function cache_control()
{
$f_xml = new File($this->set_cache_filename('xml'));
$f_img = new File($this->set_cache_filename('img'), true);
$live = $expire = $this->expire * 3600;
$live++;
// AMAZON_NO_IMAGE - $this->items['Height'] = 91; $this->items['Width'] = 69;
// キャッシュが存在している場合
if ($f_xml->has() && $f_xml->isReadable()) {
// 経過秒数
$live = time() - $f_xml->time();
}
// 一度キャッシュを作成した場合、取得できない場合は継続利用されることになる
if ($expire >= $live) {
$xml = $f_xml->get(true);
// read cache file.
if (empty($xml)) {
$this->items['image'] = '';
$this->items['Height'] = 91;
$this->items['Width'] = 69;
return false;
}
$this->obj_xml = simplexml_load_string($xml);
$this->asin = $this->obj_xml->Items->Item->ASIN;
list($URL, $Height, $Width) = $this->get_image_size();
if ($f_img->has()) {
$this->items['image'] = $f_img->filename;
$this->items['Height'] = $Height;
$this->items['Width'] = $Width;
} else {
$this->items['image'] = '';
$this->items['Height'] = 91;
$this->items['Width'] = 69;
}
return true;
}
// 直接読む場合
$url = $this->ecs_url();
$xml = $this->fetch_xml($url);
if (!empty($this->items['Error'])) {
$this->items['image'] = '';
$this->items['Height'] = 91;
$this->items['Width'] = 69;
return false;
}
// ページが読めた場合
$f_xml->set($xml);
// write xml file.
list($URL, $Height, $Width) = $this->get_image_size();
if (empty($URL)) {
$this->items['image'] = '';
$this->items['Height'] = 91;
$this->items['Width'] = 69;
return true;
}
$img = $this->fetch_img((string) $URL);
if (!empty($img)) {
$f_img->set($img);
// Fileクラスの画像書き込みがちゃんと動かない・・・。
//self::file_write($f_img->filename, $img); // write img file.
}
$this->items['image'] = $f_img->filename;
$this->items['Height'] = $Height;
$this->items['Width'] = $Width;
return true;
}
