aws-cdk
Version:
AWS CDK CLI, the command line tool for CDK apps
24 lines • 3.16 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.makeCachingProvider = makeCachingProvider;
exports.credentialsAboutToExpire = credentialsAboutToExpire;
const property_provider_1 = require("@smithy/property-provider");
/**
* Wrap a credential provider in a cache
*
* Some credential providers in the SDKv3 are cached (the default Node
* chain, specifically) but most others are not.
*
* Since we want to avoid duplicate calls to `AssumeRole`, or duplicate
* MFA prompts or what have you, we are going to liberally wrap providers
* in caches which will return the cached value until it expires.
*/
function makeCachingProvider(provider) {
return (0, property_provider_1.memoize)(provider, credentialsAboutToExpire, (token) => !!token.expiration);
}
function credentialsAboutToExpire(token) {
const expiryMarginSecs = 5;
// token.expiration is sometimes null
return !!token.expiration && token.expiration.getTime() - Date.now() < expiryMarginSecs * 1000;
}
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