STL (stereolithograpy) File Viewer & Volume Calculator by distracted

I would like software code written that will integrate into my shopping cart. The steps below are as follows: 1. Upload the STL file 2. Check that the file is intact and is a valid STL 3. Provide a rotate and zoom function for file display only 4... (Budget: $30-$250 USD, Jobs: PHP, Software Architecture)
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