属性 
lor:
      version
      router
      route
      request
      response
      fn
      app
      create_app
      Router
      Route
      Request
      Response

属性
lor() 或者 App: 
     cache
     settings  --conf函数操作此table设置key --value
     router
     run(final_handler) /---步骤一---/ 
     init(options)
     default_configuration(options)
     handle(req, res, callback) /---步骤二 ---*/
     use(path, fn)  --跳转执行 inner_use(3, path, fn)  -->  (Router:new({})):use(‘/‘, fn, 3)  /**步骤一 **/
     erroruse(path, fn)
     inner_use(fn_args_length, path, fn)
     init_method()--初始化 给自身新增更多的方法
              get = true, -- work well
              post = true, -- work well
              head = true, -- no test
              options = true, -- no test
              put = true, -- work well
              patch = true, -- no test
              delete = true, -- work well
              trace = true, -- no test
              all = true -- todo:
     all(path, fn)
     conf(setting, val)  --设置配置   
     getconf(setting) --获取配置
     enable(setting)--将某项配置开启
     disable(setting)--将某项配置关闭

属性 
Router:
     new(options)   /**步骤二 **/
     name  => 值为 "origin-router-" .. random()
     group_router 
     stack     -- 将把实例化后的Layer对象插入到此table中  /**步骤五 **/
     _call()
    call()
    handle(req, res, out)  /---步骤三 ---*/
    use(path, fn, fn_args_length) -- 新增路由 /**步骤三 **/   
    app_route(path) -- 新增路由
    route(path) -- 新增路由
    init()  --初始化 给自身新增更多的方法 
          get = true, -- work well
          post = true, -- work well
          head = true, -- no test
          options = true, -- no test
          put = true, -- work well
          patch = true, -- no test
          delete = true, -- work well
          trace = true, -- no test
          all = true -- todo:

属性   
Layer: 
     new(path, options, fn, fn_args_length)  /**步骤四 **/
     handle => 值为 fn 
     name => 值为 "layer-" .. random()
     params
     path => 值为 path
     keys
     length => 值为 fn_args_length
     is_end  => 值为 false  
     is_start  => 值为 true  
     pattern => 值为 "/"
     handle_error(err, req, res, next)
     handle_request(req, res, next) 
     match(path) --对每一个路由规则 进行匹配
     

     
属性  
Request
    next  
    new()
    path = ngx.var.uri, -- uri
    method = ngx.req.get_method(),
    query = ngx.req.get_uri_args(),
    params = {},
    body = body,
    body_raw = ngx.req.get_body_data(),
    url = ngx.var.request_uri,
    origin_uri = ngx.var.request_uri,
    uri = ngx.var.request_uri,
    headers = headers, -- request headers 
    req_args = ngx.var.args,
    found = false -- 404 or not
    is_found()
    set_found(found)
    
属性      
Response
    http_status = nil,
    headers = {},
    locals = {},
    body = ‘--default body. you should not see this by default--‘,
    view = nil
    render(view_file, data)
    html(data)
    redirect(url, code, query)
    location(url, data)
    send(text)
    
    
    
main.lua  
  路线一：
  app --> lor()  --执行那个 “函数A”  --> Application.lua文件的返回  返回新table 并将Application类设为新table的元方法  
      注意：Application 下有如下方法 
                          get = true, -- work well
                          post = true, -- work well
                          head = true, -- no test
                          options = true, -- no test
                          put = true, -- work well
                          patch = true, -- no test
                          delete = true, -- work well
                          trace = true, -- no test
                          all = true -- todo: 
                 值等于同一个函数  function(path, fn) 
                                local route = router:app_route(path)
                                route[http_method](route, fn) -- like route:get(fn) 
                                return self
                            end
  
      --> lor.lua文件的返回      传入  一个“函数A“进去  
      --> wrap.lua文件的返回     返回新table    并将wrap类设为新table的元方法  
    
   
  路线二：
  app:use(函数)-->  App:use() 没有返回值  -->  App:inner_use() 返回self
          --> Router:use()  返回self 并设置了 table.insert(self.stack, layer:new())
          -->  Layer:new()  返回新table    并将 Layer类设为新table的元方法
   
  路线三：
  app:run()  --> App:run() --> App:handle()-->router:handle //作者在此函数下了不少功夫.,.....