content-type.js — fastify Source File

Source Code

'use strict'

/**
 * keyValuePairsReg is used to split the parameters list into associated
 * key value pairings.
 *
 * @see https://httpwg.org/specs/rfc9110.html#parameter
 * @type {RegExp}
 */
const keyValuePairsReg = /([\w!#$%&'*+.^`|~-]+)=([^;]*)/gm

/**
 * typeNameReg is used to validate that the first part of the media-type
 * does not use disallowed characters.
 *
 * @see https://httpwg.org/specs/rfc9110.html#rule.token.separators
 * @type {RegExp}
 */
const typeNameReg = /^[\w!#$%&'*+.^`|~-]+$/

/**
 * subtypeNameReg is used to validate that the second part of the media-type
 * does not use disallowed characters.
 *
 * @see https://httpwg.org/specs/rfc9110.html#rule.token.separators
 * @type {RegExp}
 */
const subtypeNameReg = /^[\w!#$%&'*+.^`|~-]+\s*/

/**
 * ContentType parses and represents the value of the content-type header.
 *
 * @see https://httpwg.org/specs/rfc9110.html#media.type
 * @see https://httpwg.org/specs/rfc9110.html#parameter
 */
class ContentType {
  #valid = false
  #empty = true
  #type = ''
  #subtype = ''
  #parameters = new Map()
  #string

  constructor (headerValue) {
    if (headerValue == null || headerValue === '' || headerValue === 'undefined') {
      return
    }

    let sepIdx = headerValue.indexOf(';')
    if (sepIdx === -1) {
      // The value is the simplest `type/subtype` variant.
      sepIdx = headerValue.indexOf('/')
      if (sepIdx === -1) {
        // Got a string without the correct `type/subtype` format.
        return
      }

      const type = headerValue.slice(0, sepIdx).trimStart().toLowerCase()
      const subtype = headerValue.slice(sepIdx + 1).trimEnd().toLowerCase()

// ... (93 more lines)