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Add middleware to return the server version when requested, unless disabled #572
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| package serverversion | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
||
| "github.com/authzed/authzed-go/pkg/requestmeta" | ||
| "github.com/authzed/authzed-go/pkg/responsemeta" | ||
| "github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors" | ||
| "github.com/rs/zerolog/log" | ||
| "google.golang.org/grpc" | ||
| "google.golang.org/grpc/metadata" | ||
|
|
||
| "github.com/authzed/spicedb/pkg/releases" | ||
| ) | ||
|
|
||
| type handleServerVersion struct { | ||
| isEnabled bool | ||
| } | ||
|
|
||
| func (r *handleServerVersion) ServerReporter(ctx context.Context, _ interceptors.CallMeta) (interceptors.Reporter, context.Context) { | ||
| if r.isEnabled { | ||
| if md, ok := metadata.FromIncomingContext(ctx); ok { | ||
| if _, isRequestingVersion := md[string(requestmeta.RequestServerVersion)]; isRequestingVersion { | ||
| version, err := releases.CurrentVersion() | ||
| if err != nil { | ||
| log.Ctx(ctx).Err(err).Msg("could not load current software version") | ||
| return interceptors.NoopReporter{}, ctx | ||
| } | ||
|
|
||
| err = responsemeta.SetResponseHeaderMetadata(ctx, map[responsemeta.ResponseMetadataHeaderKey]string{ | ||
| responsemeta.ServerVersion: version, | ||
| }) | ||
| if err != nil { | ||
| log.Ctx(ctx).Err(err).Msg("could not report metadata") | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return interceptors.NoopReporter{}, ctx | ||
| } | ||
|
|
||
| // UnaryServerInterceptor returns a new interceptor which handles server version requests. | ||
| func UnaryServerInterceptor(isEnabled bool) grpc.UnaryServerInterceptor { | ||
| return interceptors.UnaryServerInterceptor(&handleServerVersion{isEnabled}) | ||
| } | ||
|
|
||
| // StreamServerInterceptor returns a new interceptor which handles server version requests. | ||
| func StreamServerInterceptor(isEnabled bool) grpc.StreamServerInterceptor { | ||
| return interceptors.StreamServerInterceptor(&handleServerVersion{isEnabled}) | ||
| } |
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why are we using two
dashboardkey inside a flagThere was a problem hiding this comment.
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One is the flag prefix, the other is the service name