migrate-flask-myapp.py

# import declaration
from flask import Flask, request, jsonify, render_template, send_from_directory
import random

# initialization
app = Flask(__name__)

# hello world, GET method, return string
@app.route('/')
def hello():
    return "Hello World!"

# random number, GET method, return string
@app.route('/random-number')
def random_number():
    return str(random.randrange(100))

# check isAlpha, GET method, query parameter, return JSON
@app.route('/alpha', methods=['GET'])
def alpha():
    text = request.args.get('text', '')

    result = {'text': text, 'is_alpha' : text.isalpha()}

    return jsonify(result)

# create new user, POST method, form fields, return JSON
@app.route('/create-user', methods=['POST'])
def create_user():
    id = request.form.get('id', '0001')
    name = request.form.get('name', 'Anonymous')

    # code for authentication, validation, update database
    
    data = {'id': id, 'name': name}
    result = {'status_code': '0', 'status_message' : 'Success', 'data': data}

    return jsonify(result)

# update language, PUT method, JSON input, return string
@app.route('/update-language', methods=['POST', 'PUT', 'GET', 'DELETE'])
def update_language():
    language = 'english'

    if request.method == 'PUT':
        json_data = request.get_json()
        language = json_data['language']

    return "Successfully updated language to %s" % (language)

# serve webpage, GET method, return HTML
@app.route('/get-webpage', methods=['GET'])
def get_webpage():
    return render_template('index.html', message="Contact Us")

# file response, GET method, return file as attachment
@app.route('/get-language-file/<string:language>', methods=['GET'])
def get_language_file(language):
    return send_from_directory('./static/language', language + '.json', as_attachment=True)

# main
if __name__ == '__main__':
    app.run('0.0.0.0',port=8000)