{"record":{"id":"9ea67467901c9d66","repo":"xtekky/gpt4free","slug":"oauth-error-oauthcallbackhandler-callback-error","errorCode":null,"errorMessage":"OAuth error: {OAuthCallbackHandler.callback_error}","messagePattern":"OAuth error: (.+?)","errorType":"exception","errorClass":"RuntimeError","httpStatus":null,"severity":"error","filePath":"g4f/Provider/needs_auth/Antigravity.py","lineNumber":312,"sourceCode":"        \"\"\"Wait for OAuth callback and return result.\"\"\"\n        # Poll for result instead of blocking on thread join\n        start_time = time.time()\n        while time.time() - start_time < self.timeout:\n            if (\n                OAuthCallbackHandler.callback_result\n                or OAuthCallbackHandler.callback_error\n            ):\n                break\n            time.sleep(0.1)\n\n        # Signal thread to stop\n        self._stop_flag = True\n\n        if self._thread:\n            self._thread.join(timeout=2.0)\n\n        if OAuthCallbackHandler.callback_error:\n            raise RuntimeError(f\"OAuth error: {OAuthCallbackHandler.callback_error}\")\n\n        return OAuthCallbackHandler.callback_result\n\n    def stop(self):\n        \"\"\"Stop the callback server.\"\"\"\n        self._stop_flag = True\n        if self.server:\n            try:\n                self.server.server_close()\n            except Exception:\n                pass\n            self.server = None\n\n\n# Antigravity base URLs with fallback order\n# For streaming/generation: prefer production (most stable)\n# For discovery: sandbox daily may work faster\nBASE_URLS = [","sourceCodeStart":294,"sourceCodeEnd":330,"githubUrl":"https://github.com/xtekky/gpt4free/blob/973504e1770928ed5fb82f43da528f441ad9ddc3/g4f/Provider/needs_auth/Antigravity.py#L294-L330","documentation":"RuntimeError raised by Antigravity's local OAuth callback flow: after the loopback HTTP server thread finishes (callback received, timeout, or stop flag), OAuthCallbackHandler.callback_error is non-empty — the OAuth redirect arrived carrying an error (e.g. error=access_denied in the query string) instead of an authorization code. The message surfaces exactly what the callback handler recorded.","triggerScenarios":"Running the Antigravity OAuth login (local callback server + browser consent) and the provider redirecting back with an error query param: user denied consent, Google/Antigravity returned invalid_grant or access_denied, the client_id/redirect_uri misregistration produced an auth error, or the auth endpoint itself reported an error.","commonSituations":"Users cancelling the consent screen; OAuth client configuration changes upstream (redirect URI no longer registered); sandboxed/headless environments where the browser step is intercepted; clock skew breaking state validation.","solutions":["Read callback_error in the message — e.g. 'access_denied' means the consent was refused; retry and approve it.","Ensure the loopback callback port is reachable and not occupied by another process, so the real redirect (not an error) is captured.","Re-run the login flow from scratch to regenerate fresh state/nonce; stale half-completed flows commonly error out.","If the error mentions redirect_uri or client registration, the provider's OAuth client config changed — update g4f or use the service-account credential path (ANTIGRAVITY_SERVICE_ACCOUNT) instead."],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":"try:\n    result = handler.wait_for_callback()\nexcept RuntimeError as e:\n    if 'OAuth error' in str(e):\n        if 'access_denied' in str(e):\n            raise PermissionError('User denied Antigravity consent') from e\n        raise  # config/registration errors need manual attention","preventionTips":["Complete the consent screen without cancelling.","Ensure the loopback callback port is free before starting the flow.","Surface callback_error verbatim in logs — OAuth error codes pinpoint the cause."],"tags":["oauth","antigravity","auth","callback"],"backgroundTag":null,"analyzedSha":"973504e1770928ed5fb82f43da528f441ad9ddc3","analyzedAt":"2026-08-14T23:45:32.408Z","schemaVersion":2},"datasetVersion":"2026-08-15T17:31:12.345Z"}