61 lines
2.1 KiB
TypeScript
61 lines
2.1 KiB
TypeScript
import { ensureApiGatewayReady, invalidateApiGatewayReady } from '@/lib/api';
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const GATEWAY_RETRY_STATUS = new Set([502, 503, 504]);
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const MEDIA_FETCH_MAX_ATTEMPTS = 8;
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const MEDIA_SLOW_LOAD_WARN_MS = 8_000;
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function sleep(ms: number): Promise<void> {
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return new Promise((resolve) => setTimeout(resolve, ms));
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}
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function warnSlowMediaLoad(label: string, startedAt: number, error: unknown) {
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if (Date.now() - startedAt < MEDIA_SLOW_LOAD_WARN_MS) return;
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const detail = error instanceof Error ? error.message : 'неизвестная ошибка';
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console.warn(`[media] ${label}: не удалось загрузить за ${Math.round((Date.now() - startedAt) / 1000)} с (${detail})`);
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}
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export async function fetchMediaBlobWithRetry(
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accessUrl: string,
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token: string,
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options?: { mimeType?: string; label?: string }
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): Promise<Blob> {
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const startedAt = Date.now();
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const label = options?.label ?? 'изображение';
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let lastError: unknown;
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for (let attempt = 0; attempt < MEDIA_FETCH_MAX_ATTEMPTS; attempt += 1) {
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try {
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await ensureApiGatewayReady();
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const response = await fetch(accessUrl, {
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headers: { Authorization: `Bearer ${token}` },
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cache: 'no-store'
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});
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if (GATEWAY_RETRY_STATUS.has(response.status) && attempt + 1 < MEDIA_FETCH_MAX_ATTEMPTS) {
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invalidateApiGatewayReady();
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await sleep(350 * (attempt + 1));
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continue;
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}
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if (!response.ok) {
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throw new Error(`HTTP ${response.status}`);
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}
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const raw = await response.blob();
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const mimeType = options?.mimeType;
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if (mimeType && (!raw.type || raw.type === 'application/octet-stream')) {
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return new Blob([await raw.arrayBuffer()], { type: mimeType });
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}
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return raw;
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} catch (error) {
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lastError = error;
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if (attempt + 1 < MEDIA_FETCH_MAX_ATTEMPTS) {
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await sleep(350 * (attempt + 1));
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}
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}
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}
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warnSlowMediaLoad(label, startedAt, lastError);
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throw lastError instanceof Error ? lastError : new Error('Не удалось загрузить файл');
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}
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