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I'm not a coder, or not in the traditional sense. I just haven't honed my command of it,
but I'm wondering if maybe by using or creating some more robust file manipulation extensions, we can open...

great, but how?

sort of not. it will most likely only give you your IP relative to the machine running the HTML code, which is probably your internal (subnet) address

barcode scanner hardware acts like a keyboard most of the time, it should be a simple matter of taking keyboard input and parsing it.