https://github.com/mmzeeman/mod_sse

Zotonic module implementing Server Sent Events
https://github.com/mmzeeman/mod_sse

Last synced: about 16 hours ago
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Zotonic module implementing Server Sent Events

• Host: GitHub
• URL: https://github.com/mmzeeman/mod_sse
• Owner: mmzeeman
• License: apache-2.0
• Created: 2014-05-11T10:55:58.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2014-05-11T12:33:48.000Z (over 10 years ago)
• Last Synced: 2024-11-16T06:50:32.928Z (about 2 months ago)
• Language: Erlang
• Size: 145 KB
• Stars: 4
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
mod_sse

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Zotonic module implementing Server Sent Events

Introduction

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Server-sent events (SSE) is a push technologiy where a browser gets automatic updates from a server via HTTP connection. The Server-Sent Events EventSource API is standardized as part of HTML5 by the W3C.

This module consists of a module, ```z_sse```, implementing the SSE message protocol. This module can be used to implement custom SSE controllers. An example controller, ```controller_stream``` is also included. This controller can be used as drop-in replacement for the standard ```{% stream %}``` scomp. Instead of using a standard Comet and Websocket connection an SSE connection will be used.

SSE is supported by all newer browsers except Internet Explorer. A polyfill js library is included in order to implement SSE streams for browsers which do not support it.

### The Good

  - Push technology based on standard HTTP.

  - Easy to use on the client and server side. Clients handles automatic re-connects, which are server directed.

  - All modern browsers except IE have native implementation. IE is supported via polyfill js library.

  - Easily usable by external tools because it is standard HTTP.

### The Bad

Eventhough SSE is implemented as standard HTTP I have found that you can run into problems with security software. I have found that at least F-Secure's "Advanced Network Protection" feature blocks any SSE requests from competing. The response headers are never returned to the browser. It could be that other security products also block SSE requests.