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nextcloud/lib/ocs.php

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<?php
/**
* ownCloud
*
* @author Frank Karlitschek
* @copyright 2010 Frank Karlitschek karlitschek@kde.org
*
* 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 variable $key
* @param variable-type $type
* @param priority $getpriority
* @param default $default
* @return data
*/
public static function readData($key,$type='raw',$getpriority=false,$default='') {
if($getpriority) {
if(isset($_GET[$key])) {
$data=$_GET[$key];
} elseif(isset($_POST[$key])) {
$data=$_POST[$key];
} else {
if($default=='') {
if(($type=='int') or ($type=='float')) $data=0; else $data='';
} else {
$data=$default;
}
}
} else {
if(isset($_POST[$key])) {
$data=$_POST[$key];
} elseif(isset($_GET[$key])) {
$data=$_GET[$key];
} elseif(isset($_COOKIE[$key])) {
$data=$_COOKIE[$key];
} else {
if($default=='') {
if(($type=='int') or ($type=='float')) $data=0; else $data='';
} else {
$data=$default;
}
}
}
if($type=='raw') return($data);
elseif($type=='text') return(addslashes(strip_tags($data)));
elseif($type=='int') { $data = (int) $data; return($data); }
elseif($type=='float') { $data = (float) $data; return($data); }
elseif($type=='array') { $data = $data; return($data); }
}
/**
main function to handle the REST request
**/
public static function handle() {
// overwrite the 404 error page returncode
header("HTTP/1.0 200 OK");
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();
}
// preprocess url
$url=$_SERVER['REQUEST_URI'];
if(substr($url,(strlen($url)-1))<>'/') $url.='/';
$ex=explode('/',$url);
$paracount=count($ex);
// eventhandler
// CONFIG
// apiconfig - GET - CONFIG
if(($method=='get') and (strtolower($ex[$paracount-3])=='v1.php') and (strtolower($ex[$paracount-2])=='config')){
$format=OC_OCS::readdata('format','text');
OC_OCS::apiconfig($format);
// PERSON
// personcheck - POST - PERSON/CHECK
}elseif(($method=='post') and (strtolower($ex[$paracount-4])=='v1.php') and (strtolower($ex[$paracount-3])=='person') and (strtolower($ex[$paracount-2])=='check')){
$format=OC_OCS::readdata('format','text');
$login=OC_OCS::readdata('login','text');
$passwd=OC_OCS::readdata('password','text');
OC_OCS::personcheck($format,$login,$passwd);
// ACTIVITY
// activityget - GET ACTIVITY page,pagesize als urlparameter
}elseif(($method=='get') and (strtolower($ex[$paracount-3])=='v1.php')and (strtolower($ex[$paracount-2])=='activity')){
$format=OC_OCS::readdata('format','text');
$page=OC_OCS::readdata('page','int');
$pagesize=OC_OCS::readdata('pagesize','int');
if($pagesize<1 or $pagesize>100) $pagesize=10;
OC_OCS::activityget($format,$page,$pagesize);
// activityput - POST ACTIVITY
}elseif(($method=='post') and (strtolower($ex[$paracount-3])=='v1.php')and (strtolower($ex[$paracount-2])=='activity')){
$format=OC_OCS::readdata('format','text');
$message=OC_OCS::readdata('message','text');
OC_OCS::activityput($format,$message);
// PRIVATEDATA
// get - GET DATA
}elseif(($method=='get') and (strtolower($ex[$paracount-4])=='v1.php')and (strtolower($ex[$paracount-2])=='getattribute')){
$format=OC_OCS::readdata('format','text');
OC_OCS::privateDataGet($format);
}elseif(($method=='get') and (strtolower($ex[$paracount-5])=='v1.php')and (strtolower($ex[$paracount-3])=='getattribute')){
$format=OC_OCS::readdata('format','text');
$app=$ex[$paracount-2];
OC_OCS::privateDataGet($format, $app);
}elseif(($method=='get') and (strtolower($ex[$paracount-6])=='v1.php')and (strtolower($ex[$paracount-4])=='getattribute')){
$format=OC_OCS::readdata('format','text');
$key=$ex[$paracount-2];
$app=$ex[$paracount-3];
OC_OCS::privateDataGet($format, $app,$key);
// set - POST DATA
}elseif(($method=='post') and (strtolower($ex[$paracount-6])=='v1.php')and (strtolower($ex[$paracount-4])=='setattribute')){
$format=OC_OCS::readdata('format','text');
$key=$ex[$paracount-2];
$app=$ex[$paracount-3];
$value=OC_OCS::readdata('value','text');
OC_OCS::privatedataset($format, $app, $key, $value);
// delete - POST DATA
}elseif(($method=='post') and (strtolower($ex[$paracount-6])=='v1.php')and (strtolower($ex[$paracount-4])=='deleteattribute')){
$format=OC_OCS::readdata('format','text');
$key=$ex[$paracount-2];
$app=$ex[$paracount-3];
OC_OCS::privatedatadelete($format, $app, $key);
}else{
$format=OC_OCS::readdata('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));
}
exit();
}
/**
* generated some debug information to make it easier to find faild API calls
* @return debug 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);
}
/**
* checks if the user is authenticated
* checks the IP whitlist, apikeys and login/password combination
* if $forceuser is true and the authentication failed it returns an 401 http response.
