twilio
Version:
A Twilio helper library
61 lines (60 loc) • 2.25 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const AuthStrategy_1 = __importDefault(require("./AuthStrategy"));
const jsonwebtoken_1 = __importDefault(require("jsonwebtoken"));
class TokenAuthStrategy extends AuthStrategy_1.default {
constructor(tokenManager) {
super("token");
this.token = "";
this.tokenManager = tokenManager;
}
async getAuthString() {
return this.fetchToken()
.then((token) => {
this.token = token;
return `Bearer ${this.token}`;
})
.catch((error) => {
throw new Error(`Failed to fetch access token: ${error.message}`);
});
}
requiresAuthentication() {
return true;
}
async fetchToken() {
if (this.token == null ||
this.token.length === 0 ||
this.isTokenExpired(this.token)) {
return this.tokenManager.fetchToken();
}
return Promise.resolve(this.token);
}
/**
* Function to check if the token is expired with a buffer of 30 seconds.
* @param token - The JWT token as a string.
* @returns Boolean indicating if the token is expired.
*/
isTokenExpired(token) {
try {
// Decode the token without verifying the signature, as we only want to read the expiration for this check
const decoded = jsonwebtoken_1.default.decode(token);
if (!decoded || !decoded.exp) {
// If the token doesn't have an expiration, consider it expired
return true;
}
const expiresAt = decoded.exp * 1000;
const bufferMilliseconds = 30 * 1000;
const bufferExpiresAt = expiresAt - bufferMilliseconds;
// Return true if the current time is after the expiration time with buffer
return Date.now() > bufferExpiresAt;
}
catch (error) {
// If there's an error decoding the token, consider it expired
return true;
}
}
}
exports.default = TokenAuthStrategy;