I am currently working on an Angular 6 + Express.JS application and have encountered a problem. When multiple requests are made simultaneously, especially when there are more than 4 requests, all of them sometimes respond with a 404 error or get cancelled. I'm wondering if there is an issue with how I am handling requests in Express or if I need to make some adjustments for concurrent requests.
Here is the request handling code:
let requests = [];
files.forEach((file) => {
if (file.type.toLowerCase().includes('zip')) {
requests.push(this.imagesService.uploadArchive(file).pipe(first()));
} else {
requests.push(this.imagesService.saveImage(file).pipe(first()));
}
});
forkJoin(requests).subscribe(
(res) => res.forEach(response => {
this.onSave.emit(response);
}),
(error) => {
console.error(error);
},
() => {
this.close.emit();
}
);
Express route handling:
router.post('/images',
formidable({
encoding: 'utf-8',
uploadDir: path.resolve(__dirname, '..', '..', 'uploads'),
multiples: true,
keepExtensions: true
}),
(req, res, next) => {
// Code goes here...
});
Responses:
UPDATE
router.post('/archives',
formidable({
encoding: 'utf-8',
uploadDir: path.resolve(__dirname, '..', '..', 'uploads'),
multiples: true,
keepExtensions: true
}),
(req, res, next) => {
// Code goes here...
}
);
// Additional functions defined here...
UPDATE 2
While everything works fine if both user and server are on localhost (regardless of running with nginx or not), issues arise when the server is remote.