iris/_examples

Examples

Please do learn how net/http std package works, first.

This folder provides easy to understand code snippets on how to get started with iris micro web framework.

It doesn't always contain the "best ways" but it does cover each important feature that will make you so excited to GO with iris!

Overview

• Hello world!
• Glimpse
• Tutorial: Online Visitors
• Tutorial: URL Shortener using BoltDB
• Tutorial: How to turn your Android Device into a fully featured Web Server (MUST)

HTTP Listening

• Common, with address
  • omit server errors
• UNIX socket file
• TLS
• Letsencrypt (Automatic Certifications)
• Notify on shutdown
• Custom TCP Listener
  • common net.Listener
  • SO_REUSEPORT for unix systems
• Custom HTTP Server
  • easy way
  • std way
  • multi server instances
• Graceful Shutdown
  • using the RegisterOnInterrupt
  • using a custom notifier

Configuration

• Functional
• From Configuration Struct
• Import from YAML file
• Import from TOML file

Routing, Grouping, Dynamic Path Parameters, "Macros" and Custom Context

• app.Get("{userid:int min(1)}", myHandler)
• app.Post("{asset:path}", myHandler)
• app.Put("{custom:string regexp([a-z]+)}", myHandler)

Note: unlike other routers you'd seen, iris' router can handle things like these:

// Matches all GET requests prefixed with "/assets/"
app.Get("/assets/{asset:path}", assetsWildcardHandler)

// Matches only GET "/"
app.Get("/", indexHandler)
// Matches only GET "/about"
app.Get("/about", aboutHandler)

// Matches all GET requests prefixed with "/profile/"
// and followed by a single path part
app.Get("/profile/{username:string}", userHandler)
// Matches only GET "/profile/me" because 
// it does not conflict with /profile/{username:string}
// or the root wildcard {root:path}
app.Get("/profile/me", userHandler)

// Matches all GET requests prefixed with /users/
// and followed by a number which should be equal or bigger than 1
app.Get("/user/{userid:int min(1)}", getUserHandler)
// Matches all requests DELETE prefixed with /users/
// and following by a number which should be equal or bigger than 1
app.Delete("/user/{userid:int min(1)}", deleteUserHandler)

// Matches all GET requests except "/", "/about", anything starts with "/assets/" etc...
// because it does not conflict with the rest of the routes.
app.Get("{root:path}", rootWildcardHandler)

Navigate through examples for a better understanding.

• Overview
• Basic
• Controllers
• Custom HTTP Errors
• Dynamic Path
  • root level wildcard path
• Reverse routing
• Custom wrapper
• Custom Context
  • method overriding
  • new implementation
• Route State

MVC

Iris has first-class support for the MVC (Model View Controller) pattern, you'll not find these stuff anywhere else in the Go world.

Iris web framework supports Request data, Models, Persistence Data and Binding with the fastest possible execution.

Characteristics

All HTTP Methods are supported, for example if want to serve GET then the controller should have a function named Get(), you can define more than one method function to serve in the same Controller struct.

Persistence data inside your Controller struct (share data between requests) via iris:"persistence" tag right to the field or Bind using app.Controller("/" , new(myController), theBindValue).

Models inside your Controller struct (set-ed at the Method function and rendered by the View) via iris:"model" tag right to the field, i.e User UserModel `iris:"model" name:"user"` view will recognise it as {{.user}}. If name tag is missing then it takes the field's name, in this case the "User".

Access to the request path and its parameters via the Path and Params fields.

Access to the template file that should be rendered via the Tmpl field.

Access to the template data that should be rendered inside the template file via Data field.

Access to the template layout via the Layout field.

Access to the low-level context.Context via the Ctx field.

Flow as you used to, Controllers can be registered to any Party, including Subdomains, the Party's begin and done handlers work as expected.

Optional BeginRequest(ctx) function to perform any initialization before the method execution, useful to call middlewares or when many methods use the same collection of data.

Optional EndRequest(ctx) function to perform any finalization after any method executed.

