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mongo-gridfs

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mongo-gridfs

Uses the native GridFSBucket-Api from the new MongoDB NodeJS Driver and wrap it as Promise-Objects


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mongo-gridfs

This is a simple wrapper for the new MongoDB GridFSBucket API.

The old GridStore-API is now deprecated.

How to install

That is simple

npm install mongo-gridfs

OR

yarn add mongo-gridfs

Usage

With MongoClient

const mongoDBConnection = await MongoClient.connect('mongodb://localhost:27017/files');
let gridFS = new MongoGridFS(mongoDBConnection, "attachments");
gridFS.findById("59e085f272882d728e2fa4c2").then((item) => {
    console.log(item);
}).catch((err) => {
    console.error(err);
});

With Mongoose

const mongooseConnection = await Mongoose.connect('mongodb://localhost:27017/files');
let gridFS = new MongoGridFS(mongooseConnection.db, "attachments");
gridFS.findById("59e085f272882d728e2fa4c2").then((item) => {
    console.log(item);
}).catch((err) => {
    console.error(err);
});

Methods

findById

By this method you will simple get the meta-object from the MongoDB as a Promise-Object. If nothing found at the Database, then it will reject and the catch-block will be executed.

gridFS.findById("59e085f272882d728e2fa4c2").then((item) => {
    console.log(item);
}).catch((err) => {
    console.error(err);
});

downloadFile

You will get the file simple written to the filesystem directly from the Database. If nothing found at the Database, then it will reject and the catch-block will be executed.

gridFS.downloadFile("59e085f272882d728e2fa4c2", {
    filename: "test.gif",
    targetDir: "/tmp"
}).then((downloadedFilePath) => {
    console.log(downloadedFilePath);
}).catch((err) => {
    console.error(err);
});

readFileStream

You will get a GridFSBucketReadStream as Promise. If nothing found at the Database, then it will reject and the catch-block will be executed.

This method is very useful, to stream the content directly to the user.

For example with express:

return gridFS.readFileStream(req.params.id).then((item) => {
    item
    .once("error", () => {
        return res.status(400).end();
    }).pipe(res);
}).catch(() => res.status(500));

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Package last updated on 25 Sep 2018

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