A local server for TiddlyWiki5 that allows saving wiki.

tw5-server.rb

require 'webrick'
require 'fileutils'

BIND_ADDRESS = "127.0.0.1"
PORT = 8080

BACKUP_DIR = 'bak'

if ARGV.length != 0
    root = ARGV.first.gsub('\\', '/')
else
    root = '.'
end

module WEBrick
    module HTTPServlet

        class FileHandler
            alias do_PUT do_GET
        end

        class DefaultFileHandler
            def do_PUT(req, res)
                file = "#{@config[:DocumentRoot]}#{req.path}"
                res.body = ''
                unless Dir.exist? BACKUP_DIR
                    Dir.mkdir BACKUP_DIR
                end
                FileUtils.cp(file, "#{BACKUP_DIR}/#{File.basename(file, '.html')}.#{Time.now.to_i.to_s}.html")
                File.open(file, "w+") {|f| f.puts(req.body)}
            end

            def do_OPTIONS(req, res)
                res['Allow'] = "GET,HEAD,OPTIONS,PUT"
                res['dav'] = 'anything' # TW looks for a 'dav' header, and ignores any value
            end

        end
    end
end

server = WEBrick::HTTPServer.new({:Port => PORT, :DocumentRoot => root, :BindAddress => BIND_ADDRESS})

# ctrl-c handler
trap "INT" do
    puts "Shutting down..."
    server.shutdown
end

puts "Serving on http://#{BIND_ADDRESS}:#{PORT}"

server.start

Dir.exists? was deprecated in Ruby 2.1.0 and has been removed in the Ruby 3.2.0

https://www.reddit.com/r/ruby/comments/1196wti/psa_and_a_little_rant_fileexists_direxists/

suggest change:

            unless Dir.exist? BACKUP_DIR
               Dir.mkdir BACKUP_DIR
            end

Hello,
I've noticed this error. Any ideas?
Thanks in advance.

[2024-01-11 19:27:50] ERROR NoMethodError: undefined method `exists?' for Dir:Class
        tw5-server.rb:22:in `do_PUT'
        /usr/lib/ruby/gems/3.2.0/gems/webrick-1.8.1/lib/webrick/httpservlet/abstract.rb:105:in `service'
        /usr/lib/ruby/gems/3.2.0/gems/webrick-1.8.1/lib/webrick/httpservlet/filehandler.rb:315:in `exec_handler'
        /usr/lib/ruby/gems/3.2.0/gems/webrick-1.8.1/lib/webrick/httpservlet/filehandler.rb:246:in `do_GET'
        /usr/lib/ruby/gems/3.2.0/gems/webrick-1.8.1/lib/webrick/httpservlet/abstract.rb:105:in `service'
        /usr/lib/ruby/gems/3.2.0/gems/webrick-1.8.1/lib/webrick/httpservlet/filehandler.rb:242:in `service'
        /usr/lib/ruby/gems/3.2.0/gems/webrick-1.8.1/lib/webrick/httpserver.rb:140:in `service'
        /usr/lib/ruby/gems/3.2.0/gems/webrick-1.8.1/lib/webrick/httpserver.rb:96:in `run'
        /usr/lib/ruby/gems/3.2.0/gems/webrick-1.8.1/lib/webrick/server.rb:310:in `block in start_thread'

with

 ruby --version
ruby 3.2.2 (2023-03-30 revision e51014f9c0) [x86_64-linux-musl]

@ClimaxUke

Use Dir.exist? instead.

@huataihuang - thank you for the suggestion and fix.

May I suggest printing the url the user needs to open? It is more convenient, and less confusing for newer users.

BIND_ADDRESS = "127.0.0.1" # localhost
PORT = 8000

server = WEBrick::HTTPServer.new({:Port => PORT, :DocumentRoot => root, :BindAddress => BIND_ADDRESS})

puts "Serving on http://#{BIND_ADDRESS}:#{PORT}"

May I suggest printing the url the user needs to open? It is more convenient, and less confusing for newer users.

BIND_ADDRESS = "127.0.0.1" # localhost
PORT = 8000

server = WEBrick::HTTPServer.new({:Port => PORT, :DocumentRoot => root, :BindAddress => BIND_ADDRESS})

puts "Serving on http://#{BIND_ADDRESS}:#{PORT}"

Done - thanks.