# Google API Client
Homepage
http://www.github.com/google/google-api-ruby-client
Authors
Bob Aman, Steven Bazyl
Copyright
Copyright © 2011 Google, Inc.
License
Apache 2.0
[![Build Status](https://secure.travis-ci.org/google/google-api-ruby-client.png)](http://travis-ci.org/google/google-api-ruby-client) [![Dependency Status](https://gemnasium.com/google/google-api-ruby-client.png)](https://gemnasium.com/google/google-api-ruby-client) ## Description The Google API Ruby Client makes it trivial to discover and access supported APIs. ## Install Be sure `http://rubygems.org/` is in your gem sources. For normal client usage, this is sufficient: ```bash $ gem install google-api-client ``` ## Example Usage ```ruby # Initialize the client & Google+ API require 'google/api_client' client = Google::APIClient.new plus = client.discovered_api('plus') # Initialize OAuth 2.0 client client.authorization.client_id = '' client.authorization.client_secret = '' client.authorization.redirect_uri = '' client.authorization.scope = 'https://www.googleapis.com/auth/plus.me' # Request authorization redirect_uri = client.authorization.authorization_uri # Wait for authorization code then exchange for token client.authorization.code = '....' client.authorization.fetch_access_token! # Make an API call result = client.execute( :api_method => plus.activities.list, :parameters => {'collection' => 'public', 'userId' => 'me'} ) puts result.data ``` ## API Features ### API Discovery To take full advantage of the client, load API definitions prior to use. To load an API: ```ruby urlshortener = client.discovered_api('urlshortener') ``` Specific versions of the API can be loaded as well: ```ruby drive = client.discovered_api('drive', 'v2') ``` Locally cached discovery documents may be used as well. To load an API from a local file: ```ruby doc = File.read('my-api.json') my_api = client.register_discovery_document('myapi', 'v1', doc) ``` ### Authorization Most interactions with Google APIs require users to authorize applications via OAuth 2.0. The client library uses [Signet](https://github.com/google/signet) to handle most aspects of authorization. For additional details about Google's OAuth support, see [Google Developers](https://developers.google.com/accounts/docs/OAuth2). Credentials can be managed at the connection level, as shown, or supplied on a per-request basis when calling `execute`. For server-to-server interactions, like those between a web application and Google Cloud Storage, Prediction, or BigQuery APIs, use service accounts. ```ruby key = Google::APIClient::KeyUtils.load_from_pkcs12('client.p12', 'notasecret') client.authorization = Signet::OAuth2::Client.new( :token_credential_uri => 'https://accounts.google.com/o/oauth2/token', :audience => 'https://accounts.google.com/o/oauth2/token', :scope => 'https://www.googleapis.com/auth/prediction', :issuer => '123456-abcdef@developer.gserviceaccount.com', :signing_key => key) client.authorization.fetch_access_token! client.execute(...) ``` ### Batching Requests Some Google APIs support batching requests into a single HTTP request. Use `Google::APIClient::BatchRequest` to bundle multiple requests together. Example: ```ruby client = Google::APIClient.new urlshortener = client.discovered_api('urlshortner') batch = Google::APIClient::BatchRequest.new do |result| puts result.data end batch.add(:api_method => urlshortener.url.insert, :body_object => { 'longUrl' => 'http://example.com/foo' }) batch.add(:api_method => urlshortener.url.insert, :body_object => { 'longUrl' => 'http://example.com/bar' }) client.execute(batch) ``` Blocks for handling responses can be specified either at the batch level or when adding an individual API call. For example: ```ruby batch.add(:api_method=>urlshortener.url.insert, :body_object => { 'longUrl' => 'http://example.com/bar' }) do |result| puts result.data end ``` ### Media Upload For APIs that support file uploads, use `Google::APIClient::UploadIO` to load the stream. Both multipart and resumable uploads can be used. For example, to upload a file to Google Drive using multipart ```ruby drive = client.discovered_api('drive', 'v2') media = Google::APIClient::UploadIO.new('mymovie.m4v', 'video/mp4') metadata = { 'title' => 'My movie', 'description' => 'The best home movie ever made' } client.execute(:api_method => drive.files.insert, :parameters => { 'uploadType' => 'multipart' }, :body_object => metadata, :media => media ) ``` To use resumable uploads, change the `uploadType` parameter to `resumable`. To check the status of the upload and continue if necessary, check `result.resumable_upload`. ```ruby client.execute(:api_method => drive.files.insert, :parameters => { 'uploadType' => 'resumable' }, :body_object => metadata, :media => media ) upload = result.resumable_upload # Resume if needed if upload.resumable? client.execute(upload) end ``` ## Command Line Included with the gem is a command line interface for working with Google APIs. ```bash # Log in google-api oauth-2-login --client-id='...' --client-secret='...' --scope="https://www.googleapis.com/auth/plus.me" # List the signed-in user's activities google-api execute plus.activities.list --api=plus -- userId="me" collection="public" # Start an interactive API session google-api irb >> plus = $client.discovered_api('plus') >> $client.execute(plus.activities.list, {'userId' => 'me', 'collection' => 'public'}) => # returns a response from the API ``` For more information, use `google-api --help` ## Samples See the full list of [samples on Google Code](http://code.google.com/p/google-api-ruby-client/source/browse?repo=samples). ## Support Please [report bugs at the project on Github](https://github.com/google/google-api-ruby-client/issues). Don't hesitate to [ask questions](http://stackoverflow.com/questions/tagged/google-api-ruby-client) about the client or APIs on [StackOverflow](http://stackoverflow.com).