Introduce photo-dedup-by-date
This program deduplicates photos by the date they were taken. It considers two photos a group if they were separated by less than 5 seconds.
This is a side-by-side port, taking inspiration from the old dataspec.go
code. Notably:
- LDB support has been added in Go. It wasn't needed in JS.
- There is an Href() method on Spec now.
- Go now handles IPV6.
- Go no longer treats access_token specially.
- Go now has Pin.
- I found some issues in the JS while doing this, I'll fix later.
I've also updated the config code to use the new API so that basically
all the Go samples use the code, even if they don't really change.
* Add jobs for grouping similar photos in PhotoGroups
Outline:
- The first photo-dhash job adds a dhash field to each photo. The dhash is a 128 bit
downsampled representation of the photo that works well for visual similarity comparisions.
- The second photo-dedup job groups photos that have similar dhash's into PhotoGroups.
fixes: #2787
The big change here is adding a new Spec class in spec.js. This replaces
DatabaseSpec/DatasetSpec/PathSpec in specs.js, but I'm leaving those in
and moving code over in a later patch. For now, only photos UI.
The photos UI change is to plumb through the authorization token through
the Spec code. For now, it's reading it from a URL parameter, but soon
I'll make it session based (probably localStorage).
The demo-server change is to add the Authorization header into CORS.
Private databases begin with "/p/" - for example, "/kalman" is not
private, but "/p/kalman" is private. They are not the same database.
The bulk of this work is the receipt infrastructure.
A receipt is form data that gives access to a database, encrypted using
secretbox. For example, "Database=/p/kalman&Date=12345678" might encrypt
to "SFH5bcIJ3_XgEbtmi_AdCKTItW20fl90czVl5_pF5PAXhNQ366U1yOpYGAjT".
* A new tool receiptkey generates random receipt (secretbox) keys.
* A new tool receipttool generates receipts for databases.
* demo-server has been updated to check for a receipt in the
Authorization header to access private databases.
receipttool and demo-server must be given the same receipt key.
