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This is the under-development branch. Stay tuned for the upcoming release v12.2.0. Looking for a stable release? Head over to the v12.1.8 branch instead.

The official Iris Command Line Interface will soon be near you in 2020!

Support your favorite web framework through Github Sponsors Program!

Iris Web Framework

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Iris is a fast, simple yet fully featured and very efficient web framework for Go.

It provides a beautifully expressive and easy to use foundation for your next website or API.

Learn what others saying about Iris and star this open-source project to support its potentials.

Benchmarks: Jul 18, 2020 at 10:46am (UTC)

📖 Learning Iris

$ go get
# assume the following code in main.go file
$ cat main.go
package main

import ""

func main() {
	app := iris.New()

	booksAPI := app.Party("/books")

		// GET: http://localhost:8080/books
		booksAPI.Get("/", list)
		// POST: http://localhost:8080/books
		booksAPI.Post("/", create)


// Book example.
type Book struct {
	Title string `json:"title"`

func list(ctx iris.Context) {
	books := []Book{
		{"Mastering Concurrency in Go"},
		{"Go Design Patterns"},
		{"Black Hat Go"},

	// TIP: negotiate the response between server's prioritizes
	// and client's requirements, instead of ctx.JSON:
	// ctx.Negotiation().JSON().MsgPack().Protobuf()
	// ctx.Negotiate(books)

func create(ctx iris.Context) {
	var b Book
	err := ctx.ReadJSON(&b)
	// TIP: use ctx.ReadBody(&b) to bind
	// any type of incoming data instead.
	if err != nil {
		ctx.StopWithProblem(iris.StatusBadRequest, iris.NewProblem().
			Title("Book creation failure").DetailErr(err))
		// TIP: use ctx.StopWithError(code, err) when only
		// plain text responses are expected on errors.

	println("Received Book: " + b.Title)


MVC equivalent:

import ""
m := mvc.New(booksAPI)
type BookController struct {
	/* dependencies */

// GET: http://localhost:8080/books
func (c *BookController) Get() []Book {
	return []Book{
		{"Mastering Concurrency in Go"},
		{"Go Design Patterns"},
		{"Black Hat Go"},

// POST: http://localhost:8080/books
func (c *BookController) Post(b Book) int {
	println("Received Book: " + b.Title)

	return iris.StatusCreated

Run your Iris web server:

$ go run main.go
> Now listening on: http://localhost:8080
> Application started. Press CTRL+C to shut down.

List Books:

$ curl --header 'Accept-Encoding:gzip' http://localhost:8080/books

    "title": "Mastering Concurrency in Go"
    "title": "Go Design Patterns"
    "title": "Black Hat Go"

Create a new Book:

$ curl -i -X POST \
--header 'Content-Encoding:gzip' \
--header 'Content-Type:application/json' \
--data "{\"title\":\"Writing An Interpreter In Go\"}" \

> HTTP/1.1 201 Created

That's how an error response looks like:

$ curl -X POST --data "{\"title\" \"not valid one\"}" \

> HTTP/1.1 400 Bad Request

  "status": 400,
  "title": "Book creation failure"
  "detail": "invalid character '\"' after object key",

run in the browser

Iris contains extensive and thorough wiki making it easy to get started with the framework.

For a more detailed technical documentation you can head over to our godocs. And for executable code you can always visit the ./_examples repository's subdirectory.

Do you like to read while traveling?

Book cover

follow Iris web framework on twitter

You can request a PDF version and online access of the E-Book today and be participated in the development of Iris.

🙌 Contributing

We'd love to see your contribution to the Iris Web Framework! For more information about contributing to the Iris project please check the file.

List of all Contributors

🛡 Security Vulnerabilities

If you discover a security vulnerability within Iris, please send an e-mail to All security vulnerabilities will be promptly addressed.

📝 License

This project is licensed under the BSD 3-clause license, just like the Go project itself.

The project name "Iris" was inspired by the Greek mythology.

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