I am trying to send data from a remote file attachment....
-------
attachment['url'] = "http://www.mydomain.com/resource/download/54643";

I wrote a class RemoteFile < ::Tempfile to fetch to remote data
------
remote_file = RemoteFile.new(attachment['url'] )
so, I get a tempfile
 >> #<File:/var/folders/NK/NKfWCW3eEVCg0ERnpPsnME+++TI/-Tmp-/
93806edfbb0daf7303347d7faaffc2d0f5b22a1d20100914-5545-1y66mt8-0>

now I would like to pass the content of this temp file as a base64
value
...
ticketing_xml <<  "<value><base64>#{ tmp_data }</base64></value>"
...

how should I do write the  tmp_data  ?

  should I use  :  open(remote_file ).read

thanks for your suggestions

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