fileserver: Add a few more debug lines (#4063)

caddyserver · Mar 19, 2021 · 0018b9b · 0018b9b
1 parent a48c620
commit 0018b9b
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/modules/caddyhttp/fileserver/staticfiles.go b/modules/caddyhttp/fileserver/staticfiles.go
@@ -295,15 +295,18 @@ func (fsrv *FileServer) openFile(filename string, w http.ResponseWriter) (*os.Fi
 	if err != nil {
 		err = mapDirOpenError(err, filename)
 		if os.IsNotExist(err) {
+			fsrv.logger.Debug("file not found", zap.String("filename", filename), zap.Error(err))
 			return nil, caddyhttp.Error(http.StatusNotFound, err)
 		} else if os.IsPermission(err) {
+			fsrv.logger.Debug("permission denied", zap.String("filename", filename), zap.Error(err))
 			return nil, caddyhttp.Error(http.StatusForbidden, err)
 		}
 		// maybe the server is under load and ran out of file descriptors?
 		// have client wait arbitrary seconds to help prevent a stampede
 		//nolint:gosec
 		backoff := weakrand.Intn(maxBackoff-minBackoff) + minBackoff
 		w.Header().Set("Retry-After", strconv.Itoa(backoff))
+		fsrv.logger.Debug("retry after backoff", zap.String("filename", filename), zap.Int("backoff", backoff), zap.Error(err))
 		return nil, caddyhttp.Error(http.StatusServiceUnavailable, err)
 	}
 	return file, nil