Bash function to launch WEBrick HTTP Server

webrick.sh

#!/usr/bin/env bash
# vim: et sw=2 sts=2

# Copyright (c) 2014 Miyakawa Taku
#
# 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.

# Copy and paste the function to your .bashrc.

# Launches WEBrick HTTP Server.
# USAGE: webrick [-b <bind_address=0.0.0.0>] [-p <port=8080>] document_root
webrick() {
  local OPTIND OPTARG opt bind_address=0.0.0.0 port=8080

  while getopts 'b:p:' opt; do
    case $opt in
      b) bind_address=$OPTARG ;;
      p) port=$OPTARG ;;
    esac
  done
  shift `expr $OPTIND - 1`

  if [ $# -ne 1 ]; then
    echo 'USAGE: webrick [-b <bind_address=0.0.0.0>] [-p <port=8080>] document_root' >&2
    return 1
  fi

  local document_root=$1

  ruby - "$bind_address" "$port" "$document_root" <<EOS
    require 'webrick'
    server = WEBrick::HTTPServer.new({
      :BindAddress => ARGV[0],
      :Port => ARGV[1].to_i,
      :DocumentRoot => ARGV[2]
    })
    Signal.trap('INT') {
      if server.status == :Running
        server.shutdown
      end
    }
    server.start
EOS
}