[release/8.0-staging] [HTTP/2] Fix handling of effectively empty DATA frame (#99502) #99677
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* Fix handling effectively empty DATA frame * Added test
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Tagging subscribers to this area: @dotnet/ncl |
MihaZupan
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Mar 13, 2024
karelz
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Mar 22, 2024
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Approved by Tactics (@jeffschwMSFT and @artl93) via email on 3/22. Adding Servicing-approved label accordingly. |
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Backport of #99502 to release/8.0-staging
Customer Impact
Reported by Bing crawler. It impacts about 4-5 million URLs they visit a day.
The problem is with specific HTTP/2 servers, which send RFC-valid responses, which are a bit unusual -- they return DATA frame with only padding and no data.
We will interpret it as end of stream (truncating the HTTP response).
Known impacted servers:
Regression
Not a regression.
Testing
Manual testing by user repro case.
We added functional test for this specific case.
Customer validated private bits.
Risk
Low. Specific server behaving in allowed but non-standard way. Also, the change is very small, non-invasive and tested.