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Subject: Re: How to get EXIF data having only the photo URL
From: Andrey Vyrvich <andry.virv...@gmail.com>
To: Google Picasa Web Albums API <google-picasa-data-api@googlegroups.com>
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Thank you Michael!
It works;)

On Mar 4, 12:33=A0pm, Michael Erickson <merick...@google.com> wrote:
> Unfortunately, there is no way to go from the image URL to the required
> information. But you have a few options, depending on what you have
> available to you in chrome extension land (I've only dabbled a bit,
> myself).
> 1. Parse the page url if you are actually on picasaweb.google.com. That
> won't help you otherwise, so probably not a good plan.
> 2. Request the download version of the image URL. That image URL has a se=
t
> structure, as follows:
> =A0 https?://[server]/[4 groups of hash codes]/[image options]/[filename]
>
> The [image options] are optional, as in the example you provided below. Y=
ou
> can insert those options (or replace existing) with either /d/ or /s1600/=
.
> Both of these will have exif data, IIRC. /d/ will set the
> content-disposition to download. =A0If you are capable of loading either =
of
> these in the extension, you should be able to pull the exif off the image
> without using the API.
>
> The example below, as download:http://lh3.ggpht.com/-tWOc0sSfh3E/R04fFhmi=
jhI/AAAAAAAAAGo/7Hx4amKeAcI...
>
> The example below, as large with (limited) exif:http://lh3.ggpht.com/-tWO=
c0sSfh3E/R04fFhmijhI/AAAAAAAAAGo/7Hx4amKeAcI...
>
> Good luck.
> -MErickson
>
> On Sat, Mar 3, 2012 at 7:17 PM, Andrey Vyrvich <andry.virv...@gmail.com>w=
rote:
>
>
>
>
>
>
>
> > Hi guys, I need your advise
> > I'm developer of quite famous Chrome EXIF Viewer (https://
> > chrome.google.com/webstore/detail/lplmljfembbkocngnlkkdgabpnfokmnl)
> > Unfortunately photos hosted on picasaweb have not contain EXIF data,
> > therefore I have to use Picasa Albums API but the problem is that I do
> > not know neither photoId not albumId;
>
> > For example
> > The URL that I have:
> >http://lh3.ggpht.com/-tWOc0sSfh3E/R04fFhmijhI/AAAAAAAAAGo/7Hx4amKeAcI...
> > but the feed url should be:
>
> >http://picasaweb.google.com/data/entry/api/user/gdata.ops.demo/albumi...
>
> > The question is how to convert image URL into the feed URL?
>
> > --
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ps
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