I am making a login form using HTML and JavaScript and I want to add the login information like username and password to a JSON file using JavaScript. The object would be of the form:
{username : password}
Here is the code I have so far in JavaScript:
const fs = require("fs");
let usersjson = fs.readFileSync("data.json", "utf8");
let obj = {};
app.post("/login", validate, (req, res) => {
let email = req.body.email;
let password = req.body.password;
obj.email = email;
obj.password = password;
let user = JSON.parse(obj);
user.push(obj);
JSON.stringify(user);
fs.writeFileSync("data.json", usersjson, "utf8");I am using Node.js and Express.js as my backend.
Thanks!
Node.js is single-thread so using readFileSync/writeFileSync is maybe bad idea. Sorry if I incorrect understand your question. Do you want create an empty object or just write in to a file?
app.post('/login', validate, (req, res) => {
const {email, password} = req.body;
const user = {};
user.email = email;
user.password = password;
// need try/catch
fs.writeFileSync('data.json', JSON.stringify(user), 'utf8');
// need return answer from server JSON.stringify(user)
res.json('');
});
If I understood correctly, you want to add the user info to your data.json file every time a user logs in. if so:
app.post('/login', validate, (req, res) => {
let email = req.body.email;
let password = req.body.password;
let user = {email: email, password: password}
const previousData = JSON.parse(fs.readFileSync("./data.json", 'utf8'))
previousData.push(user)
fs.writeFileSync("./data.json", JSON.stringify(previousData), "utf8");
// send a response
});