HTTP 基本身份验证是对 Web 资源实施访问控制的最简单技术，因为它不需要 cookie、会话标识符或登录页面；相反，HTTP Basic 身份验证使用 HTTP 标头中的标准字段。

基本身份验证中间件包含在 Iris 框架中，因此您无需单独安装。

导入中间件：

import "github.com/kataras/iris/v12/middleware/basicauth"

使用其​Options​结构配置中间件：

opts := basicauth.Options{
    Allow: basicauth.AllowUsers(map[string]string{
        "username": "password",
    }),
    Realm:        "Authorization Required",
    ErrorHandler: basicauth.DefaultErrorHandler,
    // [...more options]
}

初始化中间件：

auth := basicauth.New(opts)

上述步骤与Default功能相同：

auth := basicauth.Default(map[string]string{
    "username": "password",
})

使用自定义的用户切片：

// The struct value MUST contain a Username and Passwords fields
// or GetUsername() string and GetPassword() string methods.
type User struct {
    Username string
    Password string
}

// [...]
auth := basicauth.Default([]User{...})

可选地从文件加载用户，密码使用bcrypt加密：

bcrypt包：golang.org/x/crypto/bcrypt

auth := basicauth.Load("users.yml", basicauth.BCRYPT)

同样可以使用Options（推荐）实现：

opts := basicauth.Options{
    Allow: basicauth.AllowUsersFile("users.yml", basicauth.BCRYPT),
    Realm: basicauth.DefaultRealm,
    // [...more options]
}

auth := basicauth.New(opts)

users.yml将如下所示：

- username: kataras
  password: $2a$10$Irg8k8HWkDlvL0YDBKLCYee6j6zzIFTplJcvZYKA.B8/clHPZn2Ey
  # encrypted of kataras_pass
  role: admin
- username: makis
  password: $2a$10$3GXzp3J5GhHThGisbpvpZuftbmzPivDMo94XPnkTnDe7254x7sJ3O
  # encrypted of makis_pass
  role: member

注册中间件：

// Register to all matched routes
// under a Party and its children.
app.Use(auth)

// OR/and register to all http error routes.
app.UseError(auth)

// OR register under a path prefix of a specific Party,
// including all http errors of this path prefix.
app.UseRouter(auth)

// OR register to a specific Route before its main handler.
app.Post("/protected", auth, routeHandler)

检索用户名和密码：

func routeHandler(ctx iris.Context) {
    username, password, _ := ctx.Request().BasicAuth()
    // [...]
}

检索 User 值：

func routeHandler(ctx iris.Context) {
    user := ctx.User().(*iris.SimpleUser)
    // user.Username
    // user.Password
}