Error handling

[jonaslund]

How to do proper error handling?

Running it with no Internet, which may happen in various installations, should happen cleanly and with proper error reporting, currently it results in a unhandled promise rejection,

    at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:66:26)
(node:63019) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing
 inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To 
terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see
 https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)

Thanks

[jonaslund]

Solution. Put a catch error block in the request() function, like so

    request() {
        const { from, requestOpts } = this.opts;

        return new Promise(resolve => {
            if (from !== Auto) {
                resolve()
            } else {
                this.langdetect().then(lan => {
                    this.opts.from = lan;
                    resolve();
                });
            }
        }).then(() => {
            return cookie.get(requestOpts).then(() => this.trans());
        }).catch((err) => {
            return "error";
        }); 
    }