class Rack::Chunked
# No exception raised
[200, { ‘trailer’ => ‘expires’}, body]
end
{ ‘expires’ => Time.now.to_s }
def body.trailers
body = [“Hello”, “World”]
# error raised
[200, { ‘trailer’ => ‘expires’}, [“Hello”, “World”]]
specify a response body that supports a trailers
method. Example:
headers in the chunked encoding. However, using this requires you manually
This supports the trailer response header to allow the use of trailing
when the response does not include a content-length header.
Middleware that applies chunked transfer encoding to response bodies
def call(env)
but does not have content-length or transfer-encoding headers,
If the rack app returns a response that should have a body,
def call(env) status, headers, body = response = @app.call(env) if chunkable_version?(env[SERVER_PROTOCOL]) && !STATUS_WITH_NO_ENTITY_BODY.key?(status.to_i) && !headers[CONTENT_LENGTH] && !headers[TRANSFER_ENCODING] headers[TRANSFER_ENCODING] = 'chunked' if headers['trailer'] response[2] = TrailerBody.new(body) else response[2] = Body.new(body) end end response end
def chunkable_version?(ver)
def chunkable_version?(ver) case ver # pre-HTTP/1.0 (informally "HTTP/0.9") HTTP requests did not have # a version (nor response headers) when 'HTTP/1.0', nil, 'HTTP/0.9' false else true end end
def initialize(app)
def initialize(app) @app = app end