A Flask web app that uses the Server class defined in translate_client.py

translate_web_app.py

# -*- coding: utf-8 -*-
import os
import sys
import logging
from flask import Flask, request, jsonify
from flask_cors import CORS, cross_origin


from translate_client import Server

# IMPORTANT: DO NOT USE 'localhost' because AWS uses localhost/127.0.0.1 
# for private internal addressing so you might have access problems
HOST='0.0.0.0'


# define the app
app = Flask(__name__)
CORS(app) # needed for cross-domain requests, allow everything by default


# logging for heroku
if 'DYNO' in os.environ:
    app.logger.addHandler(logging.StreamHandler(sys.stdout))
    app.logger.setLevel(logging.INFO)


# load the model
server = Server(HOST, 9000)

# API route
@app.route('/api', methods=['POST'])
@cross_origin()
def api():
    """API function

    All model-specific logic to be defined in the get_model_api()
    function
    """
    input_data = request.json
    app.logger.info("api_input: " + str(input_data))
    print(input_data)
    output_data = server.translate(input_data['word'])
    app.logger.info("api_output: " + str(output_data))
    response = jsonify(output_data)
    return response


@app.route('/')
def index():
    return "Index API"

# HTTP Errors handlers
@app.errorhandler(404)
def url_error(e):
    return """
    Wrong URL!
    <pre>{}</pre>""".format(e), 404


@app.errorhandler(500)
def server_error(e):
    return """
    An internal error occurred: <pre>{}</pre>
    See logs for full stacktrace.
    """.format(e), 500


if __name__ == '__main__':
    # This is used when running locally.
    app.run(host=HOST, debug=True)