[BUG] page.route doesn't work with chromium when fetch happens from within a sub worker

[azaleas]

System info

• Playwright Version: 1.38.1
• Operating System: macOS 13.5
• Browser: Chromium

Source code

Link to the GitHub repository with the repro

https://github.com/azaleas/playwright-route-bug

Steps

• run tests with chromium (pnpm run test --project=chromium or npm run test --project=chromium)

Expected

For tests to pass. I have a worker that creates another worker (subworker). The subworker makes a GET request to an API. The request is mocked via page.route to feed a different output. The tests are passing fine in webkit and firefox.

Actual

Tests are hanging on fetch step due to page.route until timeout is reached or tests are force closed/stopped.

[pavelfeldman]

I can repro, there is no Network.requestWillBeSent for the nested worker fetch. There is also no networkId in the Fetch.requestPaused.

pw:protocol ◀ RECV 
{
  "method": "Fetch.requestPaused",
  "params": {
    "requestId": "interception-job-9.0",
    "request": {
      "url": "https://jsonplaceholder.typicode.com/todos/1",
      "method": "GET",
      "headers": {
        "Accept": "*/*",
        "Referer": "http://localhost:5173/",
        "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.5938.62 Safari/537.36"
      },
      "initialPriority": "High",
      "referrerPolicy": "strict-origin-when-cross-origin"
    },
    "frameId": "A428F986F21038EBA77F2B5491D08AB8",
    "resourceType": "XHR"
  },
  "sessionId": "6062893F64A56FF0FA7083FA4815339D"
}

pw:protocol SEND ►
{
  "id": 38,
  "method": "Fetch.failRequest",
  "params": {
    "requestId": "interception-job-9.0",
    "errorReason": "Aborted"
  },
  "sessionId": "6062893F64A56FF0FA7083FA4815339D"
} +0ms

Running as

DEBUG=pw:protocol* npm run test -- --project chromium

[pavelfeldman]

This should now work. There still is a remaining issue with execution within the nested worker in WebKit, but we will wait for an explicit report on it.