使用AWS Amplify与React Native时api.get调用报federatedInfo错误求助

Hey there! I totally get not wanting to use withAuthenticator when you’ve built custom auth flows—let’s walk through how to resolve this error without it. The message you’re seeing usually stems from missing or misconfigured authentication context when making your API Gateway call, so let’s tackle that step by step:

1. Ensure Amplify Auth Recognizes Your Authenticated User #

When using custom login/register screens, you need to confirm Amplify’s Auth module knows the user has successfully authenticated. After your custom Auth.signIn() call succeeds, Amplify should automatically store the user session, but verifying this upfront avoids race conditions:

import { Auth } from 'aws-amplify';
import { useEffect } from 'react';

// In your Home screen component
useEffect(() => {
  const verifyAuthStatus = async () => {
    try {
      // Check if a valid authenticated session exists
      const user = await Auth.currentAuthenticatedUser();
      console.log('Authenticated user confirmed:', user.username);
      // Proceed with API call once auth is verified
      fetchYourData();
    } catch (error) {
      // No active session—redirect to login
      navigation.navigate('Login');
    }
  };

  verifyAuthStatus();
}, []);

2. Manually Attach Auth Headers to Your API Call #

The withAuthenticator HOC automatically injects authentication headers into API requests, but with custom auth, you’ll need to do this manually. Grab the user’s JWT token and pass it in the request headers:

const fetchYourData = async () => {
  try {
    // Retrieve the current user's JWT token
    const user = await Auth.currentAuthenticatedUser();
    const authToken = user.signInUserSession.idToken.jwtToken;

    // Make the API call with the required auth header
    const response = await API.get('YourAPIName', '/your-endpoint-path', {
      headers: {
        Authorization: authToken,
      },
    });

    console.log('API Response:', response);
  } catch (error) {
    console.error('API Call Error:', error);
  }
};

3. Double-Check Your Amplify Configuration #

Make sure your amplifyconfiguration.json (or manual Amplify.configure() setup) has the correct API Gateway settings, especially the authorization type:

Amplify.configure({
  API: {
    endpoints: [
      {
        name: 'YourAPIName',
        endpoint: 'https://your-api-id.execute-api.your-region.amazonaws.com/prod',
        region: 'your-region',
        authorizationType: 'AMAZON_COGNITO_USER_POOLS', // Critical for user pool auth
      },
    ],
  },
  // ... other Auth/Storage configs
});

4. Enable Debug Logs to Diagnose Further #

If you’re still stuck, turn on Amplify’s debug logging to see exactly what’s happening with your API request:

import { Amplify } from 'aws-amplify';

// Add this at the top of your app's entry file (e.g., App.js)
Amplify.Logger.LOG_LEVEL = 'DEBUG';

This will print detailed logs about the auth session, request headers, and API interactions—super helpful for spotting missing tokens or misconfigured endpoints.

5. Validate Your Custom Auth Flow #

Double-check that your custom login/register/confirmation flows are completing all necessary steps:

• After registration, ensure the user’s account is confirmed (either via email/SMS or admin confirmation)
• Make sure Auth.signIn() resolves successfully without errors
• Avoid race conditions where you’re making the API call before the auth session is fully stored

The key takeaway is that withAuthenticator handles auth context injection automatically, but with custom screens, you just need to explicitly pass the auth token and verify the user’s session before making API calls.

内容的提问来源于stack exchange，提问作者Ryan Seery