Per message deflate

[azhpushkin]

What do these changes do?

This PR allows to pass optional argument compress to send_str, send_bytes and sent_json methods of ClientWebSocketResponse and WebSocketResponse.

Are there changes in behavior for the user?

Argument is optional and default behavior (compress=None) did not changed so older code is not affected.

Related issue number

Resolves #2551

Checklist

• I think the code is well written
• Unit tests for the changes exist
• Documentation reflects the changes
• Add a new news fragment into the CHANGES folder

[codecov-io]

Codecov Report

Merging #2583 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #2583      +/-   ##
==========================================
+ Coverage   97.71%   97.71%   +<.01%     
==========================================
  Files          36       36              
  Lines        7226     7229       +3     
  Branches     1261     1262       +1     
==========================================
+ Hits         7061     7064       +3     
  Misses         58       58              
  Partials      107      107

Impacted Files	Coverage Δ
aiohttp/http_websocket.py	98.61% <100%> (+0.01%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update d166230...5529e76. Read the comment docs.

[asvetlov]

Thanks!

[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