tail -f to the web-browser

tail-to-browser.sh

# https://medium.com/@joewalnes/tail-f-to-the-web-browser-b933d9056cc#.nzwlj0wp6
# Server
$ (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

# Browser
new EventSource("http://host:1234/").onmessage = function(e) {
  console.log(e.data);
};