Function createUpstreamResponseHeaders

packages/dev-proxy/src/server.ts:144–172

(
  response: Response,
  targetUrl: URL,
  requestOrigin: string | undefined | null,
  allowedOrigins: DevProxyCorsAllowedOrigins,
  cookieRewrite: CookieRewriteOptions | false | undefined,
)

}

const createUpstreamResponseHeaders = (
  response: Response,
  targetUrl: URL,
  requestOrigin: string | undefined | null,
  allowedOrigins: DevProxyCorsAllowedOrigins,
  cookieRewrite: CookieRewriteOptions | false | undefined,
) => {
  const headers = new Headers(response.headers)
  RESPONSE_HEADERS_TO_DROP.forEach(header => headers.delete(header))
  headers.delete('set-cookie')

  const localScopeKey = cookieRewrite
    ? resolveCookieRewriteLocalScopeKey(cookieRewrite, targetUrl)
    : undefined
  const setCookieHeaders = getSetCookieHeaders(response.headers)
  const responseSetCookieHeaders = cookieRewrite
    ? rewriteSetCookieHeadersForLocal(setCookieHeaders, {
        ...cookieRewrite,
        localScopeKey,
      })
    : setCookieHeaders

  responseSetCookieHeaders.forEach((cookie) => {
    headers.append('set-cookie', cookie)
  })

  applyCorsHeaders(headers, requestOrigin, allowedOrigins)
  return headers
}

const proxyRequest = async (
  context: Context,