Submission of Microsoft Office files

[danielfang97]

When submitting microsoft office files (.xlsx, .docx), the submission parser is breaking them up into multiple .xml files instead of failing and trying to submit as an attachment.

[cjmyers]

Unfortunately, this appears to be by design. Namely, Microsoft files are containers like Zip files (see http://officeopenxml.com). This means when you submit this file to SBH, it thinks it is a Zip file and unzips it before submitting. When it finds it is a bunch of non-SBOL files, it submits the files one at a time as separate attachments. If you Zip a Microsoft file, then submit it, it will attach as a single file, since we do not recursively unzip. The only way I can think to address this would be to not try to unzip a file unless it ends with ".zip" at the end of the filename. Alternatively, we could not unzip anything with a ".docx", ".pptx", etc. file extension, but I'm not sure what all the extensions are that we should exclude.

@danielfang97 Thoughts?