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package main
import (
"net/http"
"strings"
"github.com/kataras/iris"
)
// In this example you'll just see one use case of .WrapRouter.
// You can use the .WrapRouter to add custom logic when or when not the router should
// be executed in order to execute the registered routes' handlers.
//
// To see how you can serve files on root "/" without a custom wrapper
// just navigate to the "file-server/single-page-application" example.
//
// This is just for the proof of concept, you can skip this tutorial if it's too much for you.
func newApp() *iris.Application {
app := iris.New()
app.OnErrorCode(iris.StatusNotFound, func(ctx iris.Context) {
ctx.HTML("<b>Resource Not found</b>")
})
app.Get("/", func(ctx iris.Context) {
ctx.ServeFile("./public/index.html", false)
})
app.Get("/profile/{username}", func(ctx iris.Context) {
ctx.Writef("Hello %s", ctx.Params().Get("username"))
})
// serve files from the root "/", if we used .StaticWeb it could override
// all the routes because of the underline need of wildcard.
// Here we will see how you can by-pass this behavior
// by creating a new file server handler and
// setting up a wrapper for the router(like a "low-level" middleware)
// in order to manually check if we want to process with the router as normally
// or execute the file server handler instead.
// use of the .StaticHandler
// which is the same as StaticWeb but it doesn't
// registers the route, it just returns the handler.
fileServer := app.StaticHandler("./public", false, false)
// wrap the router with a native net/http handler.
// if url does not contain any "." (i.e: .css, .js...)
// (depends on the app , you may need to add more file-server exceptions),
// then the handler will execute the router that is responsible for the
// registered routes (look "/" and "/profile/{username}")
// if not then it will serve the files based on the root "/" path.
app.WrapRouter(func(w http.ResponseWriter, r *http.Request, router http.HandlerFunc) {
path := r.URL.Path
// Note that if path has suffix of "index.html" it will auto-permant redirect to the "/",
// so our first handler will be executed instead.
if !strings.Contains(path, ".") { // if it's not a resource then continue to the router as normally.
router(w, r)
return
}
// acquire and release a context in order to use it to execute
// our file server
// remember: we use net/http.Handler because here we are in the "low-level", before the router itself.
ctx := app.ContextPool.Acquire(w, r)
fileServer(ctx)
app.ContextPool.Release(ctx)
})
return app
}
func main() {
app := newApp()
// http://localhost:8080
// http://localhost:8080/index.html
// http://localhost:8080/app.js
// http://localhost:8080/css/main.css
// http://localhost:8080/profile/anyusername
app.Run(iris.Addr(":8080"))
// Note: In this example we just saw one use case,
// you may want to .WrapRouter or .Downgrade in order to bypass the iris' default router, i.e:
// you can use that method to setup custom proxies too.
//
// If you just want to serve static files on other path than root
// you can just use the StaticWeb, i.e:
// .StaticWeb("/static", "./public")
// ________________________________requestPath, systemPath
}