hi,
I have some quite old user agent Mozilla/5.0 (QtEmbedded; Linux) AppleWebKit/534.34 (KHTML, like Gecko) webkit/0.1 Safari/534.34 (some proprietary set-top box) which seem to include line feed between cookies when the server sends multiple Set-Cookie headers. I know that the new spec is that the user agent should join these headers with a comma , but it seems like before this was \n.
line feeds are deprecated but still allowed per https://tools.ietf.org/html/rfc7230.
if I change the regex for splitting the headers returned by xhr.getAllResponseHeaders() from /\r?\n/ to /\r\n/ the problem is solved for this user agent https://github.com/github/fetch/blob/eebaa2a1bc21eeba98ee00c9f94a0a4c2007cff1/fetch.js#L361.
from the specs it seems headers should always be delimited by \r\n so I wonder if this is the proper fix for my user agent.
without the fix, my requests to the server fail while using credentials: 'same-origin' because cookies are not send like they were received from the server.