Class: Rackup::Server

Inherits:
Object
  • Object
show all
Defined in:
lib/rackup/server.rb

Defined Under Namespace

Classes: Options

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = nil) ⇒ Server

Options may include:

  • :app

    a rack application to run (overrides :config and :builder)

  • :builder

    a string to evaluate a Rack::Builder from

  • :config

    a rackup configuration file path to load (.ru)

  • :environment

    this selects the middleware that will be wrapped around
your application. Default options available are:
  - development: CommonLogger, ShowExceptions, and Lint
  - deployment: CommonLogger
  - none: no extra middleware
note: when the server is a cgi server, CommonLogger is not included.

  • :server

    choose a specific Rackup::Handler, e.g. cgi, fcgi, webrick

  • :daemonize

    if truthy, the server will daemonize itself (fork, detach, etc)
if :noclose, the server will not close STDOUT/STDERR

  • :pid

    path to write a pid file after daemonize

  • :Host

    the host address to bind to (used by supporting Rackup::Handler)

  • :Port

    the port to bind to (used by supporting Rackup::Handler)

  • :AccessLog

    webrick access log options (or supporting Rackup::Handler)

  • :debug

    turn on debug output ($DEBUG = true)

  • :warn

    turn on warnings ($-w = true)

  • :include

    add given paths to $LOAD_PATH

  • :require

    require the given libraries

Additional options for profiling app initialization include:

  • :heapfile

    location for ObjectSpace.dump_all to write the output to

  • :profile_file

    location for CPU/Memory (StackProf) profile output (defaults to a tempfile)

  • :profile_mode

    StackProf profile mode (cpu|wall|object)



227
228
229
230
231
232
233
234
235
236
237
238
 
# File 'lib/rackup/server.rb', line 227

def initialize(options = nil)
  @ignore_options = []

  if options
    @use_default_options = false
    @options = options
    @app = options[:app] if options[:app]
  else
    @use_default_options = true
    @options = parse_options(ARGV)
  end
end

Instance Attribute Details

#options ⇒ Object 



240
241
242
243
 
# File 'lib/rackup/server.rb', line 240

def options
  merged_options = @use_default_options ? default_options.merge(@options) : @options
  merged_options.reject { |k, v| @ignore_options.include?(k) }
end

Class Method Details

.default_middleware_by_environment ⇒ Object 



270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
 
# File 'lib/rackup/server.rb', line 270

def default_middleware_by_environment
  m = Hash.new {|h, k| h[k] = []}
  m["deployment"] = [
    [Rack::ContentLength],
    logging_middleware,
    [Rack::TempfileReaper]
  ]
  m["development"] = [
    [Rack::ContentLength],
    logging_middleware,
    [Rack::ShowExceptions],
    [Rack::Lint],
    [Rack::TempfileReaper]
  ]

  m
end

.logging_middleware ⇒ Object 



264
265
266
267
268
 
# File 'lib/rackup/server.rb', line 264

def logging_middleware
  lambda { |server|
    /CGI/.match?(server.server.name) || server.options[:quiet] ? nil : [Rack::CommonLogger, $stderr]
  }
end

.middleware ⇒ Object 



288
289
290
 
# File 'lib/rackup/server.rb', line 288

def middleware
  default_middleware_by_environment
end

.start(options = nil) ⇒ Object

Start a new rack server (like running rackup). This will parse ARGV and provide standard ARGV rackup options, defaulting to load ‘config.ru’.

Providing an options hash will prevent ARGV parsing and will not include any default options.

This method can be used to very easily launch a CGI application, for example:

Rack::Server.start(
  :app => lambda do |e|
    [200, {'content-type' => 'text/html'}, ['hello world']]
  end,
  :server => 'cgi'
)

Further options available here are documented on Rack::Server#initialize



178
179
180
 
# File 'lib/rackup/server.rb', line 178

def self.start(options = nil)
  new(options).start
end

Instance Method Details

#app ⇒ Object 



259
260
261
 
# File 'lib/rackup/server.rb', line 259

def app
  @app ||= options[:builder] ? build_app_from_string : build_app_and_options_from_config
end

#default_options ⇒ Object 



245
246
247
248
249
250
251
252
253
254
255
256
257
 
# File 'lib/rackup/server.rb', line 245

def default_options
  environment  = ENV['RACK_ENV'] || 'development'
  default_host = environment == 'development' ? 'localhost' : '0.0.0.0'

  {
    environment: environment,
    pid: nil,
    Port: 9292,
    Host: default_host,
    AccessLog: [],
    config: "config.ru"
  }
end

#middleware ⇒ Object 



293
294
295
 
# File 'lib/rackup/server.rb', line 293

def middleware
  self.class.middleware
end

#server ⇒ Object 



341
342
343
 
# File 'lib/rackup/server.rb', line 341

def server
  @_server ||= Handler.get(options[:server]) || Handler.default
end

#start(&block) ⇒ Object 



297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
 
# File 'lib/rackup/server.rb', line 297

def start(&block)
  if options[:warn]
    $-w = true
  end

  if includes = options[:include]
    $LOAD_PATH.unshift(*includes)
  end

  Array(options[:require]).each do |library|
    require library
  end

  if options[:debug]
    $DEBUG = true
    require 'pp'
    p options[:server]
    pp wrapped_app
    pp app
  end

  check_pid! if options[:pid]

  # Touch the wrapped app, so that the config.ru is loaded before
  # daemonization (i.e. before chdir, etc).
  handle_profiling(options[:heapfile], options[:profile_mode], options[:profile_file]) do
    wrapped_app
  end

  daemonize_app if options[:daemonize]

  write_pid if options[:pid]

  trap(:INT) do
    if server.respond_to?(:shutdown)
      server.shutdown
    else
      exit
    end
  end

  server.run(wrapped_app, **options, &block)
end