class Rack::Chunked

Middleware that applies chunked transfer encoding to response bodies when the response does not include a Content-Length header.

Public Class Methods

new(app) click to toggle source
# File lib/rack/chunked.rb, line 57
def initialize(app)
  @app = app
end

Public Instance Methods

call(env) click to toggle source
# File lib/rack/chunked.rb, line 72
def call(env)
  status, headers, body = @app.call(env)
  headers = HeaderHash.new(headers)

  if ! chunkable_version?(env[SERVER_PROTOCOL]) ||
     STATUS_WITH_NO_ENTITY_BODY.key?(status.to_i) ||
     headers[CONTENT_LENGTH] ||
     headers[TRANSFER_ENCODING]
    [status, headers, body]
  else
    headers.delete(CONTENT_LENGTH)
    headers[TRANSFER_ENCODING] = 'chunked'
    if headers['Trailer']
      [status, headers, TrailerBody.new(body)]
    else
      [status, headers, Body.new(body)]
    end
  end
end
chunkable_version?(ver) click to toggle source

pre-HTTP/1.0 (informally “HTTP/0.9”) HTTP requests did not have a version (nor response headers)

# File lib/rack/chunked.rb, line 63
def chunkable_version?(ver)
  case ver
  when 'HTTP/1.0', nil, 'HTTP/0.9'
    false
  else
    true
  end
end