signal-desktop/ts/util/downloadAttachment.ts
2021-10-26 14:15:33 -05:00

41 lines
1,000 B
TypeScript

// Copyright 2020 Signal Messenger, LLC
// SPDX-License-Identifier: AGPL-3.0-only
import type {
AttachmentType,
DownloadedAttachmentType,
} from '../types/Attachment';
import { downloadAttachment as doDownloadAttachment } from '../textsecure/downloadAttachment';
export async function downloadAttachment(
attachmentData: AttachmentType
): Promise<DownloadedAttachmentType | null> {
let migratedAttachment: AttachmentType;
const { id: legacyId } = attachmentData;
if (legacyId === undefined) {
migratedAttachment = attachmentData;
} else {
migratedAttachment = {
...attachmentData,
cdnId: String(legacyId),
};
}
let downloaded;
try {
downloaded = await doDownloadAttachment(
window.textsecure.server,
migratedAttachment
);
} catch (error) {
// Attachments on the server expire after 30 days, then start returning 404
if (error && error.code === 404) {
return null;
}
throw error;
}
return downloaded;
}