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handle.go
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handle.go
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// fhoe - Far Horizons order entry
// Copyright (c) 2021 Michael D Henderson
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
package controller
import (
"log"
"net/http"
"path"
"strings"
)
// Handle implements the http interface.
// This should be the only part of the controller that you need to customize for the ADR.
// Mostly that means wiring in the route.
func (ctl *Controller) Handle(w http.ResponseWriter, r *http.Request) {
log.Printf("[controller] %-7s %q\n", r.Method, r.URL.Path)
// shiftPath splits off the first component of p, which will be cleaned of
// relative components before processing. head will never contain a slash and
// tail will always be a rooted path without trailing slash.
shiftPath := func(p string) (head, tail string) {
p = path.Clean("/" + p)
i := strings.Index(p[1:], "/") + 1
if i <= 0 {
return p[1:], "/"
}
return p[1:i], p[i:]
}
originalURL := r.URL.Path
route, rest := shiftPath(r.URL.Path)
log.Printf("[controller] %-7s %q %s %s\n", r.Method, r.URL.Path, route, rest)
switch route {
case "", "index.html":
route, rest = shiftPath(rest)
switch route {
case "":
if act, ok := ctl.actions["/"]; ok {
var context struct{}
act.Handle(w, r, context)
return
}
}
}
log.Printf("[controller] %-7s %q: not matched\n", r.Method, originalURL)
w.WriteHeader(http.StatusNotFound)
}