mirror of
https://github.com/1f349/violet.git
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120 lines
2.8 KiB
Go
120 lines
2.8 KiB
Go
package router
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import (
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"fmt"
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"github.com/1f349/violet/proxy"
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"github.com/1f349/violet/target"
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"github.com/1f349/violet/utils"
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"github.com/mrmelon54/trie"
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"net/http"
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"strings"
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)
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type Router struct {
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route map[string]*trie.Trie[target.Route]
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redirect map[string]*trie.Trie[target.Redirect]
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notFound http.Handler
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proxy *proxy.HybridTransport
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}
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func New(proxy *proxy.HybridTransport) *Router {
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return &Router{
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route: make(map[string]*trie.Trie[target.Route]),
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redirect: make(map[string]*trie.Trie[target.Redirect]),
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notFound: http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
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_, _ = fmt.Fprintf(rw, "%d %s\n", http.StatusNotFound, http.StatusText(http.StatusNotFound))
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}),
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proxy: proxy,
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}
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}
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func (r *Router) hostRoute(host string) *trie.Trie[target.Route] {
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h := r.route[host]
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if h == nil {
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h = &trie.Trie[target.Route]{}
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r.route[host] = h
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}
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return h
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}
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func (r *Router) hostRedirect(host string) *trie.Trie[target.Redirect] {
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h := r.redirect[host]
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if h == nil {
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h = &trie.Trie[target.Redirect]{}
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r.redirect[host] = h
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}
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return h
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}
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func (r *Router) AddRoute(t target.Route) {
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t.Proxy = r.proxy
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host, path := utils.SplitHostPath(t.Src)
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r.hostRoute(host).PutString(path, t)
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}
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func (r *Router) AddRedirect(t target.Redirect) {
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host, path := utils.SplitHostPath(t.Src)
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r.hostRedirect(host).PutString(path, t)
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}
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func (r *Router) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
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if req.URL.Path == "" {
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req.URL.Path = "/"
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}
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host, _, _ := utils.SplitDomainPort(req.Host, 0)
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if r.serveRedirectHTTP(rw, req, host) {
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return
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}
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if r.serveRouteHTTP(rw, req, host) {
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return
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}
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parentHostDot := strings.IndexByte(host, '.')
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if parentHostDot == -1 {
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r.notFound.ServeHTTP(rw, req)
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return
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}
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wildcardHost := "*" + host[parentHostDot:]
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if r.serveRedirectHTTP(rw, req, wildcardHost) {
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return
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}
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if r.serveRouteHTTP(rw, req, wildcardHost) {
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return
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}
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utils.RespondVioletError(rw, http.StatusTeapot, "No route")
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}
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func (r *Router) serveRouteHTTP(rw http.ResponseWriter, req *http.Request, host string) bool {
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h := r.route[host]
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return getServeData(rw, req, h)
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}
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func (r *Router) serveRedirectHTTP(rw http.ResponseWriter, req *http.Request, host string) bool {
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h := r.redirect[host]
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return getServeData(rw, req, h)
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}
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type serveDataInterface interface {
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HasFlag(flag target.Flags) bool
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ServeHTTP(rw http.ResponseWriter, req *http.Request)
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}
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func getServeData[T serveDataInterface](rw http.ResponseWriter, req *http.Request, h *trie.Trie[T]) bool {
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if h == nil {
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return false
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}
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pairs := h.GetAllKeyValues([]byte(req.URL.Path))
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for i := len(pairs) - 1; i >= 0; i-- {
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if pairs[i].Value.HasFlag(target.FlagPre) || pairs[i].Key == req.URL.Path {
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req.URL.Path = strings.TrimPrefix(req.URL.Path, pairs[i].Key)
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pairs[i].Value.ServeHTTP(rw, req)
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return true
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}
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}
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return false
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}
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