Rails: on-the-fly streaming of output in zip format? -

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i need serve data database in zip file, streaming on fly such that:

  • i not write temporary file disk
  • i not compose whole file in ram

i know can streaming generation of zip files filesystemk using zipoutputstream here. know can streaming output rails controller setting response_body proc here. need (i think) way of plugging 2 things together. can make rails serve response zipoutputstream? can zipoutputstream give me incremental chunks of data can feed response_body proc? or there way?

i had similar issue. didn't need stream directly, had first case of not wanting write temp file. can modify zipoutputstream accept io object instead of filename.

module zip   class iooutputstream < zipoutputstream     def initialize io       super '-'       @outputstream = io     end      def stream       @outputstream     end   end end

from there, should matter of using new zip::iooutputstream in proc. in controller, you'd like:

self.response_body =  proc |response, output|   zip::iooutputstream.open(output) |zip|     my_files.each |file|       zip.put_next_entry file       zip << io.read file     end   end end

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