Popularity
1.7
Growing
Activity
0.0
Stable
3
2
0

Monthly Downloads: 10
Programming language: Haskell
License: MIT License
Tags: Network    
Latest version: v1.1.0

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README

eventsourced

Build Status

eventsourced streams stdin to a TCP/IP port as text/event-source.

Installation

If you're on OS X you can install the latest binary with homebrew:

brew install richardTowers/tap/eventsourced

If you're on another platform or would prefer to install from source, you can install from cabal with:

cabal install eventsourced

Usage

On the server:

$ ping example.com | eventsourced --port=1337 --allow-origin=localhost

In the browser:

> new EventSource('http://0.0.0.0:1337').onmessage = e => console.log(e.data)
  PING example.com (93.184.216.34): 56 data bytes
  64 bytes from 93.184.216.34: icmp_seq=0 ttl=50 time=86.586 ms
  64 bytes from 93.184.216.34: icmp_seq=1 ttl=50 time=89.107 ms
  64 bytes from 93.184.216.34: icmp_seq=2 ttl=50 time=88.805 ms
  64 bytes from 93.184.216.34: icmp_seq=3 ttl=50 time=88.843 ms
  64 bytes from 93.184.216.34: icmp_seq=4 ttl=50 time=89.181 ms
  64 bytes from 93.184.216.34: icmp_seq=5 ttl=50 time=89.159 ms
  64 bytes from 93.184.216.34: icmp_seq=6 ttl=50 time=87.214 ms
  ...

Inspiration

This is similar in spirit to joewalnes/websocketd, but instead of two-way communication it is just one-way.

It was inspired by this post https://medium.com/@joewalnes/tail-f-to-the-web-browser-b933d9056cc

Ever wanted to pipe “tail -f” to a web-page? Here’s a one liner…

$ (echo -e ‘HTTP/1.1 200 OK\nAccess-Control-Allow-Origin: *\nContent-type: text/event-stream\n’ && tail -f /path/to/some/file | sed -u -e ‘s/^/data: /;s/$/\n/’) | nc -l 1234

eventsourced is a (slightly) more rigorous way of doing the same thing.