response to a range request with python Flask framework

sendfile.py

from flask import Response, request
from werkzeug.datastructures import Headers
from time import time
from re import findall

def send_file(musicFile , cachetimout, stream=True):
	headers = Headers()
	headers.add('Content-Disposition', 'attachment', filename=musicFile.filename)
	headers.add('Content-Transfer-Encoding','binary')

	status = 200
	size   = getsize(musicFile.path)
	begin  = 0;
	end    = size-1;

	if request.headers.has_key("Range") and rangerequest:
		status = 206
		headers.add('Accept-Ranges','bytes')
		ranges = findall(r"\d+", request.headers["Range"])
		begin  = int( ranges[0] )
		if len(ranges)>1:
			end = int( ranges[1] )
		headers.add('Content-Range','bytes %s-%s/%s' % (str(begin),str(end),str(end-begin)) )
	
	headers.add('Content-Length',str((end-begin)+1))
	
	#Add mimetype	
	mimetypes = {u"mp3":"audio/mpeg",u"ogg":"audio/ogg"}
	if stream==True:
		mimetype = mimetypes[musicFile.filetype]
	else:
		mimetype = "application/octet-stream"
	
	response = Response( file(musicFile.path), status=status, mimetype=mimetype, headers=headers, direct_passthrough=True)
	
	#enable browser file caching with etags
	response.cache_control.public  = True
	response.cache_control.max_age = int(cachetimout)
	response.last_modified         = int(musicFile.changetime)
	response.expires               = int( time() + int(cachetimout) )
	response.set_etag('%s%s' % ( musicFile.id,musicFile.changetime ))
	response.make_conditional(request)
	
	return response