flutter network_error ai_generated true

XMLHttpRequest error: CORS blocked in Flutter Web

ID: flutter/web-cors-error

Also available as: JSON · Markdown
82%Fix Rate
86%Confidence
3Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3 active — — —

Root Cause

Flutter Web HTTP requests blocked by CORS.

generic

Workarounds

  1. 90% success Configure server to return proper CORS headers
  2. 88% success Use server-side proxy for third-party API calls

Dead Ends

Common approaches that don't work:

  1. Use no-cors mode 82% fail

    Cant read response body

  2. Disable CORS in browser for testing 78% fail

    Not applicable to users