New Feature: Handle different parameter types in the same path

[kataras]

Hello Iris Community.

Yesterday I've got an e-mail about:

package main

import (
   "github.com/kataras/iris"
)

func main() {
   app := iris.New()
   app.Get("/{id:int}", func(ctx iris.Context) {
      ctx.WriteString("id")
   })
   app.Get("/{str:string}", func(ctx iris.Context) {
      ctx.WriteString("str")
   })
   app.Run(iris.Addr(":8080"))
}

And I answered that we can't handle this yet. However, the person who sent the e-mail gave me a fairly good reason to support this type of routing usage; iris developers in his company would love to use patterns like that, and it will be very helpful if Iris could support this as no other web framework can provide such a feature without performance cost on the rest of the routes.

I am glad to announce that I've just finished this feature and it will be pushed to the upcoming 11.2.3 version.

So something like this could work without any issues (order: top as fallback)

app.Get("/u/{username:string}", func(ctx iris.Context) {
	ctx.Writef("before username (string), current route name: %s\n", ctx.RouteName())
	ctx.Next()
}, func(ctx iris.Context) {
	ctx.Writef("username (string): %s", ctx.Params().Get("username"))
})

app.Get("/u/{id:int}", func(ctx iris.Context) {
	ctx.Writef("before id (int), current route name: %s\n", ctx.RouteName())
	ctx.Next()
}, func(ctx iris.Context) {
	ctx.Writef("id (int): %d", ctx.Params().GetIntDefault("id", 0))
})

app.Get("/u/{uid:uint}", func(ctx iris.Context) {
	ctx.Writef("before uid (uint), current route name: %s\n", ctx.RouteName())
	ctx.Next()
}, func(ctx iris.Context) {
	ctx.Writef("uid (uint): %d", ctx.Params().GetUintDefault("uid", 0))
})

app.Get("/u/{firstname:alphabetical}", func(ctx iris.Context) {
	ctx.Writef("before firstname (alphabetical), current route name: %s\n", ctx.RouteName())
	ctx.Next()
}, func(ctx iris.Context) {
	ctx.Writef("firstname (alphabetical): %s", ctx.Params().Get("firstname"))
})

/*
	/u/abcd maps to :alphabetical (if :alphabetical registered otherwise :string)
	/u/42 maps to :uint (if :uint registered otherwise :int)
	/u/-1 maps to :int (if :int registered otherwise :string)
	/u/abcd123 maps to :string
*/

---

Done with: #1316