function call_method($method, $params)
{
$this->error_code = 0;
$xml = $this->post_request($method, $params);
$impl = new IsterXmlSimpleXMLImpl();
$sxml = $impl->load_string($xml);
$result = array();
$children = $sxml->children();
$result = $this->convert_simplexml_to_array($children[0]);
if ($GLOBALS['facebook_config']['debug']) {
// output the raw xml and its corresponding php object, for debugging:
print '<div style="margin: 10px 30px; padding: 5px; border: 2px solid black; background: gray; color: white; font-size: 12px; font-weight: bold;">';
$this->cur_id++;
print $this->cur_id . ': Called ' . $method . ', show ' . '<a href=# onclick="return toggleDisplay(' . $this->cur_id . ', \'params\');">Params</a> | ' . '<a href=# onclick="return toggleDisplay(' . $this->cur_id . ', \'xml\');">XML</a> | ' . '<a href=# onclick="return toggleDisplay(' . $this->cur_id . ', \'php\');">PHP</a>';
print '<pre id="params' . $this->cur_id . '" style="display: none; overflow: auto;">' . print_r($params, true) . '</pre>';
print '<pre id="xml' . $this->cur_id . '" style="display: none; overflow: auto;">' . htmlspecialchars($xml) . '</pre>';
print '<pre id="php' . $this->cur_id . '" style="display: none; overflow: auto;">' . print_r($result, true) . '</pre>';
print '</div>';
}
if (is_array($result) && isset($result['error_code'])) {
$this->error_code = $result['error_code'];
return null;
}
return $result;
}
/**
* Fetches and parses XML from Amazon for the given query.
* @param string $query Query string containing variables to search Amazon for. Valid variables: $isbn, $title, $author
* @return array Array containing each book's information.
*/
function query_amazon( $query ) {
require_once dirname(__FILE__) . '/sha256.inc.php';
if (!function_exists('hmac'))
{
function hmac($key, $data, $hashfunc='sha256')
{
$blocksize=64;
if (strlen($key) > $blocksize) $key=pack('H*', $hashfunc($key));
$key=str_pad($key, $blocksize, chr(0x00));
$ipad=str_repeat(chr(0x36), $blocksize);
$opad=str_repeat(chr(0x5c), $blocksize);
$hmac = pack('H*', $hashfunc(($key^$opad) . pack('H*', $hashfunc(($key^$ipad) . $data))));
return $hmac;
}
}
global $item, $items;
$options = get_option('nowReadingOptions');
$using_isbn = false;
parse_str($query);
if ( empty($isbn) && empty($title) && empty($author) )
return false;
if ( !empty($isbn) )
$using_isbn = true;
// Our query needs different vars depending on whether or not we're searching by ISBN, so build it here.
if ( $using_isbn ) {
$isbn = preg_replace('#([^0-9x]+)#i', '', $isbn);
$query = "isbn:$isbn";
} else {
$query='';
if ( !empty($title) )
$query = 'title:' . urlencode($title);
if ( !empty($author) )
$query .= 'author:' . urlencode($author);
}
// these items MUST be set in the Options screen
$AWSAccessKeyId = trim($options['AWSAccessKeyId']);
$SecretAccessKey = trim($options['SecretAccessKey']);
# // some paramters
$method = "GET";
$host = "ecs.amazonaws".$options['domain'];
$uri = "/onca/xml";
// additional parameters
$params["Service"] = "AWSECommerceService";
// GMT timestamp
$params["Timestamp"] = gmdate("Y-m-d\TH:i:s\Z");
// API version
$params["Version"] = "2009-03-31";
$params["AssociateTag"] = urlencode($options['associate']);
$params["Power"] = $query;
$params["Operation"] = "ItemSearch";
$params["SearchIndex"] = "Books";
$params["ResponseGroup"] = "Request,Large,Images,AlternateVersions";
$params["AWSAccessKeyId"] = $AWSAccessKeyId;
// Sort paramters
ksort($params);
// re-build the request
$request = array();
foreach ($params as $parameter=>$value)
{
$parameter = str_replace("_", ".", $parameter);
$parameter = str_replace("%7E", "~", rawurlencode($parameter));
$value = str_replace("%7E", "~", rawurlencode($value));
$request[] = $parameter . "=" . $value;
}
$request = implode("&", $request);
$signatureString = $method . chr(10) . $host . chr(10) . $uri . chr(10) . $request;
$signature = urlencode(base64_encode(hmac($SecretAccessKey, $signatureString)));
$request = "http://" . $host . $uri . "?" . $request . "&Signature=" . $signature;
// Fetch the XML using either Snoopy or cURL, depending on our options.
