| appinfo | 5 years ago |
| lib/Controller | 6 years ago |
| COPYING | 6 years ago |
| Readme.md | 6 years ago |
If you host snapshots of web pages on your Nextcloud, this app enables any client that speaks the Memento protocol to access these snapshots. It is part of an experiment aiming to create personal web archives.
The Memento protocol (RFC7089) is widely used to ask archives (such as the Internet Archive’s
Wayback Machine) for their copies of web pages. For example, a client (e.g. a browser extension)
may ask an archive whether it has a copy of https://nextcloud.com from around July last year, and
—if successful— will be redirected to the closest match.
Currently this app only supports snapshots that are stored as plain html files (supporting WARC
files could be a future addition). It recognises a file as being a snapshot if the file contains a
<link> to the location of the original page; such snapshots can be created using Freeze-dry.
For example, assume you have an html file example.html. If this file contains a <link rel="origin" href="https://example.org"> in its <head>, it will be recognised as a snapshot of
https://example.org.
This app presents a Memento TimeGate at the /timegate/{url} route. Assuming that the
example.html of the above example resides in a shared folder with URL /s/123abc, then visiting
/apps/memento/timegate/https://example.org would redirect you to
/apps/raw/s/123abc/example.html (hence you need the Raw app as well).
Note that a private file will only be found if the client supplies login credentials (i.e. the session cookie). Otherwise, only files/folders for which ‘Share link’ is enabled will be scanned.
In a typical Memento client (e.g. the Memento Time Travel browser extension), you would add your
archive as https://my-nextcloud/apps/memento/timegate/ (of course first replace my-nextcloud
appropriately).
A TimeMap is also exposed, at the /timemap/{url} route, to list all available snapshots of a URL.
For details, look at the documentation of the Memento protocol (RFC7089).
The app normally looks for shared snapshots of all users on the Nextcloud instance. To limit results
to those of a single user, use .../u/{userid}/timegate/... instead of .../timegate/... (and
likewise for timemap).
Besides of course Nextcloud itself (tested on version 14), this app requires the app Raw to also be installed, in order to host the snapshots.
Clone this repo into your Nextcloud installation’s /apps (or /custom_apps) folder, ensuring the
folder’s name is memento:
git clone https://code.treora.com/gerben/nextcloud-memento memento
Then log into Nextcloud as admin, find and enable it in the list of apps.
This app is currently not published in the Nextcloud app store.