upload.py

import os
from flask import Flask, request, redirect, url_for, flash,send_file, render_template, send_from_directory
from werkzeug.utils import secure_filename
import requests
from audio_cleaner import clean_audio

#UPLOAD_FOLDER is where we will store the uploaded files
UPLOAD_FOLDER = "/home/kian/ML/SBHacks/explitive_files"
#allowed format
ALLOWED_EXTENSIONS = set(['mp3','wav'])
downloadFilePos=""

app = Flask(__name__)
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
app.config['SECRET_KEY']="UPLOAD"

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

@app.route('/', methods=['GET', 'POST'])
def upload_file():
    if request.method == 'POST':
        # check if the post request has the file part
        if 'file' not in request.files:
            flash('No file part')
            return redirect(request.url)
        file = request.files['file']
        # if user does not select file, browser also
        # submit a empty part without filename
        if file.filename == '':
            flash('No selected file')
            return redirect(request.url)
        if file and allowed_file(file.filename):
            # filename = secure_filename(file.filename)#use secure_filename function for safety
            filename=file.filename
            file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
            downloadFilePos=filename

            new_audio_name = clean_audio(app.config['UPLOAD_FOLDER'] + "/" + filename, "em_lyrics.txt")
            # return redirect(url_for('uploaded_file',filename=filename))
            return render_template('index.html', display="block")
    return render_template('index.html', display="none")

@app.route('/uploads/<filename>')
def uploaded_file(filename):
    return send_from_directory('//home/kian/ML/SBHacks/clean_files', filename, as_attachment=True)

# download from the Internet
@app.route('/uploads/test_download_Net/<filename>')
def download_file(url_addr):
    url = url_addr  # user provides url in query string
    r = requests.get(url, allow_redirects=True)

    # write to a file in the app's instance folder
    # come up with a better file name
    with app.open_instance_resource('downloaded_file', 'wb') as f:
        f.write(r.content)

@app.route('/uploads/<path:filename>', methods=['GET', 'POST'])
def download(filename):
    if request.method == "GET":
        if os.path.isfile(os.path.join('/home/kian/ML/SBHacks/clean_files', filename)):
            return send_from_directory('//home/kian/ML/SBHacks/clean_files', filename, as_attachment=True)

if __name__ == "__main__":
    app.run()