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#!/usr/bin/python
# -*- coding: utf-8 -*-

import cgi, cgitb, os, sys, subprocess, json, urllib
from datetime import datetime
from random import randrange
from urllib.request import urlopen
import subprocess

#from urlparse import urlparse, parse_qs
try:
    from urllib.parse import urlparse
    from urllib.parse import parse_qs
except ImportError:
    from urlparse import urlparse, parse_qs

UPLOAD_DIR = 'files/sessions'
if not os.path.isdir(UPLOAD_DIR):
    cmd = 'mkdir -p "' + UPLOAD_DIR + '"'
    stream = os.popen(cmd)

form = cgi.FieldStorage()

def print_html_head():
    print ('Content-Type: text/html; charset=UTF-8')
    print ('')
    print ('''
    <html>
    <head>
      <title>Upload File</title>
    </head>
    <body>
''')

def print_json_head():
    print ("Content-Type: application/json; charset=UTF-8\n")

def print_form():
    print ('''
  <h1>Upload File</h1>
  <form action="play.py" method="POST" enctype="multipart/form-data">
	Pass: <input name="pass" type="password"><br><br>
    File: <input name="file" type="file">
    <br><br>
    <input name="submit" type="submit">
  </form>
''')

def save_offsets():
    jstr = ''
    output = ''
    for key in form.keys():
        if key != 'action' and key != 'sessionid':
# Shift audio offset in json file
            fpath = os.path.join(UPLOAD_DIR, SESSIONID, key + ".16.json")
            value = float(form.getvalue(key))
            if os.path.isfile(fpath):
                    jstr = jstr + ', "' + key + '": ' + str(value)
                    f = open(fpath)
                    data = json.load(f)
                    data['offset'] = value
                    f.close()
                    json_object = json.dumps(data, indent=4)
                    with open(fpath, 'w') as fout:
                        fout.write (json_object)
# Now shift subtitles in vtt file
            fpath = os.path.join(UPLOAD_DIR, SESSIONID, key + ".16.vtt")
            if os.path.isfile(fpath):
                opath = os.path.join(UPLOAD_DIR, SESSIONID, key + ".16.orig.vtt")
# Copy original file for future shifts if it does not exist
                if not os.path.isfile(opath):
                    cmd = 'cp "' + fpath + '" "' + opath + '"'
                    stream = os.popen(cmd)
# Copy original file to new file for processing
                else:
                    cmd = 'cp "' + opath + '" "' + fpath + '"'
                    stream = os.popen(cmd)
# Do the actual shifting using pysubs2
                cmd = "shift"
                val = value
                if value < 0:
                    cmd = "shift-back"
                    val = -1 * value

                cmd = '/usr/local/bin/pysubs2 --' + cmd + ' ' + str(val) + 's "' + fpath + '"'
                stream = os.popen(cmd)
                output = stream.read()


    return '{"status": "OK" ' + jstr + '}' + output

def save_uploaded_file():
    if not 'file' in form:
        print ('{"status": "Error", "message": "No file"}')
        return
    form_file = form['file']
    if not form_file.file:
        print ('{"status": "Error", "message": "No file"}')
        return
    if not 'pass' in form:
        print ('{"status": "Error", "message": "No pass"}')
        return
    form_pass = form['pass'].value
    if not form_pass or (form_pass != 'stadionalle'):
        print ('{"status": "Error", "message": "Please provide a valid pass"}')
        return
    if not form_file.filename:
        print ('{"status": "Error", "message": "No file name"}')
        return
    if not ( form_file.filename.endswith(".wav")
             or form_file.filename.endswith(".mp4")
             or form_file.filename.endswith(".mp3") ):
        print ('{"status": "Error", "message": "No file name"}')
        return

    fname = os.path.basename(form_file.filename.replace(" ", "_"))
    fname = fname.replace(":", "-")
    uploaded_file_path = os.path.join(UPLOAD_DIR, fname)
    with open(uploaded_file_path, 'wb') as fout:
        i = 0
        mess = '{"status": "OK", "message": "File uploaded"}'
        while True:
            chunk = form_file.file.read(100 * 1024)
            if not chunk:
                break
            fout.write (chunk)
            i = i+1
            if i>10 * 20:
                mess = '{"status": "Error", "message": "File is too big (> 20mb)"}'
                fout.close
                cmd = 'cd ' + UPLOAD_DIR + ' && rm "' + fname+ '"'
                stream = os.popen(cmd)
                break
        print (mess)
    # try:
	#     subprocess.check_output(['/bin/bash', '/home/stabile/upload/s3.sh', 'files/' + form_file.filename.replace(" ", "_")])
    # except subprocess.CalledProcessError:
    # 	print "Got an error"
    #
    # print ('<h1>Completed S3 upload</h1>')

