使用Python和GAE对编码的URL查询参数进行不一致的解码

I'm trying to get consistent URL strings in my mobile client before submitting, and on the server once received, to be able to reliably add a hash for security checksum purposes. Currently I'm adding the hash after URL-encoding on the client, and attempting to grab the URL before anything gets decoded on the server, but I'm getting one character (a period) already decoded:I'm trying to get consistent URL strings in my