http.isValidHeaderValue(value, options?): boolean
Attributes
value:
anyoptions:
ObjecthttpValidation?:
stringValidation strictness, one of
'strict' or
'relaxed'. These have the same meaning as the httpValidation option of
http.createServer() and http.request(). Default: 'strict'.Returns:
booleanReturns true if value is a valid HTTP header value, and false otherwise.
With the default options this is the same check that
http.validateHeaderValue() performs, but the result is returned instead
of an error being thrown.
undefined and symbols are never valid header values. Other non-string
values are converted to strings before being checked, as they are when passed
to outgoingMessage.setHeader(name, value).
Passing an invalid options argument throws.
import { isValidHeaderValue } from 'node:http'; console.log(isValidHeaderValue('text/html')); // true console.log(isValidHeaderValue(123)); // true console.log(isValidHeaderValue(undefined)); // false console.log(isValidHeaderValue('a\r\nb')); // false console.log(isValidHeaderValue('a\x01b')); // false console.log(isValidHeaderValue('a\x01b', { httpValidation: 'relaxed' })); // true
const { isValidHeaderValue } = require('node:http'); console.log(isValidHeaderValue('text/html')); // true console.log(isValidHeaderValue(123)); // true console.log(isValidHeaderValue(undefined)); // false console.log(isValidHeaderValue('a\r\nb')); // false console.log(isValidHeaderValue('a\x01b')); // false console.log(isValidHeaderValue('a\x01b', { httpValidation: 'relaxed' })); // true