docs: def safe_mkstemp(suffix, prefix='filedownloadutils_'):
      """Create a temporary filename that don't have any '.' inside a part
      from the suffix."""
      tmpfd, tmppath = tempfile.mkstemp(
          suffix=suffix,
          prefix=prefix,
          dir=current_app.config['CFG_TMPSHAREDDIR']
      )
      # Close the file and leave the responsability to the client code to
      # correctly open/close it.
      os.close(tmpfd)
  
      if '.' not in suffix:
          # Just in case format is empty
          return tmppath
      while '.' in os.path.basename(tmppath)[:-len(suffix)]:
          os.remove(tmppath)
          tmpfd, tmppath = tempfile.mkstemp(
              suffix=suffix,
              prefix=prefix,
              dir=current_app.config['CFG_TMPSHAREDDIR']
          )
          os.close(tmpfd)
      return tmppath