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