Method: Rack::Lint::Wrapper#each

Defined in:
lib/rack/lint.rb

#each ⇒ Object

Enumerable Body

Raises:



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# File 'lib/rack/lint.rb', line 852

def each
  ## The Enumerable Body must respond to +each+,    raise LintError, "Enumerable Body must respond to each" unless @body.respond_to?(:each)

  ## which must only be called once,    raise LintError, "Response body must only be called once (#{@consumed})" unless @consumed.nil?

  ## must not be called after being closed,    raise LintError, "Response body is already closed" if @closed

  @consumed = :each

  @body.each do |chunk|
    ## and must only yield +String+ values.
    unless chunk.kind_of? String
      raise LintError, "Body yielded non-string value #{chunk.inspect}"
    end

    ##
    ## Middleware must not call +each+ directly on the Body. Instead, middleware can return a new Body that calls +each+ on the original Body, yielding at least once per iteration.
    if @lint[0] == self
      @env['rack.lint.body_iteration'] += 1
    else
      if (@env['rack.lint.body_iteration'] -= 1) > 0
        raise LintError, "New body must yield at least once per iteration of old body"
      end
    end

    @size += chunk.bytesize
    yield chunk
  end

  verify_content_length(@size)

  verify_to_path
end