How to tail -f log file with python on browser [duplicate]

Question

I want to create a script with python flask or bottle module to print my /var/log/messages logs with tail -f command.

import subprocess
from bottle import route, response, run

@route("/")
def file():
    response.content_type = "text/plain"
    while True:
        return subprocess.check_output(["tail", "-4", "file"])

run(host='localhost', port=888)

when i try it with tail -f the page just hangs and loads for ever.

tail -f actually blocks current process. When you type it on terminal, it also blocks you, right? — scriptboy
– scriptboy, Commented Mar 1, 2018 at 8:58
the script run fine but on localhost:888/ the page loads forever with no output. — Adil
– Adil, Commented Mar 1, 2018 at 9:09

scriptboy · Accepted Answer · 2018-03-01 09:00:39Z

1

tail -f\ actually block current thread, it neverreturn` until you terminate it.

https://github.com/seb-m/pyinotify or http://pythonhosted.org/watchdog/ Would be a better idea.

answered Mar 1, 2018 at 9:00

scriptboy

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