68 lines
2.0 KiB
TypeScript
68 lines
2.0 KiB
TypeScript
function unwrapCause(err: unknown): unknown {
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if (!err || typeof err !== "object") return null;
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const cause = (err as { cause?: unknown }).cause;
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return cause ?? null;
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}
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function enhanceBrowserFetchError(
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url: string,
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err: unknown,
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timeoutMs: number,
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): Error {
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const cause = unwrapCause(err);
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const code =
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(cause && typeof cause === "object" && "code" in cause
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? String((cause as { code?: unknown }).code ?? "")
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: "") ||
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(err && typeof err === "object" && "code" in err
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? String((err as { code?: unknown }).code ?? "")
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: "");
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const hint =
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"Start (or restart) the Clawdis gateway (Clawdis.app menubar, or `clawdis gateway`) and try again.";
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if (code === "ECONNREFUSED") {
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return new Error(
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`Can't reach the clawd browser control server at ${url} (connection refused). ${hint}`,
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);
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}
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if (code === "ETIMEDOUT" || code === "UND_ERR_CONNECT_TIMEOUT") {
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return new Error(
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`Can't reach the clawd browser control server at ${url} (timed out after ${timeoutMs}ms). ${hint}`,
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);
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}
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const msg = String(err);
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if (msg.toLowerCase().includes("abort")) {
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return new Error(
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`Can't reach the clawd browser control server at ${url} (timed out after ${timeoutMs}ms). ${hint}`,
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);
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}
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return new Error(
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`Can't reach the clawd browser control server at ${url}. ${hint} (${msg})`,
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);
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}
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export async function fetchBrowserJson<T>(
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url: string,
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init?: RequestInit & { timeoutMs?: number },
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): Promise<T> {
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const timeoutMs = init?.timeoutMs ?? 5000;
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const ctrl = new AbortController();
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const t = setTimeout(() => ctrl.abort(), timeoutMs);
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let res: Response;
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try {
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res = await fetch(url, { ...init, signal: ctrl.signal } as RequestInit);
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} catch (err) {
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throw enhanceBrowserFetchError(url, err, timeoutMs);
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} finally {
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clearTimeout(t);
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}
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if (!res.ok) {
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const text = await res.text().catch(() => "");
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throw new Error(text ? `${res.status}: ${text}` : `HTTP ${res.status}`);
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}
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return (await res.json()) as T;
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}
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