Server-sent events (SSE) is a technology where a browser receives automatic updates from a server via HTTP connection. The Server-Sent Events EventSource API is standardized as part of HTML5 by the W3C.
The WHATWG Web Applications 1.0 proposal included a mechanism to push content to the client. On September 1, 2006, the Opera web browser implemented this new experimental technology in a feature called "Server-Sent Events".
Server-sent events is a standard describing how servers can initiate data transmission towards clients once an initial client connection has been established. They are commonly used to send message updates or continuous data streams to a browser client and designed to enhance native, cross-browser streaming through a JavaScript API called EventSource, through which a client requests a particular URL in order to receive an event stream.
jEaSSE - Server-side asynchronous implementation for Java servlets and Vert.x
EventSource - Server-sent events EventSource implementation in Swift using NSURLSession
TRVSEventSource - Server-sent events EventSource implementation in Objective-C for iOS and OS X using NSURLSession.
[1] - EventSource client library for Python using Requests library.
[2] - EventSource client library for Python using Requests or urllib3 library.
django-sse - HTML5 Server-Sent Events integration for Python/Django.
flask-sse - A simple Flask extension for HTML5 server-sent events support, powered by Redis.
sse - Server Sent Events protocol implementation on python2 and python3 in the same codebase.
event-source-library - Server Sent Events protocol implementation in python2 with Tornado. Client and server implementations.
SignalR - Transparent implementation for ASP.NET.
Mojolicious - Perl real-time web framework.
HoaEventsource - PHP Server-Sent Events implementation.
sse-stream - Node.js/Browserify Server-Sent Events implementation (client and server).
total.js - web application framework for node.js - Server-Sent Events example + supports WebSockets (RFC 6455)
eventsource-node - EventSource client for Node.js
eventsource EventSource library for Go.
akka-sse EventSource library for akka-http.
Lasse EventSource server handler for Erlang's cowboy
Shotgun EventSource client in Erlang
Service Stack EventSource library for .Net, with both server and client implementations.
