You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
83 lines
2.4 KiB
JavaScript
83 lines
2.4 KiB
JavaScript
const fs = require('fs');
|
|
const { ForbiddenError } = require('../error');
|
|
const db = require('../service/db');
|
|
const gridfs = require('../service/gridfs');
|
|
const hash = require('../lib/hash.hydro');
|
|
|
|
const coll = db.collection('file');
|
|
const collFile = db.collection('fs.files');
|
|
const collChunk = db.collection('fs.chunks');
|
|
|
|
function _timestamp() {
|
|
return Math.floor(Number(new Date()) / 1000000);
|
|
}
|
|
|
|
async function add(streamOrPath, filename, meta = {}) {
|
|
if (typeof streamOrPath === 'string') streamOrPath = fs.createReadStream(streamOrPath);
|
|
const w = gridfs.openUploadStream(filename);
|
|
await coll.insertOne({ ...meta, _id: w.id });
|
|
await new Promise((resolve, reject) => {
|
|
w.on('error', reject);
|
|
w.on('finish', resolve);
|
|
streamOrPath.pipe(w);
|
|
});
|
|
const c = await gridfs.find({ _id: w.id }).toArray();
|
|
await coll.updateOne({ _id: w.id }, { $set: { md5: c[0].md5, size: c[0].size } });
|
|
return w.id;
|
|
}
|
|
|
|
function del(_id) {
|
|
return Promise.all([
|
|
coll.deleteOne({ _id }),
|
|
collFile.deleteOne({ _id }),
|
|
collChunk.deleteMany({ files_id: _id }),
|
|
]);
|
|
}
|
|
|
|
async function inc(_id) {
|
|
const doc = await coll.findOneAndUpdate(
|
|
{ _id },
|
|
{ $inc: { count: 1 } },
|
|
{ returnOriginal: false },
|
|
);
|
|
return (doc.value || {}).count;
|
|
}
|
|
|
|
async function dec(_id) {
|
|
const file = await coll.findOneAndUpdate(
|
|
{ _id },
|
|
{ $inc: { count: -1 } },
|
|
{ returnOriginal: false },
|
|
);
|
|
if (!file.count) await del(_id);
|
|
return file.count;
|
|
}
|
|
|
|
async function get(_id, secret) {
|
|
const file = await coll.findOne({ _id });
|
|
if (typeof secret !== 'undefined') {
|
|
const timestamp = _timestamp();
|
|
if (!hash.check(file.secret, timestamp.toString(), secret)) {
|
|
if (!hash.check(file.secret, timestamp.toString() - 1, secret)) {
|
|
throw new ForbiddenError();
|
|
}
|
|
}
|
|
}
|
|
return gridfs.openDownloadStream(_id);
|
|
}
|
|
|
|
function getMeta(_id) {
|
|
return coll.findOne({ _id });
|
|
}
|
|
|
|
async function url(_id, name) {
|
|
const file = await coll.findOne({ _id });
|
|
const secret = hash.hash(file.secret, _timestamp().toString());
|
|
if (name) return `/fs/${_id}/${Buffer.from(name).toString('base64')}/${secret}`;
|
|
return `/fs/${_id}/${secret}`;
|
|
}
|
|
|
|
global.Hydro.model.file = module.exports = {
|
|
add, get, del, inc, dec, getMeta, url,
|
|
};
|