Simple webserver which let you explore your files and directories of your system in a browser!

web_based_file_explorer.rb

require 'socket'

HTTP_HEADER = "HTTP/1.1 200/OK\r\nContent-type:text/html\r\n\r\n"
CURRENT_DIR = "."
SPACE_IN_PARAM = "%20"

def file_explorer
  webserver = TCPServer.new("localhost", 2000)
  loop do
    Thread.start(webserver.accept) do |session|
      session.print(HTTP_HEADER)
      render_directory_files(session)
      session.close
    end
  end
end

def render_directory_files(session)
  directory = fetch_directory_param(session)
  Dir.chdir(directory)
  current_directory = Dir.new(CURRENT_DIR)
  format_entries_of(current_directory).each { |file| print_line(session, file) }
end

def fetch_directory_param(session)
  directory = CURRENT_DIR
  request = session.gets
  params = request.sub(/GET\ /, "").split(/HTTP/)[0]
  params_stripped = params.rstrip
  directory = params_stripped.split(/\?/)[1] if params_stripped.include?("?")
  directory = directory.sub(/\%20/, " ") if directory.include?(SPACE_IN_PARAM)
  directory
end

def format_entries_of(directory)
  formatted_entries = []
  directory.entries.each do |entry|
    formatted_entry = format(entry)
    formatted_entries << formatted_entry
  end
  formatted_entries
end

def format(entry)
  File.directory?(entry) ? "<a href=\"http://localhost:2000?#{entry}\">#{entry}/<a>" : entry
end

def print_line(session, text)
  session.print("#{text}<br />")
end

file_explorer