ferponse
472844e691
A long first message in ?prompt= exceeds Node's header limit. The chat GET returns 431 and Electron commits an empty window. Stash the text in sessionStorage and open /chat/<id>.
42 lines
1.5 KiB
TypeScript
42 lines
1.5 KiB
TypeScript
/**
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* The opening message rides beside the navigation, never in the URL.
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*
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* Home and the new-session draft used to push `/chat/<id>?prompt=<text>`.
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* Node's default max HTTP header size is 16KB. A long paste (a syllabus)
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* makes that GET return 431, and Electron commits an empty document: the
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* window stays the native background and looks frozen. The chat record
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* already exists, with an empty transcript, because POST /api/chats
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* succeeded first.
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*
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* sessionStorage holds the trimmed text under `lh.openingPrompt.<id>`.
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* The push target stays `/chat/<id>`. The chat page still honors a
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* `?prompt=` search param for an old link; when that param is absent it
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* reads this stash and sends it once. The stash survives until that send
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* resolves, so a reload before the POST lands can retry. Absent storage
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* (node tests, a thrown access) is a no-op — the short path still returns.
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*/
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const keyFor = (id: string) => `lh.openingPrompt.${id}`;
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function store(): Storage | null {
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try {
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if (typeof sessionStorage === "undefined" || sessionStorage == null) return null;
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return sessionStorage;
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} catch {
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return null;
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}
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}
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export function stashOpeningPrompt(id: string, text: string): void {
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store()?.setItem(keyFor(id), text);
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}
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export function readOpeningPrompt(id: string): string | undefined {
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const value = store()?.getItem(keyFor(id));
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return value && value.length > 0 ? value : undefined;
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}
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export function clearOpeningPrompt(id: string): void {
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store()?.removeItem(keyFor(id));
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}
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