René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"asyncio tcp transport on Windows reads bytearray instead of bytes","articleBody":"# Bug report\r\n\r\n`asyncio.Protocol.data_received` prototype not respected: when using `create_connection` to create a tcp transport `data_received` is being called with a `bytearray` object instead of `bytes`.\r\nIf this is expected behaviour libraries like httpx and such should be warned or the prototype modified, although I doubt it's intended because it would suppose the generator doesn't hold reference to it otherwise data could change while stored in buffered stuff.\r\n\r\n```python\r\n\r\nimport sys\r\nprint(f'Python: {sys.version}\\n')\r\n\r\nimport asyncio\r\n\r\nclass MyProto(asyncio.Protocol):\r\n    def data_received(self, data: bytes) -\u003e None:\r\n        print('@@@@@@@@@@ ', data)\r\n    def eof_received(self):\r\n        print('##########')\r\n\r\nasync def main():\r\n    t, proto = await asyncio.get_running_loop().create_connection(MyProto, 'example.com', 80)\r\n    t.write(b'SITE BE MAD\\n\\n')\r\n    await asyncio.sleep(1)\r\n    t.close()\r\n\r\nasyncio.run(main())\r\n\r\n```\r\n\r\nCorrect output: `@@@@@@@@@@  b'HTTP/1.0 ...WHATEVER THE SERVER ANSWERS...'`\r\nFaulty output: `@@@@@@@@@@  bytearray(b'HTTP/1.0 ...WHATEVER THE SERVER ANSWERS...')`\r\n\r\n# Your environment\r\n\r\nOn Windows 11 x64\r\n\r\nTested on:\r\n- 3.11.0 (main, Oct 24 2022, 18:26:48) [MSC v.1933 64 bit (AMD64)]\r\n- 3.10.1 (tags/v3.10.1:2cd268a, Dec  6 2021, 19:10:37) [MSC v.1929 64 bit (AMD64)]\r\n\r\nWorking as expected in:\r\n- 3.9.9 (tags/v3.9.9:ccb0e6a, Nov 15 2021, 18:08:50) [MSC v.1929 64 bit (AMD64)]\r\n\r\n# Related problems\r\n\r\nLink to the thread where I found a conflicting thing (it's being solved there as a workaround)\r\nhttps://github.com/encode/httpx/discussions/2305#discussioncomment-4288553\r\n\r\n**EDIT:** simplified the minimal example\r\n\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-100053\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/DarioDaF","@type":"Person","name":"DarioDaF"},"datePublished":"2022-12-02T02:58:13.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":14},"url":"https://github.com/99941/cpython/issues/99941"}