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mux.go
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mux.go
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package mux
import (
"net/http"
)
// Mux is an HTTP request multiplexer.
type Mux struct {
http.ServeMux
beforeHandlers []http.Handler
afterHandlers []http.Handler
recoverHandler func(w http.ResponseWriter, r *http.Request)
}
// ServeHTTP dispatches the request to the handler whose
// pattern most closely matches the request URL.
func (mux *Mux) ServeHTTP(w http.ResponseWriter, r *http.Request) {
if mux.recoverHandler != nil {
defer mux.recoverHandler(w, r)
}
mux.ServeMux.ServeHTTP(w, r)
}
// HandleFunc registers the handler function for the given pattern.
func (mux *Mux) HandleFunc(pattern string, handlerFuns ...func(http.ResponseWriter, *http.Request)) {
if len(handlerFuns) == 0 {
panic("http: empty handlers")
}
handlers := make([]http.Handler, len(handlerFuns))
for i, hf := range handlerFuns {
handlers[i] = http.HandlerFunc(hf)
}
mux.Handle(pattern, handlers...)
}
// Handle registers the handler for the given pattern.
// If a handler already exists for pattern, Handle panics.
func (mux *Mux) Handle(pattern string, handlers ...http.Handler) {
if len(handlers) == 0 {
panic("http: empty handlers")
}
handlers = append(mux.beforeHandlers, handlers...)
handlers = append(handlers, mux.afterHandlers...)
mux.ServeMux.Handle(pattern, Handlers(handlers))
}
// Before set the handler before all handlers.
func (mux *Mux) Before(handler func(w http.ResponseWriter, r *http.Request)) {
mux.beforeHandlers = append(mux.beforeHandlers, http.HandlerFunc(handler))
}
// After set the handler after all handlers.
func (mux *Mux) After(handler func(w http.ResponseWriter, r *http.Request)) {
mux.afterHandlers = append(mux.afterHandlers, http.HandlerFunc(handler))
}
// Recover set the recover handler
func (mux *Mux) Recover(handler func(w http.ResponseWriter, r *http.Request)) {
mux.recoverHandler = handler
}