@periskope/baileys
Version:
WhatsApp API
91 lines • 3.78 kB
JavaScript
import { prepareWAMessageMedia } from './messages.js';
import { extractImageThumb, getHttpStream, processImage } from './messages-media.js';
const THUMBNAIL_WIDTH_PX = 192;
/** Fetches an image and generates a thumbnail for it */
const getCompressedJpegThumbnail = async (url, { thumbnailWidth, fetchOpts }) => {
const stream = await getHttpStream(url, fetchOpts);
const result = await extractImageThumb(stream, thumbnailWidth);
return result;
};
/**
* Given a piece of text, checks for any URL present, generates link preview for the same and returns it
* Return undefined if the fetch failed or no URL was found
* @param text first matched URL in text
* @returns the URL info required to generate link preview
*/
export const getUrlInfo = async (text, opts = {
thumbnailWidth: THUMBNAIL_WIDTH_PX,
fetchOpts: { timeout: 3000 }
}) => {
try {
// retries
const retries = 0;
const maxRetry = 5;
const { getLinkPreview } = await import('link-preview-js');
let previewLink = text;
if (!text.startsWith('https://') && !text.startsWith('http://')) {
previewLink = 'https://' + previewLink;
}
const info = await getLinkPreview(previewLink, {
...opts.fetchOpts,
followRedirects: 'follow',
handleRedirects: (baseURL, forwardedURL) => {
const urlObj = new URL(baseURL);
const forwardedURLObj = new URL(forwardedURL);
if (retries >= maxRetry) {
return false;
}
if (forwardedURLObj.hostname === urlObj.hostname ||
forwardedURLObj.hostname === 'www.' + urlObj.hostname ||
'www.' + forwardedURLObj.hostname === urlObj.hostname) {
retries + 1;
return true;
}
else {
return false;
}
},
headers: {
...(opts.fetchOpts.headers || {}),
'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36'
}
});
if (info && 'title' in info && info.title) {
const [image] = info.images;
const urlInfo = {
'canonical-url': info.url,
'matched-text': text,
title: info.title,
description: info.description,
originalThumbnailUrl: image
};
if (opts.uploadImage && image) {
const imageBuffer = await processImage(image);
if (imageBuffer) {
const { imageMessage } = await prepareWAMessageMedia({ image: imageBuffer }, {
upload: opts.uploadImage,
mediaTypeOverride: 'thumbnail-link',
options: opts.fetchOpts
});
urlInfo.jpegThumbnail = imageMessage?.jpegThumbnail ? Buffer.from(imageMessage.jpegThumbnail) : undefined;
urlInfo.highQualityThumbnail = imageMessage || undefined;
}
}
else {
try {
urlInfo.jpegThumbnail = image ? (await getCompressedJpegThumbnail(image, opts)).buffer : undefined;
}
catch (error) {
opts.logger?.debug({ err: error.stack, url: previewLink }, 'error in generating thumbnail');
}
}
return urlInfo;
}
}
catch (error) {
if (!error.message.includes('receive a valid')) {
throw error;
}
}
};
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