application.py

import os
from flask import Flask, jsonify
from flask_cors import CORS
from flask_caching import Cache
from werkzeug.exceptions import HTTPException
from sqlalchemy.exc import DatabaseError

def create_app():
    app = Flask(__name__)
    app.config.from_pyfile('config.py')
    from model import db
    db.init_app(app)
    app.app_context().push()
    return app

app = create_app()
application = app  # for AWS EB
cors = CORS(app, resources={r"*": {"origins": "*"}})
cache = Cache(app)

import route.data
import route.nucleotide
import route.rdrp
import route.sra
import route.palmprint
import route.geo
import route.host
import route.misc

@app.errorhandler(Exception)
def server_error(e):
    if os.environ['FLASK_ENV'] == 'development':
        raise e
    if isinstance(e, HTTPException):
        return e
    if isinstance(e, DatabaseError):
        from model import db
        db.session.rollback()
    return jsonify(error=repr(e)), 500

@app.after_request
def add_header(response):
    response.cache_control.max_age = app.config['RESPONSE_CACHE_CONTROL_MAX_AGE']
    response.cache_control.public = app.config['RESPONSE_CACHE_CONTROL_PUBLIC']
    return response