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POGoogle task API authentication issue ruby
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copied!<p>I am having the problem to authenticate a user for google tasks.</p> <p>At first it authenticates the user and do things perfect. But in the second trip it throws an error.</p> <pre><code>Signet::AuthorizationError - Authorization failed. Server message: { "error" : "invalid_grant" }: </code></pre> <p>following is the code:</p> <pre><code>def api_client code="" @client ||= (begin client = Google::APIClient.new client.authorization.client_id = settings.credentials["client_id"] client.authorization.client_secret = settings.credentials["client_secret"] client.authorization.scope = settings.credentials["scope"] client.authorization.access_token = "" #settings.credentials["access_token"] client.authorization.redirect_uri = to('/callbackfunction') client.authorization.code = code client end) end get '/callbackfunction' do code = params[:code] c = api_client code c.authorization.fetch_access_token! result = c.execute("tasks.tasklists.list",{"UserId"=>"me"}) unless result.response.status == 401 p "#{JSON.parse(result.body)}" else redirect ("/oauth2authorize") end end get '/oauth2authorize' do redirect api_client.authorization.authorization_uri.to_s, 303 end </code></pre> <p>What is the problem in performing the second request?</p> <p>UPDATE: This is the link and parameters to user consent.</p> <pre><code>https://accounts.google.com/o/oauth2/auth? access_type=offline& approval_prompt=force& client_id=somevalue& redirect_uri=http://localhost:4567/oauth2callback& response_type=code& scope=https://www.googleapis.com/auth/tasks </code></pre>

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