all: use HTTP method HEAD to check for image link

Using HEAD does not return the content of image, which consume less
resources on both end.

1 files changed, 5 insertions, 1 deletions

diff --git a/worker.go b/worker.go
index f2be07f..99bef6f 100644
--- a/worker.go
+++ b/worker.go
@@ -129,7 +129,11 @@ func (wrk *worker) scan(linkq linkQueue) {
 		httpResp *http.Response
 		err      error
 	)
-	httpResp, err = http.Get(linkq.url)
+	if linkq.kind == atom.Img {
+		httpResp, err = http.Head(linkq.url)
+	} else {
+		httpResp, err = http.Get(linkq.url)
+	}
 	if err != nil {
 		if linkq.parentUrl == nil {
 			wrk.errq <- err