FIX: get_url bug
FIX: get_url bug

njuaplusplus/duoshuo-python-sdk,duoshuo/duoshuo-python-sdk,njuaplusplus/duoshuo-python-sdk,irwinlove/duoshuo-python-sdk,1f9763/duoshuo-python-sdk,1f9763/duoshuo-python-sdk,irwinlove/duoshuo-python-sdk