Function normalizeIncomingMethod

src/request.ts:169–197

(method: unknown)

const methodTokenRegExp = /^[!#$%&'*+\-.^_`|~0-9A-Za-z]+$/

const normalizeIncomingMethod = (method: unknown): string => {
  if (typeof method !== 'string' || method.length === 0) {
    return 'GET'
  }

  // fast path for already-uppercase common methods from Node.js.
  switch (method) {
    case 'DELETE':
    case 'GET':
    case 'HEAD':
    case 'OPTIONS':
    case 'POST':
    case 'PUT':
      return method
  }

  const upper = method.toUpperCase()
  switch (upper) {
    case 'DELETE':
    case 'GET':
    case 'HEAD':
    case 'OPTIONS':
    case 'POST':
    case 'PUT':
      return upper
    default:
      return method
  }
}

const validateDirectReadMethod = (method: string): TypeError | undefined => {
  if (!methodTokenRegExp.test(method)) {