MVC基础用法
目录结构
主目录
basic
—— main.go
代码示例
main.go
package main
import (
"fmt"
"github.com/kataras/iris"
"github.com/kataras/iris/sessions"
"github.com/kataras/iris/mvc"
)
func main() {
app := iris.New()
app.Logger().SetLevel("debug")
mvc.Configure(app.Party("/basic"), basicMVC)
app.Run(iris.Addr(":8080"))
}
func basicMVC(app *mvc.Application) {
//当然,你可以在MVC应用程序中使用普通的中间件。
app.Router.Use(func(ctx iris.Context) {
ctx.Application().Logger().Infof("Path: %s", ctx.Path())
ctx.Next()
})
//把依赖注入,controller(s)绑定
//可以是一个接受iris.Context并返回单个值的函数(动态绑定)
//或静态结构值(service)。
app.Register(
sessions.New(sessions.Config{}).Start,
&prefixedLogger{prefix: "DEV"},
)
// GET: http://localhost:8080/basic
// GET: http://localhost:8080/basic/custom
app.Handle(new(basicController))
//所有依赖项被绑定在父 *mvc.Application
//被克隆到这个新子身上,父的也可以访问同一个会话。
// GET: http://localhost:8080/basic/sub
app.Party("/sub").Handle(new(basicSubController))
}
// If controller's fields (or even its functions) expecting an interface
// but a struct value is binded then it will check
// if that struct value implements
// the interface and if true then it will add this to the
// available bindings, as expected, before the server ran of course,
// remember? Iris always uses the best possible way to reduce load
// on serving web resources.
//如果控制器结构体的字段(甚至其方法)需要接口
//但结构值是绑定的,然后它会检查
//如果该结构值实现
//接口,如果为true,则将其添加到在服务器运行之前,正如预期的那样可用绑定,
//记得吗? Iris总是使用最好的方法来减少负载关于提供网络资源。
type LoggerService interface {
Log(string)
}
type prefixedLogger struct {
prefix string
}
func (s *prefixedLogger) Log(msg string) {
fmt.Printf("%s: %s\n", s.prefix, msg)
}
type basicController struct {
Logger LoggerService
Session *sessions.Session
}
func (c *basicController) BeforeActivation(b mvc.BeforeActivation) {
b.Handle("GET", "/custom", "Custom")
}
func (c *basicController) AfterActivation(a mvc.AfterActivation) {
if a.Singleton() {
panic("basicController should be stateless,a request-scoped,we have a 'Session' which depends on the context.")
}
}
func (c *basicController) Get() string {
count := c.Session.Increment("count", 1)
body := fmt.Sprintf("Hello from basicController\nTotal visits from you: %d", count)
c.Logger.Log(body)
return body
}
func (c *basicController) Custom() string {
return "custom"
}
type basicSubController struct {
Session *sessions.Session
}
func (c *basicSubController) Get() string {
count := c.Session.GetIntDefault("count", 1)
return fmt.Sprintf("Hello from basicSubController.\nRead-only visits count: %d", count)
}
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