add HeadBucket

weed/s3api/s3api_bucket_handlers.go

@@ -136,3 +136,31 @@ func (s3a *S3ApiServer) DeleteBucketHandler(w http.ResponseWriter, r *http.Reque
 
 	writeResponse(w, http.StatusNoContent, nil, mimeNone)
 }
+
+func (s3a *S3ApiServer) HeadBucketHandler(w http.ResponseWriter, r *http.Request) {
+
+	vars := mux.Vars(r)
+	bucket := vars["bucket"]
+
+	err := s3a.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+
+		request := &filer_pb.LookupDirectoryEntryRequest{
+			Directory: s3a.option.BucketsPath,
+			Name:      bucket,
+		}
+
+		glog.V(1).Infof("lookup bucket: %v", request)
+		if _, err := client.LookupDirectoryEntry(context.Background(), request); err != nil {
+			return fmt.Errorf("lookup bucket %s/%s: %v", s3a.option.BucketsPath, bucket, err)
+		}
+
+		return nil
+	})
+
+	if err != nil {
+		writeErrorResponse(w, ErrNoSuchBucket, r.URL)
+		return
+	}
+
+	writeSuccessResponseEmpty(w)
+}