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server.py
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server.py
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# -*- coding: utf-8 -*-
from flask import Flask
from flask import render_template
import flask_restful as restful
import os
import time
from datetime import datetime
app = Flask(__name__)
api = restful.Api(app)
@app.route('/')
def index():
return render_template('index.html')
class DataUpdate(restful.Resource):
def _is_updated(self, request_time):
"""
Returns if resource is updated or it's the first
time it has been requested.
args:
request_time: last request timestamp
"""
return os.stat('data.txt').st_mtime > request_time
def get(self):
"""
Returns 'data.txt' content when the resource has
changed after the request time
"""
request_time = time.time()
while not self._is_updated(request_time):
time.sleep(0.5)
content = ''
with open('data.txt') as data:
content = data.read()
return {'content': content,
'date': datetime.now().strftime('%Y/%m/%d %H:%M:%S')}
class Data(restful.Resource):
def get(self):
"""
Returns the current data content
"""
content = ''
with open('data.txt') as data:
content = data.read()
return {'content': content}
api.add_resource(DataUpdate, '/data-update')
api.add_resource(Data, '/data')
if __name__ == '__main__':
app.run(port=5000, debug=True)