Trying to build simple web app that works with multiple languages, but I noticed the output is printed twice in my statement:
func index(w http.ResponseWriter, r *http.Request) {
fmt.Println(lang.Value)
fmt.Println(cfg.Database.Username)
}
The output I get is:
D:\Development\GO\i18n>go run hasan/web
Listening to port: 8090
en
admin
en
admin
And my full code is:
// main.go
package main
import (
"fmt"
"net/http"
"os"
"text/template"
"gopkg.in/yaml.v2"
)
// Config ...
type Config struct {
Server struct {
Port string `yaml:"port"`
Host string `yaml:"host"`
} `yaml:"server"`
Database struct {
Username string `yaml:"user"`
Password string `yaml:"pass"`
} `yaml:"database"`
}
func processError(err error) {
fmt.Println(err)
os.Exit(2)
}
func readFile(cfg *Config, lang string) {
f, err := os.Open(fmt.Sprint("configuration/", lang, ".yml"))
if err != nil {
processError(err)
}
defer f.Close()
decoder := yaml.NewDecoder(f)
err = decoder.Decode(cfg)
if err != nil {
processError(err)
}
}
func index(w http.ResponseWriter, r *http.Request) {
var tmpl *template.Template
var cfg Config
lang, err := r.Cookie("language")
if err != nil {
readFile(&cfg, "en")
tmpl, _ = template.New("").ParseFiles(fmt.Sprint("templates/en/page-en.html"), "base.html")
} else {
readFile(&cfg, lang.Value)
fmt.Println(lang.Value)
fmt.Println(cfg.Database.Username)
tmpl, _ = template.New("").ParseFiles(fmt.Sprint("templates/", lang.Value, "/page-", lang.Value, ".html"), "base.html")
}
tmpl.ExecuteTemplate(w, "base", nil)
}
func main() {
port := "8090"
http.Handle("/static/", http.StripPrefix("/static/", http.FileServer(http.Dir("./public"))))
http.HandleFunc("/", index)
fmt.Println("Listening to port:", port)
error := http.ListenAndServe(":"+port, nil)
fmt.Println(error)
}
And templates are:
// base.html
{{define "base"}}
<!DOCTYPE html>
<html lang="en">
<link rel="shortcut icon" href="favicon.ico" />
<script>
function setLanguage(lang) {
document.cookie = "language="+lang;
location.reload();
}
</script>
<body>
<a href="#" onclick="setLanguage('en')">English</a>
<a href="#" onclick="setLanguage('ar')">عربي</a>
<br/>
{{template "content" .}}
<br/>
footer...
</body>
</html>
{{end}}
// templates/page-en.html
{{define "content"}}
Welcome
{{end}}
// templates/page-ar.html
{{define "content"}}
أهلا و سهلا
{{end}}
The configuration files are:
// configuration/en.yml
# Server configurations
server:
host: "localhost"
port: 8000
# Database credentials
database:
user: "admin"
pass: "password"
// configuration/ar.yml
# تعريف الخادم
server:
host: "localhost"
port: 8000
# كلمة الس لقاعدة البيانات
database:
user: "مدير"
pass: "كلمة سر"
The go.mod file is:
module hasan/web
go 1.16
require gopkg.in/yaml.v2 v2.4.0