if ( $options['httpLib'] == 'curl' ) {
if ( !function_exists('curl_init') ) {
return new WP_Error('curl-not-installed', __('cURL is not installed correctly.', NRTD));
} else {
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $request);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_USERAGENT, 'Now Reading ' . NOW_READING_VERSION);
curl_setopt($ch, CURLOPT_HEADER, 0);
if ( !empty($options['proxyHost']) ) {
$proxy = $options['proxyHost'];
if ( !empty($options['proxyPort']) ) {
$proxy .= ":{$options['proxyPort']}";
}
curl_setopt($ch, CURLOPT_PROXY, $proxy);
}
$xmlString = curl_exec($ch);
curl_close($ch);
}
} else {
require_once ABSPATH . WPINC . '/class-snoopy.php';
$snoopy = new snoopy;
$snoopy->agent = 'Now Reading Redux' . NOW_READING_VERSION;
if ( !empty($options['proxyHost']) )
$snoopy->proxy_host = $options['proxyHost'];
if ( !empty($options['proxyHost']) && !empty($options['proxyPort']) )
$snoopy->proxy_port = $options['proxyPort'];
$snoopy->fetch($request);
$xmlString = $snoopy->results;
}
if ( empty($xmlString) ) {
do_action('nr_search_error', $query);
echo '
<div id="message" class="error fade">
<p><strong>' . __("Oops!") . '</strong></p>
<p>' . sprintf(__("For some reason, I couldn't search for your book on amazon%s.", NRTD), $options['domain']) . '</p>
<p>' . __("Amazon's Web Services may be down, or there may be a problem with your server configuration.") . '</p>
';
if ( $options['httpLib'] )
echo '<p>' . __("Try changing your HTTP Library setting to <strong>cURL</strong>.", NRTD) . '</p>';
echo '
</div>
';
return false;
}
require_once 'xml/IsterXmlSimpleXMLImpl.php';
$impl = new IsterXmlSimpleXMLImpl;
$xml = $impl->load_string($xmlString);
if ( $options['debugMode'] )
robm_dump("Amazon Search XML:", htmlentities(str_replace(">", ">\n", $xmlString)));
$items = $xml->ItemSearchResponse->Items->children();
if (count($items) == 0)
{
return false;
}
$results = array();
foreach ($items as $item)
{
$attr = $item->ItemAttributes;
if (!$attr)
{
continue;
}
$asin = $item->ASIN->CDATA();
if (empty($asin))
{
continue;
}
// Get full meta-data given the current ISBN. Used to get all editions.
$metaData = getMetadataFromIsbn($asin, $AWSAccessKeyId, $SecretAccessKey, urlencode($options['associate']));
if ($options['debugMode'])
{
robm_dump("Amazon Lookup XML:", htmlentities(str_replace(">", ">\n", $metaData)));
}
$metaDataParser = new IsterXmlSimpleXMLImpl;
$metaDataXml = $metaDataParser->load_string($metaData);
if (isset($metadata->ItemLookupResponse->Items->Request->Errors))
{
continue;//$metadata->ItemLookupResponse->Items->Request->Errors;
}
$editions = $metaDataXml->ItemLookupResponse->Items->children();
if (count($editions) == 0)
{
continue;
}
// For each edition, add an entry.
