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prespawn
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prespawn
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#!/usr/bin/env ruby
# Phusion Passenger - http://www.modrails.com/
# Copyright (c) 2010 Phusion
#
# "Phusion Passenger" is a trademark of Hongli Lai & Ninh Bui.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
STDOUT.sync = true
STDERR.sync = true
require 'uri'
url = ARGV[0]
begin
uri = URI.parse(url)
rescue URI::InvaludURIError
STDERR.puts "*** ERROR: '#{url}' is not a valid URL."
exit 1
end
if uri.scheme.nil? || uri.host.nil? || uri.port.nil? || uri.path.nil?
STDERR.puts "*** ERROR: '#{url}' is not a valid URL."
exit 1
end
require 'socket'
path = uri.path.empty? ? "/" : uri.path
socket = TCPSocket.new('127.0.0.1', uri.port)
if uri.scheme == 'https'
require 'openssl'
socket = OpenSSL::SSL::SSLSocket.new(socket)
socket.sync_close = true
socket.connect
end
begin
socket.write("HEAD #{path} HTTP/1.1\r\n")
socket.write("Host: #{uri.host}\r\n")
socket.write("Connection: close\r\n")
socket.write("\r\n")
if socket.respond_to?(:close_write)
socket.close_write
socket.read
else
socket.readline
end
ensure
socket.close
end