How to configure corporate HTTP proxy with authentication - docusignapi

Question

I am testing the DocuSign API Client for Java.
The problem is that the testing environment as well as the production environment is behind a corporate Proxy that needs authentication (username + password, not just host + port).
But I see no way to configure the DocuSign ApiClient.
I only can set up http.proxyHost and http.proxyPort, but no http.proxyUser and http.proxyPassword.
System.getProperties().put("http.proxyHost", host);
System.getProperties().put("https.proxyHost", host);
System.getProperties().put("http.proxyPort", String.valueOf(port));
System.getProperties().put("https.proxyPort", String.valueOf(port));
System.getProperties().put("http.proxyUser", user);
System.getProperties().put("http.proxyPassword", password);
Authenticator.setDefault(
new Authenticator() {
#Override
public PasswordAuthentication getPasswordAuthentication() {
if (getRequestorType() == Authenticator.RequestorType.PROXY) {
System.out.println(getRequestingHost() + ":" + getRequestingPort() + " -> " + getRequestingURL());
return new PasswordAuthentication(user, password.toCharArray());
}
return null;
}
}
);
Setting the Authenticator.setDefault() works with default java http client, but it does not show any effect when using the DocuSign ApiClient.

Answer 1

yes, you can do that using:
For HTTPS (recommended): https.proxyHost, https.proxyPort, https.proxyUser and https.proxyPassword
For HTTP: http.proxyHost, http.proxyPort, http.proxyUser and http.proxyPassword
this was added in version 2.9.0 of the client which was released in Feb, so if you have that or later - you should be good

Answer 2

I have updated from 2.8.0 to 2.9.0.
I have tested it but currently I still get the same exception com.sun.jersey.api.client.ClientHandlerException: java.io.IOException: Unable to tunnel through proxy. Proxy returns "HTTP/1.0 407 Proxy Authentication Required"
I used this code as recommended in the last answer:
System.getProperties().put("http.proxyHost", host);
System.getProperties().put("https.proxyHost", host);
System.getProperties().put("http.proxyPort", String.valueOf(port));
System.getProperties().put("https.proxyPort", String.valueOf(port));
System.getProperties().put("http.proxyUser", user);
System.getProperties().put("https.proxyUser", user);
System.getProperties().put("http.proxyPassword", password);
System.getProperties().put("https.proxyPassword", password);
The problem is that http.proxyUser and http.proxyPassword don't get recognized by the DocuSign API Client.