修复哈希值出错的问题

utils.py

@@ -274,12 +274,7 @@ def submit_key(key):
 
 def sha1sum(filename):
     sha1 = hashlib.sha1()
-    with open(filename, "rb") as f:
-        while True:
-            data = f.read(65536)
-            if not data:
-                break
-            sha1.update(data)
+    sha1.update(filename.encode("utf-8"))
     return sha1.hexdigest()