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<?php
/**
* SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
* SPDX-License-Identifier: AGPL-3.0-only
*/
namespace OCA\DAV\Files;
use OC_Template;
use OCP\AppFramework\Http\ContentSecurityPolicy;
use OCP\IConfig;
use OCP\IRequest;
use Sabre\DAV\Exception;
use Sabre\DAV\Server;
use Sabre\DAV\ServerPlugin;
class ErrorPagePlugin extends ServerPlugin {
private ?Server $server = null;
public function __construct(
private IRequest $request,
private IConfig $config,
) {
}
/**
* This initializes the plugin.
*
* This function is called by Sabre\DAV\Server, after
* addPlugin is called.
*
* This method should set up the required event subscriptions.
*/
public function initialize(Server $server): void {
$this->server = $server;
$server->on('exception', [$this, 'logException'], 1000);
}
public function logException(\Throwable $ex): void {
if ($ex instanceof Exception) {
$httpCode = $ex->getHTTPCode();
$headers = $ex->getHTTPHeaders($this->server);
} else {
$httpCode = 500;
$headers = [];
}
$this->server->httpResponse->addHeaders($headers);
$this->server->httpResponse->setStatus($httpCode);
$body = $this->generateBody($ex, $httpCode);
$this->server->httpResponse->setBody($body);
$csp = new ContentSecurityPolicy();
$this->server->httpResponse->addHeader('Content-Security-Policy', $csp->buildPolicy());
$this->sendResponse();
}
/**
* @codeCoverageIgnore
* @return bool|string
*/
public function generateBody(\Throwable $ex, int $httpCode): mixed {
if ($this->acceptHtml()) {
$templateName = 'exception';
$renderAs = 'guest';
if ($httpCode === 403 || $httpCode === 404) {
$templateName = (string)$httpCode;
}
} else {
$templateName = 'xml_exception';
$renderAs = null;
$this->server->httpResponse->setHeader('Content-Type', 'application/xml; charset=utf-8');
}
$debug = $this->config->getSystemValueBool('debug', false);
$content = new OC_Template('core', $templateName, $renderAs);
$content->assign('title', $this->server->httpResponse->getStatusText());
$content->assign('remoteAddr', $this->request->getRemoteAddress());
$content->assign('requestID', $this->request->getId());
$content->assign('debugMode', $debug);
$content->assign('errorClass', get_class($ex));
$content->assign('errorMsg', $ex->getMessage());
$content->assign('errorCode', $ex->getCode());
$content->assign('file', $ex->getFile());
$content->assign('line', $ex->getLine());
$content->assign('exception', $ex);
return $content->fetchPage();
}
/**
* @codeCoverageIgnore
*/
public function sendResponse() {
$this->server->sapi->sendResponse($this->server->httpResponse);
exit();
}
private function acceptHtml(): bool {
foreach (explode(',', $this->request->getHeader('Accept')) as $part) {
$subparts = explode(';', $part);
if (str_ends_with($subparts[0], '/html')) {
return true;
}
}
return false;
}
}
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