ruby on rails - Paperclip Processor Operate on S3 -

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i trying create custom paperclip::processor integrates external web service (the processor call web service whenever new file uploaded). external service needs file present in s3 , handle uploading processed versions s3 automatically.

can done using custom paperclip::processor or should done activerecord callback? if paperclip::processor work, best way trigger upload? ideally i'd processor, requirement original file must uploaded s3 first. have taken @ using after_create calls, seems conflict after_create used in paperclip. thanks.

you can create local copy of file. if it's on s3 downloaded.

tmp_file = @model.attached_file.to_file => tempfile<...>

you can operations on tempfile. when you're don:

@model.attached_file = tmp_file @model.save

edit: misread question. can use before_post_process , after_post_process hooks perform tasks before or after file processed. 

class model < ar::base   has_attached_file :avatar    after_post_process :ping_webservice    private    def ping_webservice     # magic here.   end end

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