CDP server issues on MacOS (m2)

[addy999]

Running the nightly build and connecting via puppeteer from another terminal:

Terminal 1

./lightpanda-aarch64-macos --host 127.0.0.1 --port 9222
> info(websocket): starting blocking worker to listen on 127.0.0.1:9222
> info(server): accepting new conn...
> info(server): client connected
> info(server): accepting new conn...
> error(handler): stream close error: error.BrokenPipe

Terminal 2:

In [1]: from pyppeteer import launch, connect

In [2]: b = await connect(browserURL="http://127.0.0.1:9222")

In [3]: page = await b.newPage()
---------------------------------------------------------------------------
NetworkError                              Traceback (most recent call last)
Cell In[3], line 1
----> 1 page = await b.newPage()

File ~/miniconda3/lib/python3.11/site-packages/pyppeteer/browser.py:202, in Browser.newPage(self)
    200 async def newPage(self) -> Page:
    201     """Make new page on this browser and return its object."""
--> 202     return await self._defaultContext.newPage()

File ~/miniconda3/lib/python3.11/site-packages/pyppeteer/browser.py:358, in BrowserContext.newPage(self)
    356 async def newPage(self) -> Page:
    357     """Create a new page in the browser context."""
--> 358     return await self._browser._createPageInContext(self._id)

File ~/miniconda3/lib/python3.11/site-packages/pyppeteer/browser.py:209, in Browser._createPageInContext(self, contextId)
    206 if contextId:
    207     options['browserContextId'] = contextId
--> 209 targetId = (await self._connection.send(
    210     'Target.createTarget', options)).get('targetId')
    211 target = self._targets.get(targetId)
    212 if target is None:

NetworkError: Protocol error Target.createTarget: Target closed.

[krichprollsch]

Hello @addy999
Thank you for your bug report.

Can you retry with --verbose option on ligthpanda please?

[krichprollsch]

Here is what I reproduce with the following gist https://gist.github.com/krichprollsch/f510c3c89a21dd70e406a9c79f3b3b06
@addy999 is it accurate? I'm not used to using python...

$ docker run --rm -ti --privileged lpd:issue339
//issue339.py:8: DeprecationWarning: There is no current event loop
  asyncio.get_event_loop().run_until_complete(main())
Traceback (most recent call last):
  File "//issue339.py", line 8, in <module>
    asyncio.get_event_loop().run_until_complete(main())
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^
  File "/usr/local/lib/python3.13/asyncio/base_events.py", line 720, in run_until_complete
    return future.result()
           ~~~~~~~~~~~~~^^
  File "//issue339.py", line 6, in main
    page = await b.newPage()
           ^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/site-packages/pyppeteer/browser.py", line 202, in newPage
    return await self._defaultContext.newPage()
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/site-packages/pyppeteer/browser.py", line 358, in newPage
    return await self._browser._createPageInContext(self._id)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/site-packages/pyppeteer/browser.py", line 213, in _createPageInContext
    raise BrowserError('Failed to create target for page.')
pyppeteer.errors.BrowserError: Failed to create target for page.
debug(cli): Server opts: listening internally on /tmp/lightpanda...
info(websocket): starting blocking worker to listen on 127.0.0.1:9222
info(server): accepting new conn...
debug(websocket): (127.0.0.1:43946) connected
debug(websocket): (127.0.0.1:43952) connected
debug(handler): connected to Stream server
info(server): client connected
debug(websocket): (127.0.0.1:43952) connection successfully upgraded
debug(websocket): (127.0.0.1:43952) received text message
debug(cdp): Req > id 1, method target.getBrowserContexts
debug(cdp): Res > id 1, sessionID null, result cdp.target.getBrowserContexts.Resp{ .browserContextIds = {  } }
debug(websocket): (127.0.0.1:43952) received text message
debug(cdp): Req > id 2, method target.setDiscoverTargets
debug(cdp): Res > id 2, sessionID null, result null
debug(websocket): (127.0.0.1:43952) received text message
debug(cdp): Req > id 3, method target.createTarget
debug(cdp): Event > method Target.attachedToTarget, sessionID null
debug(cdp): Res > id 3, sessionID null, result cdp.target.createTarget { .targetId = 57356548460A8F29706A2ADF14316298 }
debug(websocket): (127.0.0.1:43952) connection closed: error.Closed
info(server): close cmd, closing conn...
debug(server): connection closed
info(server): accepting new conn...
debug(server): read has been canceled

[addy999]

Okay I did it with --verbose

debug(handler): connected to Stream server
info(server): client connected
debug(websocket): (127.0.0.1:61253) connection successfully upgraded
debug(websocket): (127.0.0.1:61253) received text message
debug(cdp): Req > id 1, method target.getBrowserContexts
debug(cdp): Res > id 1, sessionID null, result cdp.target.getBrowserContexts.Resp{ .browserContextIds = {  } }
debug(websocket): (127.0.0.1:61253) received text message
debug(cdp): Req > id 2, method target.setDiscoverTargets
debug(cdp): Res > id 2, sessionID null, result null
debug(websocket): (127.0.0.1:61253) received text message
debug(cdp): Req > id 3, method target.createTarget
debug(cdp): Event > method Target.attachedToTarget, sessionID null
debug(cdp): Res > id 3, sessionID null, result cdp.target.createTarget { .targetId = 57356548460A8F29706A2ADF14316298 }

Now I'm seeing a TegetError

----> 1 page = await b.newPage()

File ~/.pyenv/versions/3.10.10/lib/python3.10/site-packages/pyppeteer/browser.py:202, in Browser.newPage(self)
    200 async def newPage(self) -> Page:
    201     """Make new page on this browser and return its object."""
--> 202     return await self._defaultContext.newPage()

File ~/.pyenv/versions/3.10.10/lib/python3.10/site-packages/pyppeteer/browser.py:358, in BrowserContext.newPage(self)
    356 async def newPage(self) -> Page:
    357     """Create a new page in the browser context."""
--> 358     return await self._browser._createPageInContext(self._id)

File ~/.pyenv/versions/3.10.10/lib/python3.10/site-packages/pyppeteer/browser.py:213, in Browser._createPageInContext(self, contextId)
    211 target = self._targets.get(targetId)
    212 if target is None:
--> 213     raise BrowserError('Failed to create target for page.')
    214 if not await target._initializedPromise:
    215     raise BrowserError('Failed to create target for page.')

BrowserError: Failed to create target for page.

[krichprollsch]

ok thank you, I think I have what I need to start debugging.