Merge pull request #391 from zitadel/fix-saml

fix(saml): requestId serializing

apps/login/src/app/login/route.ts

@@ -81,9 +81,12 @@ export async function GET(request: NextRequest) {
 
   // internal request id which combines authRequest and samlRequest with the prefix oidc_ or saml_
   let requestId =
-    searchParams.get("requestId") ||
-    `oidc_${oidcRequestId}` ||
-    `saml_${samlRequestId}`;
+    searchParams.get("requestId") ??
+    (oidcRequestId
+      ? `oidc_${oidcRequestId}`
+      : samlRequestId
+        ? `saml_${samlRequestId}`
+        : undefined);
 
   const sessionId = searchParams.get("sessionId");
 
@@ -470,9 +473,10 @@ export async function GET(request: NextRequest) {
       if (url && binding.case === "redirect") {
         return NextResponse.redirect(url);
       } else if (url && binding.case === "post") {
+        // Create form data after SAML standard
         const formData = {
-          key1: "value1",
-          key2: "value2",
+          RelayState: binding.value.relayState,
+          SAMLResponse: binding.value.samlResponse,
         };
 
         // Convert form data to URL-encoded string