Iris

A fast, cross-platform and efficient web framework with robust set of well-designed features, written entirely in Go.

Build your own web applications and portable APIs with the highest performance and countless potentials.

If you're coming from Node.js world, this is the expressjs++ equivalent for the Go Programming Language.

Installation
Feature overview
Documentation
- Examples
- Reload on source code changes
Support
- Buy me a cup of coffee?
Third-party middleware list
Testing
Philosophy
People
- Legends
- Contact
Versioning
- When should I upgrade?
- Where can I find older versions?

Installation

The only requirement is the Go Programming Language, at least version 1.8

$ go get -u github.com/kataras/iris

Iris uses the vendor directory feature, so you get truly reproducible builds, as this method guards against upstream renames and deletes. For further installation support, please navigate here.

package main

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

// User is just a bindable object structure.
type User struct {
    Username  string `json:"username"`
    Firstname string `json:"firstname"`
    Lastname  string `json:"lastname"`
    City      string `json:"city"`
    Age       int    `json:"age"`
}

func main() {
    app := iris.New()
    
    // Define templates using the std html/template engine.
    // Parse and load all files inside "./views" folder with ".html" file extension.
    // Reload the templates on each request (development mode).
    app.AttachView(view.HTML("./views", ".html").Reload(true))
    
    // Regster custom handler for specific http errors.
    app.OnErrorCode(iris.StatusInternalServerError, func(ctx context.Context) {
    	// .Values are used to communicate between handlers, middleware.
    	errMessage := ctx.Values().GetString("error")
    	if errMessage != "" {
    		ctx.Writef("Internal server error: %s", errMessage)
    		return
    	}
    
    	ctx.Writef("(Unexpected) internal server error")
    })
    
    app.Use(func(ctx context.Context) {
    	ctx.Application().Log("Begin request for path: %s", ctx.Path())
    	ctx.Next()
    })
    
    // app.Done(func(ctx context.Context) {})
    
    // Method POST: http://localhost:8080/decode
    app.Post("/decode", func(ctx context.Context) {
    	var user User
    	ctx.ReadJSON(&user)
    	ctx.Writef("%s %s is %d years old and comes from %s", user.Firstname, user.Lastname, user.Age, user.City)
    })
    
    // Method GET: http://localhost:8080/encode
    app.Get("/encode", func(ctx context.Context) {
    	doe := User{
    		Username:  "Johndoe",
    		Firstname: "John",
    		Lastname:  "Doe",
    		City:      "Neither FBI knows!!!",
    		Age:       25,
    	}
    
    	ctx.JSON(doe)
    })
    
    // Method GET: http://localhost:8080/profile/anytypeofstring
    app.Get("/profile/{username:string}", profileByUsername)
    
    usersRoutes := app.Party("/users", logThisMiddleware)
    {
    	// Method GET: http://localhost:8080/users/42
    	usersRoutes.Get("/{id:int min(1)}", getUserByID)
    	// Method POST: http://localhost:8080/users/create
    	usersRoutes.Post("/create", createUser)
    }
    
    // Listen for incoming HTTP/1.x & HTTP/2 clients on localhost port 8080.
    app.Run(iris.Addr(":8080"), iris.WithCharset("UTF-8"))
}

func logThisMiddleware(ctx context.Context) {
    ctx.Application().Log("Path: %s | IP: %s", ctx.Path(), ctx.RemoteAddr())
    
    // .Next is required to move forward to the chain of handlers,
    // if missing then it stops the execution at this handler.
    ctx.Next()
}

func profileByUsername(ctx context.Context) {
    // .Params are used to get dynamic path parameters.
    username := ctx.Params().Get("username")
    ctx.ViewData("Username", username)
    // renders "./views/users/profile.html"
    // with {{ .Username }} equals to the username dynamic path parameter.
    ctx.View("users/profile.html")
}

func getUserByID(ctx context.Context) {
    userID := ctx.Params().Get("id") // Or convert directly using: .Values().GetInt/GetInt64 etc...
    // your own db fetch here instead of user :=...
    user := User{Username: "username" + userID}
    
    ctx.XML(user)
}

func createUser(ctx context.Context) {
    var user User
    err := ctx.ReadForm(&user)
    if err != nil {
    	ctx.Values().Set("error", "creating user, read and parse form failed. "+err.Error())
    	ctx.StatusCode(iris.StatusInternalServerError)
    	return
    }
    // renders "./views/users/create_verification.html"
    // with {{ . }} equals to the User object, i.e {{ .Username }} , {{ .Firstname}} etc...
    ctx.ViewData("", user)
    ctx.View("users/create_verification.html")
}

Reload on source code changes

$ go get -u github.com/kataras/rizla
$ cd $GOPATH/src/mywebapp
$ rizla main.go

Psst: Wanna go to _examples to see more code-snippets?

Feature Overview

Focus on high performance
Build RESTful APIs with our expressionist path syntax, i.e {userid:int min(1)}, {asset:path}, {custom regexp([a-z]+)}
Automatically install and serve certificates from https://letsencrypt.org
Robust routing and middleware ecosystem
Request-Scoped Transactions
Group API's and subdomains with wildcard support
Body binding for JSON, XML, Forms, can be extended to use your own custom binders
More than 50 handy functions to send HTTP responses
View system: supporting more than 6+ template engines, with prerenders. You can still use your favorite
Define virtual hosts and (wildcard) subdomains with path level routing
Graceful shutdown
Limit request body
Localization i18N
Serve static and embedded files
Cache
Log requests
Customizable format and output for the logger
Customizable HTTP errors
Compression (Gzip)
Authentication
OAuth, OAuth2 supporting 27+ popular websites
JWT
Basic Authentication
HTTP Sessions
Add / Remove trailing slash from the URL with option to redirect
Redirect requests
HTTP to HTTPS
HTTP to HTTPS WWW
HTTP to HTTPS non WWW
Non WWW to WWW
WWW to non WWW
Highly scalable rich content render (Markdown, JSON, JSONP, XML...)
Websocket-only API similar to socket.io
Hot Reload on source code changes
Typescript integration + Web IDE
Checks for updates at startup
Highly customizable
Feels like you used iris forever, thanks to its Fluent API
And many others...

