Remote Openhab Binding - Access REST via OpenhabCloud

Add-ons Bindings
1

Hi,

I have not looked into the code yet. But, from Remote Openhab binding’s introduction page, it doesn’t let us to put in username password. So, I assume that it doesn’t support connecting remote OH2/3 instances via OpenHabCloud? Reason being that all my remote OH instances are connected to OpenhabCloud, and i thought it would be easier to have the master OH3 accessing the remote instances via OpenHabcloud instead.

Thanks

2

It does not.
Feature not implemented.
Should be investigated, I am even not sure this would be possible.

3

My naive idea is to add authencation store to httpclient. Once logged in, I think we can access items via /rest? Cheers

4

I will investigate this weekend. It may be relatively easy to add this feature but not yet certain.

5

OK, no problem. I think have done a quick hack on this and here are my code. Anyway, thanks for your contribution

In RemoteopenhabRestClient:
public String executeUrl(HttpMethod httpMethod, String url, String acceptHeader, @Nullable InputStream content,
@Nullable String contentType, boolean asyncReading) throws RemoteopenhabException {
final Request request = httpClient.newRequest(url).method(httpMethod).timeout(REQUEST_TIMEOUT,
TimeUnit.MILLISECONDS);

    final String credentialToken = Base64.getEncoder()
            .encodeToString((this.username + ":" + this.password).getBytes());

        request.header(HttpHeaders.ACCEPT, acceptHeader);
        **request.header(HttpHeader.AUTHORIZATION, "Basic " + credentialToken);**

        if (!accessToken.isEmpty()) {
            request.header(HttpHeaders.AUTHORIZATION, "Bearer " + accessToken);
        }

…

Then on

 private SseEventSource createEventSource(String restSseUrl) {
        Client client;
        String credentialToken = Base64.getEncoder().encodeToString((this.username + ":" + this.password).getBytes());

        // Avoid a timeout exception after 1 minute by setting the read timeout to 0 (infinite)
        if (trustedCertificate) {
            client = clientBuilder.sslContext(httpClient.getSslContextFactory().getSslContext())
                    .register(new RemoteopenhabAuthenticator(this.username, this.password))
                    .hostnameVerifier(new HostnameVerifier() {
                        @Override
                        public boolean verify(@Nullable String hostname, @Nullable SSLSession session) {
                            return true;
                        }
                    }).readTimeout(0, TimeUnit.SECONDS).register(new RemoteopenhabStreamingRequestFilter(accessToken))
                    .build();
        } else {
            client = clientBuilder.readTimeout(0, TimeUnit.SECONDS)
                    .register(new RemoteopenhabAuthenticator(this.username, this.password))
                    .register(new RemoteopenhabStreamingRequestFilter(accessToken)).build();
        }

        SseEventSource eventSource = eventSourceFactory.newSource(client.target(restSseUrl));
        eventSource.register(this::onEvent, this::onError);
        return eventSource;
    }

Here is the authenticator:

public class RemoteopenhabAuthenticator implements ClientRequestFilter {

    private String user;
    private String password;

    @Override
    public void filter(ClientRequestContext requestContext) throws IOException {
        MultivaluedMap<String, Object> headers = requestContext.getHeaders();
        final String basicAuthentication = getBasicAuthentication();
        headers.add("Authorization", basicAuthentication);

    }

    public RemoteopenhabAuthenticator(String user, String password) {
        this.user = user;
        this.password = password;
    }

    private String getBasicAuthentication() {
        String token = this.user + ":" + this.password;
        try {
            return "BASIC " + DatatypeConverter.printBase64Binary(token.getBytes("UTF-8"));
        } catch (UnsupportedEncodingException ex) {
            throw new IllegalStateException("Cannot encode with UTF-8", ex);
        }
    }

}
6

Don’t hesitate to propose a PR if you validated a solution. It will save my time for something else.

7

I will review and test your solution once submitted.

8