Add support for zip uploads in the API

Fixes #261

app/utils/__init__.py

@@ -13,24 +13,37 @@
 #
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
+import random
+import string
 
 from .flask import *
-from .uploads import *
 from .models import *
 from .user import *
 
 
 YESES = ["yes", "true", "1", "on"]
 
+
 def isYes(val):
 	return val and val.lower() in YESES
 
+
 def isNo(val):
 	return val and not isYes(val)
 
+
 def nonEmptyOrNone(str):
 	if str is None or str == "":
 		return None
 
 	return str
+
+
+def shouldReturnJson():
+	return "application/json" in request.accept_mimetypes and \
+			not "text/html" in request.accept_mimetypes
+
+
+def randomString(n):
+	return ''.join(random.choice(string.ascii_lowercase + \
+			string.ascii_uppercase + string.digits) for _ in range(n))