Sessions

Create a main.go file and copy-paste the following code snippets:
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package main
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​
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import (
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    "fmt"
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    "time"
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​
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    "github.com/kataras/iris/v12"
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    "github.com/kataras/iris/v12/mvc"
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    "github.com/kataras/iris/v12/sessions"
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)
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​
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func main() {
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    app := iris.New()
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​
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    // Configure sessions manager as we used to.
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    sess := sessions.New(sessions.Config{Cookie: "mysession_cookie_name"})
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    app.Use(sess.Handler())
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​
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    visitApp := mvc.New(app)
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    visitApp.Register(time.Now())
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    visitApp.Handle(new(VisitController))
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​
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    app.Listen(":8080")
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}
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Controller
The VisitController.Session is automatically binded to the current sessions.Session.
The VisitController.StartTime is statically set to the server's start time with .Register(time.Now()) above.
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type VisitController struct {
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    Session *sessions.Session
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​
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    StartTime time.Time
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}
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​
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func (c *VisitController) Get() string {
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    // it increments a "visits" value of integer by one,
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    // if the entry with key 'visits' doesn't exist
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    // it will create it for you.
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    visits := c.Session.Increment("visits", 1)
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    // write the current, updated visits.
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    since := time.Now().Sub(c.StartTime).Seconds()
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    return fmt.Sprintf("%d visit(s) from my current session in %0.1f seconds of server's up-time",
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        visits, since)
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}
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Run
Open a terminal session and execute:
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$ go run main.go
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1.
Prepare a client, e.g. your browser
2.
navigate to http://localhost:8080​
3.
refresh the page some times
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close the browser
5.
re-open the browser (if it wasn't in private mode) and re-play 2.

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