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Transcode link preview images

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Fedor Indutny 2022-04-25 13:56:59 -07:00 • committed by GitHub
parent fd610a6300
commit 40f16b98e2
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2 changed files with 33 additions and 18 deletions
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17
ts/linkPreviews/linkPreviewFetch.ts
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@ -3,6 +3,7 @@
import type { RequestInit, Response } from 'node-fetch';
import type { AbortSignal as AbortSignalForNodeFetch } from 'abort-controller';
import { blobToArrayBuffer } from 'blob-util';
import type { MIMEType } from '../types/MIME';
import {
@ -14,6 +15,7 @@ import {
stringToMIMEType,
} from '../types/MIME';
import type { LoggerType } from '../types/Logging';
import { scaleImageToLevel } from '../util/scaleImageToLevel';
import * as log from '../logging/log';
const USER_AGENT = 'WhatsApp/2';
@ -603,5 +605,20 @@ export async function fetchLinkPreviewImage(
return null;
}
// Scale link preview image
if (contentType !== IMAGE_GIF) {
const dataBlob = new Blob([data], {
type: contentType,
});
const { blob: xcodedDataBlob } = await scaleImageToLevel(
dataBlob,
contentType,
false
);
const xcodedDataArrayBuffer = await blobToArrayBuffer(xcodedDataBlob);
data = new Uint8Array(xcodedDataArrayBuffer);
}
return { data, contentType };
}