I am running a local website with NodeJS on my Pi and I want to control a lamp via an 433MHz sender connected to the Pi. I have already written a bash script which works perfectly to control the lamp but I can't find a way to execute it through the HTML site on the node server. So I am asking whether it is even possible because it doesn't really seem secure to me and how can I implement it in javascript as a function or only on the server side ?
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It is possible to do it server-side, but not client-side, which I think is what you're asking by wanting to "execute it through the HTML site"...goto– goto2019-12-15 20:50:21 +00:00Commented Dec 15, 2019 at 20:50
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i would take a look at socket.io or you could build a express apiNik Hendricks– Nik Hendricks2019-12-15 21:38:30 +00:00Commented Dec 15, 2019 at 21:38
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Yes it is possible with ajax and it is secure if you make it secure.TGrif– TGrif2019-12-15 21:57:42 +00:00Commented Dec 15, 2019 at 21:57
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1 Answer
there are many ways you could go about doing something like this but one way would be creating an api so your website can make api calls to the server to turn the light on and off
so here is a simple example
HTML
<html>
<head>
<script src="https://code.jquery.com/jquery-3.4.1.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
</head>
<body>
<form>
<input type="button" Value="on" onclick="turnOn()">
<input type="button" value="off" onclick="turnOff()">
</form>
</body>
</html>
<script>
function turnOn(){
$.ajax({
url: 'http://localhost:3000/api/light/on',
type: "GET",
dataType: "json",
success: function (data) {
console.log(data);
},
error: function (error) {
console.log(`Error ${error}`);
}
});
}
function turnOff(){
$.ajax({
url: 'http://localhost:3000/api/light/off',
type: "GET",
dataType: "json",
success: function (data) {
console.log(data);
},
error: function (error) {
console.log(`Error ${error}`);
}
});
}
</script>
SERVER
//server.js
const app = require('express')();
const server = require('http').createServer(app);
var cors = require('cors');
const shell = require('shelljs')
var port = 3000;
server.listen(port, () => console.log(`API server running on ${port}!`))
app.use(cors())
app.get('/', (req, res) => {
res.sendFile(__dirname + '/index.html')
})
app.get('/api/light/:status', (req, res) => {
var status = req.param('status')
if(status == 'on'){
shell.exec('./turn-light-on')
res.json({success:"light turned on"})
}else{
shell.exec('./turn-light-off')
res.json({success:"light turned off"})
}
})
all you would have to do is change the file that shell.exec() calls for it to work
this app reqires
- express
- cors
- shelljs
to be installed just npm install the names as listed above
2 Comments
Chris
It works out perfectly thank you so much for your answer it was super helpful!
Nik Hendricks
no problem man if this answered all of your questions could you mark it as the answer