// SPARQL server did not respond, send a 503.
header("HTTP/1.1 503 Service Unavailable");
readfile("errors/503.html");
}
die;
} else {
// Check that the requested resource exists
$query = 'SELECT ?type WHERE { <' . $bases[$_GET["src"]] . $_GET["q"] . '> a ?type }';
$res = @file_get_contents(ENDPOINT . '?query=' . urlencode($query));
if (1 == preg_match("/<results>\\s*<\\/results>/", $res)) {
header("HTTP/1.1 404 Not Found");
readfile("http://tw.rpi.edu/web/404notfound");
die;
}
// Obtain best mime type
$mime = getBestSupportedMimeType(array("application/rdf+xml", "text/html", "application/xhtml+xml", "text/n3", "text/plain"));
fprintf($logger, "mime = {$mime}\n");
if ($mime == "application/rdf+xml") {
// Handle application/rdf+xml Mime Type
if ($output == "rdf") {
// output=rdf, so the extension on the URI was .rdf
// Set content type and DESCRIBE the resource
header("Content-Type: application/rdf+xml");
$query = 'DESCRIBE <' . $bases[$_GET["src"]] . $_GET["q"] . '>';
if (FALSE === @readfile(ENDPOINT . "?query=" . urlencode($query))) {
// SPARQL endpoint did not respond, send 503
header("HTTP/1.1 503 Service Unavailable");
readfile("errors/503.html");
die;
}
} else {
}
// Perform content negotiation
if (!isset($_GET['uri'])) {
header('HTTP/1.0 404 Not Found');
echo "<h1>404 Not Found</h1>";
echo "No uri";
echo "The page that you have requested could not be found.";
exit;
}
if (isset($_GET['type'])) {
$type = $_GET['type'];
if ($type != 'rdf' && $type != 'ttl' && $type != 'nt' && $type != 'html') {
$type = 'html';
}
} else {
$accept_type = getBestSupportedMimeType(array('application/rdf+xml', 'text/turtle', 'application/xhtml+xml', 'text/html', 'text/plain'));
if ($accept_type == 'application/rdf+xml') {
$type = 'rdf';
} elseif ($accept_type == 'text/turtle') {
$type = 'ttl';
} elseif ($accept_type == 'text/plain') {
$type = 'nt';
} else {
$type = 'html';
}
}
$prefix = "http://lemon-model/net/lexica/de-gaap/en";
if (file_exists($_GET['uri'] . "." . $type)) {
include $_GET['uri'] . "." . $type;
exit;
} else {
echo "<td><a href=\"" . $uri . "\">" . $name . "</a></td>";
echo "<td><a href=\"" . $doc["creator"] . "\">" . $doc["first"] . " " . $doc["last"] . "</a></td>";
$time = strtotime($doc["modified"]);
echo "<td>" . date("h:i a \\o\\n M j, Y", $time) . "</td>";
$time = strtotime($doc["created"]);
echo "<td>" . date("h:i a \\o\\n M j, Y", $time) . "</td>";
echo "</tr>";
}
?>
</table>
<?php
} else {
// Handle GET method. For now we don't support any other method
if ($_SERVER["REQUEST_METHOD"] == "GET") {
// Obtain best possible Accept type
$type = getBestSupportedMimeType(array("application/rdf+xml", "*/*"));
$fileType = exec("file -biL 'files/" . $requestedFile . "'");
if ($type == "application/rdf+xml" || isset($_GET["mode"]) && $_GET["mode"] == "rdf") {
// Handle application/rdf+xml as a separate condition
$query = "";
// Test if this is the 'current' symlink, look up the original file
// and use it as the URI in the SPARQL request
if (is_link('files/' . $requestedFile)) {
$requestedFile = readlink('files/' . $requestedFile);
$perl = "/" . preg_replace("/\\//", "\\/", getRoot()) . "files\\//";
$requestedFile = preg_replace($perl, "", $requestedFile);
}
// Build the SPARQL query
$base = getBase();
$query = "PREFIX dc: <http://purl.org/dc/terms/> DESCRIBE <{$base}" . $requestedFile . "> ?x WHERE { <{$base}" . $requestedFile . "> dc:creator ?x }";
// Return SPARQL result