PayloadTooLargeError: request entity too large
To handle the "PayloadTooLargeError: request entity too large" error in an Express application, you can follow these steps:
- Install the
express
andbody-parser
packages if you haven't already done so. You can install them using npm (Node Package Manager) by running the following command in your terminal:
npm install express body-parser
- Require the necessary modules in your Express application file. Typically, this file is named
app.js
orindex.js
. Add the following lines of code at the top of your file:
const express = require('express');
const bodyParser = require('body-parser');
- Configure the body-parser middleware to handle the request payload. Body-parser is used to parse the incoming request body and make it available in the
req.body
property. Add the following line of code after creating the Express app instance:
app.use(bodyParser.urlencoded({ extended: true }));
- Increase the
limit
option of body-parser to allow larger request payloads. By default, body-parser limits the request payload size to 100kb. You can increase this limit by adding the following line of code after theapp.use()
line:
app.use(bodyParser.json({ limit: '10mb' }));
In this example, the limit is set to 10mb (megabytes), but you can adjust it according to your needs.
- Handle the error in your Express error-handling middleware. When the request payload exceeds the specified limit, Express will throw the
PayloadTooLargeError
. To handle this error and send an appropriate response to the client, add the following code after all your other routes and middleware:
app.use(function (err, req, res, next) {
if (err instanceof bodyParser.JsonPayloadTooLargeError) {
res.status(413).send('Request entity too large');
} else {
next(err);
}
});
That's it! With these steps, you have configured your Express application to handle the "PayloadTooLargeError: request entity too large" error and provide a suitable response to the client when the request payload exceeds the specified limit.