Feat: Add Streaming functionalities to file uploads

[anisov]

When receiving a large file from a request(use aiohttp) and then transferring it through Graphql, it was necessary to read the data from the request and we can load it into RAM or save it to disk (to avoid memory leaks), and only after that it was possible to transfer it through graphql(use io.BytesIO or open()). In this branch, I tried to solved this problem.

[leszekhanusz]

Thanks for your PR, that's definitely something I wanted to add.

Could you please:

• fix it so that the tests are passing if we do not use the aiohttp optional depency
• add docs on how to use it (new section in docs/usage/file_upload.rst). You can test the docs locally by running make docs

[codecov-io]

Codecov Report

Merging #174 (e5a9508) into master (d3f79e7) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #174   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           14        14           
  Lines          946       949    +3     
=========================================
+ Hits           946       949    +3     

Impacted Files	Coverage Δ
gql/transport/aiohttp.py	100.00% <100.00%> (ø)

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[anisov]

I have embedded your suggestions into the code.

[leszekhanusz]

Looks good!

What I would also like to integrate in this PR is the possibility to send large local files using an asynchronous generator as described here.

Then we would need some test for those two functionalities.

[anisov]

Looks good!

What I would also like to integrate in this PR is the possibility to send large local files using an asynchronous generator as described here.

Then we would need some test for those two functionalities.

Thanks, I'll do it on the weekend

[leszekhanusz]

Very nice!

I just made some small modifications to the docs but cannot push it here.
Could you please check the box:
"Allow edits and access to secrets by maintainers"
Thanks

[anisov]

Very nice!

I just made some small modifications to the docs but cannot push it here.
Could you please check the box:
"Allow edits and access to secrets by maintainers"
Thanks

Thanks! The checkbox in the "Allow maintainers to edit" field was already there, I rearranged it again. Or need to do something else?

[leszekhanusz]

Thanks! The checkbox in the "Allow maintainers to edit" field was already there, I rearranged it again. Or need to do something else?

It seems to work now... I've added my modifications.

[snowPu]

When I try this

result = await client.execute(query, variable_values=params, upload_files=True)

I get an error: Object of type async_generator is not JSON serializable