when i pass this url i need to get all user commit ---> http://localhost:3080/api/msgs/email=k1199@gmail.com but i getting one user commit only and getting this error [Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client]
app.get('/api/msgs/:msg', (req, res) => {
console.log('api/users called!!!!!!!')
const databuffer = fs.readFileSync('notes1.json', 'utf8')
const datajson = databuffer.toString()
const dtafil = JSON.parse(datajson);
id = req.url.split('/')[3]
findname = req.url.split('/')[2]
console.log(findname)
let a = id;
let h = 0;
let k = [];
let pre = [];
for (let i = 0; i < a.length; i++) {
if (a[i] == "=") h = i;
}
for (let j = 1; j < a.length - h; j++) {
k.push(a[h + j]);
}
for (let s = 0; s <= a.length - (k.length + 1); s++) {
pre.push(a[s]);
}
var idegenerator = k.join("");
var idegeneratorlk = pre.join("")
console.log(idegeneratorlk, idegenerator)
if (idegeneratorlk == 'email=') {
for(i=0;i<=dtafil.length;i++){
if(dtafil[i].namees === idegenerator){
console.log(dtafil[i])
res.json(dtafil[i]);
}
}
// const user = dtafil.find((i) => i.namees === idegenerator)
// res.json(user);
} else if (idegeneratorlk == 'youtube=') {
const user = dtafil.find((i) => i.youtube === idegenerator)
res.json(user);
}
else {
res.json('404 Not fount');
}
});In the simple term, ERR_HTTP_HEADERS_SENT means then you are sending a response more than one time for the same request.
As in you code see this for loop:
for(i=0;i<=dtafil.length;i++){
if(dtafil[i].namees === idegenerator){
console.log(dtafil[i])
res.json(dtafil[i]);
}
}
You are sending a JSON response in each iteration that will send the same response back to the client multiple times which you can't.
Save data in some variable and then send a response at once outside of foor loop something like this:
if (idegeneratorlk == 'email=') {
const response = dtafil.filter(data => {
return data.namees === idegenerator;
})
res.json(response);
}
I have just written this pseudo-code for reference which you may ned to edit as per your use case.