Uncaught exception in method 'exists'

[ntma]

Hello,

Using connection.exists(path, callback) creates an uncaught exception when the request cannot reach the webdav server. My case happens when my nextcloud server is down or shuts down during this request, which makes res to be null in the following line:

npm-WebDAV-Client/src/index.ts

Line 287 in ba7280b

callback(e, res.statusCode <= 400);

There should be a sanity test to check if res is null before accessing the statusCode.