main.py

# 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.
"""An example of using https://cloud.google.com/profiler on GAE standard."""

from flask import Flask
# [START profiler_python_appengine_standard_python37]
import googlecloudprofiler

# Profiler initialization. It starts a daemon thread which continuously
# collects and uploads profiles. Best done as early as possible.
try:
    # service and service_version can be automatically inferred when
    # running on App Engine. project_id must be set if not running
    # on GCP.
    googlecloudprofiler.start(verbose=3)
except (ValueError, NotImplementedError) as exc:
    print(exc)  # Handle errors here

# [END profiler_python_appengine_standard_python37]


# If `entrypoint` is not defined in app.yaml, App Engine will look for an app
# called `app` in `main.py`.
app = Flask(__name__)


@app.route('/')
def hello():
    """Return a friendly HTTP greeting."""
    return 'Hello World!'


if __name__ == '__main__':
    # This is used when running locally only. When deploying to Google App
    # Engine, a webserver process such as Gunicorn will serve the app. This
    # can be configured by adding an `entrypoint` to app.yaml.
    app.run(host='127.0.0.1', port=8080, debug=True)