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Flask simplest realtime log file viewer
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<!DOCTYPE html> | |
<html lang="en" xmlns="http://www.w3.org/1999/xhtml" dir="ltr" class="uk-height-1-1"> | |
<head> | |
<meta charset="utf-8" /> | |
<meta name="viewport" content="width=device-width, initial-scale=1"> | |
<title>flasktest</title> | |
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bulma/0.7.1/css/bulma.min.css" /> | |
<script defer src="https://use.fontawesome.com/releases/v5.3.1/js/all.js"></script> | |
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> | |
</head> | |
<body> | |
<section class="section"> | |
<div class="container"> | |
<div class="columns is-centered is-mobile"> | |
<div class="column is-muted notification is-four-fifths"> | |
<h1 class="title">flasktest</h1> | |
<h2 class="subtitle">Progress example</h2> | |
<div id="progress"></div> | |
</div> | |
</div> | |
</div> | |
<div class="container"> | |
<div class="columns is-centered is-mobile"> | |
<div class="column is-dark notification is-four-fifths"> | |
<div class="is-size-7 has-text-warning" id="display"> | |
<ul id="display_list"> | |
</ul> | |
</div> | |
</div> | |
</div> | |
</div> | |
</section> | |
<script type="text/javascript"> | |
var source = new EventSource("/log"); | |
source.onmessage = function(event) { | |
// $('#display').prepend(event.data); | |
$('#display_list').prepend('<li>'+event.data+'</li>'); | |
if(event.data == 100){ | |
source.close() | |
} | |
} | |
var source_progress = new EventSource("/progress"); | |
source_progress.onmessage = function(event) { | |
$('#progress').text(event.data+'%'); | |
$('#progress').value(event.data); | |
if(event.data == 100){ | |
source_progress.close() | |
} | |
} | |
</script> | |
</body> | |
</html> |
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# -*- coding: utf-8 -*- | |
from flask import Flask, render_template, request, Response | |
from pygtail import Pygtail | |
import logging, os, sys, time | |
app = Flask(__name__) | |
app.config["SECRET_KEY"] = "SECRETKEYSECRETKEYSECRETKEYSECRETKEYSECRETKEY" | |
app.config["DEBUG"] = os.environ.get("FLASK_DEBUG", True) | |
app.config["JSON_AS_ASCII"] = False | |
LOG_FILE = 'app.log' | |
log = logging.getLogger('__name__') | |
logging.basicConfig(filename=LOG_FILE, level=logging.DEBUG) | |
@app.route('/') | |
def entry_point(): | |
log.info("route =>'/env' - hit!") | |
return render_template('base.html') | |
@app.route('/progress') | |
def progress(): | |
def generate(): | |
x = 0 | |
while x <= 100: | |
yield "data:" + str(x) + "\n\n" | |
x = x + 10 | |
time.sleep(0.5) | |
return Response(generate(), mimetype= 'text/event-stream') | |
@app.route('/log') | |
def progress_log(): | |
def generate(): | |
for line in Pygtail(LOG_FILE, every_n=1): | |
yield "data:" + str(line) + "\n\n" | |
time.sleep(0.5) | |
return Response(generate(), mimetype= 'text/event-stream') | |
@app.route('/env') | |
def show_env(): | |
log.info("route =>'/env' - hit") | |
env = {} | |
for k,v in request.environ.items(): | |
env[k] = str(v) | |
log.info("route =>'/env' [env]:\n%s" % env) | |
return env | |
if __name__ == '__main__': | |
app.run(debug=True) |
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