Is there a way to find out if there is binary in an uploaded file or textarea in ruby?
Is there a way to prevent users from uploading files or entering binary data in the text area in the interface. I can't find a method in ruby or javascript to check for binary in a user-made view on my website.
var binary_count = 0;
var isAscii = true;
//binary check
for (var i=0, len=submission.length; i<len; i++){
if (submission[i] > 127){
isAscii=false;
binary_count += 1;
$('.error').html('Binary code is not allowed in submission.').show();
break;
}
}
This method doesn't work in javascript and I also can't find a way to test it in rails. Can anyone guide me in this case?
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1 answer
You cannot validate this user view correctly in javascript because it is always possible to submit data without javascript validation. Therefore, you must check it in the rails. Your validation might be something like this (not validated).
class YourModel < ActiveRecord::Base
validate :proper_string
def proper_string
errors.add(:submission, "Only text allowed") unless submission.force_encoding("UTF-8").valid_encoding?
end
end
With javascript you can only check for usability reasons, but it looks more like a hack attempt, but not user error.
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