14 replies

Multiple Set-Cookie headers folded into one header

In the documentation (https://developers.cloudflare.com/workers/runtime-apis/headers/), it says that "the Headers.append method will allow you to set multiple Set-Cookie response headers instead of appending the value onto the existing header."

However, the following code produces a single concatenated

Set-Cookie

Set-Cookie

header when sent to the client:

const headers = new Headers();

const headers = new Headers();

headers.append('Set-Cookie', 'cookie1=1;');

headers.append('Set-Cookie', 'cookie1=1;');

headers.append('Set-Cookie', 'cookie2=2;');

headers.append('Set-Cookie', 'cookie2=2;');

return new Response(null, headers);

return new Response(null, headers);

getAll

getAll

works properly in the Workers environment, but

entries

entries

shows only a single

Set-Cookie

Set-Cookie

header. On the client, only a single header, like so:

Set-Cookie: cookie1=1;, cookie2=2;

Set-Cookie: cookie1=1;, cookie2=2;

This behavior breaks from spec and the docs and prevents me from setting multiple cookies on a single request. Browsers do not properly interpret a single

Set-Cookie

Set-Cookie

header.

Is this a bug? Or am I missing something? How can I have multiple

Set-Cookie

Set-Cookie

headers on my response?

Multiple Set-Cookie headers folded into one header

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Multiple Set-Cookie headers folded into one header

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