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reqid.go
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reqid.go
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package reqid
import (
"context"
"github.com/boxgo/box/pkg/grpc/wrapper"
"github.com/boxgo/box/pkg/trace"
"github.com/boxgo/box/pkg/util/strutil"
"google.golang.org/grpc"
"google.golang.org/grpc/metadata"
)
func UnaryRequestId() grpc.UnaryServerInterceptor {
return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (resp interface{}, err error) {
md, ok := metadata.FromIncomingContext(ctx)
if !ok {
return handler(ctx, req)
}
newCtx := wrapCtx(ctx, md)
return handler(newCtx, req)
}
}
func StreamRequestId() grpc.StreamServerInterceptor {
return func(srv interface{}, ss grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
ctx := ss.Context()
md, ok := metadata.FromIncomingContext(ctx)
if !ok {
return handler(srv, ss)
}
wrapped := wrapper.WrapServerStream(ss)
wrapped.WrappedContext = wrapCtx(ctx, md)
return handler(srv, wrapped)
}
}
func wrapCtx(ctx context.Context, md metadata.MD) context.Context {
key := trace.ReqID()
val, exist := getReqId(md)
if exist {
return ctx
}
newMd := md.Copy()
newMd.Set(key, val)
return metadata.NewIncomingContext(ctx, newMd)
}
func getReqId(md metadata.MD) (string, bool) {
if id := strutil.First(md.Get(trace.ReqID())); id != "" {
return id, true
}
return strutil.ShortID(), false
}