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pythonasynchronoustornadoaiohttp

Is there a way to retrieve body asynchronously with Tornado server from a POST/PUT?

With aiohttp server, it is possible to awaitthe request body asynchronously, that way it gives the hand back to the event loop:

async def post_handler(request):
    data = await request.json()
    return aiohttp.web.Response(status = 201, body = data, content_type='application/json')

However using Tornado I can't find a way to make it asynchronously. The only way to retrieve the body is this:

async def post(self):
    data = self.request.body
    self.write(data)

Therefore, if the client sends a big file, the tornado event loop will block until the whole body is retrieve, am I right ?

Solution

  • No, the event loop is not blocked. post() is not run until the body is already fully loaded. To process the body incrementally, see the @stream_request_body decorator.