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<?php
/* vim:set tabstop=8 softtabstop=8 shiftwidth=8 noexpandtab: */
/**
* AmazonSearch Class
*
* This class takes a token (amazon ID)
* and then allows you to do a search using the REST
* method. Currently it is semi-hardcoded to do music
* searches and only return information abou the album
* art
*
* PHP version 5
*
* LICENSE: GNU General Public License, version 2 (GPLv2)
* Copyright (c) 2001 - 2006 Ampache.org All Rights Reserved
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* @category AmazonSearch
* @package Modules
* @author Karl Vollmer <vollmer@ampache.org>
* @copyright 2001 - 2011 Ampache.org
* @license http://opensource.org/licenses/gpl-2.0 GPLv2
* @version PHP 5.2
* @link http://www.ampache.org/
* @since File available since Release 1.0
*/
/**
* AmazonSearch Class
*
* This class takes a token (amazon ID)
* and then allows you to do a search using the REST
* method. Currently it is semi-hardcoded to do music
* searches and only return information abou the album
* art
*
* @category AmazonSearch
* @package Modules
* @author Karl Vollmer <vollmer@ampache.org>
* @copyright 2001 - 2011 Ampache.org
* @license http://opensource.org/licenses/gpl-2.0 GPLv2
* @version Release:
* @link http://www.ampache.org/
* @since Class available since Release 1.0
*/
class AmazonSearch {
var $base_url_default = "webservices.amazon.com";
var $url_suffix = "/onca/xml";
var $base_url;
var $search;
var $public_key;
var $private_key;
var $results=array(); // Array of results
var $_parser; // The XML parser
var $_grabtags; // Tags to grab the contents of
var $_sourceTag; // source tag don't ask
var $_subTag; // Stupid hack to make things come our right
var $_currentTag; // Stupid hack to make things come out right
var $_currentTagContents;
var $_currentPage=0;
var $_maxPage=1;
var $_default_results_pages=1;
var $_proxy_host=""; // Proxy host
var $_proxy_port=""; // Proxy port
var $_proxy_user=""; // Proxy user
var $_proxy_pass=""; // Proxy pass
function AmazonSearch($public_key, $private_key, $base_url_param = '') {
/* If we have a base url then use it */
if ($base_url_param != '') {
$this->base_url = str_replace('http://', '', $base_url_param);
debug_event('amazon-search-results','Retrieving from ' . $base_url_param . $this->url_suffix,'5');
}
/* Default Operation */
else {
$this->base_url=$this->base_url_default;
debug_event('amazon-search-results','Retrieving from DEFAULT','5');
}
$this->public_key = $public_key;
$this->private_key = $private_key;
$this->_grabtags = array(
'ASIN', 'ProductName', 'Catalog', 'ErrorMsg',
'Description', 'ReleaseDate', 'Manufacturer', 'ImageUrlSmall',
'ImageUrlMedium', 'ImageUrlLarge', 'Author', 'Artist','Title','URL',
'SmallImage','MediumImage','LargeImage');
} // AmazonSearch
/**
* setProxy
* Set the class up to search through an http proxy.
* The parameters are the proxy's hostname or IP address (a string)
* port, username, and password. These are passed directly to the
* Snoopy class when the search is done.
*/
function setProxy($host='', $port='', $user='', $pass='') {
if($host) $this->_proxy_host = $host;
if($port) $this->_proxy_port = $port;
if($user) $this->_proxy_user = $user;
if($pass) $this->_proxy_pass = $pass;
}
/*!
@create_parser
@discussion this sets up an XML Parser
*/
function create_parser() {
$this->_parser = xml_parser_create();
xml_parser_set_option($this->_parser, XML_OPTION_CASE_FOLDING, false);
xml_set_object($this->_parser, $this);
xml_set_element_handler($this->_parser, 'start_element', 'end_element');
xml_set_character_data_handler($this->_parser, 'cdata');
} // create_parser
/*!
