Consume content of the file without saving the file with express.js?

This is what can be done when you don't want to store the csv in a file system and read the content. In my case, I had to pass the content of csv file as a string to another server (without saving in local system of server).

const multer = require('multer');const upload = multer({ storage: multer.memoryStorage() })app.post(        '/users/bulkUpload',        upload.single('csvFile'),        this.usersRoutes.uploadUserData );

and in uploadUserData():

uploadUserData = async(    req: Request,    res: Response,    next: any): Promise<any> => {    try {        const options = {                formData : {                    'upload': String(req.file.buffer)                },                headers: {                    authorization: req.token,                    'Content-type': 'multipart/form-data'                },                json: true        };        const response = await this.http.post.exec(                '/somePostUrl/',                options        );        return res.status(200).json(response.body);    }catch (error) {        return next(error);    }}

Here, console.log(String(req.file.buffer)) would show you the content of csv file as a string.

I hope it helps you.

With multer library you can store the file uploaded in memory ad use this as a buffer. On Readme file of the project you can find the documentation: github.com/expressjs/multer#memorystorage