Handle next parameters even through OIDC

auth_oidc.go

@@ -20,6 +20,7 @@ var (
 	oidcRedirectURL = "https://srs.nemunai.re"
 	oauth2Config    oauth2.Config
 	oidcVerifier    *oidc.IDTokenVerifier
+	nextSessionMap  = map[string]string{}
 )
 
 func init() {
@@ -60,6 +61,12 @@ func initializeOIDC() {
 
 func redirectOIDC_CRI(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
 	session, err := NewSession()
+
+	// Save next parameter
+	if len(r.URL.Query().Get("next")) > 0 {
+		nextSessionMap[fmt.Sprintf("%x", session.Id)] = r.URL.Query().Get("next")
+	}
+
 	if err != nil {
 		http.Error(w, fmt.Sprintf("{'errmsg':%q}", err.Error()), http.StatusInternalServerError)
 	} else {
@@ -121,5 +128,12 @@ func OIDC_CRI_complete(w http.ResponseWriter, r *http.Request, ps httprouter.Par
 		return
 	}
 
-	http.Redirect(w, r, "/", http.StatusFound)
+	// Retrieve next URL associated with session
+	if next, ok := nextSessionMap[fmt.Sprintf("%x", session.Id)]; ok {
+		http.Redirect(w, r, next, http.StatusFound)
+		delete(nextSessionMap, fmt.Sprintf("%x", session.Id))
+	} else {
+		http.Redirect(w, r, "/", http.StatusFound)
+	}
+
 }