XSLT API Client

Leave empty for direct connection. If using proxy, credentials will be sent via POST body over HTTPS.
Understanding the CORS/Preflight Error (Click to Expand)

Why this error occurs:

  • Preflight Request: Browser sends OPTIONS request before your GET when using Authorization header
  • Server Redirect: Your API server redirects the preflight (HTTP→HTTPS or auth redirect)
  • Browser Blocks: Browsers don't allow redirects during preflight for security

Solutions:

  1. Try "URL Credentials" method above (avoids preflight)
  2. Use browser extension: "CORS Unblock" or "Allow CORS"
  3. Run Chrome with: --disable-web-security --user-data-dir=/tmp/chrome
  4. Ask API provider to fix CORS headers or avoid redirects on OPTIONS requests
XSLT Transformation (click to expand/collapse) ▼
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