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fix(cdm): skip the server header probe for pywidevine and pyplayready remote CDMs

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A reverse proxy or CDN rewrites the Server header, so upstream refused a working serve API.
This commit is contained in:
imSp4rky
2026-09-25 22:54:08 -06:00
parent 2ff02f2afd
commit 4f188b866f
6 changed files with 196 additions and 8 deletions
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docs/reference/configuration/drm.md
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@@ -74,6 +74,13 @@ For the two pywidevine/pyplayready backends, field names are read case-insensiti
styles: `Device Type`/`device_type`, `System ID`/`system_id`, `Security Level`/`security_level`,
`Host`/`host`, `Secret`/`secret`, `Device Name`/`device_name`.
!!! note "Serve APIs behind a proxy"
unshackle does not send upstream's `HEAD` request or examine the `Server` response
header, so the server can operate behind a reverse proxy or a CDN that removes or
changes that header. Thus a `host` that is not a serve API fails at the first licence
request, not when unshackle loads the CDM. On a redirect to a different host or port,
unshackle removes the `secret` from the request.
!!! warning "PlayReady `host` needs a `/playready` suffix"
pyplayready's `RemoteCdm` treats `host` as a base URL and appends its own endpoint paths,
so a PlayReady entry's `host` must include the trailing `/playready` segment (for example