curl get request带来了没有js页面版本

Question

当我带着curl get请求带来www.amazon.com时，我没有获得js页面版本。 我的请求如下：

$ch = curl_init ($url );
$header[0] = "Accept: text/xml,application/xml,application/xhtml+xml,"; 
$header[0] .= "text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5";
$header[] = "Accept-Language: en-us,en;q=0.5"; 
$header[] = "Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7";
$header[] = "Accept-Encoding: deflate";
curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
curl_setopt ($ch, CURLOPT_COOKIEJAR, $ckfile); 
curl_setopt ($ch, CURLOPT_COOKIEFILE, $ckfile);
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt ($ch, CURLOPT_FOLLOWLOCATION,1);
curl_setopt ($ch, CURLOPT_SSL_VERIFYPEER,0);
$res = curl_exec($ch);