直接上代码：
$url = $this->getconfig ()->url ();
$content = "var url={ base:'{$url->base}',css:'{$url->css}',js:'{$url->js}',img:'{$url->img}',current:window.location};";
$expire = 604800;
header ( 'content-type: application/x-javascript' );
header ( 'cache-control: max-age=' . $expire );
header ( 'accept-ranges: bytes' );
header ( 'content-length: ' . strlen ( $content ) );
echo $content;
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