nginx的location优先级顺序

location的优先级和所在前后无关，而是和以下匹配符有关

(location =) > (location 完整路径) > (location ^~ 路径) > (location ~,~* 正则顺序) > (location 部分起始路径) > (/)

具体请看：
http://blog.csdn.net/xy2204/article/details/47749405