* if $forceuser is false and authentification fails it returns an empty username string
* @param bool $forceuser
* @return username string
*/
private static function checkPassword($forceuser=true) {
//valid user account ?
if(isset($_SERVER['PHP_AUTH_USER'])) $authuser=$_SERVER['PHP_AUTH_USER']; else $authuser='';
if(isset($_SERVER['PHP_AUTH_PW'])) $authpw=$_SERVER['PHP_AUTH_PW']; else $authpw='';
if(empty($authuser)) {
if($forceuser){
header('WWW-Authenticate: Basic realm="your valid user account or api key"');
header('HTTP/1.0 401 Unauthorized');
exit;
}else{
$identifieduser='';
}
}else{
if(!OC_USER::login($authuser,$authpw)){
if($forceuser){
header('WWW-Authenticate: Basic realm="your valid user account or api key"');
header('HTTP/1.0 401 Unauthorized');
exit;
}else{
$identifieduser='';
}
}else{
$identifieduser=$authuser;
}
}
return($identifieduser);
}
/**
* 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 $itemscount
* @param int $itemsperpage
* @return string xml/json
*/
private static function generateXml($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($txt);
}
}
public static function toXml($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);
}
}
}
/**
* return the config data of this server
* @param string $format
* @return string xml/json
*/
private static function apiConfig($format) {
$user=OC_OCS::checkpassword(false);
$url=substr($_SERVER['HTTP_HOST'].$_SERVER['SCRIPT_NAME'],0,-11).'';
$xml['version']='1.5';
$xml['website']='ownCloud';
$xml['host']=$_SERVER['HTTP_HOST'];
$xml['contact']='';
$xml['ssl']='false';
echo(OC_OCS::generatexml($format,'ok',100,'',$xml,'config','',1));
}
/**
* check if the provided login/apikey/password is valid
* @param string $format
* @param string $login
* @param string $passwd
* @return string xml/json
*/
private static function personCheck($format,$login,$passwd) {
if($login<>''){
if(OC_USER::login($login,$passwd)){
$xml['person']['personid']=$login;
echo(OC_OCS::generatexml($format,'ok',100,'',$xml,'person','check',2));
}else{
echo(OC_OCS::generatexml($format,'failed',102,'login not valid'));
}
}else{
echo(OC_OCS::generatexml($format,'failed',101,'please specify all mandatory fields'));
}
}
// ACTIVITY API #############################################
/**
* get my activities
* @param string $format
* @param string $page
* @param string $pagesize
* @return string xml/json
*/
private static function activityGet($format,$page,$pagesize) {
global $CONFIG_DBTABLEPREFIX;
$user=OC_OCS::checkpassword();
$result = OC_DB::query("select count(*) as co from {$CONFIG_DBTABLEPREFIX}log");
$entry=$result->fetchRow();
$totalcount=$entry['co'];
OC_DB::free_result($result);
$result = OC_DB::select("select id,timestamp,user,type,message from {$CONFIG_DBTABLEPREFIX}log order by timestamp desc limit " . ($page*$pagesize) . ",$pagesize");
$itemscount=count($result);
$url='http://'.substr($_SERVER['HTTP_HOST'].$_SERVER['SCRIPT_NAME'],0,-11).'';
$xml=array();
foreach($result as $i=>$log) {
$xml[$i]['id']=$log['id'];
$xml[$i]['personid']=$log['user'];
$xml[$i]['firstname']=$log['user'];
$xml[$i]['lastname']='';
$xml[$i]['profilepage']=$url;
$pic=$url.'/img/owncloud-icon.png';
$xml[$i]['avatarpic']=$pic;
$xml[$i]['timestamp']=date('c',$log['timestamp']);
$xml[$i]['type']=1;
$xml[$i]['message']=OC_LOG::$TYPE[$log['type']].' '.strip_tags($log['message']);
$xml[$i]['link']=$url;
}
$txt=OC_OCS::generatexml($format,'ok',100,'',$xml,'activity','full',2,$totalcount,$pagesize);
echo($txt);
}
/**
* submit a activity
* @param string $format
* @param string $message
* @return string xml/json
*/
private static function activityPut($format,$message) {
// not implemented in ownCloud
$user=OC_OCS::checkpassword();
echo(OC_OCS::generatexml($format,'ok',100,''));
}
// PRIVATEDATA API #############################################
/**
* get private data and create the xml for ocs
* @param string $format
* @param string $app
* @param string $key
* @return string xml/json
*/
private static function privateDataGet($format,$app="",$key="") {
$user=OC_OCS::checkpassword();
$result=OC_OCS::getData($user,$app,$key);
$xml=array();
foreach($result as $i=>$log) {
$xml[$i]['key']=$log['key'];
$xml[$i]['app']=$log['app'];
$xml[$i]['value']=$log['value'];
$xml[$i]['timestamp']=$log['timestamp'];
}
$txt=OC_OCS::generatexml($format, 'ok', 100, '', $xml, 'privatedata', 'full', 2, count($xml), 0);//TODO: replace 'privatedata' with 'attribute' once a new libattice has been released that works with it
