Language package for Golang

Package language provides HTTP middleware for parsing language from HTTP request and passing it via context.

How to install

Run the following command to install the package:

go get -u github.com/muonsoft/language

Example of reading language from Accept-Language header

package main

import (
    "fmt"
    "net/http"
    "net/http/httptest"
    
    "github.com/muonsoft/language"
)

func main() {
    h := http.HandlerFunc(func (writer http.ResponseWriter, request *http.Request) {
        tag := language.FromContext(request.Context())
        fmt.Println("language:", tag)
    })
    m := language.NewMiddleware(h, language.SupportedLanguages(language.English, language.Russian))
    
    r := httptest.NewRequest(http.MethodGet, "/", nil)
    r.Header.Set("Accept-Language", "ru")
    w := httptest.NewRecorder()
    
    m.ServeHTTP(w, r)
    // Output: language: ru
}

Example of reading language from Cookie

package main

import (
    "fmt"
    "net/http"
    "net/http/httptest"
    
    "github.com/muonsoft/language"
)

func main() {
    h := http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
        tag := language.FromContext(request.Context())
        fmt.Println("language:", tag)
    })
    m := language.NewMiddleware(
        h,
        language.SupportedLanguages(language.English, language.Russian),
        language.ReadFromCookie("lang"),
    )
    
    r := httptest.NewRequest(http.MethodGet, "/", nil)
    r.AddCookie(&http.Cookie{Name: "lang", Value: "ru"})
    w := httptest.NewRecorder()
    
    m.ServeHTTP(w, r)
    // Output: language: ru
}