129 lines
2.6 KiB
Go
129 lines
2.6 KiB
Go
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package sux
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import (
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"net/http"
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)
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const (
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nomatch uint8 = iota
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static
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)
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type (
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node struct {
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term byte
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ntype uint8
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handler http.HandlerFunc
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child []*node
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}
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Router struct {
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route map[string]*node
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}
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)
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var root *Router
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func makenode(term byte) *node {
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return &node{
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term: term,
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child: make([]*node, 0),
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}
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}
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func (n *node) addchild(term byte) *node {
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if fn := n.findchild(term); fn == nil {
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nn := makenode(term)
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n.child = append(n.child, nn)
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return nn
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} else {
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return fn
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}
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}
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func (n *node) maketree(word []byte, handler http.HandlerFunc) {
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m := n
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for i, l := 1, len(word); i < l; i++ {
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m = m.addchild(word[i])
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}
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m.ntype = static
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m.handler = handler
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}
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func (n *node) findchild(term byte) *node {
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for _, v := range n.child {
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if v.term == term {
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return v
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}
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}
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return nil
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}
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func (n *node) find(word string) *node {
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ss := []byte(word)
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m := n
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for i, l := 1, len(ss); i < l; i++ {
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m = m.findchild(ss[i])
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if m == nil {
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return nil
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}
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}
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return m
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}
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func (n *Router) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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if m, exists := n.route[r.Method]; exists {
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m = m.find(r.URL.Path)
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if m == nil {
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http.NotFound(w, r)
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return
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}
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if m.ntype == nomatch {
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http.NotFound(w, r)
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return
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}
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m.handler(w, r)
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return
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}
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}
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func (n *Router) GET(path string, handler http.HandlerFunc) *Router {
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n.route["GET"].maketree([]byte(path), handler)
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return n
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}
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func (n *Router) POST(path string, handler http.HandlerFunc) *Router {
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n.route["POST"].maketree([]byte(path), handler)
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return n
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}
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func (n *Router) PUT(path string, handler http.HandlerFunc) *Router {
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n.route["PUT"].maketree([]byte(path), handler)
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return n
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}
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func (n *Router) PATCH(path string, handler http.HandlerFunc) *Router {
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n.route["PATCH"].maketree([]byte(path), handler)
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return n
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}
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func (n *Router) DELETE(path string, handler http.HandlerFunc) *Router {
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n.route["DELETE"].maketree([]byte(path), handler)
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return n
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}
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func (n *Router) OPTIONS(path string, handler http.HandlerFunc) *Router {
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n.route["OPTIONS"].maketree([]byte(path), handler)
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return n
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}
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func (n *Router) HEAD(path string, handler http.HandlerFunc) *Router {
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n.route["HEAD"].maketree([]byte(path), handler)
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return n
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}
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func New() *Router {
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root = &Router{route: make(map[string]*node)}
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root.route["GET"] = makenode([]byte("/")[0])
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root.route["POST"] = makenode([]byte("/")[0])
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root.route["PUT"] = makenode([]byte("/")[0])
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root.route["PATCH"] = makenode([]byte("/")[0])
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root.route["DELETE"] = makenode([]byte("/")[0])
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root.route["OPTIONS"] = makenode([]byte("/")[0])
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root.route["HEAD"] = makenode([]byte("/")[0])
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return root
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}
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