envoyproxy / envoyproxy/envoy

H/2 codec resets streams rejected due to headers with underscores

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#24,466 1 comment 0 reactions 0 assignees View on GitHub
area/header_validator bug no stalebot
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Description

If Envoy is configured to reject requests with underscores in header keys, the H/2 codec will reset the stream instead of sending 400 (like H/1).

Make this behavior consistent across all codecs, by responding with 400.

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