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$ curl repovive.com/roadmaps/system-design-interview-prep/networking-apis/server-sent-events

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$ curl repovive.com/roadmaps/system-design-interview-prep/networking-apis/server-sent-events

Repovive

Server-Sent Events - Networking & APIs | System Design Interview Prep | Repovive

Repovive.

System Design Interview Prep22 sections · 691 units23h total

Open in Course

Server-Sent Events

One-way streaming

SSE provides server-to-client streaming over HTTP:

HTTP/1.1 200 OK
Content-Type: text/event-stream

data: {"price": 150.25}

data: {"price": 150.30}

Advantages over WebSockets:

Simpler (just HTTP)
Auto-reconnection built in
Works with HTTP/2 multiplexing
Cacheable and proxy-friendly

Limitations:

Server-to-client only
Text-based (no binary)
Limited concurrent connections in HTTP/1.1

Use SSE for live feeds, notifications, progress updates where client doesn't need to send data.