flask eg

from flask import Flask, jsonify, flash, request, redirect, url_for
from werkzeug.utils import secure_filename
import os
app = Flask(__name__)


@app.route('/')
def hello():
    return "Hello World!"


#if __name__ == '__main__':
#    app.run(host='0.0.0.0')


@app.route('/req_qns')
def respond():
    qns = {'1':'How are you?',
    '2':'Do you like bread?',
    '3':'Whats your fav booze?',
    '4':'whts the time?'}
    return jsonify(qns)


#def allowed_file(filename):
#    return '.' in filename and \
#           filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS

UPLOAD_FOLDER = '/var/www/new-flask/uploads/'
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
app.secret_key = 'super secret key'
app.config['SESSION_TYPE'] = 'filesystem'

@app.route('/up', methods=['GET', 'POST'])
def upload_file():
    if request.method == 'POST':
        # check if the post request has the file part
        if 'file1' not in request.files and 'file2' not in request.files and 'file3' not in request.files and 'file4' not in request.files:
            flash('Missing files')
            return redirect(request.url)

        file1 = request.files['file1']
        file2 = request.files['file2']
        file3 = request.files['file3']
        file4 = request.files['file4']

        #return 'reached point 1'
        # if user does not select file, browser also
        # submit an empty part without filename
        if file1.filename == '' or file2.filename == '' or file3.filename == '' or file4.filename == '':
            flash('No selected file')
            return redirect(request.url)
        #return 'uploaded'
        #if file and allowed_file(file.filename):
        if file1 and file2 and file2 and file4:
            filename1 = '1 - '+secure_filename(file1.filename)
            filename2 = '2 - '+secure_filename(file2.filename)
            filename3 = '3 - '+secure_filename(file3.filename)
            filename4 = '4 - '+secure_filename(file4.filename)
            file1.save(os.path.join(app.config['UPLOAD_FOLDER'], filename1))
            file2.save(os.path.join(app.config['UPLOAD_FOLDER'], filename2))
            file3.save(os.path.join(app.config['UPLOAD_FOLDER'], filename3))
            file4.save(os.path.join(app.config['UPLOAD_FOLDER'], filename4))

            return "4 files uploaded and saved to drive"

    return '''
    <!doctype html>
    <title>Upload new File</title>
    <h1>Upload new File</h1>
    <form method=post enctype=multipart/form-data>
      1&nbsp;-&nbsp;<input type=file name=file1><br>
      2&nbsp;-&nbsp;<input type=file name=file2><br>
      3&nbsp;-&nbsp;<input type=file name=file3><br>
      4&nbsp;-&nbsp;<input type=file name=file4><br>
      <br>
      <input type=submit value=Upload>
    </form>
    '''


app.run(host='0.0.0.0')
#@app.route('/give_question')