Top method for preventing an HTTP 403 error when receiving the Set-Cookie header in order to establish the CSRF Cookie

Question

Top method for preventing an HTTP 403 error when receiving the Set-Cookie header in order to establish the CSRF Cookie

As I interact with a REST API that includes CSRF protection measures, I am facing a common hurdle.

Successfully obtaining the token and sending it back to the server seems to work smoothly.

However, encountering an HTTP 403 error arises when initiating the very first request or in scenarios where the CSRF Cookie is unestablished in the browser.

This issue stems from failing to transmit the CSRF token during the initial request, especially as the server triggers the Set-Cookie header configuration to define the CSRF Cookie.

To circumvent this error for the inaugural request made to a CSRF-protected API, what strategies should be employed?

Is it advisable to consistently verify if the CSRF Cookie is present in the browser prior to initiating any subsequent requests?

javascript cookies fetch-api x-xsrf-token

Answer 1

Answer №1

If you ever need to verify user authentication, you can utilize a setup similar to this one. Please keep in mind that this example consists of placeholder code.

checkIfAuthenticated()
.then( token => {
  // User has been authenticated. Access token
})
.catch( err => {
  // Uh-oh. User is not authorized. Proceed with user authentication.
});

// Implement your checkifAuthenticated function below:

function checkifAuthenticated() {
  return new Promise((resovle, reject) => {
    // Make an HTTP request to /api?checkauth here
    if(api_returned_401) {
      reject('not authenticated');
    } else {
      resolve(tokenOrInfo);
    }
  });
}

Answer 2

If you ever need to verify user authentication, you can utilize a setup similar to this one. Please keep in mind that this example consists of placeholder code.

checkIfAuthenticated()
.then( token => {
  // User has been authenticated. Access token
})
.catch( err => {
  // Uh-oh. User is not authorized. Proceed with user authentication.
});

// Implement your checkifAuthenticated function below:

function checkifAuthenticated() {
  return new Promise((resovle, reject) => {
    // Make an HTTP request to /api?checkauth here
    if(api_returned_401) {
      reject('not authenticated');
    } else {
      resolve(tokenOrInfo);
    }
  });
}

Top method for preventing an HTTP 403 error when receiving the Set-Cookie header in order to establish the CSRF Cookie

Answer №1

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