I need to develop an API which when gets a GET response with an ID it should download a file where it is stored in MongoDB as a Binary buffer.
If I try to print the binary buffer to console.log it works fine but cannot store it to a file or download it. Need help in how easily accomplish this.
I have tried all below but nothing works,
const bufferData = Buffer.from(result.file.buffer,result.file.mimetype);
const s = fs.createWriteStream(`C:/upload/${result.file.originalname}`);
fs.write('c:/uploads/test.txt',file.buffer);
fs.WriteStream('c:/uploads/test.txt',file.buffer);
async handler(ctx,res) {
console.log("Came to main action handler-- DOWNLOAD");
const fileId = ctx.params.id;
console.log("Download step 1: " + fileId);
try {
const client = await MongoClient.connect(mongoURL);
const db = client.db(dbName);
const collection = db.collection(collectionName);
const result = await collection.findOne({ _id: new ObjectId(fileId) });
console.log("Download step 2: " + result.file.originalname);
const s = fs.createWriteStream(`C:/upload/${result.file.originalname}`);
console.log("Download step 2: " + result.file.buffer);
//const originalData = Buffer.from(result.file.buffer, result.file.mimetype);
const bufferData = Buffer.from(result.file.buffer,result.file.mimetype);
console.log("Download step 2: " + bufferData);
client.close();
} catch (error) {
console.log("error" + error);
}
},
When I hit the API it should download a file with the original data in it. I already have an API which will upload the file to mongoDB in the form of binary buffer. Similarly I need an API to download the file again in its original format.