Documentation

Small but practical examples --they cover each feature.

Wanna create your own fast URL Shortener Service Using Iris? --click here to learn how.

Godocs --for deep understanding.

Support

Post a feature request or report a bug, will help to make the framework even better.
⭐ and watch the project, will notify you about updates.
🌎 publish an article or share a tweet about Iris.
Donations, will help me to continue.

I'll be glad to talk with you about your awesome feature requests, open a new discussion, you will be heard!

Thanks in advance!

Buy me a cup of coffee?

Iris is free and open source but developing it has taken thousands of hours of my time and a large part of my sanity. If you feel this web framework useful to you, it would go a great way to ensuring that I can afford to take the time to continue to develop it.

I spend all my time in the construction of Iris, therefore I have no income value.

Feel free to send any amount through paypal:

Please check your e-mail after your donation.

Thanks for your gratitude and finance help ♡

Third Party Middleware

Iris has its own middleware form of func(ctx context.Context) but it's also compatible with all net/http middleware forms. See here.

I'm sure that each of you have, already, found his own favorite list but here's a small list of third-party handlers:

Middleware	Author	Description
tollbooth	Didip Kerabat	Generic middleware to rate-limit HTTP requests. Example
goth	Mark Bates	OAuth, OAuth2 authentication. Example
binding	Matt Holt	Data binding from HTTP requests into structs
cloudwatch	Colin Steele	AWS cloudwatch metrics middleware
csp	Awake Networks	Content Security Policy (CSP) support
delay	Jeff Martinez	Add delays/latency to endpoints. Useful when testing effects of high latency
New Relic Go Agent	Yadvendar Champawat	Official New Relic Go Agent (currently in beta)
gorelic	Jingwen Owen Ou	New Relic agent for Go runtime
JWT	Auth0	Middleware checks for a JWT on the `Authorization` header on incoming requests and decodes it. Example
logrus	Dan Buch	Logrus-based logger
onthefly	Alexander Rødseth	Generate TinySVG, HTML and CSS on the fly
permissions2	Alexander Rødseth	Cookies, users and permissions
prometheus	Rene Zbinden	Easily create metrics endpoint for the prometheus instrumentation tool
render	Cory Jacobsen	Render JSON, XML and HTML templates
RestGate	Prasanga Siripala	Secure authentication for REST API endpoints
secure	Cory Jacobsen	Middleware that implements a few quick security wins
stats	Florent Messa	Store information about your web application (response time, etc.)
VanGoH	Taylor Wrobel	Configurable AWS-Style HMAC authentication middleware
xrequestid	Andrea Franz	Middleware that assigns a random X-Request-Id header to each request
digits	Bilal Amarni	Middleware that handles Twitter Digits authentication

Feel free to put up a PR your middleware!

Testing

The httptest package is your way for end-to-end HTTP testing, it uses the httpexpect library created by our friend, gavv.

A simple test is located to ./_examples/intermediate/httptest/main_test.go

Philosophy

The Iris philosophy is to provide robust tooling for HTTP, making it a great solution for single page applications, web sites, hybrids, or public HTTP APIs. Keep note that, today, iris is faster than apache+nginx itself.

Iris does not force you to use any specific ORM or template engine. With support for the most popular template engines, you can quickly craft your perfect application.

People

The author of Iris is @kataras.

However the real Success of Iris belongs to you with your bug reports and feature requests that made this Framework so Unique.

Legends

I really need to thank each one of them because they stood up♡ to keep this project alive and active.

Juan Sebastián Suárez Valencia donated 20 EUR at September 11 of 2016

Bob Lee donated 20 EUR at September 16 of 2016

Celso Luiz donated 50 EUR at September 29 of 2016

Ankur Srivastava donated 20 EUR at October 2 of 2016

Damon Zhao donated 20 EUR at October 21 of 2016

exponity - consulting & digital transformation donated 30 EUR at November 4 of 2016

Thomas Fritz donated 25 EUR at Jenuary 8 of 2017

Thanos V. donated 20 EUR at Jenuary 16 of 2017

George Opritescu donated 20 EUR at February 7 of 2017

Lex Tang donated 20 EUR at February 22 of 2017

Conrad Steenberg donated 25 EUR at March 23 of 2017

Contact

Besides the fact that we have a community chat for questions or reports and ideas, stackoverflow section for generic go+iris questions and the iris support for bug reports and feature requests, you can also contact with me, as a person who is always open to help you:

Version

Current: 7.1.1

Each new release is pushed to the master. It stays there until the next version. When a next version is released then the previous version goes to its own branch with gopkg.in as its import path (and its own vendor folder), in order to keep it working "for-ever".

Community members can request additional features or report a bug fix for a specific iris version.

Should I upgrade my Iris?

Developers are not forced to use the latest Iris version, they can use any version in production, they can update at any time they want.

Testers should upgrade immediately, if you're willing to use Iris in production you can wait a little more longer, transaction should be as safe as possible.

Where can I find older versions?

Each Iris version is independent. Only bug fixes, Router's API and experience are kept.

Previous versions can be found at releases page.

License

Unless otherwise noted, the source files are distributed under the BSD-3-Clause License found in the LICENSE file.

Note that some third-party packages that you use with Iris may requires different license agreements.

DangelZM/iris