fetch_amazon_jp_cover.php

<?php
$asins = $argv; array_shift($asins);

function fetch_amazon_jp_images($asin)
{
	$opts = array(
		'http'=>array(
		    'method'=>"GET",
		    'header'=>"User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63 Safari/537.36"
		)
	);
	$context = stream_context_create($opts);

	echo "downloading $asin...\n";
	$body = file_get_contents("http://www.amazon.co.jp/gp/product/images/$asin", false, $context);
	if (preg_match_all("|var scaleLevels;([^<]*?)//-->|s", $body, $matches, PREG_SET_ORDER))
	{
		foreach($matches as $match)
		{
			$m = $match[1];
			preg_match_all("|scaleLevels\\[(?P<level>\d+)\\] = new MediaServicesZoomScale\\((?P<width>\d+), (?P<height>\d+), (?P<slice>\d+)\\);|", $m, $levels, PREG_SET_ORDER);
			$l = $levels[count($levels) - 1];
			list($width, $height, $slice, $level) = array($l["width"], $l["height"], $l["slice"], $l["level"]);
			$ws = ceil($width / $slice);
			$hs = ceil($height / $slice);

			$huge = ImageCreateTrueColor($width, $height);
			for ($x = 0; $x < $ws; $x ++)
			{
				for ($y = 0; $y < $hs; $y ++)
				{
					echo "-> drawing ($x, $y) of ($ws, $hs)...\n";
					$part = ImageCreateFromJPEG("http://z2-ec2.images-amazon.com/R/1/a=$asin+d=_SCR($level,$x,$y)_+e=.jpg");
					ImageCopy($huge, $part, $x * $slice, $y * $slice, 0, 0, ImageSX($part), ImageSY($part));
					ImageDestroy($part);
				}
			}

			echo "-> compling...\n";
			ImagePNG($huge, "$asin.png");
		}
	}
}

foreach($asins as $asin)
{
	fetch_amazon_jp_images($asin);
}