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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 cloudrun_imageproc_controller]

import base64

import json

import os

from flask import Flask, request

import image

app = Flask(__name__)

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

def index():

"""Receive and parse Pub/Sub messages containing Cloud Storage event data."""

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)

return ("", 204)

except Exception as e:

print(f"error: {e}")

return ("", 500)

return ("", 500)

# [END cloudrun_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)