import hashlib
import os
import socket

def getMD5Hash(file, block_size=2**20):
	f = open(file)
	md5 = hashlib.md5()
	while True:
		data = f.read(block_size)
		if not data:
				break
		md5.update(data)
	md5Hash = md5.hexdigest()
	return md5Hash


def getFileName(file):
	basename = os.path.basename(file) 
	filename = os.path.splitext(basename) 
	return filename[0]


def getMimeType(path):
	if path.endswith(".iso"):
		return "application/x-iso9660-image"
	elif path.endswith(".md5"):
		return "text/plain"

def getClassroomName():
	name = socket.gethostname()
	classname="noclassroomname" 
	hostname=name.strip().split('.')[0].replace('_','-')
	items=hostname.split('-')

	if len(items)==2:
		if len(items[1])==3 and (items[1].upper()=='PRO' or items[1][:1].upper()=='O'):
			classname= items[0]

	return classname