Problem with trailer header

[yurifedoseev]

Long story short

I described an issues in #1619 Later I update aiohttp for new version however the problem is still here.

Http response (body and trailers part):
"{ "doc": "some data"}\nX-Custom-Header1=0\r\nX-Custom-Header2=custom2\r\nX-Custom-Header3={}\r\n\r\n

Expected behaviour

aiohttp loads json body and skips trailers. Parsing of the next response should not read any trailers from previous response.

Actual behaviour

aiohttp loads json and do not read any trailer data from reader. Debugging shows that response reader buffer contains this trailer data.
When I use the same session the next response parsing will be started from the trailers. Therefore it leads to parsing exception.

Steps to reproduce

1. Use the same session for requests
2. Get response from server with trailer headers (as shown above)

Your environment

macOS Sierra, aiohttp 2.0.7

[fafhrd91]

could you write test case?

[yurifedoseev]

Sure, in which format it should be?

[fafhrd91]

Doesn't matter, probably in test_client_protocol, I think it would be simplest

[yurifedoseev]

I've found out that the problem was on my side while writing the test case. Your fix works as expected. Thanks!

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