1 files changed, 10 insertions, 1 deletions
diff --git a/nvdmirror/util.go b/nvdmirror/util.go
index 9cf7d3a..d54e41b 100644
--- a/nvdmirror/util.go
+++ b/nvdmirror/util.go
@@ -16,7 +16,7 @@ func getFileSize(path string) (uint64, error) {
   }
 }
 
-// log array of strings
+// Log array of strings.
 func logArray(key string, strs []string) {
   // populate array
   a := zerolog.Arr()
@@ -27,3 +27,12 @@ func logArray(key string, strs []string) {
   // log array
   log.Info().Array(key, a).Send()
 }
+
+// Get source URL, etag response header, and last-modified response
+// header from fetchResult and save them in the given cache.
+func saveHeaders(cache Cache, fr fetchResult) error {
+  return cache.Set(fr.src, map[string]string {
+    "if-none-match": fr.headers.Get("etag"),
+    "if-modified-since": fr.headers.Get("last-modified"),
+  })
+}