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ass/storage.js

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// https://docs.digitalocean.com/products/spaces/resources/s3-sdk-examples/
// https://www.digitalocean.com/community/tutorials/how-to-upload-a-file-to-object-storage-with-node-js
const fs = require('fs-extra');
const aws = require('aws-sdk');
const multer = require('multer');
const multerS3 = require('multer-s3');
const { getSafeExt } = require('./utils');
const { diskFilePath, saveWithDate, s3enabled, s3endpoint, s3bucket, s3accessKey, s3secretKey } = require('./config.json');
const s3 = new aws.S3({
endpoint: new aws.Endpoint(s3endpoint),
credentials: new aws.Credentials({ accessKeyId: s3accessKey, secretAccessKey: s3secretKey })
});
const uploadS3 = multer({
storage: multerS3({
s3: s3,
bucket: s3bucket,
acl: 'public-read',
key: (req, file, cb) => cb(null, req.randomId.concat(getSafeExt(file.mimetype))),
contentType: (_req, file, cb) => cb(null, file.mimetype)
})
}).single('file');
const deleteS3 = (file) =>
new Promise((resolve, reject) =>
s3.deleteObject({ Bucket: s3bucket, Key: file.randomId.concat(getSafeExt(file.mimetype)) }).promise().then(resolve).catch(reject));
const uploadLocal = multer({
storage: multer.diskStorage({
destination: !saveWithDate ? diskFilePath : (_req, _file, cb) => {
// Get current month and year
let [month, _day, year] = new Date().toLocaleDateString("en-US").split("/");
// Add 0 before single digit months eg ( 6 turns into 06)
let folder = `${diskFilePath}/${year}-${("0" + month).slice(-2)}`;
// Create folder if it doesn't exist
fs.ensureDirSync(folder);
cb(null, folder);
}
})
}).single('file');
const bucketSize = () =>
new Promise((resolve, reject) => s3enabled ? listAllKeys(resolve, reject) : resolve(0));
function listAllKeys(resolve, reject, token) {
let allKeys = [];
s3.listObjectsV2({ Bucket: s3bucket, ContinuationToken: token }).promise()
.then((data) => (allKeys = allKeys.concat(data.Contents), data.IsTruncated ? listAllKeys(resolve, reject, data.NextContinuationToken) : resolve(allKeys.length)))
.catch(reject);
}
module.exports = { uploadLocal, uploadS3, deleteS3, bucketSize };