@function search
@discussion do a full search on the url they pass
*/
function run_search($url) {
/* Create the Parser */
$this->create_parser();
$snoopy = new Snoopy;
if($this->_proxy_host)
$snoopy->proxy_host = $this->_proxy_host;
if($this->_proxy_port)
$snoopy->proxy_port = $this->_proxy_port;
if($this->_proxy_user)
$snoopy->proxy_user = $this->_proxy_user;
if($this->_proxy_pass)
$snoopy->proxy_pass = $this->_proxy_pass;
$snoopy->fetch($url);
$contents = $snoopy->results;
if (!xml_parse($this->_parser, $contents)) {
debug_event('amazon-search-results','Error:' . sprintf('XML error: %s at line %d',xml_error_string(xml_get_error_code($this->_parser)),xml_get_current_line_number($this->_parser)),'1');
}
xml_parser_free($this->_parser);
} // run_search
/*!
@function search
@discussion takes terms and a type
*/
function search($terms, $type='Music') {
$params = array();
$params['Service'] = 'AWSECommerceService';
$params['AWSAccessKeyId'] = $this->public_key;
$params['Timestamp'] = gmdate("Y-m-d\TH:i:s\Z");
$params['Version'] = '2009-03-31';
$params['Operation'] = 'ItemSearch';
$params['Artist'] = $terms['artist'];
$params['Title'] = $terms['album'];
$params['Keywords'] = $terms['keywords'];
$params['SearchIndex'] = $type;
ksort($params);
$canonicalized_query = array();
foreach ($params as $param => $value)
{
$param = str_replace("%7E", "~", rawurlencode($param));
$value = str_replace("%7E", "~", rawurlencode($value));
$canonicalized_query[] = $param."=".$value;
}
$canonicalized_query = implode('&', $canonicalized_query);
$string_to_sign = 'GET' . "\n" . $this->base_url . "\n" . $this->url_suffix . "\n" . $canonicalized_query;
$signature = base64_encode(hash_hmac("sha256", $string_to_sign, $this->private_key, True));
$signature = str_replace("%7E", "~", rawurlencode($signature));
$url = 'http://' . $this->base_url . $this->url_suffix . '?' . $canonicalized_query . '&Signature=' . $signature;
$this->run_search($url);
unset($this->results['ASIN']);
return $this->results;
} // search
/*!
@function lookup
@discussion this takes a ASIN and looks up the
item in question, possible to pass array
of asin's
*/
function lookup($asin, $type='Music') {
if (is_array($asin)) {
foreach ($asin as $key=>$value) {
$url = $this->base_url . "Service=AWSECommerceService&SubscriptionId=" . $this->token .
"&Operation=ItemLookup&ItemId=" . $key . "&ResponseGroup=Images";
$this->run_search($url);
}
} // if array of asin's
else {
$url = $this->base_url . "Service=AWSECommerceService&SubscriptionId=" . $this->token .
"&Operation=ItemLookup&ItemId=" . $asin . "&ResponseGroup=Images";
$this->run_search($url);
} // else
unset($this->results['ASIN']);
return $this->results;
} // lookup
function start_element($parser, $tag, $attributes) {
if ($tag == "ASIN") {
$this->_sourceTag = $tag;
}
if ($tag == "SmallImage" || $tag == "MediumImage" || $tag == "LargeImage") {
$this->_subTag = $tag;
}
/* If it's in the tag list, don't grab our search results though */
if (strlen($this->_sourceTag)) {
$this->_currentTag = $tag;
}
else {
if($tag != "TotalPages"){
$this->_currentTag = '';
}else{
$this->_currentTag = $tag;
}
}
} // start_element
function cdata($parser, $cdata) {
$tag = $this->_currentTag;
$subtag = $this->_subTag;
$source = $this->_sourceTag;
switch ($tag) {
case 'URL':
$this->results[$source][$subtag] = trim($cdata);
break;
case 'ASIN':
$this->_sourceTag = trim($cdata);
break;
case 'TotalPages':
debug_event('amazon-search-results',"TotalPages= ". trim($cdata),'5');
$this->_maxPage = trim($cdata);
break;
default:
if (strlen($tag)) {
$this->results[$source][$tag] = trim($cdata);
}
break;
} // end switch
} // cdata
function end_element($parser, $tag) {
/* Zero the tag */
$this->_currentTag = '';
} // end_element
} // end AmazonSearch
?>
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