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<title>class Rack::Server::Options - rack-2.2.23 Documentation</title>

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 <li ><a href="#method-i-handler_opts">#handler_opts</a>
 
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<main role="main" aria-labelledby="class-Rack::Server::Options">
 <h1 id="class-Rack::Server::Options" class="class">
 class Rack::Server::Options
 </h1>

<section id="public-instance-5Buntitled-5D-method-details" class="method-section">
 <header>
 <h3>Public Instance Methods</h3>
 </header>

<div id="method-i-handler_opts" class="method-detail ">
 
 <div class="method-heading">
 handler_opts(options)
 
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<div class="method-source-code" id="handler_opts-source">
 <pre># File lib/rack/server.rb, line 127
def handler_opts(options)
 begin
 info = []
 server = Rack::Handler.get(options[:server]) || Rack::Handler.default
 if server &amp;&amp; server.respond_to?(:valid_options)
 info &lt;&lt; &quot;&quot;
 info &lt;&lt; &quot;Server-specific options for #{server.name}:&quot;

has_options = false
 server.valid_options.each do |name, description|
 next if /^(Host|Port)[^a-zA-Z]/.match?(name.to_s) # ignore handler&#39;s host and port options, we do our own.
 info &lt;&lt; &quot; -O %-21s %s&quot; % [name, description]
 has_options = true
 end
 return &quot;&quot; if !has_options
 end
 info.join(&quot;\n&quot;)
 rescue NameError, LoadError
 return &quot;Warning: Could not find handler specified (#{options[:server] || &#39;default&#39;}) to determine handler-specific options&quot;
 end
end</pre>
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<div id="method-i-parse-21" class="method-detail ">
 
 <div class="method-heading">
 parse!(args)
 
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<div class="method-source-code" id="parse-21-source">
 <pre># File lib/rack/server.rb, line 12
def parse!(args)
 options = {}
 opt_parser = OptionParser.new(&quot;&quot;, 24, &#39; &#39;) do |opts|
 opts.banner = &quot;Usage: rackup [ruby options] [rack options] [rackup config]&quot;

lineno = 1
 opts.on(&quot;-e&quot;, &quot;--eval LINE&quot;, &quot;evaluate a LINE of code&quot;) { |line|
 eval line, TOPLEVEL_BINDING, &quot;-e&quot;, lineno
 lineno += 1
 }

opts.on(&quot;-d&quot;, &quot;--debug&quot;, &quot;set debugging flags (set $DEBUG to true)&quot;) {
 options[:debug] = true
 }
 opts.on(&quot;-w&quot;, &quot;--warn&quot;, &quot;turn warnings on for your script&quot;) {
 options[:warn] = true
 }
 opts.on(&quot;-q&quot;, &quot;--quiet&quot;, &quot;turn off logging&quot;) {
 options[:quiet] = true
 }

opts.on(&quot;-I&quot;, &quot;--include PATH&quot;,
 &quot;specify $LOAD_PATH (may be used more than once)&quot;) { |path|
 (options[:include] ||= []).concat(path.split(&quot;:&quot;))
 }

opts.on(&quot;-r&quot;, &quot;--require LIBRARY&quot;,
 &quot;require the library, before executing your script&quot;) { |library|
 (options[:require] ||= []) &lt;&lt; library
 }

opts.separator &quot;&quot;
 opts.separator &quot;Rack options:&quot;
 opts.on(&quot;-b&quot;, &quot;--builder BUILDER_LINE&quot;, &quot;evaluate a BUILDER_LINE of code as a builder script&quot;) { |line|
 options[:builder] = line
 }

opts.on(&quot;-s&quot;, &quot;--server SERVER&quot;, &quot;serve using SERVER (thin/puma/webrick)&quot;) { |s|
 options[:server] = s
 }

opts.on(&quot;-o&quot;, &quot;--host HOST&quot;, &quot;listen on HOST (default: localhost)&quot;) { |host|
 options[:Host] = host
 }

opts.on(&quot;-p&quot;, &quot;--port PORT&quot;, &quot;use PORT (default: 9292)&quot;) { |port|
 options[:Port] = port
 }

opts.on(&quot;-O&quot;, &quot;--option NAME[=VALUE]&quot;, &quot;pass VALUE to the server as option NAME. If no VALUE, sets it to true. Run &#39;#{$0} -s SERVER -h&#39; to get a list of options for SERVER&quot;) { |name|
 name, value = name.split(&#39;=&#39;, 2)
 value = true if value.nil?
 options[name.to_sym] = value
 }

opts.on(&quot;-E&quot;, &quot;--env ENVIRONMENT&quot;, &quot;use ENVIRONMENT for defaults (default: development)&quot;) { |e|
 options[:environment] = e
 }

opts.on(&quot;-D&quot;, &quot;--daemonize&quot;, &quot;run daemonized in the background&quot;) { |d|
 options[:daemonize] = d ? true : false
 }

opts.on(&quot;-P&quot;, &quot;--pid FILE&quot;, &quot;file to store PID&quot;) { |f|
 options[:pid] = ::File.expand_path(f)
 }

opts.on(&quot;--heap HEAPFILE&quot;, &quot;Build the application, then dump the heap to HEAPFILE&quot;) do |e|
 options[:heapfile] = e
 end

opts.on(&quot;--profile PROFILE&quot;, &quot;Dump CPU or Memory profile to PROFILE (defaults to a tempfile)&quot;) do |e|
 options[:profile_file] = e
 end

opts.on(&quot;--profile-mode MODE&quot;, &quot;Profile mode (cpu|wall|object)&quot;) do |e|
 { cpu: true, wall: true, object: true }.fetch(e.to_sym) do
 raise OptionParser::InvalidOption, &quot;unknown profile mode: #{e}&quot;
 end
 options[:profile_mode] = e.to_sym
 end

opts.on_tail(&quot;-h&quot;, &quot;-?&quot;, &quot;--help&quot;, &quot;Show this message&quot;) do
 puts opts
 puts handler_opts(options)

exit
 end

opts.on_tail(&quot;--version&quot;, &quot;Show version&quot;) do
 puts &quot;Rack #{Rack.version} (Release: #{Rack.release})&quot;
 exit
 end
 end

begin
 opt_parser.parse! args
 rescue OptionParser::InvalidOption =&gt; e
 warn e.message
 abort opt_parser.to_s
 end

options[:config] = args.last if args.last &amp;&amp; !args.last.empty?
 options
end</pre>
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