Golang learning web application internationalization implementation

With the trend of globalization, internationalization has become more and more important, and Web applications are no exception. When developing web applications, we need to design the application to support different languages ​​and cultures. This is internationalization. Specifically, when applications use the same code base in different regions and cultures, they can automatically convert text and language to better adapt to different user needs.

Golang, as a very popular programming language, can also be used to implement the internationalization of web applications. In this article, I will introduce how to use Golang to implement internationalization functions of web applications.

Step 1: Install the necessary Golang packages

To achieve internationalization of web applications, we need to install some necessary Golang packages. The most important package is the "i18n" package, which is the core of internationalization. You can use the following command to install this package:

go get github.com/astaxie/beego/i18n

Step 2: Configure i18n package

Next, we need to configure the i18n package in the application. In this application, we need to configure the i18n package so that it can correctly convert text and language into different languages. You can use the following code to configure the i18n package:

import (
    "github.com/astaxie/beego"
    "github.com/astaxie/beego/i18n"
)
var LangTypes []string //支持的语言列表const (
    LANG_ENGLISH = "en-US"
    LANG_CHINA   = "zh-CN"
)
func SetUpI18n() {
    langs := beego.AppConfig.String("langs")
    LangTypes = strings.Split(langs, "|")
    for _, lang := range LangTypes {
        if lang == "en-US" {
            err := i18n.SetMessage(lang, "conf/locale_en-US.ini")
            if err != nil {
                beego.Error(err)
                continue
            }
            continue
        }
        if lang == "zh-CN" {
            err := i18n.SetMessage(lang, "conf/locale_zh-CN.ini")
            if err != nil {
                beego.Error(err)
                continue
            }
            continue
        }
    }
}

In this code, we first get the list of languages ​​supported in the system through beego.AppConfig. Then, we iterate through all languages ​​and load the corresponding language files for each language. In this example, we only provide "en-US" and "zh-CN" languages.

Step 3: Write template

After we have the i18n package and language files, we can start writing Web applications. In this application we need to write templates so that we can easily switch between different languages. The following is a sample template:

{{.i18n "welcome"}}, {{.i18n "userName"}}!

In the above template code, {{.i18n "welcome"}} and {{.i18n "userName"}} are the texts we want to translate. The following is the implementation of the translation function provided in the i18n package:

func (c *LangController) Lang() {
    lang := c.Ctx.Input.Param(":lang")
    if lang == "" {
        lang = "en-US"
    }
    c.SetLang(lang)
    c.Redirect("/", 302)
}
func (c *LangController) SetLang(lang string) {
    beego.Trace(lang)
    if lang != "" {
        c.Ctx.SetCookie("lang", lang, 1<<31-1, "/")
    } else {
        c.Ctx.SetCookie("lang", "", -1, "/")
    }
    c.Data["Lang"] = lang
}
func (c *BaseController) Prepare() {
    lang := c.Ctx.GetCookie("lang")

    if lang == "" {
        lang = LANG_ENGLISH
        c.SetLang(lang)
    }

    c.Data["Lang"] = lang
    trans := i18n.GetLangByType(lang)
    c.Data["i18n"] = trans
}

In the above code, we define a LangController for switching languages, a SetLang function for setting the language, and a BaseController for setting the locale. . Through these functions, we can easily switch and set the locale.

Step 4: Run the web application

Finally, we need to run the web application so that it can correctly support different languages. We can use the following command to run the web application:

bee run

This command will start the web application, which will listen for HTTP requests on port 8080 by default. We can test whether the application has translated the text correctly by visiting http://localhost:8080/en-US/welcome or http://localhost:8080/zh-CN/welcome in the browser.

Conclusion

In this article, we introduced how to use Golang to implement the internationalization function of web applications. Through i18n packages and language files, we can easily implement internationalization to better adapt to different user needs. If you are developing a web application, then we highly recommend you to use Golang to implement internationalization features to improve the user experience of your application.

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