/**
* Takes care of JSON rendering for the REST-based API. We do this ourselves
* so that we can properly handle our special quirks like invisibility.
*
* @param $object object to be serialized by json encoding
* @return string representing serialized form of $object
*/
function api_json2_render_object($object)
{
$json = '';
if ($object instanceof FQLCantSee) {
$json .= 'null';
} else {
if (is_array($object)) {
$list = key($object) === 0;
$json .= $list ? '[' : '{';
if (!empty($object)) {
$values = array();
foreach ($object as $k => $v) {
$val = '';
if (!$list) {
$val .= json_encode($k) . ':';
}
$val .= api_json2_render_object($v);
$values[] = $val;
}
$json .= implode(',', $values);
}
$json .= $list ? ']' : '}';
} else {
if (is_object($object)) {
$json .= '{';
$values = array();
foreach ($object as $k => $v) {
if (isset($v)) {
$values[] = json_encode($k) . ':' . api_json2_render_object($v);
}
}
$json .= implode(',', $values);
$json .= '}';
} else {
$json .= json_encode($object);
}
}
}
return $json;
}
private function process_request($request)
{
global $API_DOMAIN, $API_DOMAIN_DOT_SUFFIX;
$app_id = $this->app_id;
$method = $request['method'];
$callback = false;
$serialized_result = '';
// Initialize result
$result = array();
// Fix method name
if (starts_with($method, $API_DOMAIN . '.')) {
$method = substr($method, 9);
}
// Replace periods with underscores in method name
$method_underscore = str_replace('.', '_', $method);
$ec = $this->check_throttle($method_underscore, $request);
if ($ec !== API_EC_SUCCESS) {
$msg = $api_error_descriptions[$ec];
if ($ec === API_EC_BAD_IP) {
$msg .= ' (ip was: ' . $_SERVER['REMOTE_ADDR'] . ')';
}
throw new api10_FacebookApiException(array('error_code' => $ec, 'error_msg' => $msg));
}
$impl = new FacebookApi10Implementation($app_id, $this->user_id, $this->session_key, $this->format);
$api = new FacebookApi10Rest($impl);
// Check that the method is valid
if (!method_exists($api, $method_underscore) || !method_exists($impl, $method_underscore) || !api_can_call_method($app_id, $method_underscore)) {
$ec = api10_FacebookApiErrorCode::API_EC_METHOD;
throw new api10_FacebookApiException(array('error_code' => $ec, 'error_msg' => $GLOBALS['api_error_descriptions'][$ec]));
} else {
// Call the method and catch any exceptions
$result = $api->{$method_underscore}($request);
}
switch ($this->format) {
case 'manual':
print api_xml_render_manual_error($ec, $msg, $request);
break;
case 'xml':
// Prepare the XML response
$xml_memory = xmlwriter_open_memory();
xmlwriter_set_indent($xml_memory, true);
xmlwriter_set_indent_string($xml_memory, ' ');
xmlwriter_start_document($xml_memory, API_VERSION_10, 'UTF-8');
if ($result instanceof Exception) {
$name = 'error_response';
} else {
$name = $method_underscore . '_response';
}
$attrs = array();
// FBOPEN:NOTE here, if you are not publishing your own .xsd, to use 'facebook.com' instead
// of $API_DOMAIN_DOT_SUFFIX
$attrs['xmlns'] = 'http://api.' . $API_DOMAIN_DOT_SUFFIX . '/' . API_VERSION_10 . '/';
$attrs['xmlns:xsi'] = 'http://www.w3.org/2001/XMLSchema-instance';
if ($method_underscore != 'fql_query') {
$attrs['xsi:schemaLocation'] = 'http://api.' . $API_DOMAIN_DOT_SUFFIX . '/' . API_VERSION_10 . '/ http://api.' . $API_DOMAIN_DOT_SUFFIX . '/' . API_VERSION_10 . '/facebook.xsd';
}
if (is_array($result) && isset($result[0]) && $result[0] instanceof xml_element) {
$attrs['list'] = 'true';
api_xml3_render_object($xml_memory, new xml_element($name, $result, $attrs));
} else {
api_xml2_render_object($xml_memory, $name, $result, $attrs);
}
xmlwriter_end_document($xml_memory);
// Write XML response
$xml = xmlwriter_output_memory($xml_memory, true);
if ($callback) {
$xml = addslashes($xml);
$xml = str_replace("\n", '\\n', $xml);
$serialized_result = $callback . '(\'' . $xml . '\');';
} else {
$serialized_result = $xml;
}
break;
case 'json':
$json = api_json2_render_object($result);
if ($callback) {
$serialized_result = $callback . '(' . $json . ');';
} else {
$serialized_result = $json;
}
break;
}
return $serialized_result;
}
if ($method_underscore != 'fql_query') {
$attrs['xsi:schemaLocation'] = 'http://api.' . $API_DOMAIN_DOT_SUFFIX . '/' . $version . '/ http://api.' . $API_DOMAIN_DOT_SUFFIX . '/' . $version . '/facebook.xsd';
}
if (is_array($result) && isset($result[0]) && $result[0] instanceof xml_element) {
$attrs['list'] = 'true';
api_xml3_render_object($xml_memory, new xml_element($name, $result, $attrs));
} else {
api_xml2_render_object($xml_memory, $name, $result, $attrs);
}
break;
}
xmlwriter_end_document($xml_memory);
// Write XML response
$xml = xmlwriter_output_memory($xml_memory, true);
if ($req_callback) {
$xml = addslashes($xml);
$xml = str_replace("\n", '\\n', $xml);
echo $req_callback . '(\'' . $xml . '\');';
} else {
echo $xml;
}
break;
case 'json':
$json = api_json2_render_object($result);
if ($req_callback) {
echo $req_callback . '(' . $json . ');';
} else {
echo $json;
}
break;
}
