Quick start

Create an empty file, let's assume its name is example.go, then open it and copy-paste the below code.

package main
import "github.com/kataras/iris/v12"
func main() {
app := iris.Default()
app.Use(myMiddleware)
app.Handle("GET", "/ping", func(ctx iris.Context) {
ctx.JSON(iris.Map{"message": "pong"})
})
// Listens and serves incoming http requests
// on http://localhost:8080.
app.Listen(":8080")
}
func myMiddleware(ctx iris.Context) {
ctx.Application().Logger().Infof("Runs before %s", ctx.Path())
ctx.Next()
}

Start a terminal session and execute the following.

# run example.go and visit http://localhost:8080/ping on browser
$ go run example.go

Show me more!

Let's take a small overview of how easy is to get up and running.

package main
import "github.com/kataras/iris/v12"
func main() {
app := iris.New()
// Load all templates from the "./views" folder
// where extension is ".html" and parse them
// using the standard `html/template` package.
app.RegisterView(iris.HTML("./views", ".html"))
// Method: GET
// Resource: http://localhost:8080
app.Get("/", func(ctx iris.Context) {
// Bind: {{.message}} with "Hello world!"
ctx.ViewData("message", "Hello world!")
// Render template file: ./views/hello.html
ctx.View("hello.html")
})
// Method: GET
// Resource: http://localhost:8080/user/42
//
// Need to use a custom regexp instead?
// Easy;
// Just mark the parameter's type to 'string'
// which accepts anything and make use of
// its `regexp` macro function, i.e:
// app.Get("/user/{id:string regexp(^[0-9]+$)}")
app.Get("/user/{id:uint64}", func(ctx iris.Context) {
userID, _ := ctx.Params().GetUint64("id")
ctx.Writef("User ID: %d", userID)
})
// Start the server using a network address.
app.Listen(":8080")
}
<!-- file: ./views/hello.html -->
<html>
<head>
<title>Hello Page</title>
</head>
<body>
<h1>{{.message}}</h1>
</body>
</html>

Wanna re-start your app automatically when source code changes happens? Install the iris-cli tool and execute iris-cli run instead of go run main.go.

At the next section we will learn more about Routing.