Localhost unavailable: WSA error

首先，使用显示的 FIRESTORE_EMULATOR_HOST 值以及列出的 Python、Windows 和 emulator 版本，复现 main.py 中的失败。通过 google.api_core 和 grpc 阅读 traceback，然后将 Python 客户端对 emulator 连接的处理方式与正常工作的云配置进行比较。完成的标准是找出可复现的 SDK 或环境原因，并添加有针对性的回归测试或明确受支持的配置指南。

[REQUIRED] Step 2: Describe your environment

• Operating System version: Windows 10
• Firebase SDK version: 12.4.2
• Firebase Product: firestore (auth, database, storage, etc)
• Python version: 3.10.13
• Pip version: 23.2.1

[REQUIRED] Step 3: Describe the problem

I'm dealing with a Python+Emulator problem. My emulator works in Flutter, but not in Python, and it works in Python on Cloud Firestore. It's only the Python+Emulator combo that is giving me trouble.

It was working earlier today, but so far my backtracking attempts have been unsuccessful.

I've tried restarting my machine, and the emulator, but neither have worked so far.

Steps to reproduce:

What happened? How can we make the problem occur?
This could be a description, log/console output, etc.

Traceback (most recent call last):
  File "D:\Programs\anaconda3\envs\info_extractor\lib\site-packages\google\api_core\grpc_helpers.py", line 162, in error_remapped_callable
    return _StreamingResponseIterator(
  File "D:\Programs\anaconda3\envs\info_extractor\lib\site-packages\google\api_core\grpc_helpers.py", line 88, in __init__        
    self._stored_first_result = next(self._wrapped)
  File "D:\Programs\anaconda3\envs\info_extractor\lib\site-packages\grpc\_channel.py", line 541, in __next__
    return self._next()
  File "D:\Programs\anaconda3\envs\info_extractor\lib\site-packages\grpc\_channel.py", line 967, in _next
    raise self
grpc._channel._MultiThreadedRendezvous: <_MultiThreadedRendezvous of RPC that terminated with:
        status = StatusCode.UNAVAILABLE
        details = "DNS resolution failed for http://localhost:8080: UNAVAILABLE: WSA Error"
        debug_error_string = "UNKNOWN:DNS resolution failed for http://localhost:8080: UNAVAILABLE: WSA Error {created_time:"2023-10-07T20:33:00.4853876+00:00", grpc_status:14}"
>

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "D:\Programs\anaconda3\envs\info_extractor\lib\site-packages\google\api_core\retry.py", line 191, in retry_target
    return target()
  File "D:\Programs\anaconda3\envs\info_extractor\lib\site-packages\google\api_core\timeout.py", line 120, in func_with_timeout   
    return func(*args, **kwargs)
  File "D:\Programs\anaconda3\envs\info_extractor\lib\site-packages\google\api_core\grpc_helpers.py", line 166, in error_remapped_callable
    raise exceptions.from_grpc_error(exc) from exc
google.api_core.exceptions.ServiceUnavailable: 503 DNS resolution failed for http://localhost:8080: UNAVAILABLE: WSA Error        

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "d:\Projects\info_extractor\main.py", line 66, in <module>
    print(doc_ref.get())
  File "D:\Programs\anaconda3\envs\info_extractor\lib\site-packages\google\cloud\firestore_v1\query.py", line 172, in get
    return list(result)
  File "D:\Programs\anaconda3\envs\info_extractor\lib\site-packages\google\cloud\firestore_v1\query.py", line 287, in stream      
    response_iterator, expected_prefix = self._get_stream_iterator(
  File "D:\Programs\anaconda3\envs\info_extractor\lib\site-packages\google\cloud\firestore_v1\query.py", line 221, in _get_stream_iterator
    response_iterator = self._client._firestore_api.run_query(
  File "D:\Programs\anaconda3\envs\info_extractor\lib\site-packages\google\cloud\firestore_v1\services\firestore\client.py", line 
1309, in run_query
    response = rpc(
  File "D:\Programs\anaconda3\envs\info_extractor\lib\site-packages\google\api_core\gapic_v1\method.py", line 113, in __call__    
    return wrapped_func(*args, **kwargs)
  File "D:\Programs\anaconda3\envs\info_extractor\lib\site-packages\google\api_core\retry.py", line 349, in retry_wrapped_func    
    return retry_target(
  File "D:\Programs\anaconda3\envs\info_extractor\lib\site-packages\google\api_core\retry.py", line 207, in retry_target
    raise exceptions.RetryError(
google.api_core.exceptions.RetryError: Deadline of 300.0s exceeded while calling target function, last exception: 503 DNS resolution failed for http://localhost:8080: UNAVAILABLE: WSA Error

Also, this comes out of one of the emulator processes (unsure which):

Oct 07, 2023 8:54:35 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.

Relevant Code:

My .env:

FIRESTORE_EMULATOR_HOST=http://localhost:8080
STORAGE_EMULATOR_HOST=http://localhost:9199

When I remove http:// from the variables, I get instead that no connection adapters are available.

import firebase_admin


def initialize_firestore():
    app = firebase_admin.initialize_app()
    db = firestore.client()
    return app, db


if __name__ == "__main__":
    callback_done = threading.Event()

    app, db =initialize_firestore()
    doc_ref = db.collection('files').where(
        filter=FieldFilter('extractedText', '==', ''))
    print(doc_ref.get())
    print('Statement complete')

Code hangs on the second-to-last statement. It works fine on Google Cloud, it's only on emulator that it doesn't work, which is why I'm posting here.