Communication protocols
The following table describes communication between the
components involved in push functionality.
| Source | Destination | Protocol | Description and Timeouts |
|---|---|---|---|
| User agent (browser) | Push server (application server) | HTTPS One-way SSL with a server side certificate |
The push server brokers the establishment of an initial push session. The push server authenticates the user and provides the location of a push redirector to the user agent, along with a unique client ID. |
| User agent (browser) | Push redirector | HTTPS/Comet One-way SSL with a server side certificate |
The user agent uses the Comet model to establish a long-held HTTP connection with the redirector to enable the push redirector to push data to the browser. |
| Push redirector | Push server (application server) | HTTPS One-way SSL with a server side certificate |
The push server communicates with the push redirector to push information to users. The push server also brokers a three-way handshake between the user agent and the push redirector when initializing a push session. |