forbidden response from Vatican

[Jeffrey C. Witt]

Can some help me figure out why I'm getting a 403 forbidden response for image requests to the digital vatican server with the following manifest: 

http://scta.info/iiif/pl-vatlat683/manifest

This is my own manifest, but the sequences sections is copied directly from the official vatican manifest for this: http://digi.vatlib.it/iiif/MSS_Vat.lat.683/manifest.json

The reason I'm making my own manifest is because I want to add a search block and annotations lists to this manifest and I cannot alter the vatican manifest directly. 

However, when I load my own manifest, all the requests for images are returning 403 forbidden. Is that happening for anyone else when they use this manifest: http://scta.info/iiif/pl-vatlat683/manifest ??

But when I use the official manifest from the vatican (http://digi.vatlib.it/iiif/MSS_Vat.lat.683/manifest.json) it seems to work?

Maybe I messed something up in the creation of my own manifest, but I don't think so. 

Help is appreciated. 

jw

[Andrew Hankinson]

We've had lots of problems with the Vatican's provision of IIIF images. It seems the URLs in the manifests are periodically re-freshed (or something?). I also suspect they use the Referer header to block third-party access to their images.

This is all speculative, though -- nobody from the Vatican seems to be chiming in on this list to fill in the blanks on how their IIIF service is structured.

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[Jeffrey C. Witt]

I bet that's what I happening. I made those manifests yesterday. And today they don't work. But for the manifests that I made today, the image requests still work. 

If this is true, this is (in my view) a huge problem and antithetical to the spirit of IIIF

[Andrew Hankinson]

Also: You may want to check if you have an ad-blocker installed and running in your browser. Some of the Vatican Image API URLs contain the string "AD_", which was causing browsers to throw a "Blocked by Client" error in the console.

[Jeffrey C. Witt]

As you suggested, it looks the service id for the actual image has actually change from one day to the next. 

Here's the service id for img0001 today in the official vatican manifest: 

http://digi.vatlib.it/iiifimage/MSS_Vat.lat.683/8446_0-AD1_e360c0f8e7f48e567af043c0f019b73435167d2c9460282af13d1979b0b6a2c3_1474477737421_Vat.lat.683_0001_al_piatto.anteriore.jp2"

And here is what it was yesterday (and present in my custom manifest made yesterday): 

http://digi.vatlib.it/iiifimage/MSS_Vat.lat.683/8446_0-AD1_576e8d8f6d9ffab0cc62b1b98f5253934a2a085699bce41ead05f24ae6e9aba3_1474377001708_Vat.lat.683_0001_al_piatto.anteriore.jp2"

As you can see they've definitely changed. I feel very frustrated by this :(

jw

[Robert Sanderson]

On Tue, Sep 20, 2016 at 10:02 AM, Jeffrey C. Witt <jeffre...@gmail.com> wrote:

I bet that's what I happening. I made those manifests yesterday. And today they don't work. But for the manifests that I made today, the image requests still work. 

If this is true, this is (in my view) a huge problem and antithetical to the spirit of IIIF

Completely agreed!

I wonder whether it's intentional or a side effect of some code that runs and just assigns new UUIDs on export from their system, and they run an export every night.

The Vatican is a member of the IIIF consortium.  It seems like some pressure could be brought to bear from the executive committee...

Rob

[Benjamin L Albritton]

Rather than exerting pressure, I have simply forwarded this e-mail thread to our contact at the Vatican. It is likely, given a number of factors over the last several months, that they were unaware of this discussion and this will give them the opportunity to respond when they are able.

Best,

Ben

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From: iiif-d...@googlegroups.com <iiif-d...@googlegroups.com> on behalf of Robert Sanderson <azar...@gmail.com>
Sent: Tuesday, September 20, 2016 1:16:58 PM
To: iiif-d...@googlegroups.com
Subject: Re: [IIIF-Discuss] forbidden response from Vatican