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# Copyright 2018 Google Inc.

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

# [START memorystore_main_py]

import logging

import os

from flask import Flask

import redis

app = Flask(__name__)

redis_host = os.environ.get('REDISHOST', 'localhost')

redis_port = int(os.environ.get('REDISPORT', 6379))

redis_client = redis.StrictRedis(host=redis_host, port=redis_port)

@app.route('/')

def index():

value = redis_client.incr('counter', 1)

return 'Visitor number: {}'.format(value)

@app.errorhandler(500)

def server_error(e):

logging.exception('An error occurred during a request.')

return """

An internal error occurred: <pre>{}</pre>

See logs for full stacktrace.

""".format(e), 500

if __name__ == '__main__':

# This is used when running locally. Gunicorn is used to run the

# application on Google App Engine and Cloud Run.

# See entrypoint in app.yaml or Dockerfile.

app.run(host='127.0.0.1', port=8080, debug=True)

# [END memorystore_main_py]