago)
- Default Branch: master
- Last Pushed: 2017-04-26T07:02:04.000Z (about 9 years ago)
- Last Synced: 2025-03-19T05:41:57.248Z (over 1 year ago)
- Topics: api, express, nodejs, proxy
- Language: JavaScript
- Size: 4.88 KB
- Stars: 16
- Watchers: 3
- Forks: 7
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# Node + Express + superagent 转发 Api 请求
简单的几行代码实现如何通过Node + Express + superagent 转发 API 请求。已部署到 Heroku。
**项目中用到了豆瓣电影 Api, 更多 Api请见 [豆瓣Api文档](https://developers.douban.com/wiki/?title=api_v2)**
**安装依赖**
Node.js 转发请求用到了 `express`和`superagent`. [superanget](https://github.com/visionmedia/superagent)是一个 Node.js HTTP client。
```
npm install express superagent --save
```
**端口设置**
由于部署到 Heroku 时，端口是动态分配的，所以需要根据 `process.env.NODE_ENV` 动态设置端口:
```javascript
app.set('port', (process.env.PORT || 5000));
```
如果不需要部署到 Heroku，端口可直接写死。
**定义接口**
根据前端所需，定义了如下三个接口：
```javascript
app.get('/movie/:type', function (req, res) {
var sreq = request.get(HOST + req.originalUrl)
sreq.pipe(res);
sreq.on('end', function (error, res) {
console.log('end');
});
})
app.get('/movie/subject/:id', function (req, res) {
var sreq = request.get(HOST + req.originalUrl)
sreq.pipe(res);
sreq.on('end', function (error, res) {
console.log('end');
});
})
app.get('/movie/search', function (req, res) {
var sreq = request.get(HOST + req.originalUrl)
sreq.pipe(res);
sreq.on('end', function (error, res) {
console.log('end');
});
})
```
**CORS设置**
>跨源资源共享 ( [CORS](https://developer.mozilla.org/zh-CN/docs/Web/HTTP/Access_control_CORS) )机制让Web应用服务器能支持跨站访问控制，从而使得安全地进行跨站数据传输成为可能。
主要是通过设置`Access-Control-Allow-Origin: *`
```javascript
app.all('*', function (req, res, next) {
if (!req.get('Origin')) return next();
// use "*" here to accept any origin
res.set('Access-Control-Allow-Origin', '*');
res.set('Access-Control-Allow-Methods', 'GET');
res.set('Access-Control-Allow-Headers', 'X-Requested-With, Content-Type');
// res.set('Access-Control-Allow-Max-Age', 3600);
if ('OPTIONS' == req.method) return res.send(200);
next();
});
```
**端口监听**
```javascript
app.listen(app.get('port'), function() {
console.log('Node app is running on port', app.get('port'));
});
```
**启动**
```
cd node-proxy
node index.js
```
具体见`node-proxy/index.js`
# 部署到Heroku
详情见： [官方 Getting Started](https://devcenter.heroku.com/articles/getting-started-with-nodejs#introduction)