I am trying to apply my XSLT stylesheet to Amazon API xml output and display a movie title on the page
This is my XSLT file (amazon.xsl):
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:aws="http://webservices.amazon.com/AWSECommerceService/2011-08-01">
<xsl:output method="xml" version="1.0" omit-xml-declaration="yes" indent="yes" media-type="text/html"/>
<xsl:template match="/">
<xml>
<root>
<xsl:apply-templates select="aws:ItemLookupResponse/aws:Items/aws:Item/aws:ItemAttributes/aws:Title" />
</root>
</xml>
</xsl:template>
<xsl:template match="aws:Title">
<xsl:text>Movie title</xsl:text>
<xsl:value-of select="."/>
</xsl:template>
</xsl:stylesheet>
This is Amazon API XML output:
<ItemLookupResponse xmlns="http://webservices.amazon.com/AWSECommerceService/2011-08-01">
<OperationRequest>
<HTTPHeaders>
<Header Name="UserAgent" Value="Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.22 (KHTML, like Gecko) Chrome/25.0.1364.172 Safari/537.22"/>
</HTTPHeaders>
<RequestId>a1138e89-4335-4650-80f2-641e3c58b623</RequestId>
<Arguments>
<Argument Name="Operation" Value="ItemLookup"/>
<Argument Name="Service" Value="AWSECommerceService"/>
<Argument Name="Signature" Value="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"/>
<Argument Name="AssociateTag" Value="xxxxxxxxxxxxxx"/>
<Argument Name="Version" Value="2011-08-01"/>
<Argument Name="ItemId" Value="B004LWZWGK"/>
<Argument Name="AWSAccessKeyId" Value="xxxxxxxxxxxxxxxxxxxx"/>
<Argument Name="Timestamp" Value="2013-03-21T13:56:55.000Z"/>
<Argument Name="ResponseGroup" Value="Small"/>
</Arguments>
<RequestProcessingTime>0.0189320000000000</RequestProcessingTime>
</OperationRequest>
<Items>
<Item>
<ItemAttributes>
<Title>
The Dark Knight Rises (Blu-ray/DVD Combo+UltraViolet Digital Copy)
</Title>
</ItemAttributes>
</Item>
</Items>
</ItemLookupResponse>
I have found and used the following PHP code to search for the movie title and display it on the page. However, it only displays it in plain text. I would like to apply an XSLT style to it but I don't know how to properly include it in my php code.
If XSLT was used correctly, it would display "Movie title" right above the actual title.
amazon.php
include('aws_signed_request.php');
$public_key = 'XXXXXXXXXXXXXXXXXXXX';
$private_key = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxx';
$associate_tag = 'xxxxxxxxxxxxxxxxxxxxxxxxx';
// generate signed URL
$request = aws_signed_request('co.uk', array(
'Operation' => 'ItemLookup',
'ItemId' => 'B004LWZWGK',
'ResponseGroup' => 'Small'), $public_key, $private_key, $associate_tag);
// do request (you could also use curl etc.)
$response = @file_get_contents($request);
if ($response === FALSE) {
echo "Request failed.
";
} else {
// parse XML
$xsl = new DOMDocument;
$xsl->load('amazon.xsl');
$proc = new XSLTProcessor();
$proc->importStyleSheet($xsl);
$doc = DOMDocument::loadXML($response);
$transform = $proc->transformToXML($doc);
$pxml = simplexml_load_string($transform);
if ($pxml === FALSE) {
echo "Response could not be parsed.
";
} else {
if (isset($pxml->Items->Item->ItemAttributes->Title)) {
echo $pxml->Items->Item->ItemAttributes->Title, "
";
}
}
}
*aws_signed_request.php*
function aws_signed_request($region, $params, $public_key, $private_key, $associate_tag=NULL, $version='2011-08-01')
{
/*
Parameters:
$region - the Amazon(r) region (ca,com,co.uk,de,fr,co.jp)
$params - an array of parameters, eg. array("Operation"=>"ItemLookup",
"ItemId"=>"B000X9FLKM", "ResponseGroup"=>"Small")
$public_key - your "Access Key ID"
$private_key - your "Secret Access Key"
$version (optional)
*/
// some paramters
$method = 'GET';
$host = 'webservices.amazon.'.$region;
$uri = '/onca/xml';
// additional parameters
$params['Service'] = 'AWSECommerceService';
$params['AWSAccessKeyId'] = $public_key;
// GMT timestamp
$params['Timestamp'] = gmdate('Y-m-d\TH:i:s\Z');
// API version
$params['Version'] = $version;
if ($associate_tag !== NULL) {
$params['AssociateTag'] = $associate_tag;
}
// sort the parameters
ksort($params);
// create the canonicalized query
$canonicalized_query = array();
foreach ($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);
// create the string to sign
$string_to_sign = $method."
".$host."
".$uri."
".$canonicalized_query;
// calculate HMAC with SHA256 and base64-encoding
$signature = base64_encode(hash_hmac('sha256', $string_to_sign, $private_key, TRUE));
// encode the signature for the request
$signature = str_replace('%7E', '~', rawurlencode($signature));
// create request
$request = 'http://'.$host.$uri.'?'.$canonicalized_query.'&Signature='.$signature;
return $request;
}
I know it's a lot of code, but everything in PHP works perfectly fine and I do get a movie title displayed on the page. I just want to apply my XSLT stylesheet to it as well. I am very new to PHP and cannot figure out how to do it properly.
To answer your question from the comments, here is how you could generate an HTML page from that input:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:aws="http://webservices.amazon.com/AWSECommerceService/2011-08-01"
exclude-result-prefixes="aws">
<xsl:output method="html" indent="yes" omit-xml-declaration="yes"/>
<xsl:template match="/">
<html>
<head>
<title></title>
</head>
<body>
<xsl:apply-templates />
</body>
</html>
</xsl:template>
<xsl:template match="aws:Title">
<h1>
<xsl:text>Movie Title</xsl:text>
</h1>
<xsl:value-of select="." />
</xsl:template>
<xsl:template match="text()" />
</xsl:stylesheet>
When run on your sample input, this produces:
<html>
<head>
<META http-equiv="Content-Type" content="text/html; charset=utf-8">
<title></title>
</head>
<body>
<h1>Movie Title</h1>
The Dark Knight Rises (Blu-ray/DVD Combo+UltraViolet Digital Copy)
</body>
</html>
If you just want to generate an HTML snipped to add to a larger page that you are displaying, you could just use this:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:aws="http://webservices.amazon.com/AWSECommerceService/2011-08-01"
exclude-result-prefixes="aws">
<xsl:output method="html" indent="yes" omit-xml-declaration="yes"/>
<xsl:template match="aws:Title">
<div>
<h1>
<xsl:text>Movie Title</xsl:text>
</h1>
<xsl:value-of select="." />
</div>
</xsl:template>
<xsl:template match="text()" />
</xsl:stylesheet>
which produces:
<h1>Movie Title</h1>
The Dark Knight Rises (Blu-ray/DVD Combo+UltraViolet Digital Copy)
You have created the processor and imported the stylesheet on lines 6 & 7 in amazon.php but you still need to apply it using XSLTProcessor::transformToXML
// parse XML
$doc = DOMDocument::loadXML($response);
$transform = $proc->transformToXML($doc);
$pxml = simplexml_load_string($transform);