Upload a PDF to Convert to Word

from flask import Flask, request, send_file
from pdf2docx import Converter
import os

app = Flask(__name__)
UPLOAD_FOLDER = './uploads'
CONVERTED_FOLDER = './converted'
ALLOWED_EXTENSIONS = {'pdf'}

if not os.path.exists(UPLOAD_FOLDER):
    os.makedirs(UPLOAD_FOLDER)

if not os.path.exists(CONVERTED_FOLDER):
    os.makedirs(CONVERTED_FOLDER)

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

@app.route('/')
def upload_form():
    return '''
    <!doctype html>
    <title>Upload a PDF to Convert</title>
    <h1>Upload a PDF to Convert to Word</h1>
    <form method=post enctype=multipart/form-data>
      <input type=file name=file>
      <input type=submit value=Upload>
    </form>
    '''

@app.route('/', methods=['POST'])
def upload_file():
    if 'file' not in request.files:
        return 'No file part'
    file = request.files['file']
    if file.filename == '':
        return 'No selected file'
    if file and allowed_file(file.filename):
        filepath = os.path.join(UPLOAD_FOLDER, file.filename)
        file.save(filepath)
        docx_filename = os.path.splitext(file.filename)[0] + '.docx'
        docx_filepath = os.path.join(CONVERTED_FOLDER, docx_filename)
        converter = Converter(filepath)
        converter.convert(docx_filepath)
        converter.close()
        os.remove(filepath)  # Remove the uploaded PDF
        return send_file(docx_filepath, as_attachment=True)
    return 'Invalid file type'

if __name__ == '__main__':
    app.run(debug=True)