From 5d0340e435f90599a8072ad8cd67ef8ef4be116a Mon Sep 17 00:00:00 2001
From: Sergey Matveev <stargrave@stargrave.org>
Date: Fri, 6 Dec 2019 16:44:55 +0300
Subject: [PATCH] Check for 404 error of .asc downloads

---
 gocheese.go | 33 +++++++++++++++++++++------------
 1 file changed, 21 insertions(+), 12 deletions(-)

diff --git a/gocheese.go b/gocheese.go
index 75a7c1c..5ecd959 100644
--- a/gocheese.go
+++ b/gocheese.go
@@ -208,20 +208,29 @@ func refreshDir(
 			}
 		}
 		if filename == filenameGet || gpgUpdate {
-			if _, err = os.Stat(path); err == nil {
-				if resp, err := http.Get(pkgURL.String() + GPGSigExt); err == nil {
-					sig, err := ioutil.ReadAll(resp.Body)
-					resp.Body.Close()
-					if err == nil {
-						if err = WriteFileSync(dirPath, path+GPGSigExt, sig); err != nil {
-							http.Error(w, err.Error(), http.StatusInternalServerError)
-							return false
-						}
-						log.Println(r.RemoteAddr, "pypi downloaded signature", filename)
-					}
-				}
+			if _, err = os.Stat(path); err != nil {
+				goto GPGSigSkip
+			}
+			resp, err := http.Get(pkgURL.String() + GPGSigExt)
+			if err != nil {
+				goto GPGSigSkip
+			}
+			if resp.StatusCode != http.StatusOK {
+				resp.Body.Close()
+				goto GPGSigSkip
+			}
+			sig, err := ioutil.ReadAll(resp.Body)
+			resp.Body.Close()
+			if err != nil {
+				goto GPGSigSkip
+			}
+			if err = WriteFileSync(dirPath, path+GPGSigExt, sig); err != nil {
+				http.Error(w, err.Error(), http.StatusInternalServerError)
+				return false
 			}
+			log.Println(r.RemoteAddr, "pypi downloaded signature", filename)
 		}
+	GPGSigSkip:
 		path = path + SHA256Ext
 		_, err = os.Stat(path)
 		if err == nil {
-- 
2.44.0