Where is the full size image in GData.Photos query?

I am querying a Picasa gallery and when I dig into the entries that are returned, I can’t find the full size image. I can only see a much smaller, re-sized image (data[0].Content.AbsoluteUri). I know Google retains the full size image because I can see it when I view my Picasa gallery online. Where is the full size image?

var picasaService = new PicasaService("Gallery");

var photoQuery = new PhotoQuery(PicasaQuery.CreatePicasaUri("GOOGLEUSERNAME", "GALLERYID"));
var photoFeed = picasaService.Query(photoQuery);

var data = photoFeed.Entries;

Answers:

Thank you for visiting the Q&A section on Magenaut. Please note that all the answers may not help you solve the issue immediately. So please treat them as advisements. If you found the post helpful (or not), leave a comment & I’ll get back to you as soon as possible.

Method 1

Hidden in the documentation it is possible to specify the size of the images in the feed. This is using the “imgmax” parameter:

https://developers.google.com/picasa-web/docs/2.0/reference#Parameters

Which can have a value set to “d” to request full sized images

This is not supported directly in the c# API, but you can achieve the desired result using the “extraParameters” field on the PhotoQuery object.

Your code then becomes:

var picasaService = new PicasaService("Gallery");

var photoQuery = new PhotoQuery(PicasaQuery.CreatePicasaUri("GOOGLEUSERNAME", "GALLERYID"));
// add the extra parameter to request full size images
photoQuery.ExtraParameters = "imgmax=d";

var photoFeed = picasaService.Query(photoQuery);

var data = photoFeed.Entries;

Method 2

short answer:

media:group/media:content[@url] path in a query to get the gdata photo ENTRY from the picasa GData service contains the link you want.

Longer answer:

1. interactively query the Gdata api for picasa using oauth playground
2. https://code.google.com/oauthplayground and select picasa from the list and get
3. authorize button … then allow access button and you can query the api using the form
4. make a query for the ENTRY URI of desired photo (your …user/.. /albumid .. /photoid )
5. inspect the content of media:group/media:content[@url] sample below
6. The URI to the big photo is valueOf the url attribute in the above expression
7. sample value for one of my picasa photos
8. url=https://lh3.googleusercontent.com/-_FFMNGPU1TQ/TtukXyN4eCI/AAAAAAAACso/EzPmut2iKVQ/DSC01612.JPG

Using the oauth 2.0 playground for a query to get the entry of one of my photos…

Request:
GET /data/entry/api/user/rowntreerob/albumid/5682316071017984417/photoid/5682316083381958690?alt=json

Note: filter response using http://json.parser.online.fr/

Response: 

"media$group":{
"media$content":[
{
"url":"https://lh3.googleusercontent.com/-_FFMNGPU1TQ/TtukXyN4eCI/AAAAAAAACso/EzPmut2iKVQ/DSC01612.JPG",
"height":512,
"width":341,
"type":"image/jpeg",
"medium":"image"
}

The link to the large photo that you want is in the url attribute above…

Using the “fields=” tag, you can directly get the link as in below req/ resp from gdata…

GET /data/entry/api/user/rowntreerob/albumid/5682316071017984417/photoid/5682316083381958690?alt=json&fields=media%3Agroup%2Fmedia%3Acontent%5B%40url%5D

{
"version":"1.0",
"encoding":"UTF-8",
"entry":{
"xmlns":"http://www.w3.org/2005/Atom",
"xmlns$media":"http://search.yahoo.com/mrss/",
"media$group":{
"media$content":[
{
"url":"https://lh3.googleusercontent.com/-_FFMNGPU1TQ/TtukXyN4eCI/AAAAAAAACso/EzPmut2iKVQ/DSC01612.JPG",
"height":512,
"width":341,
"type":"image/jpeg",
"medium":"image"
}
]
}
}
}

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0