HTML Response

Learn how to send HTML responses in Iris.

Basic HTML Response

package main

import "github.com/kataras/iris/v12"

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

    app.Get("/", func(ctx iris.Context) {
        ctx.HTML("<h1>Hello World</h1>")
    })

    app.Get("/formatted", func(ctx iris.Context) {
        name := "John"
        ctx.HTML("<h1>Hello %s</h1>", name)
    })

    app.Listen(":8080")
}

Template Engine

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

    // Register template engine
    tmpl := iris.HTML("./views", ".html")
    tmpl.Layout("layouts/main.html")
    tmpl.Reload(true) // Enable reloading for development
    app.RegisterView(tmpl)

    app.Get("/", func(ctx iris.Context) {
        ctx.ViewData("title", "Home Page")
        ctx.ViewData("message", "Welcome!")
        ctx.View("index.html")
    })

    app.Listen(":8080")
}

Partial Views

app.Get("/with-partial", func(ctx iris.Context) {
    ctx.ViewData("title", "Page with Partial")
    ctx.View("page.html")
})

// In page.html:
// {{ partial "header.html" . }}

Best Practices

1. Security:

   • Escape HTML output
   • Validate input
   • Set security headers
   • Prevent XSS
   • Handle sensitive data

2. Performance:

   • Cache templates
   • Enable compression
   • Optimize response size
   • Monitor rendering time
   • Handle timeouts

3. Development:

   • Use layouts
   • Implement partials
   • Document structure
   • Follow conventions
   • Test rendering

4. Maintenance:

   • Regular updates
   • Monitor errors
   • Clean templates
   • Document changes
   • Review security