102 lines
3.3 KiB
Ruby
102 lines
3.3 KiB
Ruby
# Copyright 2013 Google Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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require 'signet/oauth_2/client'
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module Google
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class APIClient
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##
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# Represents cached OAuth 2 tokens stored on local disk in a
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# JSON serialized file. Meant to resemble the serialized format
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# http://google-api-python-client.googlecode.com/hg/docs/epy/oauth2client.file.Storage-class.html
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#
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class Storage
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AUTHORIZATION_URI = 'https://accounts.google.com/o/oauth2/auth'
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TOKEN_CREDENTIAL_URI = 'https://accounts.google.com/o/oauth2/token'
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# @return [Object] Storage object.
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attr_accessor :store
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# @return [Signet::OAuth2::Client]
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attr_reader :authorization
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##
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# Initializes the Storage object.
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#
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# @params [Object] Storage object
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def initialize(store)
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@store= store
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end
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##
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# Write the credentials to the specified store.
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#
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# @params [Signet::OAuth2::Client] authorization
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# Optional authorization instance. If not provided, the authorization
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# already associated with this instance will be written.
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def write_credentials(authorization=nil)
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@authorization = authorization if authorization
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if @authorization.respond_to?(:refresh_token) && @authorization.refresh_token
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store.write_credentials(credentials_hash)
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end
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end
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##
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# Loads credentials and authorizes an client.
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# @return [Object] Signet::OAuth2::Client or NIL
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def authorize
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@authorization = false
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cached_credentials = load_credentials
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if cached_credentials && cached_credentials.size > 0
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@authorization = Signet::OAuth2::Client.new(cached_credentials)
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@authorization.issued_at = Time.at(cached_credentials['issued_at'].to_i)
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self.refresh_authorization if @authorization.expired?
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end
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return @authorization
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end
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##
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# refresh credentials and save them to store
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def refresh_authorization
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authorization.refresh!
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self.write_credentials
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end
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private
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##
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# Attempt to read in credentials from the specified store.
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def load_credentials
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store.load_credentials
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end
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##
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# @return [Hash] with credentials
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def credentials_hash
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{
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:access_token => authorization.access_token,
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:authorization_uri => AUTHORIZATION_URI,
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:client_id => authorization.client_id,
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:client_secret => authorization.client_secret,
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:expires_in => authorization.expires_in,
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:refresh_token => authorization.refresh_token,
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:token_credential_uri => TOKEN_CREDENTIAL_URI,
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:issued_at => authorization.issued_at.to_i
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}
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end
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end
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end
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end
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