PR #35004: fix: handle URL construction error when switching to Visual Editor

• Repository: langgenius/dify
• Author: samrusani
• State: closed | merged: True
• Link: https://github.com/langgenius/dify/pull/35004

Description (problem / solution / changelog)

Summary

The jsonschema library's Validator.validate() internally calls new URL() for URI resolution of schema $id references, which can throw "Failed to construct 'URL': Invalid URL" in browser environments. This uncaught error propagated up to handleTabChange, where it was caught as a parse error — blocking the switch from JSON Schema to Visual Editor.

Added a try-catch in draft07Validator (web/utils/validators.ts) to handle this gracefully, returning empty validation errors on failure since structural schema validation is already covered by preValidateSchema.

Fixes #34841

Screenshots

N/A — the fix restores expected behavior (tab switching works without errors).

Checklist

• This change requires a documentation update, included: Dify Document
• I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
• I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• I've updated the documentation accordingly.
• I ran make lint and make type-check (backend) and cd web && pnpm exec vp staged (frontend) to appease the lint gods

From Claude Code

Changed files

• web/utils/validators.ts (modified, +13/-3)