Wikiversity

Server-Side Scripting/Routes and Templates/Go

< Server-Side Scripting | Routes and Templates

app.go

edit 
// Demonstrates a complete server-side website using:
//   * static HTML and CSS
//   * a template
//   * a code module
//
// NOTE: Static pages (html, css, images, etc.) are placed in
// a folder named "static". Template pages are placed in a folder
// named "templates". Code modules are placed in a folder named
// "routes".
//
// Folder structure:
// app.go
// go.mod
// routes
//   lesson1.go
//   lesson2.go
// static
//   index.html
//   hello.html
//   styles.css
// templates
//   lesson2.html
//
// References:
//  https://gowebexamples.com/hello-world/
//  https://www.honeybadger.io/blog/go-web-services/
//  https://linguinecode.com/post/how-to-import-local-files-packages-in-golang
//  https://www.alexedwards.net/blog/serving-static-sites-with-go

package main

import (
    "log"
    "net/http"
    "local/routes"
)

func main() {
    mux := http.NewServeMux()
    mux.HandleFunc("/lesson1", routes.Lesson1)
    mux.HandleFunc("/lesson2", routes.Lesson2)

    mux.Handle("/",
        http.FileServer(http.Dir("./static")))
    
    log.Fatal(http.ListenAndServe(":8000", mux))
}

go.mod

edit 
module local

go 1.17

routes/lesson1.go

edit 
// Displays "Hello code world!"
//
// References:
//  https://repl.it/@mauriycf/A-simple-web-server-in-go#main.go
//  https://gowebexamples.com/hello-world/

package routes

import (
    "net/http"
    "io"
)

func Lesson1(response http.ResponseWriter, request *http.Request) {
    io.WriteString(response, "Hello code world!")
}

routes/lesson2.go

edit 
// Displays a rendered template.
//
// References:
//	https://blog.gopheracademy.com/advent-2017/using-go-templates/
//  https://gowebexamples.com/templates/

package routes

import (
    "net/http"
    "html/template"
    "path/filepath"
)

func Lesson2(response http.ResponseWriter, request *http.Request) {
    type Data struct {
	    Greeting    string
	    Name 		string
    }

	data := Data{"Hello", "world"}

	path := filepath.Join("templates", "lesson2.html")

	parsed, _ := template.ParseFiles(path)
	parsed.Execute(response, data)
}

static/hello.html

edit 
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>Hello World</title>
    <link rel="stylesheet" href="styles.css">    
  </head>
  <body>
    <p>Hello static world!</p>
  </body>
</html>

static/index.html

edit 
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>Routes and Templates</title>
    <link rel="stylesheet" href="styles.css">
  </head>
  <body>
      <h1>Hello World</h1>
      <ul>
          <li><a href="hello.html">Static</a></li>
          <li><a href="lesson1">Code</a></li>
          <li><a href="lesson2">Template</a></li>
      </ul>
  </body>
</html>

static/styles.css

edit 
body {
    color: blue;
    font-family: Arial, Helvetica, sans-serif;
    font-size: larger;
}

templates/lesson2.html

edit 
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>Lesson 2</title>
    <link rel="stylesheet" href="styles.css">
  </head>
  <body>
    <p>{{.Greeting}} template {{.Name}}!</p>
  </body>
</html>

Try It

edit

Copy and paste the code above into the following free online development environment or use your own Go compiler / interpreter / IDE.

See Also

edit
Retrieved from "https://en.wikiversity.org/w/index.php?title=Server-Side_Scripting/Routes_and_Templates/Go&oldid=2369901"