📌Getting started
🔌Routing
🗜️Compression
🖼️ View/Templates
📁File Server
🌎Localization
🛡️Security
🚀Responses
📥
Requests
💉Dependency Injection
Documentation
Localization features provide a convenient way to retrieve strings in various languages, allowing you to easily support multiple languages within your application. Language strings are stored in files within the
./locales directory. Within this directory there should be a subdirectory for each language supported by the application:1
│ main.go
2
└───locales
3
├───el-GR
4
│ home.yml
5
├───en-US
6
│ home.yml
7
└───zh-CN
8
home.yml
Copied!
The default language for your application is the first registered language.
1
app := iris.New()
2
3
// First parameter: Glob filpath patern,
4
// Second variadic parameter: Optional language tags,
5
// the first one is the default/fallback one.
6
app.I18n.Load("./locales/*/*", "en-US", "el-GR", "zh-CN")
Copied!
Or if you load all languages by:
1
app.I18n.Load("./locales/*/*")
2
// Then set the default language using:
3
app.I18n.SetDefault("en-US")
Copied!
Load embedded locales
You may want to embed locales with a go-bindata tool within your application executable.
- 1.install a go-bindata tool, e.g.
$ go get -u github.com/go-bindata/go-bindata/... - 2.embed local files to your application
$ go-bindata -o locales.go ./locales/... - 3.use the
LoadAssetsmethod to initialize and load the languages^ TheAssetNamesandAssetfunctions are generated bygo-bindata
1
ap.I18n.LoadAssets(AssetNames, Asset, "en-US", "el-GR", "zh-CN")
Copied!
Defining Translations
Locale files can be written at YAML(recommended), JSON, TOML or INI form.
Each file should contain keys. Keys can have sub-keys(we call them "sections") too.
Each key's value should be of form
string or map containing by its translated text (or template) or/and its pluralized key-values.Iris i18n module supports pluralization out-of-the-box, see below.
Fmt Style
1
hi: "Hi %s!"
Copied!
1
ctx.Tr("Hi", "John")
2
// Outputs: Hi John!
Copied!
Template
1
hi: "Hi {{.Name}}!"
Copied!
1
ctx.Tr("Hi", iris.Map{"Name": "John"})
2
// Outputs: Hi John!
Copied!
Pluralization
Iris i18n supports plural variables. To define a per-locale variable you must define a new section of
Vars key.The acceptable keys for variables are:
one"=x"where x is a number"<x"otherformat
Example:
1
Vars:
2
- Minutes:
3
one: "minute"
4
other: "minutes"
5
- Houses:
6
one: "house"
7
other: "houses"
Copied!
Then, each message can use this variable, here's how:
1
# Using variables in raw string
2
YouLate: "You are %[1]d ${Minutes} late."
3
# [x] is the argument position,
4
# variables always have priority other fmt-style arguments,
5
# that's why we see [1] for houses and [2] for the string argument.
6
HouseCount: "%[2]s has %[1]d ${Houses}."
Copied!
1
ctx.Tr("YouLate", 1)
2
// Outputs: You are 1 minute late.
3
ctx.Tr("YouLate", 10)
4
// Outputs: You are 10 minutes late.
5
6
ctx.Tr("HouseCount", 2, "John")
7
// Outputs: John has 2 houses.
Copied!
You can select what message will be shown based on a given plural count.
Except variables, each message can also have its plural form too!
Acceptable keys:
zeroonetwo"=x""<x"">x"other
Let's create a simple plural-featured message, it can use the Minutes variable we created above too.
1
FreeDay:
2
"=3": "You have three days and %[2]d ${Minutes} off." # "FreeDay" 3, 15
3
one: "You have a day off." # "FreeDay", 1
4
other: "You have %[1]d free days." # "FreeDay", 5
Copied!
1
ctx.Tr("FreeDay", 3, 15)
2
// Outputs: You have three days and 15 minutes off.
3
ctx.Tr("FreeDay", 1)
4
// Outputs: You have a day off.
5
ctx.Tr("FreeDay", 5)
6
// Outputs: You have 5 free days.
Copied!
Let's continue with a bit more advanced example, using template text + functions + plural + variables.
1
Vars:
2
- Houses:
3
one: "house"
4
other: "houses"
5
- Gender:
6
"=1": "She"
7
"=2": "He"
8
9
VarTemplatePlural:
10
one: "${Gender} is awesome!"
11
other: "other (${Gender}) has %[3]d ${Houses}."
12
"=5": "{{call .InlineJoin .Names}} are awesome."
Copied!
1
const (
2
female = iota + 1
3
male
4
)
5
6
ctx.Tr("VarTemplatePlural", iris.Map{
7
"PluralCount": 5,
8
"Names": []string{"John", "Peter"},
9
"InlineJoin": func(arr []string) string {
10
return strings.Join(arr, ", ")
11
},
12
})
13
// Outputs: John, Peter are awesome
14
15
ctx.Tr("VarTemplatePlural", 1, female)
16
// Outputs: She is awesome!
17
18
ctx.Tr("VarTemplatePlural", 2, female, 5)
19
// Outputs: other (She) has 5 houses.
Copied!
Sections
If the key is not a reserved one (e.g. one, two...) then it acts as a sub section. The sections are separated by dot characters (
.).1
Welcome:
2
Message: "Welcome {{.Name}}"
Copied!
1
ctx.Tr("Welcome.Message", iris.Map{"Name": "John"})
2
// Outputs: Welcome John
Copied!
Determining The Current Locale
You may use the
context.GetLocale method to determine the current locale or check if the locale is a given value:1
func(ctx iris.Context) {
2
locale := ctx.GetLocale()
3
// [...]
4
}
Copied!
The Locale interface looks like this.
1
// Locale is the interface which returns from a `Localizer.GetLocale` metod.
2
// It serves the transltions based on "key" or format. See `GetMessage`.
3
type Locale interface {
4
// Index returns the current locale index from the languages list.
5
Index() int
6
// Tag returns the full language Tag attached tothis Locale,
7
// it should be uniue across different Locales.
8
Tag() *language.Tag
9
// Language should return the exact languagecode of this `Locale`
10
//that the user provided on `New` function.
11
//
12
// Same as `Tag().String()` but it's static.
13
Language() string
14
// GetMessage should return translated text based n the given "key".
15
GetMessage(key string, args ...interface{}) string
16
}
Copied!
Retrieving Translation
Use of
context.Tr method as a shortcut to get a translated text for this request.1
func(ctx iris.Context) {
2
text := ctx.Tr("hi", "name")
3
// [...]
4
}
Copied!
Inside Views
1
func(ctx iris.Context) {
2
ctx.View("index.html", iris.Map{
3
"tr": ctx.Tr,
4
})
5
}
Copied!
Last modified 1yr ago