Server-sent events (SSE) is an example of an asynchronous, HTTP-based, publish-subscribe technology. It offers an easy-to-use one-way streaming communication protocol. Clients can register for a topic by requesting a HTTP resource that leaves an open connection. The server sends messages to connected clients over these active HTTP connections. Clients cannot directly communicate back, but can only open and close connections to the streaming endpoint. This lightweight solution fits use cases with broadcast updates, such as social media updates, stock prices, or news feeds.
The server pushes UTF-8 text-based data as content type text/event-stream to clients who previously registered for the topics. The following shows the ...
