Request interceptions cause web workers network requests to hang

When setting a request interception to a page, the page’s workers can no longer make network request, because otherwise they will stop responding. both importScripts and fetch.

It is critical to mention that this behavior does work on native CDP

Steps to reproduce

I’ve created a repo with a script that does the following, and also shows that a “native” implementation using CDP alone does work:

• Serve a static site with worker.js that makes a network call of some sort
• Create a new browser page with interceptions:

  await page.setRequestInterception(true);
  await page.on('request', request => request.continue);
  

• See how it causes the worker to stop responding!

Tell us about your environment:

• Puppeteer version: 1.13.0
• Platform / OS version: OSX
• URLs (if applicable):
• Node.js version: v10.15.3

What steps will reproduce the problem?

Please include code that reproduces the issue.

1. Clone https://github.com/Schniz/puppeteer-workers-bug
2. npm i
3. node puppeteer.js

What is the expected result?

The following works:
--------------------
1
{
  "userId": 1,
  "id": 1,
  "title": "delectus aut autem",
  "completed": false
}
finished

But when intercepted, it doesn't!
--------------------------
1

Although it does work with CDP directly:
----------------------------------------
http://localhost:5000/
http://localhost:5000/worker.js
https://jsonplaceholder.typicode.com/todos/1
1
{
  "userId": 1,
  "id": 2,
  "title": "quis ut nam facilis et officia qui",
  "completed": false
}
finished

What happens instead?

The following works:
--------------------
1
{
  "userId": 1,
  "id": 1,
  "title": "delectus aut autem",
  "completed": false
}
finished

But when intercepted, it doesn't!
--------------------------
1

Although it does work with CDP directly:
----------------------------------------
1
{
  "userId": 1,
  "id": 2,
  "title": "quis ut nam facilis et officia qui",
  "completed": false
}
finished

[felixfbecker]

Having the same issue, importScript() is just handling and not triggering the request interceptor. The workaround in https://github.com/puppeteer/puppeteer/issues/4208#issuecomment-563178898 doesn’t solve the problem if you need to intercept the requests that happen inside the worker.

[stale[bot]]

We’re marking this issue as unconfirmed because it has not had recent activity and we weren’t able to confirm it yet. It will be closed if no further activity occurs within the next 30 days.