# Which Problems Are Solved
The CORS handler for the new connectRPC handlers was missing, leading to
unhandled preflight requests and a unusable api for browser based calls,
e.g. cross domain gRPC-web requests.
# How the Problems Are Solved
- Added the http CORS middleware to the connectRPC handlers.
- Added `Grpc-Timeout`, `Connect-Protocol-Version`,`Connect-Timeout-Ms`
to the default allowed headers (this improves also the old grpc-web
handling)
- Added `Grpc-Status`, `Grpc-Message`, `Grpc-Status-Details-Bin` to the
default exposed headers (this improves also the old grpc-web handling)
# Additional Changes
None
# Additional Context
noticed internally while testing other issues
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