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hydra_oidc_poc/app/handlers/common.go

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2020-12-31 13:19:21 +01:00
package handlers
import (
"encoding/base64"
"net/http"
"net/url"
"golang.org/x/oauth2"
"git.cacert.org/oidc_login/app/services"
commonServices "git.cacert.org/oidc_login/common/services"
)
const sessionName = "resource_session"
func Authenticate(oauth2Config *oauth2.Config, clientId string) func(http.Handler) http.Handler {
return func(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
session, err := services.GetSessionStore().Get(r, sessionName)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
if _, ok := session.Values[sessionKeyUserId]; ok {
next.ServeHTTP(w, r)
return
}
session.Values[sessionRedirectTarget] = r.URL.String()
if err = session.Save(r, w); err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
var authUrl *url.URL
if authUrl, err = url.Parse(oauth2Config.Endpoint.AuthURL); err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
queryValues := authUrl.Query()
queryValues.Set("client_id", clientId)
queryValues.Set("response_type", "code")
queryValues.Set("scope", "openid offline_access profile email")
queryValues.Set("state", base64.URLEncoding.EncodeToString(commonServices.GenerateKey(8)))
authUrl.RawQuery = queryValues.Encode()
w.Header().Set("Location", authUrl.String())
w.WriteHeader(http.StatusFound)
})
}
}