How to get the logged in user in the application

[nagendrakumar02]

How can we help?

I am currently using cognito@edge and attached it to the CDN. How can I retrieve the userId who has logged into the application?

[unitypark]

all retrieved information are saved in the cookie. one of them has a value of userId which has .LastAuthUser as suffix in key

[nagendrakumar02]

Thanks!

From: Junghwa Theodore Park @.> Date: Saturday, April 15, 2023 at 2:01 PM To: awslabs/cognito-at-edge @.> Cc: nagendrakumar02 @.>, Author @.> Subject: Re: [awslabs/cognito-at-edge] How to get the logged in user in the application (Issue #62)

all retrieved information are saved in the cookie. one of them has a value of userId.

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[67726e]

At a high-level, this is the flow of the code in the application at-present.

this._cookieBase = `CognitoIdentityServiceProvider.${params.userPoolAppId}`;

_buildCookieAccessTokenKey = (username: string) => `${this._cookieBase}.${username}.accessToken`;
_buildCookieIDTokenKey = (username: string) => `${this._cookieBase}.${username}.idToken`;
_buildCookieRefreshTokenKey = (username: string) => `${this._cookieBase}.${username}.refreshToken`;
_buildCookieScopeKey = (username: string) => `${this._cookieBase}.${username}.tokenScopesString`;
_buildCookieUsernameKey = () => `${this._cookieBase}.LastAuthUser`;

// Assumed that `cookieHeaders[string] => { key: string, value: string, };`
// Bearing in mind that the cookies may not actually exist :)
const cookieUsername = cookieHeaders[this._buildCookieUsernameKey()];
const cookieAccessToken = cookieHeaders[this._buildCookieAccessTokenKey(cookieUsername?.value)];
const cookieIDToken = cookieHeaders[this._buildCookieIDTokenKey(cookieUsername?.value)];
const cookieRefreshToken = cookieHeaders[this._buildCookieRefreshTokenKey(cookieUsername?.value)];

const tokens: Tokens = {
  accessToken: cookieAccessToken.value,
  idToken: cookieIDToken.value,
  refreshToken: cookieRefreshToken.value,
};