1 files changed, 104 insertions, 0 deletions
diff --git a/apps/dav/lib/CardDAV/MultiGetExportPlugin.php b/apps/dav/lib/CardDAV/MultiGetExportPlugin.php
new file mode 100644
index 00000000000..9d6b0df838e
--- /dev/null
+++ b/apps/dav/lib/CardDAV/MultiGetExportPlugin.php
@@ -0,0 +1,104 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+namespace OCA\DAV\CardDAV;
+
+use OCP\AppFramework\Http;
+use Sabre\DAV;
+use Sabre\DAV\Server;
+use Sabre\HTTP\RequestInterface;
+use Sabre\HTTP\ResponseInterface;
+
+class MultiGetExportPlugin extends DAV\ServerPlugin {
+
+	/** @var Server */
+	protected $server;
+
+	/**
+	 * Initializes the plugin and registers event handlers
+	 *
+	 * @param Server $server
+	 * @return void
+	 */
+	public function initialize(Server $server) {
+		$this->server = $server;
+		$this->server->on('afterMethod:REPORT', [$this, 'httpReport'], 90);
+	}
+
+	/**
+	 * Intercepts REPORT requests
+	 *
+	 * @param RequestInterface $request
+	 * @param ResponseInterface $response
+	 * @return bool
+	 */
+	public function httpReport(RequestInterface $request, ResponseInterface $response) {
+		$queryParams = $request->getQueryParameters();
+		if (!array_key_exists('export', $queryParams)) {
+			return;
+		}
+
+		// Only handling xml
+		$contentType = (string)$response->getHeader('Content-Type');
+		if (!str_contains($contentType, 'application/xml') && !str_contains($contentType, 'text/xml')) {
+			return;
+		}
+
+		$this->server->transactionType = 'vcf-multi-get-intercept-and-export';
+
+		// Get the xml response
+		$responseBody = $response->getBodyAsString();
+		$responseXml = $this->server->xml->parse($responseBody);
+
+		// Reduce the vcards into one string
+		$output = array_reduce($responseXml->getResponses(), function ($vcf, $card) {
+			$vcf .= $card->getResponseProperties()[200]['{urn:ietf:params:xml:ns:carddav}address-data'] . PHP_EOL;
+			return $vcf;
+		}, '');
+
+		// Build and override the response
+		$filename = 'vcfexport-' . date('Y-m-d') . '.vcf';
+		$response->setHeader('Content-Disposition', 'attachment; filename="' . $filename . '"');
+		$response->setHeader('Content-Type', 'text/vcard');
+
+		$response->setStatus(Http::STATUS_OK);
+		$response->setBody($output);
+
+		return true;
+	}
+
+	/**
+	 * Returns a plugin name.
+	 *
+	 * Using this name other plugins will be able to access other plugins
+	 * using \Sabre\DAV\Server::getPlugin
+	 *
+	 * @return string
+	 */
+	public function getPluginName() {
+		return 'vcf-multi-get-intercept-and-export';
+	}
+
+	/**
+	 * Returns a bunch of meta-data about the plugin.
+	 *
+	 * Providing this information is optional, and is mainly displayed by the
+	 * Browser plugin.
+	 *
+	 * The description key in the returned array may contain html and will not
+	 * be sanitized.
+	 *
+	 * @return array
+	 */
+	public function getPluginInfo() {
+		return [
+			'name' => $this->getPluginName(),
+			'description' => 'Intercept a multi-get request and return a single vcf file instead.'
+		];
+	}
+}