dezoomify v3.0.0

dezoomify v3.0.0

Dezoomify 3 is the biggest release yet. For the first time, the website, the
browser extension, and a brand-new command-line tool all share one version and
one engine, so they work the same way and understand the same sites.

What you can do now

The website saves images properly. Paste the address of the page that
shows your image and press Dezoomify !. When the picture is ready, use the
Save button, or right-click it, to keep it as a PNG. A progress counter
shows how far along the download is.

More sites work, with nothing installed. When a site ignores a normal
browser request, the website quietly retries through a small relay that
carries only the image's public description, never the image pieces and never
your credentials. So more images save without any extra setup.

You get clear feedback. If an image is too large for a browser tab, the
website warns you before it breaks and offers a smaller copy. If anything
else goes wrong, you get a short explanation of what happened and the next
step to try, usually pointing to the built-in help.

Several sizes? You choose. Many pages offer more than one resolution.
Dezoomify lists them and picks the largest by default.

Help lives where you need it. The whole user guide now sits inside
Dezoomify and on the website. The old scattered wiki links are gone.

The extension finds images for you, even when you are signed in. It
watches the page you point it at and finds the image behind the viewer. A
small badge shows how many it found. Because it runs in your own browser, it
reaches pages that are only visible to members, such as library portals,
museum subscriptions, and academic archives.

The extension asks only for what it needs. It looks at a page only after
you press the button, and it asks permission for each site you use it on,
never for all your browsing. Your passwords and cookies stay in your browser.

Hand big jobs to a bigger tool. When an image is very large, the
extension offers to pass the job to the command-line tool on your computer,
which can save images of any size and in more formats. It asks your consent
before sharing any site credentials, and they stay in memory only.

A brand-new command-line tool. The dezoomify command is for scripts and
bulk work: download many images from a list, cap or force the resolution, go
slower to stay polite to busy servers, tell it the site's own viewer page
when a server refuses others, and resume a download that stopped partway.

More image formats, plus a last-resort trick. Dezoomify understands more
site formats than before. And when a site has no standard description file at
all, you can describe the shape of its image pieces and it still tries to
reassemble the picture.

Compared with the old Dezoomify

• One version, not three. The website, the extension, and the desktop
  program were separate projects with separate versions. Now they are one.
• Better and more private downloads. The website used to send every image
  through a relay. Now it tries a direct, more private route first and only
  falls back to a relay that never handles your credentials.
• A real Save button. Before, you saved by right-clicking the picture;
  now there's a button, and smaller images download in a click.
• The command-line tool is new. There was no scriptable way to download
  images before; now there is.
• The extension works on members-only pages. Before it only found the
  image address on ordinary pages. Now it can on pages you are signed in to.

What hasn't changed

Dezoomify still never breaks passwords or paywalls. If you can see the image
after signing in, the extension can usually save it; if you can't see it at
all, neither can Dezoomify. It still gathers every small piece of a zoomable
image and reassembles them into one file you can keep.

Desktop installers (Windows, macOS, Linux) are not in this release yet; the
command-line tool gives you that power today.

For the technically curious

• stable channel release, built from tagged revision 7e5bd49459bb.
• Protocol 1.0, peers back to 1.0.
• Artifacts: dezoomify-cli-v3.0.0-linux-x86_64.tar.gz,
  dezoomify-chromium-v3.0.0.zip, dezoomify-firefox-v3.0.0.zip, each with a
  GPG detached signature (.sig). Verify digests against SHA256SUMS; the
  signing public key is release/gpg-public-key.asc in the repository.
• Install and usage: see the user guide.