Is it possible to use jsreportonline api in node and save pdf instead of triggering download

marksmits

Hi All,

I now have a google function that triggers a download to the browser. I'm looking if it is possible to instead create a function that downloads and stores the pdf file on google cloud storage.

Is this possible with jsreportonline or do i need to run my own server?
Can i use jsreport-client in combination with jsreportonline server and how do i authenticate etc?
Or can i just adjust my existing code so that instead of triggering a browser download i get a stream that i can save to disk or something?

I'm now doing this which is working bu i rather save the pdf on the server without triggering the download:

export const generatePdf = async (req: any, res: any) => {
  try {

    const data = {
      template: { shortid: 'XXX' },
      data: {test: 'test'},
      options: {'Content-Disposition': `attachment; filename=test.pdf`}
    };

    const options = {
      method: 'POST',
      headers: {
        'Authorization': 'Basic xxxxxxx',
        'Content-Type': 'application/json',
      },
      uri: 'https://xxx.jsreportonline.net/api/report',
      json: data
    };

    request(options).pipe(res);
  } catch(err) {
    console.log(`Error creating pdf ${err} `)
    return res.sendStatus(500)
  }
}

Thanks,
Mark

bjrmatos

hi!

Is this possible with jsreportonline or do i need to run my own server?

yes, this is possible with both jsreportonline and your own server

Can i use jsreport-client in combination with jsreportonline server and how do i authenticate etc?

yes, you can use jsreport nodejs client with jsreportonline too, using it will look something like this:

 // instead of "https://bjrmatos9.jsreportonline.net/" put here the URL of your jsreportonline account, and your credentials
const client = require('jsreport-client')('https://bjrmatos9.jsreportonline.net/', 'admin', 'password')

client.render({
    ...your options here...
  }).then((response) => {
   // response is a stream, you can use it and save it to disk
   response.pipe(fs.createWriteStream('/some/path/to/store.pdf'))
  }).catch((err) => console.error(err))

Or can i just adjust my existing code so that instead of triggering a browser download i get a stream that i can save to disk or something?

i think you just need to change this part of your code

request(options).pipe(res);

to this

request(options).pipe(fs.createWriteStream('/some/path/to/store.pdf'))

of course if this is your production code, make sure to add correct error handling when handling the streams

marksmits

Thanks a lot!

For anyone who want to try it on firebase

import * as functions from 'firebase-functions'
import * as admin from 'firebase-admin'

admin.initializeApp()

import * as express from 'express'
import * as path from 'path'
import * as jsreport from 'jsreport-client'

const app = express()

const jsreportAdmin = functions.config().jsreport.admin;
const jsreportPassword = functions.config().jsreport.password;
const client = new jsreport('https://xxxxx.jsreportonline.net/', jsreportAdmin, jsreportPassword);

const generatePdf = async () => {
  
  const response = await client.render({
    template: { shortid: 'xxxxx' },
    data: { name: 'dasdasd'},
  })

  const metadata = {
    contentType: 'application/pdf'
  };

  const bucket = admin.storage().bucket();
    
  const fileName = `test.pdf`;
  const filePath = path.join(path.dirname('/test'), fileName);

  // Create upload stream
  const uploadStream = bucket.file(filePath).createWriteStream({metadata});
  response.pipe(uploadStream);
  
  return new Promise((resolve, reject) => uploadStream.on('finish', resolve).on('error', reject));
}

app.get('/generate', async (req, res) => {

  try {
    await generatePdf();
    return res.status(200).json({});
  } catch (error) {
    console.error(error);
    return res.sendStatus(500);
  }
  
});

exports.app = functions.https.onRequest(app);