Usinn gotenberg-js-client in firebase function

[isot1990]

I am trying to use gotenberg-js-client module in a firebase function as below:

**exports.officeToPdf = functions.https.onCall((req, res) => {

const https = require('https');

const {
pipe,
gotenberg,
convert,
url,
please,
} = require('gotenberg-js-client');

const signedUrlOptions = {
// stale options persist even after expiration date
action: 'read',
expires: Date.now() + 1000 * 60 * 2, // invalid date after ten minutes pass
};

const toPDF = pipe(
gotenberg('http://localhost:3000'),
convert,
url,
please,
);

admin
.storage()
.bucket()
.file(req)
.getSignedUrl(signedUrlOptions)
// eslint-disable-next-line promise/always-return
.then(url => {
console.log(url[0]);
// eslint-disable-next-line promise/no-nesting
toPDF(new URL(url[0]))
// eslint-disable-next-line promise/always-return
.then(pdf => {
console.log('ok');
console.log(pdf);
})
.catch(error => {
console.log(error);
});
})
.catch(err => {
console.log(err);
});
});**

but it gives error and it says:

Error: connect ECONNREFUSED 127.0.0.1:3000

I think I need to do something with http://localhost:3000 but I don't know what to do.

Could you help me?

[yumauri]

Hello!
This library is just a client to the Gotenberg tool, hence the name gotenberg-js-client.
This library does not convert anything, it just communicates with running Gotenberg instance, which should be running somewhere...

[isot1990]

Thank you for your quick answer.

So, can I use it directly on my client side? Or do I need to do extra configuration besides installing package?

[yumauri]

I'm not good at Firebase, but I cannot find anything about is it possible to run Docker image within Firebase infrastructure or not...
Gotenberg works as a Docker container. You should run it somewhere and made it available through Internet. Then you can use its address in gotenberg("...") function.

[isot1990]

I have decided to use it in a firebase function after I see this advice:

https://stackoverflow.com/a/66278206

but I couldn’t. If I am able to do that it would be perfect. I hope you help me.

[yumauri]

Hm. Actually, I'm not sure why this answer on SO marked as solution, because it doesn't contain any useful information, nor answer to the question...
To use this library you must have a running instance of Gotenberg. This library doesn't work without it.
Gotenberg — is a completely separate and standalone tool, this library doesn't install and run it, this is not possible.
You can compare it with, let's say, MySQL server. NPM package mysql doesn't install MySQL DBMS, it just connects to existing MySQL server.
The same goes with this library — you install and setup Gotenberg somewhere (in Gotenberg issues I saw some guys mentioned CloudRun, but usually you run it within your infrastructure, not cloud).
And once you have working Gotenberg — you can use this library, to use this existing Gotenberg for converting to PDF.

[karatekaneen]

I have some experience in GCP products and I think (have not tested myself) that Gotenberg would be able to run in Cloud Run without any problems and you should easily be able to run the script you want as a Cloud Function when you have a proper Gotenberg instance running.

Good luck!

[gulien]

Gotenberg actually works on Cloud Run 😄

[isot1990]

Do you have any example @gulien? Because I have tried many times but it didn't work unfortunately.

[gulien]

Did you use the gotenberg/gotenberg:7-cloudrun Docker image? It should work as any other Docker image on Cloud Run.

[isot1990]

you mean that there is a cloud run version of it, right? If yes, I didnt use it. I will try.

[gulien]

Exactly! See linked documentation in my first comment 👍

[isot1990]

Thank you @gulien

[yumauri]

@gulien Oh, thanks for pointing out to documentation!