使用Lua编写Web端模板引擎的实例代码分享_Lua_

 local insert = table.insert local remove = table.remove local concat = table.concat local format = string.format local loaded = {} local partten = "(.-){#([^#].-[^#])#}()" local content = {} local cur_content = nil local function ob_start() cur_content = {} insert(content, cur_content) end local function ob_get_clean() local ret = concat(cur_content) remove(content) cur_content = content[#content] return ret end local function echo(value) insert(cur_content, value) end local function include(path, params) local bitcode = loaded[path] if not bitcode then local fp = io.open(path, "rb") local template = fp:read('*a') fp:close() local results = {} local last_endpos = 0 for outside, inside, endpos in template:gmatch(partten) do insert(results, format("echo(%q)", outside)) insert(results, inside) last_endpos = endpos end insert(results, format("echo(%q)", template:sub(last_endpos))) results = concat(results, "\n") bitcode = assert(loadstring(results)) loaded[path] = bitcode end local env = { include = include, echo = echo, ob_start = ob_start, ob_get_clean = ob_get_clean } setmetatable(env, {__index = function(tb, k) return params[k] or _G[k] end}) setfenv(bitcode, env) bitcode() end for i = 1, 100000 do ob_start() include(arg[1], { params = { a = '1234', b = '4321' } }) ob_get_clean() end 

 {# echo(header) #}  {# echo(content) #} 

 {# ob_start() #}  {# local header = ob_get_clean() #} {# ob_start() #}  {# for k, v in pairs(params) do #}  {# end #} 
{# echo(k) #}
{# echo(v) #}
 {# local content = ob_get_clean() #} {# include('master.html', {header = header, content = content}) #} 

 [root@AY130801221248587d02Z ~]# time lua ltemplate.lua temp.htmlreal 0m1.867s 

 user 0m1.862s sys 0m0.004s