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# Copyright 2019 Google, LLC.

#

# 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 run_imageproc_controller]

import base64

import json

import os

import sys

from flask import Flask, request

import image

app = Flask(__name__)

@app.route('/', methods=['POST'])

def index():

envelope = request.get_json()

if not envelope:

msg = 'no Pub/Sub message received'

print(f'error: {msg}')

return f'Bad Request: {msg}', 400

if not isinstance(envelope, dict) or 'message' not in envelope:

msg = 'invalid Pub/Sub message format'

print(f'error: {msg}')

return f'Bad Request: {msg}', 400

# Decode the Pub/Sub message.

pubsub_message = envelope['message']

if isinstance(pubsub_message, dict) and 'data' in pubsub_message:

try:

data = json.loads(

base64.b64decode(pubsub_message['data']).decode())

except Exception as e:

msg = ('Invalid Pub/Sub message: '

'data property is not valid base64 encoded JSON')

print(f'error: {e}')

return f'Bad Request: {msg}', 400

# Validate the message is a Cloud Storage event.

if not data["name"] or not data["bucket"]:

msg = ('Invalid Cloud Storage notification: '

'expected name and bucket properties')

print(f'error: {msg}')

return f'Bad Request: {msg}', 400

try:

image.blur_offensive_images(data)

# Flush the stdout to avoid log buffering.

sys.stdout.flush()

return ('', 204)

except Exception as e:

print(f'error: {e}')

return ('', 500)

return ('', 500)

# [END run_imageproc_controller]

if __name__ == '__main__':

PORT = int(os.getenv('PORT')) if os.getenv('PORT') else 8080

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

# application on Cloud Run. See entrypoint in Dockerfile.

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