Class which can make any IO object rewindable, including non-rewindable ones. It does this by buffering the data into a tempfile, which is rewindable.
rack.input is required to be rewindable, so if your input stream IO is non-rewindable by nature (e.g. a pipe or a socket) then you can wrap it in an object of this class to easily make it rewindable.
Don‘t forget to call #close when you‘re done. This frees up temporary resources that RewindableInput uses, though it does not close the original IO object.
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# File lib/phusion_passenger/utils/rewindable_input.rb, line 18 18: def initialize(io) 19: @io = io 20: @rewindable_io = nil 21: @unlinked = false 22: end
Closes this RewindableInput object without closing the originally wrapped IO oject. Cleans up any temporary resources that this RewindableInput has created.
This method may be called multiple times. It does nothing on subsequent calls.
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# File lib/phusion_passenger/utils/rewindable_input.rb, line 49 49: def close 50: if @rewindable_io 51: if @unlinked 52: @rewindable_io.close 53: else 54: @rewindable_io.close! 55: end 56: @rewindable_io = nil 57: end 58: end
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# File lib/phusion_passenger/utils/rewindable_input.rb, line 34 34: def each(&block) 35: make_rewindable unless @rewindable_io 36: @rewindable_io.each(&block) 37: end
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# File lib/phusion_passenger/utils/rewindable_input.rb, line 24 24: def gets 25: make_rewindable unless @rewindable_io 26: @rewindable_io.gets 27: end
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# File lib/phusion_passenger/utils/rewindable_input.rb, line 29 29: def read(*args) 30: make_rewindable unless @rewindable_io 31: @rewindable_io.read(*args) 32: end
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# File lib/phusion_passenger/utils/rewindable_input.rb, line 39 39: def rewind 40: make_rewindable unless @rewindable_io 41: @rewindable_io.rewind 42: end