50 lines
1.1 KiB
Ruby
50 lines
1.1 KiB
Ruby
require 'rack/utils'
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module Rack
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# Middleware that applies chunked transfer encoding to response bodies
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# when the response does not include a Content-Length header.
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class Chunked
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include Rack::Utils
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def initialize(app)
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@app = app
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end
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def call(env)
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status, headers, body = @app.call(env)
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headers = HeaderHash.new(headers)
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if env['HTTP_VERSION'] == 'HTTP/1.0' ||
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STATUS_WITH_NO_ENTITY_BODY.include?(status) ||
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headers['Content-Length'] ||
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headers['Transfer-Encoding']
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[status, headers, body]
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else
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dup.chunk(status, headers, body)
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end
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end
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def chunk(status, headers, body)
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@body = body
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headers.delete('Content-Length')
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headers['Transfer-Encoding'] = 'chunked'
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[status, headers, self]
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end
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def each
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term = "\r\n"
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@body.each do |chunk|
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size = bytesize(chunk)
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next if size == 0
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yield [size.to_s(16), term, chunk, term].join
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end
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yield ["0", term, "", term].join
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end
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def close
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@body.close if @body.respond_to?(:close)
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end
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end
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end
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