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<?php
/**
* ownCloud
*
* @author Frank Karlitschek
* @author Michael Gapczynski
* @copyright 2012 Frank Karlitschek frank@owncloud.org
* @copyright 2012 Michael Gapczynski mtgap@owncloud.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
*
* You should have received a copy of the GNU Affero General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
/**
* Class to handle open collaboration services API requests
*
*/
class OC_OCS {
/**
* reads input date from get/post/cookies and converts the date to a special data-type
*
* @param string $method HTTP method to read the key from
* @param string $key Parameter to read
* @param string $type Variable type to format data
* @param string $default Default value to return if the key is not found
* @return string Data or if the key is not found and no default is set it will exit with a 400 Bad request
*/
public static function readData($method, $key, $type = 'raw', $default = null) {
$data = false;
if ($method == 'get') {
if (isset($_GET[$key])) {
$data = $_GET[$key];
} else if (isset($default)) {
return $default;
} else {
$data = false;
}
} else if ($method == 'post') {
if (isset($_POST[$key])) {
$data = $_POST[$key];
} else if (isset($default)) {
return $default;
} else {
$data = false;
}
}
if ($data === false) {
echo self::generateXml('', 'fail', 400, 'Bad request. Please provide a valid '.$key);
exit();
} else {
// NOTE: Is the raw type necessary? It might be a little risky without sanitization
if ($type == 'raw') return $data;
elseif ($type == 'text') return OC_Util::sanitizeHTML($data);
elseif ($type == 'int') return (int) $data;
elseif ($type == 'float') return (float) $data;
elseif ($type == 'array') return OC_Util::sanitizeHTML($data);
else return OC_Util::sanitizeHTML($data);
}
}
public static function notFound() {
if($_SERVER['REQUEST_METHOD'] == 'GET') {
$method='get';
}elseif($_SERVER['REQUEST_METHOD'] == 'PUT') {
$method='put';
parse_str(file_get_contents("php://input"), $put_vars);
}elseif($_SERVER['REQUEST_METHOD'] == 'POST') {
$method='post';
}else{
echo('internal server error: method not supported');
exit();
}
$format = self::readData($method, 'format', 'text', '');
$txt='Invalid query, please check the syntax. API specifications are here:'
.' http://www.freedesktop.org/wiki/Specifications/open-collaboration-services. DEBUG OUTPUT:'."\n";
$txt.=OC_OCS::getDebugOutput();
echo(OC_OCS::generateXml($format, 'failed', 999, $txt));
}
/**
* generated some debug information to make it easier to find faild API calls
* @return string data string
*/
private static function getDebugOutput() {
$txt='';
$txt.="debug output:\n";
if(isset($_SERVER['REQUEST_METHOD'])) $txt.='http request method: '.$_SERVER['REQUEST_METHOD']."\n";
if(isset($_SERVER['REQUEST_URI'])) $txt.='http request uri: '.$_SERVER['REQUEST_URI']."\n";
if(isset($_GET)) foreach($_GET as $key=>$value) $txt.='get parameter: '.$key.'->'.$value."\n";
if(isset($_POST)) foreach($_POST as $key=>$value) $txt.='post parameter: '.$key.'->'.$value."\n";
return($txt);
}
/**
* generates the xml or json response for the API call from an multidimenional data array.
* @param string $format
* @param string $status
* @param string $statuscode
* @param string $message
* @param array $data
* @param string $tag
* @param string $tagattribute
* @param int $dimension
* @param int|string $itemscount
* @param int|string $itemsperpage
* @return string xml/json
*/
private static function generateXml($format, $status, $statuscode,
$message, $data=array(), $tag='', $tagattribute='', $dimension=-1, $itemscount='', $itemsperpage='') {
if($format=='json') {
$json=array();
$json['status']=$status;
$json['statuscode']=$statuscode;
$json['message']=$message;
$json['totalitems']=$itemscount;
$json['itemsperpage']=$itemsperpage;
$json['data']=$data;
return(json_encode($json));
}else{
$txt='';
$writer = xmlwriter_open_memory();
xmlwriter_set_indent( $writer, 2 );
xmlwriter_start_document($writer );
xmlwriter_start_element($writer, 'ocs');
xmlwriter_start_element($writer, 'meta');
xmlwriter_write_element($writer, 'status', $status);
xmlwriter_write_element($writer, 'statuscode', $statuscode);
xmlwriter_write_element($writer, 'message', $message);
if($itemscount<>'') xmlwriter_write_element($writer, 'totalitems', $itemscount);
if(!empty($itemsperpage)) xmlwriter_write_element($writer, 'itemsperpage', $itemsperpage);
xmlwriter_end_element($writer);
if($dimension=='0') {
// 0 dimensions
xmlwriter_write_element($writer, 'data', $data);
}elseif($dimension=='1') {
xmlwriter_start_element($writer, 'data');
foreach($data as $key=>$entry) {
xmlwriter_write_element($writer, $key, $entry);
}
xmlwriter_end_element($writer);
}elseif($dimension=='2') {
xmlwriter_start_element($writer, 'data');
foreach($data as $entry) {
xmlwriter_start_element($writer, $tag);
if(!empty($tagattribute)) {
xmlwriter_write_attribute($writer, 'details', $tagattribute);
}
foreach($entry as $key=>$value) {
if(is_array($value)) {
foreach($value as $k=>$v) {
xmlwriter_write_element($writer, $k, $v);
}
} else {
xmlwriter_write_element($writer, $key, $value);
}
}
xmlwriter_end_element($writer);
}
xmlwriter_end_element($writer);
}elseif($dimension=='3') {
xmlwriter_start_element($writer, 'data');
foreach($data as $entrykey=>$entry) {
xmlwriter_start_element($writer, $tag);
if(!empty($tagattribute)) {
xmlwriter_write_attribute($writer, 'details', $tagattribute);
}
foreach($entry as $key=>$value) {
if(is_array($value)) {
xmlwriter_start_element($writer, $entrykey);
foreach($value as $k=>$v) {
xmlwriter_write_element($writer, $k, $v);
}
xmlwriter_end_element($writer);
} else {
xmlwriter_write_element($writer, $key, $value);
}
}
xmlwriter_end_element($writer);
}
xmlwriter_end_element($writer);
}elseif($dimension=='dynamic') {
xmlwriter_start_element($writer, 'data');
OC_OCS::toxml($writer, $data, 'comment');
xmlwriter_end_element($writer);
}
xmlwriter_end_element($writer);
xmlwriter_end_document( $writer );
$txt.=xmlwriter_output_memory( $writer );
unset($writer);
return($txt);
}
}
/**
* @param resource $writer
* @param array $data
* @param string $node
*/
public static function toXml($writer, $data, $node) {
foreach($data as $key => $value) {
if (is_numeric($key)) {
$key = $node;
}
if (is_array($value)) {
xmlwriter_start_element($writer, $key);
OC_OCS::toxml($writer, $value, $node);
xmlwriter_end_element($writer);
}else{
xmlwriter_write_element($writer, $key, $value);
}
}
}
}
|
