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// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package language_test
import (
"fmt"
"net/http"
"strings"
"golang.org/x/text/language"
)
// matcher is a language.Matcher configured for all supported languages.
var matcher = language.NewMatcher([]language.Tag{
language.BritishEnglish,
language.Norwegian,
language.German,
})
// handler is an http.HandlerFunc.
func handler(w http.ResponseWriter, r *http.Request) {
t, q, err := language.ParseAcceptLanguage(r.Header.Get("Accept-Language"))
// We ignore the error: the default language will be selected for t == nil.
tag, _, _ := matcher.Match(t...)
fmt.Printf("%17v (t: %6v; q: %3v; err: %v)\n", tag, t, q, err)
}
func ExampleParseAcceptLanguage() {
for _, al := range []string{
"nn;q=0.3, en-us;q=0.8, en,",
"gsw, en;q=0.7, en-US;q=0.8",
"gsw, nl, da",
"invalid",
} {
// Create dummy request with Accept-Language set and pass it to handler.
r, _ := http.NewRequest("GET", "example.com", strings.NewReader("Hello"))
r.Header.Set("Accept-Language", al)
handler(nil, r)
}
// Output:
// en-GB (t: [ en en-US nn]; q: [ 1 0.8 0.3]; err: <nil>)
// en-GB-u-rg-uszzzz (t: [ gsw en-US en]; q: [ 1 0.8 0.7]; err: <nil>)
// de (t: [ gsw nl da]; q: [ 1 1 1]; err: <nil>)
// en-GB (t: []; q: []; err: language: tag is not well-formed)
}