【Go入门学习】golang自定义路由控制实现（二）

@Controller

	o := odserver.Default()
	o.Start("/main").
	Target("/test/").Get(HelloServer).Post(HelloServer).Delete(HelloServer).And().
		Target("/test2").Get(HelloServer2)
	o.Start("/{test}/main/").Target("/number/{number}").
		Get(HelloServer3).Post(HelloServer4)

	http.ListenAndServe(":8080",o)

func HelloServer3(c *odserver.Context) {

	fmt.Fprint(c.Rw, c.Params)
}

\w*/{test}/main/number/{number}/\w*/main/number/\w*

o.Start("/main").
Target("/test/").Get(HelloServer).Post(HelloServer).Delete(HelloServer).And().
Target("/test2").Get(HelloServer2)

HandlerObject

type FuncObject struct {
	params []string
//对应编写的接口，IHandlerFunc只是个空接口
	f      IHandlerFunc
	exist  bool
	*httpConfig
}
//方法函数映射，0代表GET方法下的接口
type methodFuncs []FuncObject
/**
	关键struct，代表每个实体的请求
 */
type HandlerObject struct {
	*Router
	//对应占位符的参数
	params    []string
	//对该请求的http配置
	*httpConfig
	//请求路径 即start+target的路径
	path        string
	startPath   string
//方法函数映射
	methodFuncs methodFuncs
}

HandlerObjectRouterRoutermap[string]*HandlerObject

func NewRouter() *Router {
	return &Router{
		handler:   make(map[string]*HandlerObject),
		regexpMap: make(map[*regexp.Regexp]*HandlerObject),
	}
}

type Router struct {
	handler
	regexpMap
}

regexpMap

func (r *Router) doUrlMapping(url string, method int) (*HandlerObject,bool) {
	ch := make(chan *HandlerObject)
	//精准匹配
	go func() {
		if ho, ok := r.handler[url]; ok {
			ch <- ho
		}
	}()
	//正则匹配
	go func() {
		for k, v := range r.regexpMap {
			if k.MatchString(url) {
				pathArray := strings.Split(url, "/")[1:]
				regexpArray := strings.Split(k.String(), "/")[1:]
				if len(pathArray) == len(regexpArray) {
                  //设置参数
					paramsNum := 0
					for i := 0; i < len(pathArray); i++ {
						if matcher.IsPattern(regexpArray[i]) {
							v.params[paramsNum] = pathArray[i]
							paramsNum++
						}
					}
					v.params = v.params[:paramsNum]
				}
				ch <- v
			}
		}
	}()
	select {
	case ho := <-ch:
		{
			return ho,true
		}
	case <-time.After(2e6):
		{
			return &HandlerObject{},false
		}
	}
}

注册接口的代码如下

func (r *Router) Start(url string) *HandlerObject {
	return NewHandlerObject(r, AddSlash(url))
}

func (ho *HandlerObject) And() *HandlerObject {
	if ho.Router == nil || ho.startPath == "" {
		panic("ho.Router is nil or startPath is unknown，maybe u should use Start()")
	}
	return NewHandlerObject(ho.Router, ho.startPath)
}

func (ho *HandlerObject) Target(url string) *HandlerObject {
	//设置完整的路径
	if ho.startPath == "/" {
		ho.path = ho.startPath + DeleteSlash(url)
	} else {
		if strings.HasSuffix(ho.startPath, "/") {
			url = DeleteSlash(url)
		} else {
			url = AddSlash(url)
		}
		ho.path = ho.startPath + url
	}
	//尝试将url转换成正则表达式，如果没有占位符，则转换不成功
	pattern, ok := matcher.ToPattern(ho.path)
	if ok {
		ho.path = pattern
		re, err := regexp.Compile(pattern)
		if err != nil {
			panic("error compile pattern:" + pattern)
		}
		ho.Router.regexpMap[re] = ho
	} else {
		ho.handler[ho.path] = ho
	}
	return ho
}
func AddSlash(s string) string {
	if !strings.HasPrefix(s, "/") {
		s = "/" + s
	}
	return s
}

func DeleteSlash(s string) string {
	if strings.HasPrefix(s, "/") {
		array := strings.SplitN(s, "/", 2)
		s = array[1]
	}
	return s
}

func (ho *HandlerObject) Get(f IHandlerFunc) *HandlerObject {
	if ho.methodFuncs[GET].exist {
		panic("GetFunc has existed")
	}

	ho.methodFuncs[GET] = NewFuncObject(f)
	return ho
}

ContextRequestresponseWriterRequestresponseWriter

type Context struct {
	Req    Request
	Rw     responseWriter
	//对应restful的参数值
	Params []string
}

    源码路径：https://gitee.com/1995zzf/go-oneday
    路漫漫其修远兮，客官点个赞呗