Resolving HTTP 302 Errors

An HTTP 302 status code indicates redirection, often caused by:

• Authentication requirements.
• Backend misconfigurations.

Quick Fixes

1. Check Backend Logic: Ensure no unintended redirection occurs.
2. Add Authentication Headers:

   const response = await axios.get(
     `http://localhost:8080/api/product/${id}`,
     { headers: { Authorization: `Bearer ${token}` } }
   );

1. Debug with Tools: Use Postman to inspect backend responses.

Backend Adjustment

Return the correct status code in the controller:

@GetMapping("/product/{id}")
public ResponseEntity<Product> getProductById(@PathVariable int id) {
    Product product = service.getProductById(id);
    return product != null
        ? new ResponseEntity<>(product, HttpStatus.OK)
        : new ResponseEntity<>(HttpStatus.NOT_FOUND);
}

By addressing these issues, you can eliminate unexpected redirections and ensure proper API responses.