nextcloud/lib/private/legacy/api.php

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<?php
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
*
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* @author Bart Visscher <bartv@thisnet.nl>
* @author Bernhard Posselt <dev@bernhard-posselt.com>
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* @author Björn Schießle <bjoern@schiessle.org>
* @author Christoph Wurst <christoph@owncloud.com>
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* @author Joas Schilling <coding@schilljs.com>
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* @author Jörn Friedrich Dreyer <jfd@butonic.de>
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* @author Lukas Reschke <lukas@statuscode.ch>
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* @author Michael Gapczynski <GapczynskiM@gmail.com>
* @author Morris Jobke <hey@morrisjobke.de>
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* @author Robin Appelman <robin@icewind.nl>
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* @author Roeland Jago Douma <roeland@famdouma.nl>
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* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Tom Needham <tom@owncloud.com>
* @author Vincent Petry <pvince81@owncloud.com>
*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program 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, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
use OCP\API;
use OCP\AppFramework\Http;
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class OC_API {
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/**
* api actions
*/
protected static $actions = array();
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/**
* registers an api call
* @param string $method the http method
* @param string $url the url to match
* @param callable $action the function to run
* @param string $app the id of the app registering the call
* @param int $authLevel the level of authentication required for the call
* @param array $defaults
* @param array $requirements
*/
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public static function register($method, $url, $action, $app,
$authLevel = API::USER_AUTH,
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$defaults = array(),
$requirements = array()) {
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$name = strtolower($method).$url;
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$name = str_replace(array('/', '{', '}'), '_', $name);
if(!isset(self::$actions[$name])) {
$oldCollection = OC::$server->getRouter()->getCurrentCollection();
OC::$server->getRouter()->useCollection('ocs');
OC::$server->getRouter()->create($name, $url)
->method($method)
->defaults($defaults)
->requirements($requirements)
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->action('OC_API', 'call');
self::$actions[$name] = array();
OC::$server->getRouter()->useCollection($oldCollection);
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}
self::$actions[$name][] = array('app' => $app, 'action' => $action, 'authlevel' => $authLevel);
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}
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/**
* respond to a call
* @param \OC\OCS\Result $result
* @param string $format the format xml|json
*/
public static function respond($result, $format='xml') {
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$request = \OC::$server->getRequest();
// Send 401 headers if unauthorised
if($result->getStatusCode() === API::RESPOND_UNAUTHORISED) {
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// If request comes from JS return dummy auth request
if($request->getHeader('X-Requested-With') === 'XMLHttpRequest') {
header('WWW-Authenticate: DummyBasic realm="Authorisation Required"');
} else {
header('WWW-Authenticate: Basic realm="Authorisation Required"');
}
http_response_code(401);
}
foreach($result->getHeaders() as $name => $value) {
header($name . ': ' . $value);
}
$meta = $result->getMeta();
$data = $result->getData();
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if (self::isV2($request)) {
$statusCode = self::mapStatusCodes($result->getStatusCode());
if (!is_null($statusCode)) {
$meta['statuscode'] = $statusCode;
http_response_code($statusCode);
}
}
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self::setContentType($format);
$body = self::renderResult($format, $meta, $data);
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echo $body;
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}
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/**
* @param XMLWriter $writer
*/
private static function toXML($array, $writer) {
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foreach($array as $k => $v) {
if ($k[0] === '@') {
$writer->writeAttribute(substr($k, 1), $v);
continue;
} else if (is_numeric($k)) {
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$k = 'element';
}
if(is_array($v)) {
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$writer->startElement($k);
self::toXML($v, $writer);
$writer->endElement();
} else {
$writer->writeElement($k, $v);
}
}
}
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/**
* @return string
*/
public static function requestedFormat() {
$formats = array('json', 'xml');
$format = !empty($_GET['format']) && in_array($_GET['format'], $formats) ? $_GET['format'] : 'xml';
return $format;
}
/**
* Based on the requested format the response content type is set
* @param string $format
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*/
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public static function setContentType($format = null) {
$format = is_null($format) ? self::requestedFormat() : $format;
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if ($format === 'xml') {
header('Content-type: text/xml; charset=UTF-8');
return;
}
if ($format === 'json') {
header('Content-Type: application/json; charset=utf-8');
return;
}
header('Content-Type: application/octet-stream; charset=utf-8');
}
/**
* @param \OCP\IRequest $request
* @return bool
*/
protected static function isV2(\OCP\IRequest $request) {
$script = $request->getScriptName();
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return substr($script, -11) === '/ocs/v2.php';
}
/**
* @param integer $sc
* @return int
*/
public static function mapStatusCodes($sc) {
switch ($sc) {
case API::RESPOND_NOT_FOUND:
return Http::STATUS_NOT_FOUND;
case API::RESPOND_SERVER_ERROR:
return Http::STATUS_INTERNAL_SERVER_ERROR;
case API::RESPOND_UNKNOWN_ERROR:
return Http::STATUS_INTERNAL_SERVER_ERROR;
case API::RESPOND_UNAUTHORISED:
// already handled for v1
return null;
case 100:
return Http::STATUS_OK;
}
// any 2xx, 4xx and 5xx will be used as is
if ($sc >= 200 && $sc < 600) {
return $sc;
}
return Http::STATUS_BAD_REQUEST;
}
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/**
* @param string $format
* @return string
*/
public static function renderResult($format, $meta, $data) {
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$response = array(
'ocs' => array(
'meta' => $meta,
'data' => $data,
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),
);
if ($format == 'json') {
return OC_JSON::encode($response);
}
$writer = new XMLWriter();
$writer->openMemory();
$writer->setIndent(true);
$writer->startDocument();
self::toXML($response, $writer);
$writer->endDocument();
return $writer->outputMemory(true);
}
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}