import asyncio
import random
import aioredis
import redis
from quart import Quart, request, url_for, jsonify
app = Quart(__name__)
sr = redis.StrictRedis(host='localhost', port=6379)
sr.execute_command('FLUSHDB')
async def some_work():
global aredis
await aredis.set('state', 'running')
work_to_do = range(1, 26)
await aredis.set('length_of_work', len(work_to_do))
for i in work_to_do:
await aredis.set('processed', i)
await asyncio.sleep(random.random())
await aredis.set('state', 'ready')
await aredis.set('percent', 100)
@app.route('/check_status/')
async def check_status():
global aredis, sr
status = dict()
try:
if await aredis.get('state') == b'running':
if await aredis.get('processed') != await aredis.get('lastProcessed'):
await aredis.set('percent', round(
int(await aredis.get('processed')) / int(await aredis.get('length_of_work')) * 100, 2))
await aredis.set('lastProcessed', str(await aredis.get('processed')))
except:
pass
try:
status['state'] = sr.get('state').decode()
status['processed'] = sr.get('processed').decode()
status['length_of_work'] = sr.get('length_of_work').decode()
status['percent_complete'] = sr.get('percent').decode()
except:
status['state'] = sr.get('state')
status['processed'] = sr.get('processed')
status['length_of_work'] = sr.get('length_of_work')
status['percent_complete'] = sr.get('percent')
status['hint'] = 'refresh me.'
return jsonify(status)
@app.route('/progress/')
async def progress():
return """
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Asyncio Progress Bar Demo</title>
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<link rel="stylesheet" href="/resources/demos/style.css">
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<script>
var percent;
function checkStatus() {
$.getJSON('""" + url_for('check_status') + """', function (data) {
console.log(data);
percent = parseFloat(data.percent_complete);
update_bar(percent);
update_text(percent);
});
if (percent != 100) {
setTimeout(checkStatus, 1000);
}
}
function update_bar(val) {
if (val.length <= 0) {
val = 0;
}
$( "#progressBar" ).progressbar({
value: val
});
};
function update_text(val) {
if (val != 100) {
document.getElementById("progressData").innerHTML = " <center>"+percent+"%</center>";
} else {
document.getElementById("progressData").innerHTML = " <center>Done!</center>";
}
}
checkStatus();
</script>
</head>
<body>
<center><h2>Progress of work is shown below</h2></center>
<div id="progressBar"></div>
<div id="progressData" name="progressData"><center></center></div>
</body>
</html>"""
@app.route('/')
async def index():
return 'This is the index page. Try the following to <a href="' + url_for(
'start_work') + '">start some test work</a> with a progress indicator.'
@app.route('/start_work/')
async def start_work():
global aredis
loop = asyncio.get_event_loop()
aredis = await aioredis.create_redis('redis://localhost', loop=loop)
if await aredis.get('state') == b'running':
return "<center>Please wait for current work to finish.</center>"
else:
await aredis.set('state', 'ready')
if await aredis.get('state') == b'ready':
loop.create_task(some_work())
body = '''
<center>
work started!
</center>
<script type="text/javascript">
window.location = "''' + url_for('progress') + '''";
</script>'''
return body
if __name__ == "__main__":
app.run('localhost', port=5000, debug=True)
