",
"W3C Wordnet" => "http://www.w3.org/2006/03/wn/wn20/instances/wordsense-bank-noun-1.rdf",
"Virtuoso's URI burner" => "http://linkeddata.uriburner.com/about/rdf/http://www.crunchbase.com/financial-organization/andreessen-horowitz",
"DogFood" => "http://data.semanticweb.org/person/abraham-bernstein/rdf",
"Crunchbase (Semsol)" => "http://cb.semsol.org/company/3x-systems"
);
$accept_header = array('Accept' => 'application/rdf+xml');
$options = array(
'return_info' => true,
'headers' => $accept_header
);
$countLastModified = 0;
$countETag = 0;
$countNoCache = 0;
$countPrivateCache = 0;
$countLastModifiedANDETag = 0;
$countCacheControl = 0;
echo "Samples (HTTP response headers)
";
echo "\n| Dataset | Sample | Last-Modified | ETag | Cache-Control | Pragma | Processing Time (s) |
|---|
\n";
foreach($samples as $sample) {
$dataset = array_keys($samples, $sample);
$start = (float) array_sum(explode(' ',microtime()));
$result = load($sample, $options);
$end = (float) array_sum(explode(' ',microtime()));
echo "\n";
echo "| " . $dataset[0] . " | \n";
echo "$sample | \n";
if($result['headers']['Last-Modified']){
echo "" . $result['headers']['Last-Modified'] . " | \n";
$countLastModified++;
}
else {
echo "- | \n";
}
if($result['headers']['ETag']){
echo "" . $result['headers']['ETag']. " | \n";
$countETag++;
}
else {
echo "- | \n";
}
if($result['headers']['Cache-Control']){
echo "" . $result['headers']['Cache-Control']. " | \n";
$countCacheControl++;
$ccHeader = $result['headers']['Cache-Control'];
if($ccHeader == 'no-cache'){
$countNoCache++;
}
if(stristr($ccHeader, 'private') !== FALSE) {
$countPrivateCache++;
}
}
else {
echo "- | \n";
}
if($result['headers']['Pragma']){
echo "" . $result['headers']['Pragma']. " | \n";
}
else {
echo "- | \n";
}
echo "" . sprintf("%.4f", ($end - $start)) . " | ";
echo "
\n";
// extra stats
if($result['headers']['Last-Modified'] && $result['headers']['ETag']){
$countLastModifiedANDETag++;
}
}
echo "\n
\n";
echo "Summary
\n";
$noLastModified = sizeof($samples) - $countLastModified;
$LMratio = round(100*($countLastModified/sizeof($samples)), 1);
echo "\n";
echo ")
";
$noETag = sizeof($samples) - $countETag;
$ETratio = round(100*($countETag/sizeof($samples)), 1);
echo ")
";
echo "
\n";
$noLastModifiedANDETag = sizeof($samples) - $countLastModifiedANDETag;
$LastModifiedANDETagratio = round(100*($countLastModifiedANDETag/sizeof($samples)), 1);
echo "\n";
//echo ")
";
$noCacheControl = sizeof($samples) - $countCacheControl;
$otherCache = $countCacheControl - $countNoCache - $countPrivateCache;
$noCCratio = round(100*($noCacheControl/sizeof($samples)), 1);
$noCacheCCratio = round(100*($countNoCache/sizeof($samples)), 1);
$privateCCratio = round(100*($countPrivateCache/sizeof($samples)), 1);
$otherCCratio = round(100*($otherCache/sizeof($samples)), 1);
echo "|private ($privateCCratio %)|other ($otherCCratio %)| no Cache-Control header ($noCCratio %))
";
echo "
\n";
echo "Total sample size: " . sizeof($samples) . " URIs.
\n";
echo "#Last-Modified: $countLastModified
\n";
echo " #ETag: $countETag
\n";
echo " #(Last-Modified and ETag): $countLastModifiedANDETag
\n";
echo " #Cache-Control: $countCacheControl
\n";
echo " - #no-cache: $countNoCache
\n";
echo " - #private: $countPrivateCache
\n";
?>