Python 如何根据状态代码重试异步aiohttp请求
我正在使用一个api,有时它会给出一些奇怪的状态代码,这些代码可以通过简单地重试相同的请求来修复。我使用aiohttp异步地向这个api发出请求 我还使用回退库重试请求,但是似乎401个请求仍然没有被重试Python 如何根据状态代码重试异步aiohttp请求,python,python-3.x,python-asyncio,aiohttp,Python,Python 3.x,Python Asyncio,Aiohttp,我正在使用一个api,有时它会给出一些奇怪的状态代码,这些代码可以通过简单地重试相同的请求来修复。我使用aiohttp异步地向这个api发出请求 我还使用回退库重试请求,但是似乎401个请求仍然没有被重试 @backoff.on_exception(backoff.expo, aiohttp.ClientError, max_tries=11, max_time=60) async def get_user_timeline(self, session, user_id, coun
@backoff.on_exception(backoff.expo, aiohttp.ClientError, max_tries=11, max_time=60)
async def get_user_timeline(self, session, user_id, count, max_id, trim_user, include_rts, tweet_mode):
params = {
'user_id': user_id,
'trim_user': trim_user,
'include_rts': include_rts,
'tweet_mode': tweet_mode,
'count': count
}
if (max_id and max_id != -1):
params.update({'max_id': max_id})
headers = {
'Authorization': 'Bearer {}'.format(self.access_token)
}
users_lookup_url = "/1.1/statuses/user_timeline.json"
url = self.base_url + users_lookup_url
async with session.get(url, params=params, headers=headers) as response:
result = await response.json()
response = {
'result': result,
'status': response.status,
'headers': response.headers
}
return response
如果响应的状态代码不是200或429,我希望所有请求最多退出10次 默认情况下,aiohttp不会引发非200状态的异常。您应该通过
raise\u for_status=True
()将其更改为:
它应该引发任何状态400或更高的异常,从而触发退避
代码2xx可能不应该重试,因为这些
无论如何,如果您仍然想为“200或429以外”筹集资金,您可以手动进行:
if response.status not in (200, 429,):
raise aiohttp.ClientResponseError()
我制作了一个简单的库,可以帮助您:
这样的代码应该可以解决您的问题:
来自aiohttp导入客户端会话
从aiohttp_重试导入RetryClient
状态={x代表范围(100600)内的x}
状态。删除(200)
状态。删除(429)
将ClientSession()作为客户端进行异步:
retry\u client=RetryClient(客户端)
与重试客户端异步。获取(“https://google.com,重试\u尝试次数=10,重试\u状态=状态)作为响应:
text=等待响应。text()
打印(文本)
等待重试\u客户端。关闭()
相反,
google.com
使用你自己的url
也许它太旧了,但是对于任何想知道如何构建这样的解决方案的人来说
RequestData和ErrorResponseData是您的自定义类,它不是内置的
class DataAPI:
def __init__(self, api_data_converter: APIDataConverter):
self.api_data_converter = api_data_converter
async def _bound_fetch(self, request_data: RequestData, session):
try:
async with session.get(request_data.url, raise_for_status=True) as response:
return ResponseData(await response.text())
except aiohttp.ClientConnectionError as e:
Logging.log_exception('Connection error: {}'.format(str(e)))
return ErrorResponseData(url=request_data.url, request_data=request_data)
except Exception as e:
Logging.log_exception('Data API error: {}'.format(str(e)))
return ErrorResponseData(url=request_data.url, request_data=request_data)
async def _run_requests(self, request_data: List[RequestData]):
for rd in request_data:
Logging.log_info('Request: {}'.format(rd.url))
async with aiohttp.ClientSession(timeout=ClientTimeout(total=80)) as session:
tasks = []
for rd in request_data:
task = asyncio.ensure_future(self._bound_fetch(rd, session))
tasks.append(task)
responses = asyncio.gather(*tasks)
return await responses
def get_data(self, request_data: List[RequestData]):
loop = asyncio.new_event_loop()
asyncio.set_event_loop(loop)
skipped = request_data
responses: List[ResponseData] = []
for _ in range(2): # specify your retry count instead of 2
interm_responses = loop.run_until_complete(asyncio.ensure_future(self._run_requests(skipped)))
skipped = []
for resp in interm_responses:
if isinstance(resp, ErrorResponseData):
skipped.append(resp.request_data)
else:
responses.append(resp)
if not skipped:
break
if skipped:
Logging.log_critical('Failed urls remaining')
for resp in responses:
data = self.api_data_converter.convert(resp.response)
if not data:
Logging.log_exception('Data API error')
dt = dateutil.parser.parse(data[-1]['dt'])
resp.response = data
resp.last_candle_dt = dt
return responses
对循环使用
如何?@spectras我使用这个库是因为退避策略。
class DataAPI:
def __init__(self, api_data_converter: APIDataConverter):
self.api_data_converter = api_data_converter
async def _bound_fetch(self, request_data: RequestData, session):
try:
async with session.get(request_data.url, raise_for_status=True) as response:
return ResponseData(await response.text())
except aiohttp.ClientConnectionError as e:
Logging.log_exception('Connection error: {}'.format(str(e)))
return ErrorResponseData(url=request_data.url, request_data=request_data)
except Exception as e:
Logging.log_exception('Data API error: {}'.format(str(e)))
return ErrorResponseData(url=request_data.url, request_data=request_data)
async def _run_requests(self, request_data: List[RequestData]):
for rd in request_data:
Logging.log_info('Request: {}'.format(rd.url))
async with aiohttp.ClientSession(timeout=ClientTimeout(total=80)) as session:
tasks = []
for rd in request_data:
task = asyncio.ensure_future(self._bound_fetch(rd, session))
tasks.append(task)
responses = asyncio.gather(*tasks)
return await responses
def get_data(self, request_data: List[RequestData]):
loop = asyncio.new_event_loop()
asyncio.set_event_loop(loop)
skipped = request_data
responses: List[ResponseData] = []
for _ in range(2): # specify your retry count instead of 2
interm_responses = loop.run_until_complete(asyncio.ensure_future(self._run_requests(skipped)))
skipped = []
for resp in interm_responses:
if isinstance(resp, ErrorResponseData):
skipped.append(resp.request_data)
else:
responses.append(resp)
if not skipped:
break
if skipped:
Logging.log_critical('Failed urls remaining')
for resp in responses:
data = self.api_data_converter.convert(resp.response)
if not data:
Logging.log_exception('Data API error')
dt = dateutil.parser.parse(data[-1]['dt'])
resp.response = data
resp.last_candle_dt = dt
return responses