Connections behind a proxy

[demilatof]

It seems to me that the registry client doesn't support a connection behind a proxy.
If your Tomcat is configured to work behind a proxy server you could change the DefaultCatalogueFetcher.java by adding:

  /**
   * The proxy server, if it is not null
   */
  Proxy proxy = null;
  
  /**
   * Allows to set a proxy for HttpxURLConnection
   * 
   * @param proxyType The type of proxy (DIRECT/HTTP/SOCKS)
   * @param proxyIpAddress The address of the proxy
   * @param proxyPort  The port of the proxy
   */
  public void setProxy(Proxy.Type proxyType, String proxyIpAddress, Integer proxyPort)
  {
    proxy = new Proxy(proxyType, new InetSocketAddress(proxyIpAddress, proxyPort));
  }

and then modify the connection in fetchCatalogue to use the proxy only if it has been previously created invoking setProxy.

You have to change the last line in

  @Override
  public RegistryResponse fetchCatalogue(String previousETag) throws IOException {
    URL url = new URL("https://" + this.registryDomain + "/catalogue-v1.xml");

    logger.debug("Opening HTTPS connection to {}", url);   
    
    HttpsURLConnection conn = url.openConnection();

to these three lines

    HttpsURLConnection conn = null;
    if (proxy!=null) conn = (HttpsURLConnection) url.openConnection(proxy);
    else conn = (HttpsURLConnection) url.openConnection();