Module: Injour

Defined in:
lib/injour.rb,
lib/injour/version.rb

Defined Under Namespace

Classes: Server

Constant Summary collapse

PORT = 
43215
SERVICE = 
"_injour._tcp"
INJOUR_STATUS = 
File.join(ENV['HOME'], '.injour')
VERSION = 
"0.2.2".freeze

Class Method Summary collapse

Class Method Details

.find(name, first = true) ⇒ Object 



94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
 
# File 'lib/injour.rb', line 94

def self.find(name, first=true)
  hosts = Set.new

  waiting = Thread.current

  service = DNSSD.browse(SERVICE) do |reply|
    if name === reply.name
      DNSSD.resolve(reply.name, reply.type, reply.domain) do |rr|
        hosts << Server.new(reply.name, rr.target, rr.port)
        waiting.run if first
      end
    end
  end

  sleep 5
  service.stop
  hosts
end

.get(name, limit = 10) ⇒ Object 



49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
 
# File 'lib/injour.rb', line 49

def self.get(name, limit = 10)
  hosts = find(name)

  if hosts.empty?
    STDERR.puts "ERROR: Unable to find #{name}"
  elsif hosts.size > 1
    STDERR.puts "ERROR: Multiple possibles found:"
    hosts.each do |host|
      STDERR.puts "  #{host.name} (#{host.host}:#{host.port})"
    end
  else
    # Set is weird. There is no #[] or #at
    hosts.each do |host|
      puts retrieve_status_using_http(host.host, host.port, limit)
    end
  end
end

.get_limit(query_string) ⇒ Object 



119
120
121
122
123
 
# File 'lib/injour.rb', line 119

def self.get_limit(query_string)
  (query_string.match(/number=(\d+)/)[1]).to_i || 5
rescue
  5
end

.get_status(limit = 5) ⇒ Object 



113
114
115
116
117
 
# File 'lib/injour.rb', line 113

def self.get_status(limit = 5)
  File.read(INJOUR_STATUS).split("\n").reverse.slice(0, limit).join("\n")
rescue # If file is not present, show an empty string
  ""  
end

.list(name = nil) ⇒ Object 



67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
 
# File 'lib/injour.rb', line 67

def self.list(name = nil)
  return get(name) if name
  hosts = []

  service = DNSSD.browse(SERVICE) do |reply|
    DNSSD.resolve(reply.name, reply.type, reply.domain) do |rr|
      host = Server.new(reply.name, rr.target, rr.port)
      unless hosts.include? host
        puts "#{host.name} (#{host.host}:#{host.port}) -> #{retrieve_status_using_http(host.host, host.port, 1)}"
        hosts << host
      end
    end
  end

  sleep 5
  service.stop
end

.retrieve_status_using_http(host, port, limit) ⇒ Object 



45
46
47
 
# File 'lib/injour.rb', line 45

def self.retrieve_status_using_http(host, port, limit)
  Net::HTTP.get_response(URI.parse("http://#{host}:#{port}/?number=#{limit}")).body
end

.serve(name = "", port = PORT) ⇒ Object 



125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
 
# File 'lib/injour.rb', line 125

def self.serve(name="", port=PORT)
  name = ENV['USER'] if name.empty?

  tr = DNSSD::TextRecord.new
  tr['description'] = "#{name}'s In/Out"
  
  DNSSD.register(name, SERVICE, "local", port.to_i, tr.encode) do |reply|
    puts "#{name}'s In/Out Records..."
  end
  
  # Don't log anything, everything goes in an abyss
  log = WEBrick::Log.new('/dev/null', WEBrick::Log::DEBUG)
  server = WEBrick::HTTPServer.new(:Port => port.to_i, :Logger => log, :AccessLog => log)

  # Open up a servlet, so that status can be viewed in a browser
  server.mount_proc("/") do |req, res|
    limit = get_limit(req.query_string)
    res.body = get_status(limit)
    res['Content-Type'] = "text/plain"
  end
  # Ctrl+C must quit it
  %w(INT TERM).each do |signal|
    trap signal do
      server.shutdown
      exit!
    end
  end
  # Start the server
  server.start
end

.set_status(message) ⇒ Object 



85
86
87
88
89
90
91
92
 
# File 'lib/injour.rb', line 85

def self.set_status(message)
  File.open(INJOUR_STATUS, 'a') { |file| file.puts("[#{Time.now.strftime("%d-%b-%Y %I:%M %p")}] #{message}") }
  if message !~ /\S/
    puts 'Your status has been cleared.'
  else
    puts "Your status has been set to '#{message}'."
  end
end

.usage ⇒ Object 



21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
 
# File 'lib/injour.rb', line 21

def self.usage
  puts <<-HELP
Usage:

serve [<name>] [<port>]
Start up your injour server as <name> on <port>. <name> is your username
by default, and <port> is 43215. If you want to use the default <name>,
pass it as "".

status/st [<message>]
Publishes your [<message>] on Injour.

list/ls
List all people who are publishing statuses on Injour

show user [<number_of_statuses_to_show>]
Lists the last five updates from the 'user' by default. If you specify number_of_statuses_to_show, it will limit to that number.

help
Displays this message.

  HELP
end