/*
* Copyright 2017-2019 Kopano and its licensors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package identifier
import (
"html/template"
"net/http"
"net/url"
"github.com/libregraph/lico/version"
)
var trampolinTemplate = template.Must(template.New("trampolin").Parse(`
`))
var trampolinScript = []byte(`(function(window) {
window.location.replace(document.body.getAttribute('trampolin'));
}(window));
`)
var trampolinVersion = url.QueryEscape(version.Version)
type trampolinData struct {
URI string
Version string
}
func (i *Identifier) writeTrampolinHTML(rw http.ResponseWriter, req *http.Request, uri *url.URL) {
data := &trampolinData{
URI: uri.String(),
Version: trampolinVersion,
}
rw.Header().Set("Content-Type", "text/html")
rw.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
rw.Header().Set("Pragma", "no-cache")
rw.Header().Set("Expires", "0")
err := trampolinTemplate.Execute(rw, data)
if err != nil {
i.logger.WithError(err).Errorln("failed to write trampolin")
}
}
func (i *Identifier) writeTrampolinScript(rw http.ResponseWriter, req *http.Request) {
rw.Header().Set("Content-Type", "application/javascript")
rw.Header().Set("Cache-Control", "public, max-age=31536000, immutable")
rw.Write(trampolinScript)
}