echo($txt);
}
/**
* set private data referenced by $key to $value and generate the xml for ocs
* @param string $format
* @param string $app
* @param string $key
* @param string $value
* @return string xml/json
*/
private static function privateDataSet($format, $app, $key, $value) {
$user=OC_OCS::checkpassword();
if(OC_OCS::setData($user,$app,$key,$value)){
echo(OC_OCS::generatexml($format,'ok',100,''));
}
}
/**
* delete private data referenced by $key and generate the xml for ocs
* @param string $format
* @param string $app
* @param string $key
* @return string xml/json
*/
private static function privateDataDelete($format, $app, $key) {
if($key=="" or $app==""){
return; //key and app are NOT optional here
}
$user=OC_OCS::checkpassword();
if(OC_OCS::deleteData($user,$app,$key)){
echo(OC_OCS::generatexml($format,'ok',100,''));
}
}
/**
* get private data
* @param string $user
* @param string $app
* @param string $key
* @param bool $like use LIKE instead of = when comparing keys
* @return array
*/
public static function getData($user,$app="",$key="",$like=false) {
global $CONFIG_DBTABLEPREFIX;
$user=OC_DB::escape($user);
$key=OC_DB::escape($key);
$app=OC_DB::escape($app);
$key="$user::$key";//ugly hack for the sake of keeping database scheme compatibiliy, needs to be replaced with a seperate user field the next time we break db compatibiliy
$compareFunction=($like)?'LIKE':'=';
if($app){
if (!trim($key)) {
$result = OC_DB::select("select app, `key`,value,`timestamp` from {$CONFIG_DBTABLEPREFIX}privatedata where app='$app' order by `timestamp` desc");
} else {
$result = OC_DB::select("select app, `key`,value,`timestamp` from {$CONFIG_DBTABLEPREFIX}privatedata where app='$app' and `key` $compareFunction '$key' order by `timestamp` desc");
}
}else{
if (!trim($key)) {
$result = OC_DB::select("select app, `key`,value,`timestamp` from {$CONFIG_DBTABLEPREFIX}privatedata order by `timestamp` desc");
} else {
$result = OC_DB::select("select app, `key`,value,`timestamp` from {$CONFIG_DBTABLEPREFIX}privatedata where `key` $compareFunction '$key' order by `timestamp` desc");
}
}
$result=self::trimKeys($result,$user);
return $result;
}
/**
* set private data referenced by $key to $value
* @param string $user
* @param string $app
* @param string $key
* @param string $value
* @return bool
*/
public static function setData($user, $app, $key, $value) {
global $CONFIG_DBTABLEPREFIX;
$app=OC_DB::escape($app);
$key=OC_DB::escape($key);
$user=OC_DB::escape($user);
$value=OC_DB::escape($value);
$key="$user::$key";//ugly hack for the sake of keeping database scheme compatibiliy
//TODO: prepared statements, locking tables, fancy stuff, error checking/handling
$result=OC_DB::select("select count(*) as co from {$CONFIG_DBTABLEPREFIX}privatedata where `key` = '$key' and app = '$app'");
$totalcount=$result[0]['co'];
if ($totalcount != 0) {
$result = OC_DB::query("update {$CONFIG_DBTABLEPREFIX}privatedata set value='$value', `timestamp` = now() where `key` = '$key' and app = '$app'");
} else {
$result = OC_DB::query("insert into {$CONFIG_DBTABLEPREFIX}privatedata(app, `key`, value, `timestamp`) values('$app', '$key', '$value', now())");
}
if (PEAR::isError($result)){
$entry='DB Error: "'.$result->getMessage().'"<br />';
error_log($entry);
return false;
}else{
return true;
}
}
/**
* delete private data referenced by $key
* @param string $user
* @param string $app
* @param string $key
* @return string xml/json
*/
public static function deleteData($user, $app, $key) {
global $CONFIG_DBTABLEPREFIX;
$app=OC_DB::escape($app);
$key=OC_DB::escape($key);
$user=OC_DB::escape($user);
$key="$user::$key";//ugly hack for the sake of keeping database scheme compatibiliy
//TODO: prepared statements, locking tables, fancy stuff, error checking/handling
$result = OC_DB::query("delete from {$CONFIG_DBTABLEPREFIX}privatedata where `key` = '$key' and app = '$app'");
if (PEAR::isError($result)){
$entry='DB Error: "'.$result->getMessage().'"<br />';
error_log($entry);
return false;
}else{
return true;
}
}
//trim username prefixes from $array
private static function trimKeys($array,$user){
$length=strlen("$user::");
foreach($array as &$item){
$item['key']=substr($item['key'],$length);
}
return $array;
}
}
?>
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