Format and remove 13.3.md spaces
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vCaesar
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zh/13.3.md
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zh/13.3.md
@@ -10,140 +10,140 @@ MVC设计模式是目前Web应用开发中最常见的架构模式，通过分
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前面小节介绍了路由实现了注册struct的功能，而struct中实现了REST方式，因此我们需要设计一个用于逻辑处理controller的基类，这里主要设计了两个类型，一个struct、一个interface
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```Go
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type Controller struct {
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Ct *Context
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Tpl *template.Template
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Data map[interface{}]interface{}
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ChildName string
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TplNames string
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Layout []string
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TplExt string
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}
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type Controller struct {
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Ct *Context
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Tpl *template.Template
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Data map[interface{}]interface{}
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ChildName string
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TplNames string
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Layout []string
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TplExt string
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}
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type ControllerInterface interface {
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Init(ct *Context, cn string) //初始化上下文和子类名称
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Prepare() //开始执行之前的一些处理
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Get() //method=GET的处理
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Post() //method=POST的处理
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Delete() //method=DELETE的处理
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Put() //method=PUT的处理
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Head() //method=HEAD的处理
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Patch() //method=PATCH的处理
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Options() //method=OPTIONS的处理
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Finish() //执行完成之后的处理
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Render() error //执行完method对应的方法之后渲染页面
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}
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type ControllerInterface interface {
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Init(ct *Context, cn string) //初始化上下文和子类名称
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Prepare() //开始执行之前的一些处理
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Get() //method=GET的处理
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Post() //method=POST的处理
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Delete() //method=DELETE的处理
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Put() //method=PUT的处理
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Head() //method=HEAD的处理
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Patch() //method=PATCH的处理
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Options() //method=OPTIONS的处理
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Finish() //执行完成之后的处理
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Render() error //执行完method对应的方法之后渲染页面
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}
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```
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那么前面介绍的路由add函数的时候是定义了ControllerInterface类型，因此，只要我们实现这个接口就可以，所以我们的基类Controller实现如下的方法：
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```Go
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func (c *Controller) Init(ct *Context, cn string) {
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c.Data = make(map[interface{}]interface{})
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c.Layout = make([]string, 0)
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c.TplNames = ""
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c.ChildName = cn
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c.Ct = ct
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c.TplExt = "tpl"
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}
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func (c *Controller) Init(ct *Context, cn string) {
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c.Data = make(map[interface{}]interface{})
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c.Layout = make([]string, 0)
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c.TplNames = ""
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c.ChildName = cn
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c.Ct = ct
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c.TplExt = "tpl"
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}
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func (c *Controller) Prepare() {
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func (c *Controller) Prepare() {
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}
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}
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func (c *Controller) Finish() {
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func (c *Controller) Finish() {
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}
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}
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func (c *Controller) Get() {
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http.Error(c.Ct.ResponseWriter, "Method Not Allowed", 405)
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}
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func (c *Controller) Get() {
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http.Error(c.Ct.ResponseWriter, "Method Not Allowed", 405)
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}
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func (c *Controller) Post() {
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http.Error(c.Ct.ResponseWriter, "Method Not Allowed", 405)
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}
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func (c *Controller) Post() {
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http.Error(c.Ct.ResponseWriter, "Method Not Allowed", 405)
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}
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func (c *Controller) Delete() {
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http.Error(c.Ct.ResponseWriter, "Method Not Allowed", 405)
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}
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func (c *Controller) Delete() {
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http.Error(c.Ct.ResponseWriter, "Method Not Allowed", 405)
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}
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func (c *Controller) Put() {
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http.Error(c.Ct.ResponseWriter, "Method Not Allowed", 405)
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}
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func (c *Controller) Put() {
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http.Error(c.Ct.ResponseWriter, "Method Not Allowed", 405)
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}
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func (c *Controller) Head() {
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http.Error(c.Ct.ResponseWriter, "Method Not Allowed", 405)
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}
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func (c *Controller) Head() {
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http.Error(c.Ct.ResponseWriter, "Method Not Allowed", 405)
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}
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func (c *Controller) Patch() {
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http.Error(c.Ct.ResponseWriter, "Method Not Allowed", 405)
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}
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func (c *Controller) Patch() {
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http.Error(c.Ct.ResponseWriter, "Method Not Allowed", 405)
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}
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func (c *Controller) Options() {
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http.Error(c.Ct.ResponseWriter, "Method Not Allowed", 405)
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}
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func (c *Controller) Options() {
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http.Error(c.Ct.ResponseWriter, "Method Not Allowed", 405)
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}
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func (c *Controller) Render() error {
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if len(c.Layout) > 0 {
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var filenames []string
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for _, file := range c.Layout {
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filenames = append(filenames, path.Join(ViewsPath, file))
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}
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t, err := template.ParseFiles(filenames...)
