protect the cache from DNS responses that lack an Answer, add .gitign…

…ore to ignore vendor/ folder (#51) Co-authored-by: Mike Rheinheimer <mrheinheimer@atlassian.com>
projectdiscovery · Jul 13, 2022 · 1250d5e · 1250d5e
1 parent e377bab
commit 1250d5e
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Showing 2 changed files with 5 additions and 2 deletions.
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1 @@
+vendor/
diff --git a/fastdialer/dialer.go b/fastdialer/dialer.go
@@ -370,8 +370,10 @@ func (d *Dialer) GetDNSData(hostname string) (*retryabledns.DNSData, error) {
 		if data == nil {
 			return nil, ResolveHostError
 		}
-		b, _ := data.Marshal()
-		err = d.hm.Set(hostname, b)
+		if len(data.A)+len(data.AAAA) > 0 {
+			b, _ := data.Marshal()
+			err = d.hm.Set(hostname, b)
+		}
 		if err != nil {
 			return nil, err
 		}