Under the hood
Useful2 Signal2
Failed WebSocket connections now record why, separating a server rejection from a Cloudflare block.
What's wrong with this entry?
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What
When a WebSocket connection fails to upgrade, the recorded outcome now distinguishes a rejection by the server from one mitigated by Cloudflare, with the HTTP status appended and clamped to 100 to 599. Close reasons for asks that were shown locally but never forwarded are flagged separately.
Evidence
cf_mitigated
Strings lifted out of the shipped bundle, so the claim above can be checked against them.