topic Re: Using 3rdparty modules in js runtime. in Developer Q&A Forum

Using 3rdparty modules in js runtime.

DantePaoloni — Wed, 17 Jan 2024 20:52:05 GMT

Hello development team!

The last time I read about JS runtime limitations, I remember the ability to import third-party modules for use in applications and/or workflow tasks. Reading again, https://developer.dynatrace.com/reference/javascript-runtime/ seems like there is much more limited support for importing third party modules.

My use case is to use cheerio to extract information from a scrap via fetch and send the value to a metric. Is something like that not possible? Since the moment that I call the cheerio function I get the following error:

An error occurred: {"code": 541, "message": "Execution crashed.", "details": {"type": "BAD_REQUEST", "message": "<stripped secret anyhow::Error>"}}

Thanks in advance 🙂

Re: Using 3rdparty modules in js runtime.

sinisa_zubic — Thu, 18 Jan 2024 13:10:31 GMT

Hi @DantePaoloni

Yes the JS runtime has some limitations when it comes to 3rd party modules.

I have tried to reproduce your problem. loading data via fetch and using cheerio to extract it. This is my code snippet, it works without any problems

import * as cheerio from "cheerio"; export default async function (payload: unknown = undefined) { const resp = await fetch("https://example.com/"); const txt = await resp.text(); const $ = cheerio.load(txt); console.log($("title").text()); return $("h1").text(); }

Maybe you can share your AppFunction code with us?

Best,
Sini

Re: Using 3rdparty modules in js runtime.

michal_zawislak — Thu, 18 Jan 2024 13:33:05 GMT

If I'm interpreting the error@DantePaoloni shared correctly, he might be using the "Run Javascript" action in Workflows, which currently doesn't support 3rd party libraries.

Re: Using 3rdparty modules in js runtime.

DantePaoloni — Thu, 18 Jan 2024 13:58:43 GMT

Hey, I was re checking again just in case. Indeed is a JS Action in a workflow.

Will eventually be supported? Or this is be something to create in an AppFunction and call it throught a workflow like in https://developer.dynatrace.com/develop/functions/create-function/#from-notebooks-or-workflows ? Im asking in this case the "right" way to handle it.

Re: Using 3rdparty modules in js runtime.

sinisa_zubic — Thu, 18 Jan 2024 14:00:47 GMT

Yes, as of now that would be the workaround.

There have been plans to add 3rd packages support for functions in workflows and notebooks but I don't have any further details on that.