Class: PinchResponse

Inherits:
Object
  • Object
show all
Defined in:
lib/pinch_response.rb

Overview

This class only implements read_body The rest can be implemented when required

Instance Method Summary collapse

Constructor Details

#initialize(http_response) ⇒ PinchResponse

Prepare pinch response



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# File 'lib/pinch_response.rb', line 8

def initialize(http_response)
  @http_response = http_response
  @zstream       = Zlib::Inflate.new(-Zlib::MAX_WBITS)
  @first_chunk   = true
end

Instance Method Details

#read_body ⇒ Object

Read the body of the HTTP response



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# File 'lib/pinch_response.rb', line 17

def read_body
  if block_given?
    @http_response.read_body do |chunk|
      if @first_chunk
        local_file_header = chunk.unpack('VvvvvvVVVvv')

        @offset_start = 30+local_file_header[9]+local_file_header[10]
        @compressed   = (local_file_header[3] != 0)
        @length       = @compressed ? local_file_header[7] : local_file_header[8]
        @cursor_start = @offset_start
        @to_be_read   = @length

        @first_chunk  = false
      end

      cursor_start = [@cursor_start, 0].max
      cursor_end   = [@to_be_read, chunk.length].min

      data = chunk[cursor_start, cursor_end]

      @cursor_start -= chunk.length

      if data
        @to_be_read -= data.length

        if @compressed
          yield @zstream.inflate(data)
        else
          yield data
        end
      end
    end
  else
    @zstream.inflate @http_response.read_body
  end
end