main.py

# Copyright 2020 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.

import os

import bleach
from flask import Flask, request
import markdown


app = Flask(__name__)


@app.route("/", methods=["POST"])
def index():
    data = request.get_data(as_text=True)
    # Parses the markdown and outputs the formatted HTML
    html = markdown.markdown(data)

    # Keep the paragraph tags
    bleach.sanitizer.ALLOWED_TAGS.append('p')
    # Sanitize and return
    clean = bleach.clean(html, strip=True)
    return clean


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)