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