Making a file upload optional in a form #80
Description
I currently have a form in my application, but if I don't upload a file in the form the form will fail to validate. Here are the relevant parts of my content.h
struct submit_op_form : public cppcms::form {
cppcms::widgets::file image;
submit_op_form() {
image.limits(0,500*1024);
image.mime(booster::regex("(image/(png|jpeg))|$")); //Allow mimetypes of either image/png or image/jpeg
image.filename(booster::regex("([_a-zA-Z0-9]+\\.(png|jpg|jpeg))")); //Allow filenames of the form [text consisting of alphanumeric characters].png/jpg/jpeg
image.mime(booster::regex("(image/(png|jpeg))")); //Allow mimetypes of either image/png or image/jpeg
image.add_valid_magic("\x89\x50\x4E\x47\x0D\x0A\x1A\x0A"); //magic numbers for png files
image.add_valid_magic("\xff\xd8"); //magic numbers for jpeg files
image.add_valid_magic("");
add(image);
}
virtual bool validate() {
if (!form::validate()) {
return false;
}
return true;
}
};
More specifically, I never called image.non_empty() and I added an empty string as a valid magic number but the form still fails to validate.