I need to establish a server to server communication over WAN. Server A may be behind the firewall. For security purpose, only server A can initiate request to server B in order for server B to respond back to server A.
What're the pros and cons between Websockets vs. Bidirectional-streams Over Synchronous HTTP (BOSH)?
I did some search on this topic, but all seem to compare them in the context of UI being involved.