nextcloud/apps/files/ajax/newfile.php

<?php

// Init owncloud
global $eventSource;

if (!OC_User::isLoggedIn()) {
	exit;
}

session_write_close();
// Get the params
$dir = isset($_REQUEST['dir']) ? '/' . trim($_REQUEST['dir'], '/\\') : '';
$filename = isset($_REQUEST['filename']) ? trim($_REQUEST['filename'], '/\\') : '';
$content = isset($_REQUEST['content']) ? $_REQUEST['content'] : '';
$source = isset($_REQUEST['source']) ? trim($_REQUEST['source'], '/\\') : '';

if ($source) {
	$eventSource = new OC_EventSource();
} else {
	OC_JSON::callCheck();
}

if ($filename == '') {
	OCP\JSON::error(array("data" => array("message" => "Empty Filename")));
	exit();
}
if (strpos($filename, '/') !== false) {
	OCP\JSON::error(array("data" => array("message" => "Invalid Filename")));
	exit();
}

function progress($notification_code, $severity, $message, $message_code, $bytes_transferred, $bytes_max) {
	static $filesize = 0;
	static $lastsize = 0;
	global $eventSource;

	switch ($notification_code) {
		case STREAM_NOTIFY_FILE_SIZE_IS:
			$filesize = $bytes_max;
			break;

		case STREAM_NOTIFY_PROGRESS:
			if ($bytes_transferred > 0) {
				if (!isset($filesize)) {
				} else {
					$progress = (int)(($bytes_transferred / $filesize) * 100);
					if ($progress > $lastsize) { //limit the number or messages send
						$eventSource->send('progress', $progress);
					}
					$lastsize = $progress;
				}
			}
			break;
	}
}

if ($source) {
	if (substr($source, 0, 8) != 'https://' and substr($source, 0, 7) != 'http://') {
		OCP\JSON::error(array("data" => array("message" => "Not a valid source")));
		exit();
	}

	$ctx = stream_context_create(null, array('notification' => 'progress'));
	$sourceStream = fopen($source, 'rb', false, $ctx);
	$target = $dir . '/' . $filename;
	$result = \OC\Files\Filesystem::file_put_contents($target, $sourceStream);
	if ($result) {
		$meta = \OC\Files\Filesystem::getFileInfo($target);
		$mime = $meta['mimetype'];
		$id = $meta['fileid'];
		$eventSource->send('success', array('mime' => $mime, 'size' => \OC\Files\Filesystem::filesize($target), 'id' => $id));
	} else {
		$eventSource->send('error', "Error while downloading " . $source . ' to ' . $target);
	}
	$eventSource->close();
	exit();
} else {
	if ($content) {
		if (\OC\Files\Filesystem::file_put_contents($dir . '/' . $filename, $content)) {
			$meta = \OC\Files\Filesystem::getFileInfo($dir . '/' . $filename);
			$id = $meta['fileid'];
			OCP\JSON::success(array("data" => array('content' => $content, 'id' => $id)));
			exit();
		}
	} elseif (\OC\Files\Filesystem::touch($dir . '/' . $filename)) {
		$meta = \OC\Files\Filesystem::getFileInfo($dir . '/' . $filename);
		$templateManager = OC_Helper::getFileTemplateManager();
		if ($content = $templateManager->getTemplate($meta['mimetype'])) {
			\OC\Files\Filesystem::file_put_contents($dir . '/' . $filename, $content);
		}
		$id = $meta['fileid'];
		OCP\JSON::success(array("data" => array('content' => $content, 'id' => $id, 'mime' => $meta['mimetype'])));
		exit();
	}
}


OCP\JSON::error(array("data" => array("message" => "Error when creating the file")));