Download all Snapchat Memories (Node)

snapchat-memories.js

/*

1. Go to https://accounts.snapchat.com/ and request download of your data.
2. Download zip-file (when ready) and locate json/memories_history.json
3. Create a new folder with this script and the memories_history.json file
4. Install node-fetch; npm install node-fetch@^2.6.6 (using older version to avoid having to import as module)
5. Run the script.

Files will be prefixed with the date and a unique ID (from Snapchat) to avoid overwriting (see more details below).
This script was originally inspired by this StackOverflow question (but has since diverged greatly); https://stackoverflow.com/questions/61058637/snapchat-download-all-memories-at-once

Now go get those memories before the links expire ;) 

*/

const fetch = require('node-fetch');
const fs = require('fs');

// Folder to save all files in
const saveToFolder = './Memories';

// Helper-function to format numbers under 10 with leading zeros (helps with OCD). 
const getNumberWithLeadingZero = (number) => number > 9 ? number : `0${number}`;

// Stupidly create the date manually (look ma, no library!)
const getDate = (date, spacer = '-') => `${date.getFullYear()}${spacer}${getNumberWithLeadingZero(date.getMonth()+1)}${spacer}${getNumberWithLeadingZero(date.getDate())}${spacer}${getNumberWithLeadingZero(date.getHours())}${spacer}${getNumberWithLeadingZero(date.getMinutes())}`;

(async () => {

    // Create output folder if it doesn't exists
    if(!fs.existsSync(saveToFolder)) { fs.mkdirSync(saveToFolder)}

    // All memories resides within the "Saved Media" object at the time of writing. 
    const memories = JSON.parse(fs.readFileSync('memories_history.json'))['Saved Media'];

    for (const memory of memories){

        // Create a new Date object of the memory date.
        const fileDate = new Date(Date.parse(memory['Date']));

        // Make a request to get the actual media URL on AWS (slaps on required authentication etc)
        const fileDownloadURLRequest = await fetch(memory['Download Link'], { method: 'POST' });

        // The actual media URL - we'll parse the URL to be able to extract the unique filename. 
        // I did originally just use the date as filename, but if you've recorded multiple snaps at once (typically a video) they will all have the same timestamp and thus be overwritten until the last part .. 
        const fileDownloadUrl = new URL(await fileDownloadURLRequest.text());

        // Get the actual data file from AWS
        const fileContent = await fetch(fileDownloadUrl, { method: 'GET' });

        // Last part of the URL contains filename, so let's split the string and pop the last item in the array.
        const originalFileName = fileDownloadUrl.pathname.split('/').pop();
        
        // Use helper to get pretty date (makes sorting/archiving easier), and slap on unique ID to avoid overwriting.
        const newFileName = `${getDate(fileDate)}_${originalFileName}`;

        // Create new file with the correct file name in our desired folder
        const newFileStream = fs.createWriteStream(`${saveToFolder}/${newFileName}`);

        // Pipe contents into file
        fileContent.body.pipe(newFileStream);

        // Notify when file is saved
        newFileStream.on('finish', () => console.log(`💾 Saved ${newFileName}`));

        // Print out errors (might need to be further improved if you experience errors)
        newFileStream.on('error', (err) => console.error(err));
    }
})();