Postpone web task creation to connection establishment

[asvetlov]

Fix #3052

[codecov-io]

Codecov Report

Merging #3081 into master will decrease coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master   #3081      +/-   ##
=========================================
- Coverage   98.11%   98.1%   -0.01%     
=========================================
  Files          42      42              
  Lines        7750    7763      +13     
  Branches     1349    1356       +7     
=========================================
+ Hits         7604    7616      +12     
  Misses         51      51              
- Partials       95      96       +1

Impacted Files	Coverage Δ
aiohttp/web_protocol.py	91.75% <100%> (+0.02%)	⬆️
aiohttp/client_proto.py	95.67% <0%> (-0.33%)	⬇️

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[pfreixes]

Umm, but moving the task creation when the connection made is triggered is only delaying a loop iteration the task creation. migth be the SSL triggering this issue just because of the time needed to make the SSL handshake? So, maybe better just consider the case and just cancel the task ?

Or am I missing something ?

[asvetlov]

From my understanding, a protocol instance is created immediately on socket accepting but connection_made is called after SSL handshake. If handshake is not successful the protocol is destroyed by GC without connection_lost call.
Another solution could be dropping the task in __del__ but I'd like to avoid this.

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a [new issue] for related bugs.
If you feel like there's important points made in this discussion, please include those exceprts into that [new issue].
[new issue]: https://github.com/aio-libs/aiohttp/issues/new