使用javascript将画布另存为PNG图像在特定文件夹中

Question

I have some graphics made with canvas that I want to save in a specific folder of the user's computer as a .png image.

I'm doing this on the client side:

$(".new_canvas").each( function(index) {

                var dataurl = $(".new_canvas")[index].toDataURL("image/png");

                $.ajax({
                        type: "POST",
                        url: "export_images",
                        data: dataurl,
                        }
                });
            });

On the server side I receive the base64 encoded string but how can I save this image in a specific directory?

I already saw some questions about this and tried a few things but with no success...

Thank you.

Answer 1

save in a specific folder of the user's computer

Oh dear. You absolutely cannot do this. The best you can do is present an image for download from the server, which will go into a download directory, or you can offer a link. You cannot specify where you want a file saved on a user's computer.