The invention discloses an image forming apparatus, a method of controlling the same and a computer-readable storage medium. According to the present invention, there is provided an image forming apparatus that has a scan function. The image forming apparatus comprises a restriction converter for converting, in a case in which a file upload and a file restriction are designated in a web content received from a web server, the file restriction into a scan function restriction, a scan cooperation unit for calling, in accordance with a file input instruction made by a user for the designation ofthe file upload, the scan function with the restriction converted by the restriction conversion unit, and a transmitter for transmitting a file generated by the scan function called by the scan cooperation unit to the web server.