property
authenticateProxy

authenticateProxy
write-only

Sets the function to be called when a proxy is requesting authentication. Information on the proxy in use and the security realm for the authentication are passed in the arguments [host], [port] and [realm].

The function returns a [Future] which should complete when the authentication has been resolved. If credentials cannot be provided the [Future] should complete with false. If credentials are available the function should add these using [addProxyCredentials] before completing the [Future] with the value true.

If the [Future] completes with true the request will be retried using the updated credentials. Otherwise response processing will continue normally.