The development of multi-language support in the golang framework

Multi-language support in the Go framework includes: locale package: Manages locales and regions. template package: A template system for generating multilingual content. fmt bundle: Format strings in a specific locale.

The development of multi-language support in the Go framework

When building applications for global users, multi-language support to It's important. The Go language provides a concise yet powerful mechanism to support multilingual applications.

Multi-language support in Go

The Go framework provides the following features for multi-language support:

• locale Packages: Tools for managing different locales and regions.
• template Package: Template system for generating multilingual content.
• fmt Bundle: Functions for formatting strings in a specific locale.

Practical Case: Multilingual Website

The following is a sample code for a multilingual website using the Go framework:

package main

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

    "golang.org/x/text/language"
)

// 语言地图，映射语言标签到模板文件
var languageMap = map[string]string{
    "en": "templates/en.html",
    "es": "templates/es.html",
}

// 语言支持回调
func languageDetector(lang string) (language.Tag, error) {
    // 解析 HTTP 请求中的语言首选项
    tags, _, err := language.ParseAcceptLanguage(strings.Split(lang, ",")...)
    if err != nil {
        return language.Und, err
    }

    // 查找支持的语言标签
    for _, tag := range tags {
        if _, ok := languageMap[tag.String()]; ok {
            return tag, nil
        }
    }

    // 返回未定义的语言标签（Und）
    return language.Und, nil
}

// 主处理程序，响应 HTTP 请求
func mainHandler(w http.ResponseWriter, r *http.Request) {
    // 使用解析的首选项语言标签获取模板
    langTag, err := languageDetector(r.Header.Get("Accept-Language"))
    if err != nil {
        http.Error(w, "Internal error", http.StatusInternalServerError)
        return
    }

    // 使用接受的语言渲染模板
    langTemplate, ok := languageMap[langTag.String()]
    if !ok {
        http.Error(w, "Unsupported language", http.StatusNotFound)
        return
    }
    t, err := template.ParseFiles(langTemplate)
    if err != nil {
        http.Error(w, "Template error", http.StatusInternalServerError)
        return
    }

    // 执行模板并写入响应
    if err := t.Execute(w, nil); err != nil {
        http.Error(w, "Execution error", http.StatusInternalServerError)
    }
}

func main() {
    http.HandleFunc("/", mainHandler)
    http.ListenAndServe(":8080", nil)
}

This example Shows how to dynamically detect the preferred locale of a request and render the appropriate template based on it.

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