add interface

README.md

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+## 行云 ##
+
+### 对象 ###
+
+- Server: pipe容器
+- Pipe: 对请求做前、后置处理
+- Context: 请求相关的数据
+
+### 接口 ###
+
+- http.Handler
+- pipe.Handler (negroni.Handler)
+- Config
+- Logger
+- Router: 用于Pipe路由Handler路由
+
+### 目标 ###
+
+- 提供机制、而不**只是**实现
+- 方便扩展
+- 默认配置功能强大、容易使用
+- 使用代码生成作为元编程
+- Everything is http.Handler
+
+### Core SubContext ###
+
+- Cookie
+- Session
+- XSRF
+- Flash
+- Render
+
+### Default PipeHandler ###
+
+- Logger
+- Recover
+- Static

config.go

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+package xingyun

context.go

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+package xingyun

doc.go

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+package xingyun

log.go

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+package xingyun
+
+type logger interface {
+	Infof(s string, o ...interface{})
+	Errorf(s string, o ...interface{})
+	Debugf(s string, o ...interface{})
+	Tracef(s string, o ...interface{})
+}

pipe.go

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+package xingyun
+
+import (
+	"net/http"
+
+	"github.com/codegangsta/negroni"
+)
+
+var (
+	DefaultPipeHandler = []PipeHandler{}
+)
+
+type PipeHandler interface {
+	ServeHTTP(w http.ResponseWriter, r *http.Request, next http.HandlerFunc)
+}
+
+type Pipe struct {
+	negroni *negroni.Negroni
+}
+
+func (p *Pipe) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	p.negroni.ServeHTTP(w, r)
+}
+
+func (p *Pipe) Use(handlers ...PipeHandler) {
+	if len(DefaultPipeHandler) != 0 && len(p.negroni.Handlers()) == 0 {
+		for _, h := range DefaultPipeHandler {
+			p.negroni.Use(h)
+		}
+	}
+	for _, h := range handlers {
+		p.negroni.Use(h)
+	}
+}

router.go

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+package xingyun
+
+import "net/http"
+
+type Router interface {
+	Route(r *http.Request) http.Handler
+}
+
+func RouterHandler(router Router) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		h := router.Route(r)
+		h.ServeHTTP(w, r)
+	}
+}

server.go

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+package xingyun
+
+import "net/http"
+
+type Server struct {
+	Config Config
+
+	pipeRouter Router
+}
+
+func NewServer(router Router) *Server {
+	return &Server{pipeRouter: router}
+}
+
+func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	h := RouterHandler(s.pipeRouter)
+	h(w, r)
+}
+
+func (s *Server) ListenAndServe(addr string) {
+	http.ListenAndServe(addr, s)
+}