GRPC library content type breaks Nexus artifact storage

[tmulle]

Describe the bug

This isn't directly a Quarkus bug, but the GRPC library it uses in relation to Nexus/Maven.

We use a corporate Nexus proxy of Maven central as well as our internal libraries.
When trying to build with GRPC libraries in Quarkus I got the following error which ultimately caused Nexus to not store the artifact in the repo.

Turning off strict meta/mime-type validation on the Nexus repo fixes it, but it looks like the mimetype of GRPC is incorrect?

I know most people probably don't use a Nexus Proxy and go straight to Maven Central, I just thought I'd bring it up to help those of us that do and save a day of troublshooting like it took me.

org.sonatype.nexus.repository.view.handlers.ExceptionHandler - Invalid content: GET /io/grpc/protoc-gen-grpc-java/1.65.1/protoc-gen-grpc-java-1.65.1-linux-aarch_64.exe: org.sonatype.nexus.repository.InvalidContentException: Detected content type [application/x-sharedlib], but expected [application/x-executable, application/x-dosexec, application/x-msdownload]: io/grpc/protoc-gen-grpc-java/1.65.1/protoc-gen-grpc-java-1.65.1-linux-aarch_64.exe

Expected behavior

Looks like Nexus thinks the mimetype should be one of: expected [application/x-executable, application/x-dosexec, application/x-msdownload]

Actual behavior

It Detected content type [application/x-sharedlib]

How to Reproduce?

Turn on Validation of mimetype for your repository storage for the Maven Central repo and try to build and you should see an error similiar to:

[ERROR] Failed to execute goal io.quarkus.platform:quarkus-maven-plugin:3.17.7:generate-code (default) on project code-with-quarkus-temporal: Quarkus code generation phase has failed: Failed to bootstrap application in NORMAL mode: Failed to resolve artifact io.grpc:protoc-gen-grpc-java:exe:linux-aarch_64:1.65.1: The following artifacts could not be resolved: io.grpc:protoc-gen-grpc-java:exe:linux-aarch_64:1.65.1 (absent): Could not find artifact io.grpc:protoc-gen-grpc-java:exe:linux-aarch_64:1.65.1 in nexus-mirror

Output of uname -a or ver

linux and osX

Output of java -version

No response

Quarkus version or git rev

3.17.5

Build tool (ie. output of mvnw --version or gradlew --version)

maven

Additional information

No response

[quarkus-bot]

/cc @alesj (grpc), @cescoffier (grpc)

[cescoffier]

Is it related to gRPC or to the artifact resolver?

[cescoffier]

From the report, it seems that the resolver is not using the right mime type. But the resolution is delegated to Maven/Gradle. Not sure we can do anything

[tmulle]

I'm not sure, Nexus is downloading the file just fine for Maven but when Nexus runs its validation on the mimetype it fails and doesn't put it into its cache and those artifacts are not available.

Changing Nexus to NOT be strict about the mimetype makes it work which I'm fine with.

I wasn't sure how the mimetype gets set on the artifact themselves which I think is what Nexus is looking at. Something in the metadata?

Anyway, not sure how to fix it I just wanted to bring it up in case other Nexus users hit this.

[aloubyansky]

@tmulle just for testing purposes, would it work if you added io.grpc:protoc-gen-grpc-java:exe:linux-aarch_64:1.65.1 as a direct dependency of your project?