def list_files(path):
    datetime_object = datetime.fromtimestamp(os.path.getmtime(path))
    d = {'name': os.path.basename(os.path.splitext(path)[0]), 'date':datetime_object.strftime("%d/%m/%Y, %H:%M:%S"), 'action': '', 'lang': '', 'offset': 0}
    if os.path.isdir(path):
        d['type'] = "directory"
        d['size'] = 0
        d['children'] = []
        for x in os.listdir (path):
            type = os.path.splitext(x)[1][1:]
            if os.path.isdir(os.path.join(path, x)): # Stop recursion
                d['children'].append({'name': x, 'type': 'directory', 'size': 0, 'date': 0, 'lang': ''})
            if (type == 'mp4' or type == 'mp3' or type == 'wav') and not '.16.wav' in x:
                d['children'].append(list_files(os.path.join(path, x)))
    else:
        file_size = os.path.getsize(path)
        type = os.path.splitext(path)[1][1:]
        d['offset'] = 0
        if type == 'wav' and os.path.isfile(path.replace(".wav", ".16.vtt")):
            d['processed'] = True
        if type == 'mp3' and os.path.isfile(path.replace(".mp3", ".16.vtt")):
            d['processed'] = True
        if type == 'wav' and os.path.isfile(path.replace(".wav", ".16.json")):
            f = open(path.replace(".wav", ".16.json"))
            data = json.load(f)
            d['lang'] = data['language']
            if "offset" in data:
                d['offset'] = data['offset']
            f.close()
        if type == 'mp3' and os.path.isfile(path.replace(".mp3", ".16.json")):
            f = open(path.replace(".mp3", ".16.json"))
            data = json.load(f)
            d['lang'] = data['language']
            if "offset" in data:
                d['offset'] = data['offset']
            f.close()
        d['type'] = type
        d['size'] = file_size
    return d

def delete_file(file):
    file = file.replace("..", "") # a bit of sanitizing
    file = file.replace("/", "")
    msg = ""
    status = "Error"
    type = os.path.splitext(file)[1][1:]
    try:
        subprocess.check_output(['/usr/bin/rm', UPLOAD_DIR + "/" + file])
        fname = ''
        if type == 'wav' and os.path.isfile(UPLOAD_DIR + "/" + file.replace('.wav', '.16.wav')):
            fname = file.replace('.wav','')
        if type == 'mp3' and os.path.isfile(UPLOAD_DIR + "/" + file.replace('.mp3', '.16.wav')):
            fname = file.replace('.mp3','')
        if fname != '':
            subprocess.check_output(['/usr/bin/rm', UPLOAD_DIR + "/" + fname + '.16.wav'])
            subprocess.check_output(['/usr/bin/rm', UPLOAD_DIR + "/" + fname + '.16.json'])
            subprocess.check_output(['/usr/bin/rm', UPLOAD_DIR + "/" + fname + '.16.vtt'])
            subprocess.check_output(['/usr/bin/rm', UPLOAD_DIR + "/" + fname + '.16.srt'])
            subprocess.check_output(['/usr/bin/rm', UPLOAD_DIR + "/" + fname + '.16.txt'])
            subprocess.check_output(['/usr/bin/rm', UPLOAD_DIR + "/" + fname + '.16.tsv'])
        status = "OK"
        msg = file + " was removed"
    except subprocess.CalledProcessError:
        msg = "Got an error"
    return '{"status": "' + status + '", "message": "' + msg + '"}'

def download_video():
    msg = ""
    status = "Error"
    purl = "https://pixabay.com/api/videos/?key=36793478-80856bd1430647d240abec315&q=soccer"
    try:
        data = urlopen(purl).read()
        jdata = json.loads(data)
        url = jdata['hits'][randrange(20)]['videos']['medium']['url']
        cmd = 'cd ' + UPLOAD_DIR + ' && curl -k -L -O -J "' + url + '"'
        stream = os.popen(cmd)
        output = stream.read()
        status = "OK"
        msg = url + " was downloaded. " + output
    except subprocess.CalledProcessError:
        msg = "Got an error"
    return '{"status": "' + status + '", "message": "' + msg + '", "url": "' + url + '"}'

