refine "http_simple" in py3.4
refine "http_simple" in py3.4

yalewoosoft/shadowsocks,ZeroClover/shadowsocksr,shadowsocksr-backup/shadowsocksr,miyouzi/ch-docker-ssr,monokoo/shadowsocks,shadowsocksR-private/shadowsocksR,kaneawk/shadowsocksr,loveward/yingsuo,shadowsocksR-private/shadowsocksR,miyouzi/ch-docker-ssr,shadowsocksr-backup/shadowsocksr,monokoo/shadowsocks,kaneawk/shadowsocksr,loveward/yingsuo,yalewoosoft/shadowsocks