从浏览器(使用Express)在Node js中调用方法 [英] Calling method in Node js from browser (Using Express)
问题描述
我在app.js中定义了这三个路由
I defined these three routes in app.js
app.use('/', require('./routes/index'));
app.use('/LEDon', require('./routes/LEDon'));
app.use('/LEDoff', require('./routes/LEDoff'));
在我的路由文件中，我有以下内容:
In my route file I have the following:
var express = require('express');
var router = express.Router();
var Gpio = require('onoff').Gpio,
led = new Gpio(17, 'out');
router.get('/', function(req, res, next) {
led.writeSync(1);
});
module.exports = router;
因此，当我转到/LEDon页面时，该方法将运行，并且一切正常.是否可以在不使用get请求的情况下运行方法?我的主要目标是单击超链接，然后运行该方法.
So when I go to the /LEDon page the method runs and everything works. Is it possible though to run a method without using a get request? My main goal is to just click a hyperlink which then runs the method..
推荐答案
实质上，您是在要求客户端脚本直接调用Node服务器脚本上的函数.除了Ajax POST AFAIK之外，唯一的其他选择是Socket.io
Essentially you are asking your client side script to directly call a function on your Node server script. The only other choice other than an Ajax POST AFAIK is Socket.io
此类似的stackoverflow问题应该帮助您.
我做了一个简单的示例，涉及多个文件:
edit: I made a simple example spanning multiple files:
/test/app.js:
var express = require('express');
var app = express();
app.post('/LEDon', function(req, res) {
console.log('LEDon button pressed!');
// Run your LED toggling code here
});
app.listen(1337);
/test/clientside.js
$('#ledon-button').click(function() {
$.ajax({
type: 'POST',
url: 'http://localhost:1337/LEDon'
});
});
/test/view.html
<!DOCTYPE html>
<head>
</head>
<body>
<button id='ledon-button'>LED on</button>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<script src='clientside.js'></script>
</body>
要运行它: node app.js在终端中，然后在浏览器中打开view.html.尝试按按钮，然后检查您的终端.希望这会有所帮助.
To run it: node app.js in terminal, and open view.html on your browser. Try pressing the button and check out your terminal. Hope this helps.
这篇关于从浏览器(使用Express)在Node js中调用方法的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
