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::COMMON_SEP, Utils::DEFAULT_SEP, Utils::ESCAPE_HTML, Utils::ESCAPE_HTML_PATTERN, Utils::HTTP_STATUS_CODES, Utils::InvalidParameterError, Utils::KeySpaceConstrainedParams, Utils::NULL_BYTE, Utils::PATH_SEPS, Utils::ParameterTypeError, Utils::STATUS_WITH_NO_ENTITY_BODY, Utils::SYMBOL_TO_STATUS_CODE

Instance Method Summary collapse

Methods included from Utils

add_cookie_to_header, add_remove_cookie_to_header, best_q_match, build_nested_query, build_query, byte_ranges, clean_path_info, clock_time, delete_cookie_header!, escape, escape_html, escape_path, get_byte_ranges, key_space_limit, key_space_limit=, make_delete_cookie_header, param_depth_limit, param_depth_limit=, parse_cookies, parse_cookies_header, parse_nested_query, parse_query, q_values, rfc2109, rfc2822, secure_compare, select_best_encoding, set_cookie_header!, status_code, unescape, unescape_path, valid_path?

Constructor Details

#initialize(app) ⇒ Chunked



38
39
40
# File 'lib/rack/chunked.rb', line 38

def initialize(app)
  @app = app
end

Instance Method Details

#call(env) ⇒ Object



53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
# 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)



44
45
46
47
48
49
50
51
# 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