nginx 图片，js，css等文件允许跨域

location ~ .*\.(gif|jpg|jpeg|png|bmp|swf|flv|mp4|ico)$ { ??#允许跨域请求 ???add_header Access-Control-Allow-Origin ‘*‘; ???add_header Access-Control-Allow-Headers X-Requested-With; ???add_header Access-Control-Allow-Methods GET,POST,OPTIONS; ???expires 30d; ???access_log off; ?}