64 lines
1.9 KiB
TypeScript
64 lines
1.9 KiB
TypeScript
import config from "./config.ts";
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import { requestLog, sleep } from "./util.ts";
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export async function sendWebhook(
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id: string,
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token: string,
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headers: Headers,
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data: Record<string, any>,
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): Promise<[Response, Record<string, string>]> {
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const reqLog = requestLog(headers);
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const url = `https://discord.com/api/webhooks/${id}/${token}/github?wait=1`;
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const body = JSON.stringify(data);
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let res: Response;
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let retries = 0;
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do {
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const req = new Request(url, {
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method: "POST",
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headers: headers,
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body: body,
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});
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reqLog.info(`sending webhook request to ${url}`);
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res = await fetch(req);
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// return response if everything's fine
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if (res.status !== 429) break;
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const reset = res.headers.get("retry-after");
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// should always exist, even for cf bans, but checking anyway
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if (reset === null) break;
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// parse retry delay
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let resetms = parseFloat(reset);
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if (!res.headers.has("via")) {
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// if there's no `via` header, this is likely a cf ban, which uses seconds instead of milliseconds
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resetms *= 1000;
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}
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// if we'd wait longer than the configured limit, just return the 429
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if (resetms > config.maxWebhookRetryMs) {
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reqLog.warn(
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`ratelimited for ${resetms}ms (> ${config.maxWebhookRetryMs}ms), not retrying`,
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);
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break;
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}
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// maybe wait and retry
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if (retries >= config.maxWebhookRetries) {
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reqLog.warn(`reached maximum number of retries (${retries})`);
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break;
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}
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retries++;
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reqLog.warn(`retrying after ${resetms}ms (retry ${retries})`);
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await sleep(resetms);
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} while (true);
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// set metadata
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const meta: Record<string, string> = {};
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if (retries) meta["retries"] = retries.toString();
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return [res, meta];
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}
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