mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-10-30 07:14:39 +08:00
Malte UblandClaude Opus 5.5
77b137268d
Fetch's "sort and combine" never combines Set-Cookie: Node's Headers iterator yields one entry per Set-Cookie value, in insertion order, while get() still joins them with ", ". The native forEach walked the sorted unique names and read the combined value, so repeated cookies reached the callback as one joined string. forEach now indexes the expanded list per step (sf_headers_sorted_entry), keeping the live re-sort so callback mutations shift later entries as in Node. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
64 lines
2.1 KiB
TypeScript
64 lines
2.1 KiB
TypeScript
// Headers iteration follows Fetch's "sort and combine": names in byte
|
|
// order with their combined values, except that every Set-Cookie value is
|
|
// visited on its own. get() still joins them; getSetCookie() lists them.
|
|
const h = new Headers();
|
|
h.append("set-cookie", "a=1; Path=/");
|
|
h.append("x-b", "1");
|
|
h.append("Set-Cookie", "b=2, c=3");
|
|
h.append("x-a", "1");
|
|
h.append("x-a", "2");
|
|
h.append("set-cookie", "d=4");
|
|
h.forEach((value, name) => console.log(`${name}: ${value}`));
|
|
console.log(JSON.stringify(h.get("set-cookie")));
|
|
console.log(JSON.stringify(h.getSetCookie()));
|
|
|
|
// A thisArg and the Headers object reach the callback.
|
|
const self = { tag: "this" };
|
|
h.forEach(function (this: typeof self, _value, name, headers) {
|
|
if (name === "x-b") console.log(this.tag, headers === h);
|
|
}, self);
|
|
|
|
// Iteration is live and indexes the expanded list: deleting the cookies
|
|
// while visiting the first one shifts the next name into its slot.
|
|
const live = new Headers();
|
|
live.append("set-cookie", "a=1");
|
|
live.append("set-cookie", "b=2");
|
|
live.append("x-z", "z");
|
|
const seen: string[] = [];
|
|
live.forEach((value, name) => {
|
|
seen.push(`${name}=${value}`);
|
|
if (value === "a=1") live.delete("set-cookie");
|
|
});
|
|
console.log(seen.join(" | "));
|
|
|
|
// Appending a cookie during the walk is visited when it sorts later.
|
|
const grow = new Headers();
|
|
grow.append("set-cookie", "a=1");
|
|
grow.append("x-y", "y");
|
|
const grown: string[] = [];
|
|
grow.forEach((value, name) => {
|
|
grown.push(`${name}=${value}`);
|
|
if (value === "a=1") grow.append("set-cookie", "b=2");
|
|
});
|
|
console.log(grown.join(" | "));
|
|
|
|
// Only set-cookie stays separate; cookie and other repeats combine.
|
|
const plain = new Headers([
|
|
["cookie", "a=1"],
|
|
["cookie", "b=2"],
|
|
["accept", "x"],
|
|
["accept", "y"],
|
|
]);
|
|
plain.forEach((value, name) => console.log(`${name}: ${value}`));
|
|
console.log(JSON.stringify(plain.getSetCookie()));
|
|
|
|
// A response's headers walk the same way.
|
|
const response = new Response("ok", {
|
|
headers: [
|
|
["set-cookie", "s=1"],
|
|
["set-cookie", "t=2"],
|
|
["content-type", "text/plain"],
|
|
],
|
|
});
|
|
response.headers.forEach((value, name) => console.log(`${name}: ${value}`));
|