Complete OCR service

[dwhly]

Highest priority:

• Move to docdrop.org/ocr
• Change title to "DocDrop | OCR"
• Handle errors gracefully, do not spin forever.
• Expand limit beyond 12MB?
• Do not show docdrop link in OCR results

We can initially soft-launch after the above issues are fixed ^^

Then:

• When the PDF is dropped initially on the target, display whether or not a selectable text layer is detected.
• Allow two modes of operation (perhaps through a pulldown menu).  (Force re-OCR of entire document, OCR only un-OCR'd pages)  (these should be possible based on these comments here: https://www.reddit.com/r/Python/comments/8qvzc8/critique_cli_tool_for_document_to_text_conversion/e0n73bl/?utm_source=reddit&utm_medium=web2x&context=3
• Ensure that this OCR is also implemented on Docdrop homepage
• Show a progress meter like we do on the docdrop homepage
• Investigate autorotation of pages (whole document or page by page?)
• Clean up implementation, [ELABORATE]

[genuineBuildMonkey]

It looks like I didn't quite get the "has selectable text" portion right.

This happens currently with 1 upload (because right now we have to upload to check that) and it tells you on the results page. Will modify.

[dwhly]

@genuineBuildMonkey:

Can we:

• Show progress uploading inside the upload target box
• Then show file size
• And show whether we found selectable text or not.

If we did find selectable text, should we grey out the "Run OCR" button?

Also--

• remove docdrop link from OCR results