Class: Rack::Chunked

Inherits:
Object
  • Object
show all
Includes:
Utils
Defined in:
lib/rack/chunked.rb

Overview

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

Defined Under Namespace

Classes: Body

Constant Summary

Constants included from Utils

Utils::DEFAULT_SEP, Utils::ESCAPE_HTML, Utils::ESCAPE_HTML_PATTERN, Utils::HTTP_STATUS_CODES, Utils::Multipart, Utils::PATH_SEPS, Utils::STATUS_WITH_NO_ENTITY_BODY, Utils::SYMBOL_TO_STATUS_CODE

Instance Method Summary collapse

Methods included from Utils

best_q_match, build_nested_query, build_query, byte_ranges, bytesize, clean_path_info, delete_cookie_header!, escape, escape_html, escape_path, normalize_params, params_hash_type?, parse_nested_query, parse_query, q_values, rfc2109, rfc2822, secure_compare, select_best_encoding, set_cookie_header!, status_code, unescape

Constructor Details

#initialize(app) ⇒ Chunked

Returns a new instance of Chunked.



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# File 'lib/rack/chunked.rb', line 38

def initialize(app)
  @app = app
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/rack/chunked.rb', line 53

def call(env)
  status, headers, body = @app.call(env)
  headers = HeaderHash.new(headers)

  if ! chunkable_version?(env['HTTP_VERSION']) ||
     STATUS_WITH_NO_ENTITY_BODY.include?(status) ||
     headers[CONTENT_LENGTH] ||
     headers['Transfer-Encoding']
    [status, headers, body]
  else
    headers.delete(CONTENT_LENGTH)
    headers['Transfer-Encoding'] = 'chunked'
    [status, headers, Body.new(body)]
  end
end

#chunkable_version?(ver) ⇒ Boolean

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

Returns:

  • (Boolean) 


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# File 'lib/rack/chunked.rb', line 44

def chunkable_version?(ver)
  case ver
  when "HTTP/1.0", nil, "HTTP/0.9"
    false
  else
    true
  end
end