/**
* Get DAS
*
* @return object
*/
public static function getXmlDas()
{
if (is_null(self::$xmldas)) {
self::$xmldas = SDO_DAS_XML::create(dirname(__FILE__) . '/rss2.0.xsd');
}
return self::$xmldas;
}
/**
* Handle
*
* @param string $calling_component_filename Filename
*
* @return null
*/
public function handle($calling_component_filename)
{
SCA::$logger->log("Entering");
$actions = array('POST' => array('create', 1), 'GET' => array('retrieve', 1), 'PUT' => array('update', 2), 'DELETE' => array('delete', 1));
if (array_key_exists($_SERVER['REQUEST_METHOD'], $actions)) {
$methodWithNumberOfParams = $actions[$_SERVER['REQUEST_METHOD']];
$method = $methodWithNumberOfParams[0];
} else {
//TODO find out correct response
header("HTTP/1.1 404 ");
echo $_SERVER['REQUEST_METHOD'] . " Not Supported.";
return;
}
//*handle situations where we have the id in the url.*/
/**
These look like the variables to use:
[REQUEST_URI] => /Samples/RSS/Contact.php/12
[SCRIPT_NAME] => /Samples/RSS/Contact.php
[PATH_INFO] => /12
*/
/*
* Note, if the PATH_INFO is not working, and you are using Apache 2.0,
* check the AcceptPathInfo directive for php files.
* See http://httpd.apache.org/docs/2.0/mod/core.html#acceptpathinfo
*/
//Set $id - works for non-selector style, but not for selector style.
if (isset($_SERVER['PATH_INFO'])) {
$param = $_SERVER['PATH_INFO'];
//test different length of param
//$param = "/344656";
//TODO: is there a case where there will not be a slash in [PATH_INFO]?
//strip slash
$lengthOfParam = strlen($param);
$id = substr($param, 1, $lengthOfParam);
} else {
if (isset($_GET['id'])) {
$id = $_GET['id'];
//left so that our rewrite test still works
} else {
$id = null;
}
}
try {
//always give the component an sdo, but handle sdo or xml back from it.
if ($method === 'create') {
SCA::$logger->log("{$method} == create");
// Can only do GET (retrieve) on RSS
// return http method not allowed status
header("HTTP/1.1 405");
} else {
if ($method === 'retrieve') {
$call_response = null;
try {
if ($id === null) {
$method = 'enumerate';
}
SCA::$logger->log("Calling {$method} on the RSS service wrapper, passing in the id {$id}");
$class_name = SCA_Helper::guessClassName($calling_component_filename);
$service_component = SCA::createInstance($class_name);
SCA::fillInReferences($service_component);
$call_response = call_user_func_array(array(&$service_component, $method), $id);
SCA::$logger->log("Response from calling the method {$method} is: {$call_response}");
//TODO: make sure these tests reflect the correct return values.
if ($call_response !== null) {
$response_xml;
// Handle the different types of response (SDO, PHP Class, Raw XML)
if ($call_response instanceof SDO_DataObjectImpl) {
//if the thing received is an sdo...
//convert it to xml
$response_xml = SCA_Bindings_Rss_RssDas::toXml($call_response);
} else {
if ($call_response instanceof Channel) {
// TODO: write the mapping from php classes to XML...
SCA::$logger->log("TODO: write the mapping from php rss classes to xml.");
$response_xml = null;
} else {
if (is_string($call_response)) {
$response_xml = $call_response;
}
}
}
header("HTTP/1.1 200");
header("Content-Type: application/xml");
echo $response_xml;
} else {
SCA::$logger->log("Caught call_response is null exception in RSSServer");
//TODO find out the right response
header("HTTP/1.1 500");
//echo "The requested resource <em>$id</em> does not exist on this database";
}
} catch (SCA_ServiceUnavailableException $ex) {
header("HTTP/1.1 503");
} catch (SCA_ConflictException $ex) {
header("HTTP/1.1 409");
} catch (SCA_AuthenticationException $ex) {
header("HTTP/1.1 407");
} catch (SCA_BadRequestException $ex) {
header("HTTP/1.1 400");
} catch (SCA_InternalServerErrorException $ex) {
SCA::$logger->log("Caught SCA_InternalServerErrorException in RSSServer");
header("HTTP/1.1 500");
} catch (SCA_MethodNotAllowedException $ex) {
//note - this one is more likely to be thrown by the server code than the component code.
header("HTTP/1.1 405");
} catch (SCA_UnauthorizedException $ex) {
header("HTTP/1.1 401");
} catch (SCA_RuntimeException $ex) {
SCA::$logger->log("Caught SCA_RuntimeException in RSSServer\n");
header("HTTP/1.1 500");
} catch (Exception $ex) {
SCA::$logger->log("Caught an exception in RSSServer: " . $ex->getMessage() . "\n");
$call_response['error'] = $ex->getMessage();
//TODO find out the right response
header("HTTP/1.1 500");
}
} else {
if ($method === 'update') {
// Can only do GET (retrieve) on RSS
// return http method not allowed status
header("HTTP/1.1 405");
} else {
if ($method === 'delete') {
// Can only do GET (retrieve) on RSS
// return http method not allowed status
header("HTTP/1.1 405");
}
}
}
}
} catch (SCA_MethodNotAllowedException $ex) {
//catch problem finding the method encountered by the service wrapper.
header("HTTP/1.1 405");
} catch (SCA_RuntimeException $ex) {
//TODO: output exceptions correctly.
header("HTTP/1.1 500");
}
return;
}
/**
* Enumerate
*
* @return SDO
*/
public function enumerate()
{
SCA::$logger->log("Entering enumerate()");
//TODO these should all be building a setopts array not sending a lot.
$handle = curl_init($this->target);
curl_setopt($handle, CURLOPT_HEADER, false);
curl_setopt($handle, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($handle, CURLOPT_RETURNTRANSFER, true);
curl_setopt($handle, CURLOPT_HTTPGET, true);
curl_setopt($handle, CURLOPT_ENCODING, '');
curl_setopt($handle, CURLOPT_HEADERFUNCTION, array($this, '_headerCallback'));
$result = curl_exec($handle);
$response_http_code = curl_getinfo($handle, CURLINFO_HTTP_CODE);
SCA::$logger->log("Http response code: {$response_http_code}");
curl_close($handle);
//convert the result into an sdo.
$sdo = SCA_Bindings_Rss_RssDas::fromXml($result);
//TODO: confirm the correct response code for retrieve.
if ($response_http_code != 200) {
switch ($response_http_code) {
// Temporary redirects
case 302:
case 307:
// FOLLOWLOCATION is on, so we should not get here
throw new SCA_RuntimeException('enumerate() status code ' . $response_http_code . ' when 200 expected');
case 503:
//TODO: pick out the message from the response if there is one
//for now just pass back a one liner.
throw new SCA_ServiceUnavailableException("Service Unavailable");
case 409:
throw new SCA_ConflictException("Conflict");
case 407:
throw new SCA_AuthenticationException("Authentication Required");
case 400:
throw new SCA_BadRequestException("Bad Request");
case 500:
throw new SCA_InternalServerErrorException("Internal Server Error");
case 405:
throw new SCA_MethodNotAllowedException("Method Not Allowed");
case 401:
throw new SCA_UnauthorizedException("Unauthorized");
default:
throw new SCA_RuntimeException('enumerate() status code ' . $response_http_code . ' when 200 expected');
}
} else {
return $sdo;
}
}
