set filename in Content-Disposition header

weed/server/common.go

@@ -218,7 +218,7 @@ func handleStaticResources2(r *mux.Router) {
 	r.PathPrefix("/seaweedfsstatic/").Handler(http.StripPrefix("/seaweedfsstatic", http.FileServer(statikFS)))
 }
 
-func adjustHeadersAfterHEAD(w http.ResponseWriter, r *http.Request, filename string) {
+func adjustHeaders(w http.ResponseWriter, r *http.Request, filename string) {
 	if filename != "" {
 		contentDisposition := "inline"
 		if r.FormValue("dl") != "" {

weed/server/filer_server_handlers_read.go

@@ -101,14 +101,14 @@ func (fs *FilerServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request,
 	}
 	setEtag(w, etag)
 
+	filename := entry.Name()
+	adjustHeaders(w, r, filename)
+
 	if r.Method == "HEAD" {
 		w.Header().Set("Content-Length", strconv.FormatInt(int64(filer2.TotalSize(entry.Chunks)), 10))
 		return
 	}
 
-	filename := entry.Name()
-	adjustHeadersAfterHEAD(w, r, filename)
-
 	totalSize := int64(filer2.TotalSize(entry.Chunks))
 
 	if rangeReq := r.Header.Get("Range"); rangeReq == "" {

weed/server/volume_server_handlers_read.go

@@ -244,13 +244,13 @@ func writeResponseContent(filename, mimeType string, rs io.ReadSeeker, w http.Re
 	}
 	w.Header().Set("Accept-Ranges", "bytes")
 
+	adjustHeaders(w, r, filename)
+
 	if r.Method == "HEAD" {
 		w.Header().Set("Content-Length", strconv.FormatInt(totalSize, 10))
 		return nil
 	}
 
-	adjustHeadersAfterHEAD(w, r, filename)
-
 	processRangeRequest(r, w, totalSize, mimeType, func(writer io.Writer, offset int64, size int64) error {
 		if _, e = rs.Seek(offset, 0); e != nil {
 			return e