Kratos middleware seems to only apply to unary gRPC operations

[wscalf]

What happened:

We've started using Kratos middleware (recovery, logging, validate) in our project, and noticed that, on the gRPC side, they only seem to apply to unary operations. Our streaming operations don't get validated or logged, and a panic takes down the server (versus on a unary endpoint, they're validated and logged as expected, and panics are handled.)

What you expected to happen:

We expected to either have the middleware apply seamlessly to streaming requests or to have separate streaming middleware we can register (which, to be fair, may exist, but we weren't able to find it.)

How to reproduce it (as minimally and precisely as possible):

Repro project: https://github.com/wscalf/streaming-repro

• "SayHello" is the normal hello world operation + a 50/50 chance of panicking to test the recovery middleware.
• "KeepSayingHello" is an added operation that streams the response every second until the client terminates the connection, at which point it panics (intentionally, to test Commands:
• grpcurl -plaintext -d '{"name":""}' localhost:9000 helloworld.v1.Greeter.SayHello: gets correctly rejected with a validation error
• grpcurl -plaintext -d '{"name":""}' localhost:9000 helloworld.v1.Greeter.KeepSayingHello: should get rejected (it's using the same message) but does not. Also, is coded to panic when the client closes, which should trigger the recovery middleware, but it doesn't- it just exits
• grpcurl -plaintext -d '{"name":"Kratos"}' localhost:9000 helloworld.v1.Greeter.SayHello: is valid, and is coded to have a 50/50 chance of panicking, which does correctly trigger the recovery middleware, returning an error to the client and not exiting.

Anything else we need to know?:

Environment:

• Kratos version (use kratos -v): kratos version v2.7.3
• Go version (use go version): go version go1.22.2 linux/amd64
• OS (e.g: cat /etc/os-release):

NAME="Fedora Linux"
VERSION="40 (Workstation Edition)"
ID=fedora
VERSION_ID=40
VERSION_CODENAME=""
PLATFORM_ID="platform:f40"
PRETTY_NAME="Fedora Linux 40 (Workstation Edition)"
ANSI_COLOR="0;38;2;60;110;180"
LOGO=fedora-logo-icon
CPE_NAME="cpe:/o:fedoraproject:fedora:40"
DEFAULT_HOSTNAME="fedora"
HOME_URL="https://fedoraproject.org/"
DOCUMENTATION_URL="https://docs.fedoraproject.org/en-US/fedora/f40/system-administrators-guide/"
SUPPORT_URL="https://ask.fedoraproject.org/"
BUG_REPORT_URL="https://bugzilla.redhat.com/"
REDHAT_BUGZILLA_PRODUCT="Fedora"
REDHAT_BUGZILLA_PRODUCT_VERSION=40
REDHAT_SUPPORT_PRODUCT="Fedora"
REDHAT_SUPPORT_PRODUCT_VERSION=40
SUPPORT_END=2025-05-13
VARIANT="Workstation Edition"
VARIANT_ID=workstation

• Others: