Question

我是asyncio和aiohttp的新手。我目前收到此错误，并且不确定为什么我的InvalidStateError未来asyncio和RuntimeError我的会话收到Traceback (most recent call last): File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/runpy.py", line 184, in _run_module_as_main "__main__", mod_spec) File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/runpy.py", line 85, in _run_code exec(code, run_globals) File "/Users/bli1/Development/QE/idea/trinity-tracer/tracer/tests/tracer.py", line 100, in <module> sys.exit(main(sys.argv)) File "/Users/bli1/Development/QE/idea/trinity-tracer/tracer/tests/tracer.py", line 92, in main poster.post() File "/Users/bli1/Development/QE/idea/trinity-tracer/tracer/utils/poster.py", line 87, in post results = event_loop.run_until_complete(self.async_post_events(events)) File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/asyncio/base_events.py", line 387, in run_until_complete return future.result() File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/asyncio/futures.py", line 274, in result raise self._exception File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/asyncio/tasks.py", line 239, in _step result = coro.send(None) File "/Users/bli1/Development/QE/idea/trinity-tracer/tracer/utils/poster.py", line 79, in async_post_events task.add_done_callback(self.send_oracle, task.result(), session) File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/asyncio/futures.py", line 268, in result raise InvalidStateError('Result is not ready.') asyncio.futures.InvalidStateError: Result is not ready. Task exception was never retrieved future: <Task finished coro=<Poster.async_post_event() done, defined at /Users/bli1/Development/QE/idea/trinity-tracer/tracer/utils/poster.py:62> exception=RuntimeError('Session is closed',)> Traceback (most recent call last): File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/asyncio/tasks.py", line 239, in _step result = coro.send(None) File "/Users/bli1/Development/QE/idea/trinity-tracer/tracer/utils/poster.py", line 64, in async_post_event async with session.post(self.endpoint, data=event) as resp: File "/Users/bli1/Development/QE/idea/trinity-tracer/lib/python3.5/site-packages/aiohttp/client.py", line 565, in __aenter__ self._resp = yield from self._coro File "/Users/bli1/Development/QE/idea/trinity-tracer/lib/python3.5/site-packages/aiohttp/client.py", line 161, in _request raise RuntimeError('Session is closed') RuntimeError: Session is closed：

POST

我要做的是POST到端点，然后使用相同的事件async发布到另一个端点。这将作为callback

的另一个

    async def async_post_event(self, event, session):
        async with session.post(self.endpoint, data=event) as resp:
            event["tracer"]["post"]["timestamp"] = time.time() * 1000.0
            event["tracer"]["post"]["statusCode"] = await resp.status
            return event

    async def send_oracle(self, event, session):
        async with session.post(self.oracle, data=event) as resp:
            return event["event"]["event_header"]["event_id"], await resp.status

    async def async_post_events(self, events):
        tasks = []
        conn = aiohttp.TCPConnector(verify_ssl=self.secure)
        async with aiohttp.ClientSession(connector=conn) as session:
            for event in events:
                task = asyncio.ensure_future(self.async_post_event(event, session))
                task.add_done_callback(self.send_oracle, task.result(), session)
                tasks.append(task)
        return await asyncio.gather(*tasks)

    def post(self):
        event_loop = asyncio.get_event_loop()
        try:
            events = [self.gen_random_event() for i in range(self.num_post)]
            results = event_loop.run_until_complete(self.async_post_events(events))
            print(results)
        finally:
            event_loop.close()

方法运行

这是我的代码：

<jee:jndi-lookup id="cifDataSource" jndi-name="java:jdbc.datasource.CIFDataSource" resource-ref="true" />

Answer 1

add_done_callback接受回调，而非协程。此外，它是非常低级API的一部分，应由休闲开发人员避免。

但是你的主要错误是在session.post()异步上下文管理器之外调用ClientSession，堆栈跟踪明确指向它。

我已经修改了您的代码段以获取看起来像工作代码的内容：

async def async_post_event(self, event, session):
    async with session.post(self.endpoint, data=event) as resp:
        event["tracer"]["post"]["timestamp"] = time.time() * 1000.0
        event["tracer"]["post"]["statusCode"] = await resp.status
    async with session.post(self.oracle, data=event) as resp:
        return event["event"]["event_header"]["event_id"], await resp.status

async def async_post_events(self, events):
    coros = []
    conn = aiohttp.TCPConnector(verify_ssl=self.secure)
    async with aiohttp.ClientSession(connector=conn) as session:
        for event in events:
            coros.append(self.async_post_event(event, session))
        return await asyncio.gather(*coros)

def post(self):
    event_loop = asyncio.get_event_loop()
    try:
        events = [self.gen_random_event() for i in range(self.num_post)]
        results = event_loop.run_until_complete(self.async_post_events(events))
        print(results)
    finally:
        event_loop.close()

您可以从async_post_event中提取两个帖子到单独的协同程序中，但主要想法保持不变。

使用带有回调的Futures时带有asyncio期货的InvalidStateError和带有aiohttp的RuntimeError

1 个答案: