Multer media

Installation

$ yarn add multer-media

Usage

  const upload = multer({
      storage: multerMedia({
        algorithm: 'md5',
        
        destination: (
          req: ExpressRequest,
          file: Express.Multer.File,
          callback: (error: Error | null, path: string) => void,
        ) => {
          callback(null, '/tmp/my-uploads');
        },
        
        filename: (
          req: ExpressRequest,
          file: Express.Multer.File,
          callback: (error: Error | null, path: string) => void,
        ) => {
          const uniqueSuffix = Date.now() + '-' + Math.round(Math.random() * 1E9)
          callback(null, file.fieldname + '-' + uniqueSuffix);
        },

        /**
         * A function that will be executed on start
         *
         * @param req The Express `Request` object.
         * @param file Object containing information about the processed file.
         * @param src Stream Readable
         */
        start?: (
          req: Request,
          file: Express.Multer.File,
          outStream?: stream.Writable,
          chunk?: any,
          encoding?: BufferEncoding,
        ) => {},

        /**
         * A function that will be executed on write events
         *
         * @param req The Express `Request` object.
         * @param file Object containing information about the processed file.
         * @param src Stream Readable
         */
        write?: (
          req: Request,
          file: Express.Multer.File,
          outStream?: stream.Writable,
          chunk?: any,
          encoding?: BufferEncoding,
        ) => {},

        /**
         * A function that will be executed on write events
         *
         * @param req The Express `Request` object.
         * @param file Object containing information about the processed file.
         * @param src Stream Readable
         */
        finish?: (
          req: Request,
          file: Express.Multer.File,
          outStream?: stream.Writable,
          chunk?: any,
          encoding?: BufferEncoding,
        ) => {},
      }),
  });

API

File information

Each file contains the following information:

Key	Type	Description
fieldname	string	Field name specified in the form
originalname	string	Name of the file on the user's computer
encoding	string	Encoding type of the file
mimetype	string	Mime type of the file
size	number	Size of the file in bytes
destination	string	The folder to which the file has been saved
filename	string	The name of the file within the destination
path	string	The full path to the uploaded file
hash	string	Hash with algorithm the file
media	FfprobeData	Media probe of this file, using ffmpeg-static