@pepperi/ngx-lib
Version:
Pepperi Angular Components and Services
109 lines • 14 kB
JavaScript
import { Injectable } from '@angular/core';
import * as i0 from "@angular/core";
export class JwtHelperService {
constructor() {
}
urlBase64Decode(str) {
let output = str.replace(/-/g, '+').replace(/_/g, '/');
switch (output.length % 4) {
case 0: {
break;
}
case 2: {
output += '==';
break;
}
case 3: {
output += '=';
break;
}
default: {
throw new Error('Illegal base64url string!');
}
}
return this.b64DecodeUnicode(output);
}
// credits for decoder goes to https://github.com/atk
b64decode(str) {
const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
let output = '';
str = String(str).replace(/=+$/, '');
if (str.length % 4 === 1) {
throw new Error('\'atob\' failed: The string to be decoded is not correctly encoded.');
}
for (
// initialize result and counters
let bc = 0, bs, buffer, idx = 0;
// get next character
(buffer = str.charAt(idx++));
// character found in table? initialize bit storage and add its ascii value;
~buffer &&
((bs = bc % 4 ? bs * 64 + buffer : buffer),
// and if not first of each 4 characters,
// convert the first 8 bits to one ascii character
bc++ % 4)
? (output += String.fromCharCode(255 & (bs >> ((-2 * bc) & 6))))
: 0) {
// try to find character in table (0-63, not found => -1)
buffer = chars.indexOf(buffer);
}
return output;
}
b64DecodeUnicode(str) {
return decodeURIComponent(Array.prototype.map
.call(this.b64decode(str), (c) => {
return '%' + ('00' + c.charCodeAt(0).toString(16)).slice(-2);
})
.join(''));
}
decodeToken(token) {
if (!token || token === '') {
return null;
}
const parts = token.split('.');
if (parts.length !== 3) {
throw new Error('The inspected token doesn\'t appear to be a JWT. Check to make sure it has three parts and see https://jwt.io for more.');
}
const decoded = this.urlBase64Decode(parts[1]);
if (!decoded) {
throw new Error('Cannot decode the token.');
}
return JSON.parse(decoded);
}
getTokenExpirationDate(token) {
let decoded;
decoded = this.decodeToken(token);
if (!decoded || !decoded.hasOwnProperty('exp')) {
return null;
}
const date = new Date(0);
date.setUTCSeconds(decoded.exp);
return date;
}
isTokenExpired(token, offsetSeconds) {
if (!token || token === '') {
return true;
}
const date = this.getTokenExpirationDate(token);
offsetSeconds = offsetSeconds || 0;
if (date === null) {
return false;
}
return !(date.valueOf() > new Date().valueOf() + offsetSeconds * 1000);
}
getAuthScheme(authScheme, request) {
if (typeof authScheme === 'function') {
return authScheme(request);
}
return authScheme;
}
}
JwtHelperService.ɵfac = function JwtHelperService_Factory(t) { return new (t || JwtHelperService)(); };
JwtHelperService.ɵprov = i0.ɵɵdefineInjectable({ token: JwtHelperService, factory: JwtHelperService.ɵfac, providedIn: 'root' });
/*@__PURE__*/ (function () { i0.ɵsetClassMetadata(JwtHelperService, [{
type: Injectable,
args: [{
providedIn: 'root',
}]
}], function () { return []; }, null); })();
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initialize bit storage and add its ascii value;\r\n        ~buffer &&\r\n        ((bs = bc % 4 ? bs * 64 + buffer : buffer),\r\n        // and if not first of each 4 characters,\r\n        // convert the first 8 bits to one ascii character\r\n        bc++ % 4)\r\n            ? (output += String.fromCharCode(255 & (bs >> ((-2 * bc) & 6))))\r\n            : 0\r\n        ) {\r\n            // try to find character in table (0-63, not found => -1)\r\n            buffer = chars.indexOf(buffer);\r\n        }\r\n        return output;\r\n    }\r\n\r\n    private b64DecodeUnicode(str: any): string {\r\n        return decodeURIComponent(\r\n        Array.prototype.map\r\n            .call(this.b64decode(str), (c: any) => {\r\n                return '%' + ('00' + c.charCodeAt(0).toString(16)).slice(-2);\r\n            })\r\n            .join('')\r\n        );\r\n    }\r\n\r\n    public decodeToken(token: string): any {\r\n        if (!token || token === '') {\r\n            return null;\r\n        }\r\n\r\n        const parts = token.split('.');\r\n\r\n        if (parts.length !== 3) {\r\n            throw new Error(\r\n                'The inspected token doesn\\'t appear to be a JWT. Check to make sure it has three parts and see https://jwt.io for more.'\r\n            );\r\n        }\r\n\r\n        const decoded = this.urlBase64Decode(parts[1]);\r\n        if (!decoded) {\r\n            throw new Error('Cannot decode the token.');\r\n        }\r\n\r\n        return JSON.parse(decoded);\r\n    }\r\n\r\n    public getTokenExpirationDate(token: string): Date | null {\r\n        let decoded: any;\r\n        decoded = this.decodeToken(token);\r\n\r\n        if (!decoded || !decoded.hasOwnProperty('exp')) {\r\n            return null;\r\n        }\r\n\r\n        const date = new Date(0);\r\n        date.setUTCSeconds(decoded.exp);\r\n\r\n        return date;\r\n    }\r\n\r\n    public isTokenExpired(token: string, offsetSeconds?: number): boolean {\r\n        if (!token || token === '') {\r\n            return true;\r\n        }\r\n        const date = this.getTokenExpirationDate(token);\r\n        offsetSeconds = offsetSeconds || 0;\r\n\r\n        if (date === null) {\r\n            return false;\r\n        }\r\n\r\n        return !(date.valueOf() > new Date().valueOf() + offsetSeconds * 1000);\r\n    }\r\n\r\n    public getAuthScheme(authScheme: Function | string | undefined, request: HttpRequest<any>): string {\r\n        if (typeof authScheme === 'function') {\r\n            return authScheme(request);\r\n        }\r\n\r\n        return authScheme;\r\n    }\r\n}"]}