foreach ($editions as $edition)
{
if (!isset($edition->ASIN))
{
continue;
}
$asin = $edition->ASIN->CDATA();
if (empty($asin))
{
continue;
}
$title = $edition->ItemAttributes->Title->CDATA();
if (empty($title))
{
continue;
}
$author = '';
if (is_array($edition->ItemAttributes->Author))
{
foreach ($edition->ItemAttributes->Author as $a)
{
if (is_object($a))
{
$author .= $a->CDATA() . ', ';
}
}
$author = substr($author, 0, -2);
}
else
{
if (is_object($edition->ItemAttributes->Author))
{
$author = $edition->ItemAttributes->Author->CDATA();
}
}
if (empty($author))
{
$author = apply_filters('default_book_author', 'Unknown');
}
$size = "{$options['imageSize']}Image";
if (empty($item->$size))
{
continue;
}
$image = $item->$size->URL->CDATA();
if (empty($image))
{
$image = get_option('siteurl') . '/wp-content/plugins/now-reading-redux/no-image.png';
}
$binding = '';
if (isset($edition->ItemAttributes->Binding))
{
$binding = $edition->ItemAttributes->Binding->CDATA();
}
$ed = '';
if (isset($edition->ItemAttributes->Edition))
{
$ed = $edition->ItemAttributes->Edition->CDATA();
}
$date = '';
if (isset($edition->ItemAttributes->PublicationDate))
{
$date = $edition->ItemAttributes->PublicationDate->CDATA();
}
$publisher = '';
if (isset($edition->ItemAttributes->Publisher))
{
$publisher = $edition->ItemAttributes->Publisher->CDATA();
}
if ($options['debugMode'])
{
robm_dump("book:", $author, $title, $binding, $ed, $date, $publisher, $asin);
}
$results[] = apply_filters('raw_amazon_results', compact('author', 'title', 'binding', 'ed', 'date', 'publisher', 'image', 'asin'));
}
}
$results = apply_filters('returned_books', $results);
return $results;
}
function getXMLData($search, $exact = false)
{
// Snoopy is used to robot the URL fetching
include_once $include_path . "lib/snoopy.class.php";
$snoopy_retry = 3;
$amazon_key = '19B1FW4R5ABSKBWNV582';
if ($exact) {
$baseSearch = 'http://webservices.amazon.com/onca/xml?Service=AWSECommerceService&ResponseGroup=Large&Operation=ItemLookup&AWSAccessKeyId=' . $amazon_key . '&ItemId=' . $search;
} else {
$search_url = 'http://webservices.amazon.com/onca/xml?Service=AWSECommerceService&ResponseGroup=Large&Operation=ItemSearch&SearchIndex=Music&AWSAccessKeyId=' . $amazon_key;
$baseSearch = $search_url . '&' . $search;
}
$snoopy = new Snoopy();
$snoopy_tries = 0;
while ($snoopy_retry > $snoopy_tries) {
$snoopy->fetch($baseSearch);
$snoopy_tries++;
if ($snoopy->status == 200) {
$xml_content = $snoopy->results;
break;
} else {
if ($snoopy->status) {
print "\n<div width=\"100%\" align=\"center\" style=\"background:#C00000;color:#FFFFFF;padding:3px\"><b>";
print "\nThere was a problem fetching results from Amazon: <font color=\"red\">" . $snoopy->status . " " . $snoopy->error . "\n";
print "\nWe will retry this request " . ($snoopy_retry - $snoopy_tries) . " more times.";
print "\n</font></b></div>";
//print "\n<div width=\"100%\" align=\"center\" style=\"background:#C08000;color:#FFFFFF;padding:3px\">We will retry this request " . $snoopy_retry - $snoopy_tries . " more times.</div>";
} else {
print "<b>There was a fatal error: <font color=\"red\">" . $php_errormsg . "</font></b><br>";
return false;
}
}
}
// Amazon returns XML, so parse it through simpleXML
if (isset($xml_content) && $xml_content != '') {
if (!$test_php4 && extension_loaded('simplexml')) {
$xml = new SimpleXMLElement($xml_content);
} elseif (extension_loaded('xml')) {
if (version_compare('5.0.0', phpversion())) {
print "<div width=\"100%\" align=\"center\" style=\"background:#C08000;color:#FFFFFF;padding:3px\"><b>PHP5 supports SimpleXML in a native library. This function will run much faster if you enable this component on your server.</b></div>";
}
include_once $include_path . "lib/simplexml/IsterXmlSimpleXMLImpl.php";
$parser = new IsterXmlSimpleXMLImpl();
$xml1 = $parser->load_string($xml_content);
$xml = $xml1->ItemSearchResponse;
} else {
print "This metadata system requires PHP with the SimpleXML or plain libexpat XML extension installed.";
exit;
}
if (empty($xml)) {
print "<div width=\"100%\" align=\"center\" style=\"background:#C00000;color:#FFFFFF;padding:3px\"><b>There was a problem fetching results from Amazon: <font color=\"red\">" . $snoopy->status . " " . $snoopy->error . "</font></b></div>";
#print "<div width=\"100%\" align=\"center\" style=\"background:#C00000;color:#FFFFFF;padding:3px\">If you wish, you can report this error to the developer by clicking the following button.";
#print '<form method="POST" action="http://www.darkhart.net/support.php"><input type="hidden" name="subject" value="JZ Custom - XML parse error"><input type="hidden" name="data" value="' . . '"><input type="submit" value="Submit Report"></form></div>';
print "<code>htmlentities({$xml_content})</code>";
return false;
}
}
return $xml;
}
