A problem with a post method (using fetch and express)
Question
I'm a very beginner so I hope my question is not that stupid. What I want to do is to pass a longitude and a latitude from a client-side javascript into a node.js on a server-side. I'm using a fetch and express.js.
Below my html code:
<!DOCTYPE html>
<html lang="en">
<head>
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
</head>
<body>
latitude: <span id="latitude"></span>°<br />
longitude: <span id="longitude"></span>°<br />
</p>
<button id="geolocate">geolocate</button>
<script src="main.js"></script>
</body>
</html>
Here's a little sample from my main.js:
document.getElementById('geolocate').addEventListener('click', event => {
if ('geolocation' in navigator) {
console.log('geolocation available');
navigator.geolocation.getCurrentPosition(position => {
var X = position.coords.latitude;
var Y = position.coords.longitude;
console.log(X, Y);
document.getElementById('latitude').textContent = X;
document.getElementById('longitude').textContent = Y;
const data = {X, Y}
const options = {
method: 'POST',
body: JSON.stringify(data),
headers: {
'content-type': 'application/json'
}
}
fetch('/api', options);
});
} else {
console.log('geolocation not available');
}
});
And here you can see my node.js code:
const express = require('express');
const app = express();
app.listen(3000, () => console.log('listening at 3000'));
app.post('/api', (req, res) => {
console.log(req);
});
When I run it I receive an 404 error. I have no idea what I'm doing wrong here. I'll be grateful for any advice.
EDIT:
This app is working on my VPS. I also have a domain with SSL aliases. To run node.js I use nodemon as a process. Here are the logs:
user_name_with_sudo 11451 0.5 3.6 663672 38152 pts/0 Sl+ 11:05 0:00 node /bin/nodemon index.js $
As you can see it's a process.
httpd service status - Oct 20 17:14:21 www.{my domain}.pl systemd[1]: Started The Apache HTTP Server.
As you can see I'm working on centOS7
1 answers
solution1
0 2020-10-20 17:33:16
Try to add full path for the fetch. You are listening server at localhost on the port 3000
main.js:
document.getElementById('geolocate').addEventListener('click', event => {
if ('geolocation' in navigator) {
console.log('geolocation available');
navigator.geolocation.getCurrentPosition(position => {
var X = position.coords.latitude;
var Y = position.coords.longitude;
console.log(X, Y);
document.getElementById('latitude').textContent = X;
document.getElementById('longitude').textContent = Y;
const data = {X, Y}
const options = {
method: 'POST',
body: JSON.stringify(data),
headers: {
'content-type': 'application/json'
}
}
fetch('http://localhost:3000/api', options)
.then(response => response.json())
.then(data => {
// if everting is ok should log the object message: "Long lang sent to express" from server
console.log(data)
});
});
...
And server side will be like dat
const express = require('express');
const app = express();
app.listen(3000, () => console.log('listening at 3000'));
app.post('/api', (req, res) => {
try {
const {X, Y} = req.body
console.log(X, Y)
res.status(200).json({ message: "Long lang sent to express" })
} catch (e) {
res.status(500).json({ message: 'Something go wrong, try again' })
}
});
Trying to use lowercase variables(example: not use X, Y.. but use x, y) if it not a constants :) Gl with programming
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.