(Firebase / Cloud Functions) PayloadTooLargeError: too many parameters at queryparse

Question

I have a firebase function that is triggered by a webhook in 3rd party application. They make a post call to my function with application/x-www-urlencoded type and there are more than 1000 parameters in their post body. 1000 is default number of params in body-parser package and when it hits the limit it throws the error.

PayloadTooLargeError: too many parameters at queryparse 
(/srv/node_modules/body-parser/lib/types/urlencoded.js:151:13) at parse 
(/srv/node_modules/body-parser/lib/types/urlencoded.js:75:9)

As far as I know, firebase function also has express and body-parser running in the background and I was wondering if there is a way to modify these parameter limits. I saw a few examples to modify these settings, however below solution did not work for firebase function since it did not modify actual body-parser running behind the firebase functions.

var bodyParser = require('body-parser');

app.use(bodyParser.urlencoded({
        extended: false,
     parameterLimit: 10000,
     limit: 1024 * 1024 * 10
}));

Any suggestions or solutions will be appreciated. Thank you.

Answer 1

I don't think the behavior of the body parsing middleware can be changed in any way. There's nothing in the documentation that suggests any configuration options.

If it's possible, I suggest instead having the client POST a JSON payload instead, which can contain whatever valid JSON you want.

Another alternative might be to not use the JavaScript runtime, and try Python or Go instead using the Google Cloud deployment tools. You won't be able to use the Firebase CLI any more, but the other runtimes might have different behavior that suits your needs.