Add no-cache headers

handlers/assets.go

@@ -3,11 +3,18 @@ package handlers
 import (
 	"log"
 	"net/http"
+	"strings"
 )
 
 // AssetsHandler handles serving static files
 func AssetsHandler(w http.ResponseWriter, r *http.Request) {
 	log.Println("Serving " + r.URL.Path[1:])
+
+	if strings.HasSuffix(r.URL.Path, ".svg") {
+		// don't cache badges
+		w.Header().Set("Cache-control", "no-store, no-cache, must-revalidate")
+	}
+
 	http.ServeFile(w, r, r.URL.Path[1:])
 }
 

handlers/badge.go

@@ -68,5 +68,7 @@ func BadgeHandler(w http.ResponseWriter, r *http.Request, repo string, dev bool)
 		return
 	}
 
+	w.Header().Set("Cache-control", "no-store, no-cache, must-revalidate")
+
 	http.Redirect(w, r, badgeURL(resp.Grade, style, dev), http.StatusTemporaryRedirect)
 }