how to get PDF page count when calling api

MolallaComm

We are generating some PDF bills and would like to see all the ones that are greater than two pages long (i.e. will not fit on front and back of a single sheet). In searching the web, I saw several older mentions that this was returned in the headers when you call the API, but in debugging (either in jsreport studio or in my own code) I don't see that being returned. Is this possible and if so, how? Using v3.11.3 at the moment if that helps.

admin

You can use jsreport script to post-process the output pdf and add numbers of pages to the headers.

const jsreport = require('jsreport-proxy')
async function afterRender (req, res) {
   const { External } = await jsreport.npm.require('@jsreport/pdfjs@1.4.1')
   const external = new External(res.content)
   res.meta.headers['MY_NUMBER_OF_PAGES'] = external.pages.length
}

Demo
https://playground.jsreport.net/w/anon/DADDujdJ

benben-user

follow up question for the answer :

as pdfjs is already installed package in JSreport why do we need to use jsreport.npm.require ?

admin

to avoid breaking changes affecting your script...

but you don't need to

MolallaComm

Thank you - seems to work well and was easy!