@revoloo/cypress6/packages/server/lib/util/escape_filename.ts

Cypress.io end to end testing tool

const ampersandRe = /&/g
const percentRe = /%/g
const questionRe = /\?/g
const plusRe = /\+/g

export function escapeFilenameInUrl (url: string) {
  // escape valid file name characters that cannot be used in URL
  return url
  .replace(percentRe, '%25') // %
  .replace(ampersandRe, '%26') // &
  .replace(questionRe, '%3F') // ? -> it's only valid in Linux
  .replace(plusRe, '%2B') // + https://github.com/cypress-io/cypress/issues/5909
}