I'm trying to return the requested image file. My client is downloading the file, but I can't display it because it's an invalid png file. If I open the stored file tmpFile.png, I can see it correctly. So probably the problem is on how I'm sending it back to the client asking for it.

// This is my controller

async getFile(@Param('bucketname') bucketName: string,

            @Param('filename') fileName: string) {

return await this.appService.getFile(bucketName, fileName);





// This is the function called

getFile(bucketName: string, fileName: string) {

    return new Promise(resolve => {

      this.minioClient.getObject(bucketName, fileName, (e, dataStream) => {

        if (e) {

          console.log(e);

        }



        let size = 0;

        const binary = fs.createWriteStream('tmpFile.png');



        dataStream.on('data', chunk => {

          size += chunk.length;

          binary.write(chunk);

        });

        dataStream.on('end', () => {

          binary.end();

          resolve(binary);

        });

      });

    });

  }