Yesterday using our software, based on RXDB with RXServer (Express) as backend, on a bigger live event than before, we suddenly experienced failed synchronizations. All the affected client was receiving was 413 Request entity too large. A look at the backend logs revealed, it was continuously throwing nodejs PayloadTooLargeError: request entity too large errors. Looking for the cause, it seems express limits json parsing by default to 1mb.

So as a dirty workaround, in RxServerAdapterExpress, create(), I changed app.use(express.json()); to app.use(express.json({limit: '500mb'})); and thing recovered.

Once app.use(express.json()); is called in the RxServerAdapterExpress function, further calls with different options are ignored.

Since (as far as I see), there currently is no possibility to give custom options to the Express adapter, what would be you're preferred design (@pubkey).

Or is there a (to me unknown) option on the client side to restrict the payload size?