Question

I’m trying to implement a simple web application server as a personal project to improve my Scala, but I’ve hit upon a problem.

I’d like to be able to set up routes using code like the following:

def routes()
{
    get("/wobble")
    {
        ...many lines of code here...
    }

    get("/wibble")
    {
        ...many lines of code here...
    }

    post("/wibble")
    {
        ...many lines of code here...
    }

    post("/wobble")
    {
        ...many lines of code here...
    }
}

routes is called by the server when it starts and get and post are functions defined by me like this:

get(url:String)(func:()=>String)=addroute("GET",url,func)
post(url:String(func:()=>String)=addroute("POST",url,func)

addroute(method:String,url:String,f:()=>String)
{
    routesmap+=(method->Map[String,()=>String](url,func))
}

Unfortunately, I’ve had nothing but problems with this. Could anyone tell me the correct way in Scala to add an anonymous function (as passed in as a parameter in the defined routes function above) to a Map (or any other Scala collection for that matter)?

Answer 1

May be, this one ? :

type Fonc = ( (=> String) => Unit)

var routesmap = Map[String,Map[String,()=>String]]()

def addRoute(method:String,url:String,f:()=>String) = {     

routesmap+=(method-> (routesmap.getOrElse(method,Map[String,()=>String]()) + (url->f)))

}

def get(url:String):Fonc = (x => addRoute("GET",url,() => x))
def post(url:String):Fonc = (x => addRoute("POST",url,() => x))

def routes() 
{
post("/wobble")
{
"toto"
}

get("/wibble")
{
"titi"
}

}