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e1d423ab4d
git-svn-id: svn+ssh://rubyforge.org/var/svn/mongrel/trunk@349 19e92222-5c0b-0410-8929-a290d50e31e9
202 lines
7.3 KiB
Ruby
202 lines
7.3 KiB
Ruby
# Copyright (c) 2005 Zed A. Shaw
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# You can redistribute it and/or modify it under the same terms as Ruby.
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#
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# Additional work donated by contributors. See http://mongrel.rubyforge.org/attributions.html
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# for more information.
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require 'mongrel'
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require 'cgi'
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require 'sync'
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class Sync
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# modified to open the waiting list for reporting purposes
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attr_accessor :sync_waiting
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end
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module Mongrel
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module Rails
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# Implements a handler that can run Rails and serve files out of the
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# Rails application's public directory. This lets you run your Rails
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# application with Mongrel during development and testing, then use it
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# also in production behind a server that's better at serving the
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# static files.
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#
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# The RailsHandler takes a mime_map parameter which is a simple suffix=mimetype
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# mapping that it should add to the list of valid mime types.
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#
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# It also supports page caching directly and will try to resolve a request
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# in the following order:
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#
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# * If the requested exact PATH_INFO exists as a file then serve it.
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# * If it exists at PATH_INFO+".html" exists then serve that.
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# * Finally, construct a Mongrel::CGIWrapper and run Dispatcher.dispatch to have Rails go.
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#
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# This means that if you are using page caching it will actually work with Mongrel
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# and you should see a decent speed boost (but not as fast as if you use lighttpd).
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#
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# An additional feature you can use is
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class RailsHandler < Mongrel::HttpHandler
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attr_reader :files
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attr_reader :guard
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@@file_only_methods = ["GET","HEAD"]
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def initialize(dir, mime_map = {})
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@files = Mongrel::DirHandler.new(dir,false)
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@guard = Sync.new
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@tick = Time.now
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# register the requested mime types
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mime_map.each {|k,v| Mongrel::DirHandler::add_mime_type(k,v) }
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end
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# Attempts to resolve the request as follows:
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#
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#
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# * If the requested exact PATH_INFO exists as a file then serve it.
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# * If it exists at PATH_INFO+".html" exists then serve that.
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# * Finally, construct a Mongrel::CGIWrapper and run Dispatcher.dispatch to have Rails go.
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def process(request, response)
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if response.socket.closed?
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return
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end
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path_info = request.params[Mongrel::Const::PATH_INFO]
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page_cached = path_info + ".html"
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get_or_head = @@file_only_methods.include? request.params[Mongrel::Const::REQUEST_METHOD]
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if get_or_head and @files.can_serve(path_info)
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# File exists as-is so serve it up
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@files.process(request,response)
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elsif get_or_head and @files.can_serve(page_cached)
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# possible cached page, serve it up
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request.params[Mongrel::Const::PATH_INFO] = page_cached
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@files.process(request,response)
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else
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begin
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cgi = Mongrel::CGIWrapper.new(request, response)
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cgi.handler = self
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# we don't want the output to be really final until we're out of the lock
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cgi.default_really_final = false
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log_threads_waiting_for(request.params["PATH_INFO"] || @active_request_path) if $mongrel_debug_client
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@guard.synchronize(:EX) {
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@active_request_path = request.params["PATH_INFO"]
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Dispatcher.dispatch(cgi, ActionController::CgiRequest::DEFAULT_SESSION_OPTIONS, response.body)
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@active_request_path = nil
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}
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# This finalizes the output using the proper HttpResponse way
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cgi.out("text/html",true) {""}
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rescue Errno::EPIPE
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response.socket.close
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rescue Object => rails_error
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STDERR.puts "#{Time.now}: Error calling Dispatcher.dispatch #{rails_error.inspect}"
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STDERR.puts rails_error.backtrace.join("\n")
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end
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end
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end
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def log_threads_waiting_for(event)
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if Time.now - @tick > 10
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STDERR.puts "#{Time.now}: #{@guard.sync_waiting.length} threads sync_waiting for #{event}, #{self.listener.workers.list.length} still active in mongrel."
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@tick = Time.now
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end
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end
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# Does the internal reload for Rails. It might work for most cases, but
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# sometimes you get exceptions. In that case just do a real restart.
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def reload!
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begin
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@guard.synchronize(:EX) {
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$".replace $orig_dollar_quote
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GC.start
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Dispatcher.reset_application!
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ActionController::Routing::Routes.reload
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}
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end
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end
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end
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# Creates Rails specific configuration options for people to use
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# instead of the base Configurator.
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class RailsConfigurator < Mongrel::Configurator
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# Creates a single rails handler and returns it so you
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# can add it to a uri. You can actually attach it to
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# as many URIs as you want, but this returns the
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# same RailsHandler for each call.
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#
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# Requires the following options:
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#
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# * :docroot => The public dir to serve from.
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# * :environment => Rails environment to use.
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# * :cwd => The change to working directory
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#
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# And understands the following optional settings:
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#
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# * :mime => A map of mime types.
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#
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# Because of how Rails is designed you can only have
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# one installed per Ruby interpreter (talk to them
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# about thread safety). Because of this the first
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# time you call this function it does all the config
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# needed to get your rails working. After that
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# it returns the one handler you've configured.
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# This lets you attach Rails to any URI (and multiple)
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# you want, but still protects you from threads destroying
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# your handler.
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def rails(options={})
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return @rails_handler if @rails_handler
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ops = resolve_defaults(options)
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# fix up some defaults
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ops[:environment] ||= "development"
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ops[:docroot] ||= "public"
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ops[:mime] ||= {}
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$orig_dollar_quote = $".clone
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ENV['RAILS_ENV'] = ops[:environment]
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env_location = "#{ops[:cwd]}/config/environment"
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require env_location
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require 'dispatcher'
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require 'mongrel/rails'
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ActionController::AbstractRequest.relative_url_root = ops[:prefix] if ops[:prefix]
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@rails_handler = RailsHandler.new(ops[:docroot], ops[:mime])
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end
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# Reloads rails. This isn't too reliable really, but
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# should work for most minimal reload purposes. Only reliable
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# way it so stop then start the process.
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def reload!
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if not @rails_handler
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raise "Rails was not configured. Read the docs for RailsConfigurator."
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end
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log "Reloading rails..."
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@rails_handler.reload!
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log "Done reloading rails."
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end
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# Takes the exact same configuration as Mongrel::Configurator (and actually calls that)
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# but sets up the additional HUP handler to call reload!.
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def setup_rails_signals(options={})
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ops = resolve_defaults(options)
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setup_signals(options)
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if RUBY_PLATFORM !~ /mswin/
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# rails reload
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trap("HUP") { log "HUP signal received."; reload! }
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log "Rails signals registered. HUP => reload (without restart). It might not work well."
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end
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end
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end
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end
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end
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