vk dympy 2

#!/usr/bin/python

# Let's follow GPL:
# I'm using some code by PabloG from Stackoverflow

import sys
import os
import urllib2
from os import listdir
from os.path import isfile, join

def get_html_name():
    onlyfiles = [ f for f in listdir(os.getcwd()) if isfile(join(os.getcwd(),f)) ]
    for x in xrange(0, len(onlyfiles)):
        if(onlyfiles[x].find(".html") != -1):
            return onlyfiles[x]
    return None

def download_file(url, file_name):
    u = urllib2.urlopen(url)
    local_file_size = 0
    if(os.path.isfile(file_name) == True):
        local_file_size = os.stat(file_name).st_size
    meta = u.info()
    file_size = long(meta.getheaders("Content-Length")[0])
    if ( file_size == local_file_size):
        return None
    f = open(file_name, 'wb')
    file_size_dl = 0
    block_sz = 8192
    while True:
        buffer = u.read(block_sz)
        if not buffer:
            break
        file_size_dl += len(buffer)
        f.write(buffer)
        status = r"%10d Kb  [%3.2f%%] %s" % (file_size_dl/1024, file_size_dl * 100. / file_size, file_name)
        status = status + chr(8)*(len(status)+1)
        print status,
    f.close()
    print("")
    return None

def get_band_name(inc_str):
    pattern1='return false">'
    n=""
    for x in xrange((inc_str.find(pattern1)+len(pattern1)),len(inc_str)):
            if(inc_str[x] != "<"):
                    n+=inc_str[x]
            else:
                    break
    return n

def get_song_name(inc_str):
    i=len(inc_str)-1
    found = 0
    n=""
    while i > 0 and found == 0:
        if inc_str[i] == ">":
            if inc_str[i-7]+inc_str[i-6]+inc_str[i-5]+inc_str[i-4]+inc_str[i-3]+inc_str[i-2]+inc_str[i-1] == " </span":
                j=i-8
                while inc_str[j-1] + inc_str[j] != "\">":
                    n+=inc_str[j]
                    j=j-1
                found = 1
        i=i-1
    n=n[::-1]
    n1=n.split("</a>")
    return n1[0]

    pattern1='return false">'
    for x in xrange((inc_str.find(pattern1)+len(pattern1)),len(inc_str)):
            if(inc_str[x] != "<"):
                    n+=i_str[x]
            else:
                    break
    return n

def get_url(inc_str):
    pattern1="https://"
    n=""
    for x in xrange(inc_str.find(pattern1),len(inc_str)):
            if(inc_str[x] != ","):
                    n+=inc_str[x]
            else:
                    break
    return n

def get_flag(flag):
    for x in xrange(0,len(sys.argv)):
        if sys.argv[x] == flag:
            return True
    return False


def get_option(option):
    for x in xrange(0,len(sys.argv)):
        if sys.argv[x] == option:
            if x+1 < len(sys.argv):
                return sys.argv[x+1]
    return None

def filter_name(name):
    result=""
    special="<>:\"/\|?*"
    for x in xrange(0,len(name)):
        if special.find(name[x]) == -1:
            result += name[x]
        else:
            result += "_"
    return result

def list_file(url, name):
    print name
    return None

def show_help():
    print "\ndum.py is MP3 downloader for vk.com\n"
    print "USAGE:\n\tdum.py [options]"
    print "\n\tIf no options given, all files from instance\n\tof vk.com/audio.html found in current directory\n\twill be downloaded.\n\tThis means, you have to save an HTML page vk.com/audio to directory.\n"
    print "\t-h  Show this help\n"
    print "\t-L  List contents.\n\t\tIf flag is set, files will be listed\n\t\tonly, otherwise they will be downloaded.\n"
    print "\t-m [MATCH]  List/download every file, that has MATCH in it's name\n"
    return None

# EXECUTION
filename = ""
if len(sys.argv) == 2:
    filename=sys.argv[1]
else:
    filename=get_option("-f")
if not (filename != None and os.path.isfile(filename) and filename.find(".htm") != -1):
    filename = get_html_name()
l_url=""
if filename != None:
    match = get_option("-m")
    only_list = get_flag("-L")
    only_help = get_flag("-h")
    if( only_help == True ):
        show_help()
        sys.exit(0)
    if( only_list ==  True ):
        file_action = list_file
    else:
        file_action = download_file
    # print filename
    vk_file = open(filename, "r")
    line = vk_file.readline()
    while (line != None) and (line != ""):
        line=line.decode('cp1251').encode('utf8')
        if(line.find("<input type=\"hidden\" id=\"audio_info") != -1):
            l_url=get_url(line)
            trash=vk_file.readline()
            trash=vk_file.readline()
            name_line=vk_file.readline()
            name_line=name_line.decode('cp1251').encode('utf8')
            band=filter_name(get_band_name(name_line))
            song=filter_name(get_song_name(name_line))
            if (band != None and song != None and l_url != None):
                if(match != None):
                    if (band.find(match) != -1 or song.find(match) != -1):
                        # print band + "\t" +  song + "\t" + l_url
                        file_action(l_url, band + " - " + song + ".mp3")
                else:
                    file_action(l_url, band + " - " + song + ".mp3")
                    #print band + "\t" +  song + "\t" + l_url
        line=vk_file.readline()
else:
    print "ERROR: No html files found"
    show_help()