aiohttp | 易学教程

aiohttp: rate limiting parallel requests

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问题 APIs often have rate limits that users have to follow. As an example let's take 50 requests/second. Sequential requests take 0.5-1 second and thus are too slow to come close to that limit. Parallel requests with aiohttp, however, exceed the rate limit. To poll the API as fast as allowed, one needs to rate limit parallel calls. Examples that I found so far decorate session.get , approximately like so: session.get = rate_limited(max_calls_per_second)(session.get) This works well for sequential

aiohttp: set maximum number of requests per second

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问题 How can I set maximum number of requests per second (limit them) in client side using aiohttp? 回答1: Since v2.0, when using a ClientSession, aiohttp automatically limits the number of simultaneous connections to 100. You can modify the limit by creating your own TCPConnector and passing it into the ClientSession . For instance, to create a client limited to 50 simultaneous requests: import aiohttp connector = aiohttp.TCPConnector(limit=50) client = aiohttp.ClientSession(connector=connector) In

How could I use requests in asyncio?

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I want to do parallel http request tasks in asyncio , but I find that python-requests would block the event loop of asyncio . I've found aiohttp but it couldn't provide the service of http request using a http proxy. So I want to know if there's a way to do asynchronous http requests with the help of asyncio . christian To use requests (or any other blocking libraries) with asyncio, you can use BaseEventLoop.run_in_executor to run a function in another thread and yield from it to get the result. For example: import asyncio import requests @asyncio.coroutine def main(): loop = asyncio.get_event

How could I use requests in asyncio?

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问题 I want to do parallel http request tasks in asyncio , but I find that python-requests would block the event loop of asyncio . I\'ve found aiohttp but it couldn\'t provide the service of http request using a http proxy. So I want to know if there\'s a way to do asynchronous http requests with the help of asyncio . 回答1: To use requests (or any other blocking libraries) with asyncio, you can use BaseEventLoop.run_in_executor to run a function in another thread and yield from it to get the result