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find a track in Amazon's MP3 download store
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<?php | |
// documentation: http://developer.amazonwebservices.com/connect/kbcategory.jspa?categoryID=19 | |
class Amazon { | |
// Fill these in; the associate tag is optional | |
private $key = ''; // https://aws-portal.amazon.com/gp/aws/developer/account/index.html?action=access-key | |
private $secret = ''; // https://aws-portal.amazon.com/gp/aws/developer/account/index.html?action=access-key | |
private $tag = ''; // https://affiliate-program.amazon.com/ | |
private $host = 'ecs.amazonaws.com'; | |
private $path = '/onca/xml'; | |
function sign($params){ | |
uksort($params, 'strnatcmp'); | |
foreach ($params as $key => &$value) | |
$value = $key . '=' . rawurlencode($value); // http_build_query uses urlencode rather than rawurlencode | |
return base64_encode(hash_hmac('sha256', implode("\n", array('GET', $this->host, $this->path, implode('&', $params))), $this->secret, TRUE)); | |
} | |
function lookup($request) { | |
$query = implode(' - ', array($request['artist'], $request['album'], $request['track'])); | |
$params = array( | |
'Service' => 'AWSECommerceService', | |
'Version' => '2009-10-01', | |
'Timestamp' => date(DATE_ISO8601), | |
'AWSAccessKeyId' => $this->key, | |
'AssociateTag' => $this->tag, | |
'Operation' => 'ItemSearch', | |
'SearchIndex' => 'MP3Downloads', | |
'ResponseGroup' => 'ItemAttributes,Images', | |
'Keywords' => $query, | |
); | |
$params['Signature'] = $this->sign($params); | |
$xml = simplexml_load_file('http://' . $this->host . $this->path . '?' . http_build_query($params)); | |
if (!is_object($xml) || (string) $xml->Items->Request->IsValid != 'True') | |
return array(); | |
$items = array(); | |
if (!empty($xml->Items->Item)){ | |
foreach ($xml->Items->Item as $item){ | |
$asin = (string) $item->ASIN; | |
$attr = $item->ItemAttributes; | |
$meta = array( | |
'artist' => (string) $attr->Creator, | |
'track' => (string) $attr->Title, | |
'duration' => (string) $attr->RunningTime, | |
'trackno' => (string) $attr->TrackSequence, | |
'sample' => 'http://www.amazon.com/gp/dmusic/get_sample_url.html?ASIN=' . $asin, | |
'info' => (string) $item->DetailPageURL, | |
); | |
foreach (array('LargeImage', 'MediumImage', 'SmallImage') as $image){ | |
if (isset($item->{$image})){ | |
$meta['image'] = (string) $item->{$image}->URL; | |
break; | |
} | |
} | |
$items[] = $meta; | |
} | |
} | |
return $items; | |
} | |
} | |
$api = new Amazon; | |
$items = $api->lookup(array('artist' => 'Nirvana', 'album' => 'Nevermind', 'track' => 'Smells Like Teen Spirit')); | |
print_r($items); | |
/* | |
Array | |
( | |
[0] => Array | |
( | |
[artist] => Nirvana | |
[track] => Smells Like Teen Spirit | |
[duration] => 301 | |
[trackno] => 1 | |
[sample] => http://www.amazon.com/gp/dmusic/get_sample_url.html?ASIN=B000V639BK | |
[info] => http://www.amazon.com/Smells-Like-Teen-Spirit/dp/B000V639BK%3FSubscriptionId%3Dexample%26tag%3D3Dexample%26linkCode%3Dxm2%26camp%3D2025%26creative%3D165953%26creativeASIN%3DB000V639BK | |
[image] => http://ecx.images-amazon.com/images/I/51ntKGgKiDL.jpg | |
) | |
[...] | |
*/ |
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