def download_audio():
    cmd = './podcast.sh'
    stream = os.popen(cmd)
    purl = stream.read()
    try:
        filename = "audio" + str(randrange(1000))
        cmd = 'cd ' + UPLOAD_DIR + ' && wget -O "' + filename + '.mp3" "' + purl + '"'
#        subprocess.run([cmd])
        stream = os.popen(cmd)
        output = stream.read()
        cmd = 'ffmpeg -ss 20 -to 50 -i "' + UPLOAD_DIR + '/' + filename + '.mp3" "' + UPLOAD_DIR + '/' + filename + '-30.mp3"'
#        subprocess.run([cmd])
        stream = os.popen(cmd)
        output = stream.read()
        os.remove(UPLOAD_DIR + '/' + filename + '.mp3')
        status = "OK"
        msg = purl + " was downloaded. " + output
    except subprocess.CalledProcessError:
        msg = "Got an error"
    return '{"status": "' + status + '", "message": "' + msg + '", "url": "' + purl + '"}'

def process_audio(file):
    file = file.replace("..", "") # a bit of sanitizing
    file = file.replace("/", "")
    msg = ""
    status = "Error"
    try:
        file16 = file.replace("wav","16.wav")
        file16 = file16.replace("mp3","16.wav")
        cmd = 'echo -y | /usr/bin/ffmpeg -i "' + UPLOAD_DIR + '/' + file + '" -acodec pcm_s16le -ac 1 -ar 16000 "' + UPLOAD_DIR + '/' + file16 + '"'
#        os.system(cmd)
        stream = os.popen(cmd)
#        output = stream.read()
        cmd = 'cd ' + UPLOAD_DIR +  '; /usr/local/bin/whisper "' + file16 + '"'
        stream = os.popen(cmd)
        status = "OK"
        msg = file + " was processed"
    except subprocess.CalledProcessError:
        msg = "Got an error"
    return '{"status": "' + status + '", "message": "' + msg + '"}'

cgitb.enable()
SESSIONID = ''
method = os.environ.get('REQUEST_METHOD', '')
query_string = os.environ.get('QUERY_STRING', '')
content_len = os.environ.get('CONTENT_LENGTH', '0')
args = parse_qs(query_string)

if method == 'POST':
    if not 'sessionid' in form:
        print_json_head()
        print ('{"status": "Error", "message": "No sessionid"}')
    else:
        SESSIONID = form['sessionid'].value
        if query_string:
            if args['action'] and args['action'][0] == 'saveoffsets':
                print_json_head()
                print (save_offsets() )
        else:
                UPLOAD_DIR = UPLOAD_DIR + "/" +  SESSIONID
                print_json_head()
                save_uploaded_file()
elif method == 'GET':
    if 'action' in args and args['action'] == ['listsessions']:
        print_json_head()
        print (json.dumps(list_files(UPLOAD_DIR)))
    else:
        if not 'sessionid' in args:
            print_json_head()
            print ('{"status": "Error", "message": "No sessionid"}')
        else:
            if args['sessionid'] == '':
                print_json_head()
                print ('{"status": "Error", "message": "Empty sessionid"}')
            else:
                SESSIONID = args['sessionid'][0]
                SESSIONID =  SESSIONID.replace(".", "")
                SESSIONID =  SESSIONID.replace("/", "-")
                SESSIONID =  SESSIONID.replace(" ", "-")
                UPLOAD_DIR = UPLOAD_DIR + "/" + SESSIONID
                if 'action' in args:
                    if args['action'] == ['createsession']:
                        print_json_head()
                        if os.path.isdir(UPLOAD_DIR + "/" + SESSIONID):
                            print ('{"status": "Error", "message": "Session with this name already exists"}')
                        else:
                            subprocess.check_output(['mkdir', UPLOAD_DIR])
                            print ('{"status": "OK", "message": "Session created", "sessionid": "' + SESSIONID + '"}')
                    if args['action'] == ['deletesession']:
                        print_json_head()
                        if not os.path.isdir(UPLOAD_DIR):
                            print ('{"status": "Error", "message": "Session with this does not exist: ' + SESSIONID + '"}')
                        else:
                            stream = os.popen('rm -rf ' + UPLOAD_DIR)
                            print ('{"status": "OK", "message": "Session deleted", "sessionid": "' + SESSIONID + '"}')
                    elif args['action'] == ['list']:
                        print_json_head()
                        print (json.dumps(list_files(UPLOAD_DIR)) )
                    elif args['action'] == ['downloadvideo']:
                        print_json_head()
                        print (download_video() )
                    elif args['action'] == ['downloadaudio']:
                        print_json_head()
                        print (download_audio() )
                    elif args['action'] == ['deletefile']:
                        print_json_head()
                        print (delete_file(args['file'][0]) )
                    elif args['action'] == ['processaudio']:
                        print_json_head()
                        print (process_audio(args['file'][0]) )
                else:
                    print_html_head()
                    print_form()

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