added status code for 419 Page Expired errors 10m

Author: cdsiats

src/Status.ts

@@ -191,6 +191,9 @@ export const codes: Record<string, ResponseStatus> = {
   // The user agent requested a resource that cannot legally  
   // be provided, such as a web page censored by a government.
   LEGAL_REASONS: { code: 451, status: 'Unavailable For Legal Reasons' },
+  // This status code means that the CSRF token sent by the client is incorrect
+  // or missing. This is used to prevent Cross-Site Request Forgery attacks.
+  PAGE_EXPIRED: { code: 419, status: 'Page Expired' },
 
   //------------------------------------------------------------------//
   // 500 Status Codes
@@ -288,6 +291,7 @@ const Status = {
   TOO_MANY: codes.TOO_MANY,
   HEADER_TOO_LARGE: codes.HEADER_TOO_LARGE,
   LEGAL_REASONS: codes.LEGAL_REASONS,
+  PAGE_EXPIRED: codes.PAGE_EXPIRED,
 
   //------------------------------------------------------------------//
   // 500 Status Codes

tests/Exception.test.ts

@@ -229,4 +229,15 @@ describe('Exception Tests', () => {
     expect(response.status).to.equal('Unknown');
   });
 
+  it('Should handle page expired error', () => {
+    try {
+      throw Exception.for('Page expired').withCode(419);
+    } catch (e) {
+      const exception = Exception.upgrade(e as Error);
+      const response = exception.toResponse();
+      expect(response.code).to.equal(419);
+      expect(response.status).to.equal('Page Expired');
+      expect(response.error).to.equal('Page expired');
+    }
+  });
 });