Very Basic REST and the Google Provisioning API In Ruby

 
 def retrieve_user(username)
      raise ArgumentError, "username blank", caller if username.empty?
      resp = @rest_client.GET("/a/feeds/foo.com/user/2.0/#{username}")
      feed = Document.new(resp.body)
      unless ! XPath.match( feed, "/AppsForYourDomainErrors" ).empty?
        xn = ProvXn.new
        xn.givenname = feed.elements["//apps:name"].attributes["givenName"]
        xn.familyname = feed.elements["//apps:name"].attributes["familyName"]
        xn.username = feed.elements["//apps:login"].attributes["userName"]
        return xn
      end
      error_code = feed.elements["//AppsForYourDomainErrors/error"].attributes["errorCode"]
      reason = feed.elements["//AppsForYourDomainErrors/error"].attributes["reason"]
      if error_code == '1301'
        raise ActiveRecord::RecordNotFound
      else
        raise ProvisionerException.new(error_code, reason), "unhandled error"
      end
    end
 
    # currently only supports changes to password.                                                                                                                                                                                           
    def update_user_attributes(attributes)
      raise ArgumentError, "username blank", caller if attributes['username'].empty?
      path = "/a/feeds/foo.com/user/2.0/#{attributes["username"]}"
      xml = <<TXT                     
 
      <?xml version="1.0" encoding="UTF-8"?>                                                                                                                                                                                                 
      <atom:entry xmlns:atom="http://www.w3.org/2005/Atom" xmlns:apps="http://schemas.google.com/apps/2006" xmlns:gd="http://schemas.google.com/g/2005">                                                                                     
        <atom:id>https://apps-apis.google.com/a/feeds/foo.com/user/2.0/#{ attributes['username'] }</atom:id>                                                                                                                                
        <apps:login userName="#{ attributes['username'] }" password="#{ attributes['password'] }" suspended="false" admin="false" changePasswordAtNextLogin="false" agreedToTerms="true"/>                                                   
      </atom:entry>                                                                                                                                                                                                                          
 
TXT
      xmldoc = Document.new(xml)
      resp = @rest_client.PUT(path, xmldoc.to_s)
    end