nl_tokens: Parse cacheControlString
pl_tokens: function parseCacheControl ( cacheControlString ) { let maxAge = 0 ; let staleIfError = 0 ; if ( cacheControlString && typeof cacheControlString === 'string' ) { let match ; while ( ( <mask> = RE_CACHE_CONTROL . exec ( cacheControlString ) ) ) { if ( match [ 1 ] ) { maxAge = parseInt ( match [ 1 ] , 10 ) * 1000 ; } else if ( match [ 2 ] ) { staleIfError = parseInt ( match [ 2 ] , 10 ) * 1000 ; } } } return { maxAge , staleIfError } ; }