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114 lines
3.3 KiB
Go
114 lines
3.3 KiB
Go
/*
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Copyright 2020, 2021 Jan Dittberner
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package handlers
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import (
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"context"
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"fmt"
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"html/template"
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"net/http"
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"net/url"
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"github.com/lestrrat-go/jwx/jwk"
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"github.com/nicksnyder/go-i18n/v2/i18n"
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"git.cacert.org/oidc_demo_app/services"
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)
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type indexHandler struct {
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bundle *i18n.Bundle
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indexTemplate *template.Template
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keySet jwk.Set
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logoutUrl string
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messageCatalog *services.MessageCatalog
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serverAddr string
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}
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func (h *indexHandler) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
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if request.Method != http.MethodGet {
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http.Error(writer, http.StatusText(http.StatusMethodNotAllowed), http.StatusMethodNotAllowed)
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return
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}
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if request.URL.Path != "/" {
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http.NotFound(writer, request)
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return
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}
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accept := request.Header.Get("Accept-Language")
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localizer := i18n.NewLocalizer(h.bundle, accept)
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writer.WriteHeader(http.StatusOK)
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session, err := services.GetSessionStore().Get(request, sessionName)
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if err != nil {
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http.Error(writer, err.Error(), http.StatusInternalServerError)
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return
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}
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logoutUrl, err := url.Parse(h.logoutUrl)
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if err != nil {
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http.Error(writer, err.Error(), http.StatusInternalServerError)
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return
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}
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var idToken string
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var ok bool
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if idToken, ok = session.Values[sessionKeyIdToken].(string); ok {
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logoutUrl.RawQuery = url.Values{
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"id_token_hint": []string{idToken},
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"post_logout_redirect_uri": []string{fmt.Sprintf("https://%s/after-logout", h.serverAddr)},
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}.Encode()
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} else {
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return
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}
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oidcToken, err := ParseIdToken(idToken, h.keySet)
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if err != nil {
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http.Error(writer, err.Error(), http.StatusInternalServerError)
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return
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}
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writer.Header().Add("Content-Type", "text/html")
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err = h.indexTemplate.Lookup("base").Execute(writer, map[string]interface{}{
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"Title": h.messageCatalog.LookupMessage("IndexTitle", nil, localizer),
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"Greeting": h.messageCatalog.LookupMessage("IndexGreeting", map[string]interface{}{
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"User": oidcToken.Name(),
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}, localizer),
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"IntroductionText": h.messageCatalog.LookupMessage("IndexIntroductionText", nil, localizer),
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"LogoutLabel": h.messageCatalog.LookupMessage("LogoutLabel", nil, localizer),
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"LogoutURL": logoutUrl.String(),
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})
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if err != nil {
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http.Error(writer, err.Error(), http.StatusInternalServerError)
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return
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}
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}
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func NewIndexHandler(ctx context.Context, serverAddr string) (*indexHandler, error) {
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indexTemplate, err := template.ParseFiles(
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"templates/base.gohtml", "templates/index.gohtml")
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if err != nil {
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return nil, err
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}
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return &indexHandler{
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bundle: services.GetI18nBundle(ctx),
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indexTemplate: indexTemplate,
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keySet: services.GetJwkSet(ctx),
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logoutUrl: services.GetOidcConfig(ctx).EndSessionEndpoint,
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messageCatalog: services.GetMessageCatalog(ctx),
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serverAddr: serverAddr,
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}, nil
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}
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