Disable static assets caching

ocis-pkg/middleware/static.go

@@ -1,10 +1,8 @@
 package middleware
 
 import (
-	"fmt"
 	"net/http"
 	"path"
-	"strconv"
 	"strings"
 	"time"
 )
@@ -22,18 +20,23 @@ func Static(root string, fs http.FileSystem, ttl int) func(http.Handler) http.Ha
 		),
 	)
 
+	// TODO: investigate broken caching - https://github.com/owncloud/ocis/issues/1094
 	// we don't have a last modification date of the static assets, so we use the service start date
-	lastModified := time.Now().UTC().Format(http.TimeFormat)
-	expires := time.Now().Add(time.Second * time.Duration(ttl)).UTC().Format(http.TimeFormat)
+	//lastModified := time.Now().UTC().Format(http.TimeFormat)
+	//expires := time.Now().Add(time.Second * time.Duration(ttl)).UTC().Format(http.TimeFormat)
 
 	return func(next http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 			if strings.HasPrefix(r.URL.Path, path.Join(root, "api")) {
 				next.ServeHTTP(w, r)
 			} else {
-				w.Header().Set("Cache-Control", fmt.Sprintf("max-age=%s, must-revalidate", strconv.Itoa(ttl)))
-				w.Header().Set("Expires", expires)
-				w.Header().Set("Last-Modified", lastModified)
+				// TODO: investigate broken caching - https://github.com/owncloud/ocis/issues/1094
+				//w.Header().Set("Cache-Control", fmt.Sprintf("max-age=%s, must-revalidate", strconv.Itoa(ttl)))
+				//w.Header().Set("Expires", expires)
+				//w.Header().Set("Last-Modified", lastModified)
+				w.Header().Set("Cache-Control", "no-cache, no-store, max-age=0, must-revalidate, value")
+				w.Header().Set("Expires", "Thu, 01 Jan 1970 00:00:00 GMT")
+				w.Header().Set("Last-Modified", time.Now().UTC().Format(http.TimeFormat))
 				static.ServeHTTP(w, r)
 			}
 		})