Mercurial > urweb
view tests/policy2.ur @ 2007:d3a0f2b8af28
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author | Adam Chlipala <adam@chlipala.net> |
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date | Wed, 30 Apr 2014 13:05:54 -0400 |
parents | d5ecceb7d1a1 |
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type fruit = int table fruit : { Id : fruit, Nam : string, Weight : float, Secret : string } PRIMARY KEY Id, CONSTRAINT Nam UNIQUE Nam (* Everyone may knows IDs and names. *) policy sendClient (SELECT fruit.Id, fruit.Nam FROM fruit) (* The weight is sensitive information; you must know the secret. *) policy sendClient (SELECT fruit.Weight, fruit.Secret FROM fruit WHERE known(fruit.Secret)) fun main () = x1 <- queryX (SELECT fruit.Id, fruit.Nam FROM fruit WHERE fruit.Nam = "apple") (fn x => <xml><li>{[x.Fruit.Id]}: {[x.Fruit.Nam]}</li></xml>); return <xml><body> <ul>{x1}</ul> </body></xml>