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acd41eb0be
* Declare return types on functions And a very few other type related minor fixes * Minor syntax fixes * Remove unnecessary escape chars in regexes * Remove unnecessary awaits * Replace deprecated req.connection with req.socket * Replace deprecated upload with uploadOne * Remove unnecessary eslint-disable-next-line comments * Comment empty functions / catch or finally clauses * Fix irregular whitespaces * Add missing returns (null) * Remove unreachable code * A few logical fixes * Remove / Handle non-null assertions which are certainly unnecessary (e.g. in tests)
33 lines
643 B
TypeScript
33 lines
643 B
TypeScript
import atob from 'atob';
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import logger from '../logger';
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/**
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* Check if a given string conforms to the structure of a JWT.
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*/
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export default function isJWT(string: string): boolean {
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const parts = string.split('.');
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// JWTs have the structure header.payload.signature
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if (parts.length !== 3) return false;
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// Check if all segments are base64 encoded
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try {
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atob(parts[0]);
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atob(parts[1]);
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atob(parts[2]);
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} catch (err) {
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logger.error(err);
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return false;
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}
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// Check if the header and payload are valid JSON
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try {
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JSON.parse(atob(parts[0]));
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JSON.parse(atob(parts[1]));
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} catch {
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return false;
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}
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return true;
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}
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