lua 解析url，luaurl

lua 解析url，luaurl

 --获取路径
function stripfilename(filename)
         return string.match(filename, "(.+)/[^/]*%.%w+$") --*nix system
         --return string.match(filename, “(.+)\\[^\\]*%.%w+$”) — windows
 end
--获取文件名
function strippath(filename)
         return string.match(filename, ".+/([^/]*%.%w+)$") -- *nix system
         --return string.match(filename, “.+\\([^\\]*%.%w+)$”) — *nix system
 end
--去除扩展名
function stripextension(filename)
         local idx = filename:match(".+()%.%w+$")
         if(idx) then
                 return filename:sub(1, idx-1)
         else
                 return filename
         end
 end
--获取扩展名
function getextension(filename)
         return filename:match(".+%.(%w+)")
 end
 local paths = "/use/local/openresty/nginx/movies/fffff.tar.gz"
 print (stripfilename(paths))
 print (strippath(paths))
 print (stripextension(paths))
 print (getextension(paths))
 [root@localhost cdnlua]# lua testfile.lua
 /use/local/openresty/nginx/movies
 fffff.tar.gz
 /use/local/openresty/nginx/movies/fffff.tar
 gz