From 8ec15f9211aafd869aba2697eb4718743ea8be3c Mon Sep 17 00:00:00 2001
From: virusdefender <1670873886@qq.com>
Date: Mon, 28 Mar 2016 17:46:56 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BD=BF=E7=94=A8=E6=9B=B4=E5=BC=BA=E7=9A=84?=
 =?UTF-8?q?=E9=9A=8F=E6=9C=BA=E7=AE=97=E6=B3=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 utils/shortcuts.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/utils/shortcuts.py b/utils/shortcuts.py
index 2f0e1c65..83b95673 100644
--- a/utils/shortcuts.py
+++ b/utils/shortcuts.py
@@ -1,4 +1,5 @@
 # coding=utf-8
+import os
 import hashlib
 import time
 import random
@@ -107,5 +108,6 @@ def paginate(request, query_set, object_serializer=None):
 
 
 def rand_str(length=32):
-    string = hashlib.md5(str(time.time()) + str(random.randrange(1, 987654321234567)) + str(random.randrange(1, 987654321234567))).hexdigest()
-    return string[0:length]
\ No newline at end of file
+    if length > 128:
+        raise ValueError("length must <= 128")
+    return hashlib.sha512(os.urandom(128)).hexdigest()[0:length]
\ No newline at end of file