Question

我的应用会记录网址请求，例如：＆＃34; / Users / Edit＆＃34;，＆＃34; / News /＆＃34;和＆＃34; /＆＃34;。
几乎所有的网址都可以通过web-api获得，它有一个＆＃34; / api＆＃34;在一切之前。

我需要一个

的查询

给出＆＃34; / Users / Edit /＆＃34;我得到了＃34;用户＆＃34;和＆＃34;编辑＆＃34; （只要结果不变，可选/）
给予＆＃34; /用户/＆＃34;我得到了＃34;用户＆＃34;和NULL
给出＆＃34; /＆＃34;我得到NULL和NULL
给出＆＃34; /Content/myCss.css"我得到了内容＆＃34;和（NULL或＆＃34; myCss.css＆＃34;）
忽略＆＃34; / api＆＃34;

基本上，我想要的是获取控制器和该URL文本的动作......

Answer 1

你几乎完成了它。尝试一下xml。

-- Sample data.
declare @URLs as Table ( URL VarChar(256), Controller VarChar(256), [Action] VarChar(256) );
insert into @URLs ( URL ) values
  ( '/Users/Edit/' ),
  ( '/Users/' ),
  ( '/' ),
  ( '/Content/myCss.css' ),
  ( '/api/Users/Edit/' ),
  ( '/api/Users/' ),
  ( '/api/' ),
  ( '/api/Content/myCss.css' );
select * from @URLs;

-- Flog it into submission.
select URL, XMLURL, Ele2, Ele3, Ele4, Leonard.Controller, Leonard.[Action]
  from @URLs as U cross apply
    ( select Cast( '<root><ele>' + Replace( URL, '/', '</ele><ele>' ) + '</ele></root>' as XML ) as XMLURL ) as XU cross apply
    ( select XMLURL.value('(/root/ele)[2]', 'varchar(256)') as Ele2,
      XMLURL.value('(/root/ele)[3]', 'varchar(256)') as Ele3,
      XMLURL.value('(/root/ele)[4]', 'varchar(256)') as Ele4 ) as XE cross apply
    ( select NullIf( case when Ele2 = 'api' then Ele3 else Ele2 end, '' ) as Controller,
      NullIf( case when Ele2 = 'api' then Ele4 else Ele3 end, '' ) as [Action] ) as Leonard;

-- Update the table.
update U
  set Controller = Leonard.Controller, [Action] = Leonard.[Action]
    from @URLs as U cross apply
    ( select Cast( '<root><ele>' + Replace( URL, '/', '</ele><ele>' ) + '</ele></root>' as XML ) as XMLURL ) as XU cross apply
    ( select XMLURL.value('(/root/ele)[2]', 'varchar(256)') as Ele2,
      XMLURL.value('(/root/ele)[3]', 'varchar(256)') as Ele3,
      XMLURL.value('(/root/ele)[4]', 'varchar(256)') as Ele4 ) as XE cross apply
    ( select NullIf( case when Ele2 = 'api' then Ele3 else Ele2 end, '' ) as Controller,
      NullIf( case when Ele2 = 'api' then Ele4 else Ele3 end, '' ) as [Action] ) as Leonard;

select * from @URLs;

这个概念是将每个URL转换为XML，路径上的每个元素都是一个单独的XML元素。由于可以使用XML.value通过索引访问元素，因此很容易选择前几个元素，使用'api'忽略case，并使用{{1将任何空字符串转换为空值}}

对于那些只了解T-SQL辩证法的人，要求每行以非数字非字母字符开头，提供了初始示例的大写翻译：

NullIf

TSQL - 来自URL的控制器和操作

1 个答案: