We have a use-case where we need to convert HTML to PDF archives.
The HTML we use contains links to secured endpoints for certain images and embedded content which requires a configured REST client (RestTemplate, WebClient, etc) that uses the SecurityContext to set specific request headers and client authentication.
With other PDF converters, I had the ability to provide a custom UserAgent to inflate external resources but I can’t seem to find a way to accomplish this with GroupDocs conversion.
For example, IText provides support for this:
ITextRenderer renderer = new ITextRenderer();
SecureUserAgent agent = new SecureUserAgent(client, output);
agent.setSharedContext(renderer.getSharedContext());
renderer.getSharedContext().setUserAgentCallback(agent);