Function contentLengthHeader

packages/effect/src/unstable/http/HttpMiddleware.ts:559–566

(headers: Headers.Headers)

const noTransformRegex = /(?:^|[\s,])no-transform(?:$|[\s,;])/i

const contentLengthHeader = (headers: Headers.Headers): number | undefined => {
  const value = headers["content-length"]
  if (value === undefined) {
    return undefined
  }
  const parsed = Number(value)
  return Number.isFinite(parsed) && parsed >= 0 ? parsed : undefined
}