133 lines
3.4 KiB
Plaintext
133 lines
3.4 KiB
Plaintext
[[Kategorie:Projekt]]
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=Telnet-Haltestellenmonitor=
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<pre>#!/usr/bin/env ruby
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require 'net/http'
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require 'socket'
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require 'rexml/document'
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class MultipleStations < RuntimeError
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def initialize(stations)
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@stations = stations
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end
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def to_s
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"Mehrere mögliche Haltestellen: " + @stations.join(', ')
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end
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end
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class StationResult
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def initialize(card)
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strong_n = 0
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card.each_element('p/strong') { |e|
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case strong_n
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when 0
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@name = e.text
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when 1
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@time = e.text
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end
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strong_n += 1
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}
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@trams = []
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card.to_s.scan(/br\/>(\d+:\d+\*?) (.+?)<br\/>-> (.+?)</) { |time,tram,direction|
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@trams << [time, tram, direction]
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}
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end
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def to_s
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column_widths = [4, 5, 4]
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@trams.each { |a|
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a.each_with_index { |b,i|
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column_widths[i] = b.size if b.size > column_widths[i]
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}
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}
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"\n\n#{@name}, #{@time}:\n\n" +
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'Zeit'.ljust(column_widths[0]) + ' | ' +
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'Linie'.ljust(column_widths[1]) + ' | ' +
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'Ziel'.ljust(column_widths[2]) + "\n" +
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('-' * column_widths[0]) + '-+-' +
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('-' * column_widths[1]) + '-+-' +
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('-' * column_widths[2]) + "\n" +
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@trams.collect { |time,tram,direction|
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time.ljust(column_widths[0]) + ' | ' +
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tram.ljust(column_widths[1]) + ' | ' +
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direction.ljust(column_widths[2])
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}.join("\n")
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end
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end
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class ClientHandler
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def initialize(socket)
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@socket = socket
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puts "#{address} connected"
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Thread.new {
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begin
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handle
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rescue Exception => e
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@socket.puts("Fehler: #{e}")
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ensure
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@socket.close
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end
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}
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end
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def address
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if @socket.peeraddr[0] == 'AF_INET6'
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"[#{@socket.peeraddr[3]}]"
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else
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"#{@socket.peeraddr[3]}"
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end +
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":#{@socket.peeraddr[1]}"
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end
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def ask_haltestellenmonitor(station)
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param = { :station => station,
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:action => :check,
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:time => Time.new.strftime('%H:%M'),
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:date => Time.new.strftime('%d.%m.%Y')
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}
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param_s = param.collect { |k,v| "#{k}=#{v}" }.join('&')
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param_s.gsub!(/ /, '+')
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res = Net::HTTP.start('wap.dvbag.de') { |http|
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http.get('/wapVVO/wap-rbl.php?' + param_s)
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}
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if res.kind_of? Net::HTTPSuccess
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wml = REXML::Document.new(res.body).root
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card = nil
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wml.each_element('/wml/card') { |c| card = c }
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if card
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if card.attributes['id'] == 'liste'
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stations = []
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card.each_element('p/select/option') { |option|
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stations << option.text
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}
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raise MultipleStations.new(stations)
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elsif card.attributes['id'] == 'result'
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StationResult.new(card).to_s
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else
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raise "Unexpected card/@id: #{card.attributes['id']}"
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end
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else
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raise "No card found in result document"
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end
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else
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raise "#{res.class}"
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end
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end
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def handle
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@socket.print "Hallo #{address}\n\nHaltestelle: "
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@socket.flush
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haltestelle = @socket.gets
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if haltestelle
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haltestelle.strip!
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puts "#{address} asks for #{haltestelle.inspect}"
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@socket.puts "Anfrage nach #{haltestelle}..."
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@socket.puts ask_haltestellenmonitor(haltestelle)
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end
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end
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end
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serv = TCPServer.new('0.0.0.0', 65023)
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while client = serv.accept
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ClientHandler.new(client)
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end
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</pre>
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Und dann:
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telnet localhost 65023
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[[Kategorie:Ruby]]
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{{Rübÿ Spëëd Mëtäl Cödïng}}
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