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if err != nil {
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Trace("template ParseFiles err:", err)
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}
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err = t.ExecuteTemplate(c.Ct.ResponseWriter, c.TplNames, c.Data)
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if err != nil {
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Trace("template Execute err:", err)
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}
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} else {
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if c.TplNames == "" {
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c.TplNames = c.ChildName + "/" + c.Ct.Request.Method + "." + c.TplExt
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}
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t, err := template.ParseFiles(path.Join(ViewsPath, c.TplNames))
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if err != nil {
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Trace("template ParseFiles err:", err)
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}
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err = t.Execute(c.Ct.ResponseWriter, c.Data)
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if err != nil {
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Trace("template Execute err:", err)
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}
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func (c *Controller) Render() error {
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if len(c.Layout) > 0 {
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var filenames []string
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for _, file := range c.Layout {
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filenames = append(filenames, path.Join(ViewsPath, file))
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}
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t, err := template.ParseFiles(filenames...)
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if err != nil {
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Trace("template ParseFiles err:", err)
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}
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err = t.ExecuteTemplate(c.Ct.ResponseWriter, c.TplNames, c.Data)
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if err != nil {
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Trace("template Execute err:", err)
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}
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} else {
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if c.TplNames == "" {
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c.TplNames = c.ChildName + "/" + c.Ct.Request.Method + "." + c.TplExt
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}
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t, err := template.ParseFiles(path.Join(ViewsPath, c.TplNames))
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if err != nil {
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Trace("template ParseFiles err:", err)
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}
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err = t.Execute(c.Ct.ResponseWriter, c.Data)
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if err != nil {
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Trace("template Execute err:", err)
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}
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return nil
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}
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return nil
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}
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func (c *Controller) Redirect(url string, code int) {
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c.Ct.Redirect(code, url)
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}
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func (c *Controller) Redirect(url string, code int) {
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c.Ct.Redirect(code, url)
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}
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```
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上面的controller基类已经实现了接口定义的函数，通过路由根据url执行相应的controller的原则，会依次执行如下：
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```Go
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Init() 初始化
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Prepare() 执行之前的初始化，每个继承的子类可以来实现该函数
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method() 根据不同的method执行不同的函数：GET、POST、PUT、HEAD等，子类来实现这些函数，如果没实现，那么默认都是403
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Render() 可选，根据全局变量AutoRender来判断是否执行
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Finish() 执行完之后执行的操作，每个继承的子类可以来实现该函数
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Init() 初始化
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Prepare() 执行之前的初始化，每个继承的子类可以来实现该函数
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method() 根据不同的method执行不同的函数：GET、POST、PUT、HEAD等，子类来实现这些函数，如果没实现，那么默认都是403
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Render() 可选，根据全局变量AutoRender来判断是否执行
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Finish() 执行完之后执行的操作，每个继承的子类可以来实现该函数
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```
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## 应用指南
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上面beego框架中完成了controller基类的设计，那么我们在我们的应用中可以这样来设计我们的方法：
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```Go
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package controllers
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package controllers
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import (
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"github.com/astaxie/beego"
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)
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import (
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"github.com/astaxie/beego"
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)
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type MainController struct {
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beego.Controller
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}
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type MainController struct {
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beego.Controller
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}
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func (this *MainController) Get() {
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this.Data["Username"] = "astaxie"
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this.Data["Email"] = "astaxie@gmail.com"
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this.TplNames = "index.tpl"
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}
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func (this *MainController) Get() {
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this.Data["Username"] = "astaxie"
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this.Data["Email"] = "astaxie@gmail.com"
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this.TplNames = "index.tpl"
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}
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```
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上面的方式我们实现了子类MainController，实现了Get方法，那么如果用户通过其他的方式(POST/HEAD等)来访问该资源都将返回403，而如果是Get来访问，因为我们设置了AutoRender=true，那么在执行完Get方法之后会自动执行Render函数，就会显示如下界面：
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@@ -152,16 +152,16 @@ MVC设计模式是目前Web应用开发中最常见的架构模式，通过分
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index.tpl的代码如下所示，我们可以看到数据的设置和显示都是相当的简单方便：
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```html
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<!DOCTYPE html>
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<html>
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<head>
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<title>beego welcome template</title>
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</head>
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<body>
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<h1>Hello, world!{{.Username}},{{.Email}}</h1>
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</body>
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</html>
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<!DOCTYPE html>
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<html>
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<head>
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<title>beego welcome template</title>
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</head>
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<body>
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<h1>Hello, world!{{.Username}},{{.Email}}</h1>
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</body>
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</html>
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```
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## links
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||||
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||||
Reference in New Issue
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