make call of str.decode compatible with python 2.6
make call of str.decode compatible with python 2.6

qiulimao/weblocust,wonderay/pyspider,e-dorigatti/pyspider,qiulimao/weblocust,wonderay/pyspider,machinewu/pyspider,nicozhang/pyspider,snakeliwei/pyspider,luotao19861229/pyspider,lashwang/pyspider,lashwang/pyspider,jjyycchh/pyspider,luoq/pyspider,e-dorigatti/pyspider,wangjun/pyspider,eromoe/pyspider,luoq/pyspider,VDuda/pyspider,jjyycchh/pyspider,nicozhang/pyspider,wangjun/pyspider,luotao19861229/pyspider,e-dorigatti/pyspider,luoq/pyspider,nicozhang/pyspider,lashwang/pyspider,qiulimao/weblocust,jjyycchh/pyspider,snakeliwei/pyspider,machinewu/pyspider,VDuda/pyspider,binux/pyspider,binux/pyspider,binux/pyspider,machinewu/pyspider,eromoe/pyspider,wonderay/pyspider,wangjun/pyspider,eromoe/pyspider,luotao19861229/pyspider,snakeliwei/pyspider,VDuda/pyspider