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# Copyright 2019 Google LLC All Rights Reserved.
#
# 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 subprocess
from flask import Flask
from flask import request
app = Flask(__name__)
pascal_executable = '/app/roman'
@app.route('/<number>')
def convert_to_roman(number):
number = number.encode() # Need byte string
result = subprocess.run(pascal_executable, input=number, capture_output=True)
if result.returncode != 0:
# Maybe the user sent an invalid value (can't be read as an integer) or
# maybe the Pascal program has an error. Not going to try to tell them
# apart here, just say something went wrong.
return result.stderr, 500
elif result.stderr != b'':
# The Pascal program wrote an error message, so this is a user error
return result.stderr, 400
else:
return result.stdout, 200
if __name__ == "__main__":
app.run(debug=True,host='0.0.0.0',port=int(os.environ.get('PORT', 8080)))
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