Inheritance, see for example our mvc.SessionController, it has the mvc.Controller as an embedded field and it adds its logic to its BeginRequest, here.

Using Iris MVC for code reuse

By creating components that are independent of one another, developers are able to reuse components quickly and easily in other applications. The same (or similar) view for one application can be refactored for another application with different data because the view is simply handling how the data is being displayed to the user.

If you're new to back-end web development read about the MVC architectural pattern first, a good start is that wikipedia article.

Follow the examples below,

• Hello world
• Session Controller
• A simple but featured Controller with model and views.

Subdomains

• Single
• Multi
• Wildcard
• WWW

Convert http.Handler/HandlerFunc

• From func(w http.ResponseWriter, r *http.Request, next http.HandlerFunc)
• From http.Handler or http.HandlerFunc

View

Engine	Declaration
template/html	iris.HTML(...)
django	iris.Django(...)
handlebars	iris.Handlebars(...)
amber	iris.Amber(...)
pug(jade)	iris.Pug(...)

• Overview
• Hi
• A simple Layout
• Layouts: yield and render tmpl funcs
• The urlpath tmpl func
• The url tmpl func
• Inject Data Between Handlers
• Embedding Templates Into App Executable File

You can serve quicktemplate files too, simply by using the context#ResponseWriter, take a look at the http_responsewriter/quicktemplate example.

Authentication

• Basic Authentication
• OAUth2
• JWT
• Sessions

File Server

• Favicon
• Basic
• Embedding Files Into App Executable File
• Send/Force-Download Files
• Single Page Applications
  • single Page Application
  • embedded Single Page Application

How to Read from context.Request() *http.Request

• Bind JSON
• Bind Form
• Upload/Read Files

The context.Request() returns the same *http.Request you already know, these examples show some places where the Context uses this object. Besides that you can use it as you did before iris.

How to Write to context.ResponseWriter() http.ResponseWriter

• Write valyala/quicktemplate templates
• Text, Markdown, HTML, JSON, JSONP, XML, Binary
• Stream Writer
• Transactions

The context.ResponseWriter() returns an enchament version of a http.ResponseWriter, these examples show some places where the Context uses this object. Besides that you can use it as you did before iris.

ORM

• Using xorm(Mysql, MyMysql, Postgres, Tidb, SQLite, MsSql, MsSql, Oracle)

Miscellaneous

• Request Logger
  • log requests to a file
• Localization and Internationalization
• Recovery
• Profiling (pprof)
• Internal Application File Logger
• Google reCAPTCHA

More

https://github.com/kataras/iris/tree/master/middleware#third-party-handlers

Testing

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

Example

Caching

iris cache library lives on its own package.

• Simple

You're free to use your own favourite caching package if you'd like so.

Sessions

iris session manager lives on its own package.

• Overview
• Standalone
• Secure Cookie
• Flash Messages
• Databases
  • File
  • BoltDB
  • LevelDB
  • Redis

You're free to use your own favourite sessions package if you'd like so.

Websockets

iris websocket library lives on its own package.

The package is designed to work with raw websockets although its API is similar to the famous socket.io. I have read an article recently and I felt very contented about my decision to design a fast websocket-only package for Iris and not a backwards socket.io-like package. You can read that article by following this link: https://medium.com/@ivanderbyl/why-you-don-t-need-socket-io-6848f1c871cd.

• Chat
• Native Messages
• Connection List
• TLS Enabled
• Custom Raw Go Client
• Third-Party socket.io

You're free to use your own favourite websockets package if you'd like so.

Typescript Automation Tools

typescript automation tools have their own repository: https://github.com/kataras/iris/tree/master/typescript it contains examples

I'd like to tell you that you can use your favourite but I don't think you will find such a thing anywhere else.

Hey, You!

Developers should read the godocs for a better understanding.

Psst, I almost forgot; do not forget to star or watch the project in order to stay updated with the latest tech trends, it never takes more than a second!