How can I generate zip file without saving to the disk with Ruby?

Question

I have generated many PDF files in memory and I want to compress them into one zip file before sending it as a email attachment. I have looked at Rubyzip and it does not all

Answer 1

The accepted answer works well but it didn't solve my problem. I didn't want to use the write_buffer method because it automatically closes the stream after the block closes. The code snippet below gives you more control over when the stream is created and closed.

require 'stringio'
require 'zip'

io = StringIO.new
zip_io = Zip::OutputStream.new(io, true) # 'true' indicates 'io' is a stream
zip_io.put_next_entry('test.txt')
zip_io.write('Hello world!')

# Read the data and close the streams
io.rewind
binary_data = io.read
zip_io.close_buffer
io.close