@platformatic/kafka/dist/protocol/sasl/credential-provider.js

Modern and performant client for Apache Kafka

import { AuthenticationError } from "../../errors.js";
export function getCredential(label, credentialOrProvider, callback) {
    if (typeof credentialOrProvider === 'string') {
        callback(null, credentialOrProvider);
        return;
    }
    else if (typeof credentialOrProvider !== 'function') {
        callback(new AuthenticationError(`The ${label} should be a string or a function.`), undefined);
        return;
    }
    try {
        const credential = credentialOrProvider();
        if (typeof credential === 'string') {
            callback(null, credential);
            return;
        }
        else if (typeof credential?.then !== 'function') {
            callback(new AuthenticationError(`The ${label} provider should return a string or a promise that resolves to a string.`), undefined);
            return;
        }
        credential
            .then(token => {
            if (typeof token !== 'string') {
                process.nextTick(callback, new AuthenticationError(`The ${label} provider should resolve to a string.`), undefined);
                return;
            }
            process.nextTick(callback, null, token);
        })
            .catch(error => {
            process.nextTick(callback, new AuthenticationError(`The ${label} provider threw an error.`, { cause: error }));
        });
    }
    catch (error) {
        callback(new AuthenticationError(`The ${label} provider threw an error.`, { cause: error }), undefined);
    }
}