Picasa

Ruby library for Picasa Web Albums Data API

Note: Picasa service will retire: Moving on from Picasa

Installation

gem install picasa

Usage

Documentation

client = Picasa::Client.new(user_id: "username@gmail.com")
client.album.list
# => Picasa::Presenter::AlbumList

client.album.show("album_id")
# => Picasa::Presenter::Album

client.photo.create("album_id", file_path: "path/to/my-photo.png")
# => Picasa::Presenter::Photo

Authentication

When request is authenticated, response will contain private data, however this can be controlled by access parameter.

You can authenticate by specifing access_token:

client = Picasa::Client.new(user_id: "some.user@gmail.com", access_token: "access-token")

As authenticating by providing password is no longer possible due to google API shutdown https://developers.google.com/accounts/docs/AuthForInstalledApps you need to set access_token for authenticated requests.

One time usage

For one time usage, you can retrieve access_token from google playground:

Visit https://developers.google.com/oauthplayground
Find "Picasa Web v2"
Click "Authorize APIs" providing your credentials
Click "Exchange authorization code for tokens"
Copy access_token value

OAuth2 integration is not yet supported in this gem.

Permanent server side usage

Go to https://console.developers.google.com
Register an account and create project
On "APIs & auth > Credentials" click "Create new Client ID"
Choose "Installed application > Other"
Note "Client ID" and "Client secret"
Craft URL replacing YOUR_CLIENT_ID https://accounts.google.com/o/oauth2/auth?scope=http://picasaweb.google.com/data/&redirect_uri=urn:ietf:wg:oauth:2.0:oob&response_type=code&client_id=YOUR_CLIENT_ID
Visit URL, grant access to your account and note code
Install gem signet

One time setup, to fetch refresh_token


client_id = "client-id"
client_secret = "client-secret"
code = "authorization-code"

require "signet/oauth_2/client" signet = Signet::OAuth2::Client.new( code: code, token_credential_uri: "https://www.googleapis.com/oauth2/v3/token", client_id: client_id, client_secret: client_secret, redirect_uri: "urn:ietf:wg:oauth:2.0:oob" ) signet.fetch_access_token! signet.refresh_token

* Note `refresh_token`
* Before gem usage, you can get `access_token` by:
```ruby
require "signet/oauth_2/client"
signet = Signet::OAuth2::Client.new(
  client_id: client_id,
  client_secret: client_secret,
  token_credential_uri: "https://www.googleapis.com/oauth2/v3/token",
  refresh_token: refresh_token
)
signet.refresh!

# Use access token with picasa gem
signet.access_token

Proxy

You can connect via proxy server setting https_proxy or HTTPS_PROXY environment variable to valid URL.

Extra

You can install thor script for uploading all photos and videos from given directory:

thor install https://github.com/morgoth/picasa/raw/master/extra/Thorfile --as imagery --force

Updating script can be done by:

thor update imagery

And then use it (it will create album taking title from folder name and upload all photos from that directory):

GOOGLE_USER_ID=your.email@gmail.com GOOGLE_ACCESS_TOKEN=access-token thor imagery:upload path-to-folder-with-photos

If your upload was somehow interrupted, you can resume it by adding --continue option:

GOOGLE_USER_ID=your.email@gmail.com GOOGLE_ACCESS_TOKEN=access-token thor imagery:upload --continue path-to-folder-with-photos

If you run out of quota and want to resize images to fit Picasa free storage limits, you can install rmagick gem and run (this will modify files):

thor imagery:resize path-to-folder-with-photos

Boost

Picasa uses gzipped requests to speedup fetching results. Benchmarks are available on Vinicius Teles gist

morgoth / picasa

readme