Tuesday 27 October 2020

go web app 11 template advanced

 

struct
//tutorial.go
package main

import (
"html/template"
"net/http"

"github.com/gorilla/mux"
)

type car struct {
Color   string
Mileage int
Model   string
}

var templates *template.Template

var truck = car{
Color:   "black",
Mileage: 12345,
Model:   "F-150",
}

func indexGetHandler(w http.ResponseWriter, r *http.Request) {
templates.ExecuteTemplate(w, "index.html", truck)
}

func main() {
templates = template.Must(template.ParseGlob("templates/*.html"))
r := mux.NewRouter()
r.HandleFunc("/", indexGetHandler).Methods("GET")
http.Handle("/", r)
http.ListenAndServe(":8000", nil)
}

----------------------------
//index.html
<html>

<head>
    <title> Templates</title>
</head>

<body>
    <h1>Ford {{.Model}}</h1>
    <p>Mileage: {{.Mileage}}</p>
    <p>Color: {{.Color}}</p>
</body>

</html>
array
//tutorial.go
package main

import (
"html/template"
"net/http"

"github.com/gorilla/mux"
)

var templates *template.Template

var colors = []string{"red", "green", "blue"}

func indexGetHandler(w http.ResponseWriter, r *http.Request) {
templates.ExecuteTemplate(w, "index.html", colors)
}

func main() {
templates = template.Must(template.ParseGlob("templates/*.html"))
r := mux.NewRouter()
r.HandleFunc("/", indexGetHandler).Methods("GET")
http.Handle("/", r)
http.ListenAndServe(":8000", nil)
}

-------------------------
//index.html
<html>

<head>
    <title> Templates</title>
</head>

<body>
    <h1>Colors</h1>

    <ul>
        {{range $index, $item := .}}
        <li>{{$index}} - {{$item}}</li>
        {{end}}
    </ul>
</body>

</html>

map
//tutorial.go
package main

import (
"html/template"
"net/http"

"github.com/gorilla/mux"
)

var templates *template.Template

var grades = map[string]int{
"homework": 100,
"quize": 100,
"midterm": 100,
"final": 100,
}

func indexGetHandler(w http.ResponseWriter, r *http.Request) {
templates.ExecuteTemplate(w, "index.html", grades)
}

func main() {
templates = template.Must(template.ParseGlob("templates/*.html"))
r := mux.NewRouter()
r.HandleFunc("/", indexGetHandler).Methods("GET")
http.Handle("/", r)
http.ListenAndServe(":8000", nil)
}

-------------------------
//index.html
<html>

<head>
    <title> Templates</title>
</head>

<body>
    <h1>Grades</h1>

    <ul>
        {{range $key, $val := .}}
        <li>{{$key}} - {{$val}}</li>
        {{end}}
    </ul>
</body>

</html>
struct array
//tutorial.go
package main

import (
"html/template"
"net/http"

"github.com/gorilla/mux"
)

type car struct {
Color   string
Mileage int
Model   string
}

var templates *template.Template

var truck = car{
Color:   "black",
Mileage: 12345,
Model:   "F-150",
}

var sedan = car{
Color:   "white",
Mileage: 321,
Model:   "Corolla",
}

func indexGetHandler(w http.ResponseWriter, r *http.Request) {
templates.ExecuteTemplate(w, "index.html", []car{truck, sedan})
}

func main() {
templates = template.Must(template.ParseGlob("templates/*.html"))
r := mux.NewRouter()
r.HandleFunc("/", indexGetHandler).Methods("GET")
http.Handle("/", r)
http.ListenAndServe(":8000", nil)
}

----------------------------
//index.html
<html>

<head>
    <title> Templates</title>
</head>

<body>
    <h1>Cars</h1>

    <ul>
        {{range .}}
        <li>{{.Color}} {{.Model}} - {{.Mileage}} Miles</li>
        {{end}}
    </ul>
</body>

</html>

reference:

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