一个小XMPP client机器人

简单地echo回去，使用两个配置文件，config/database.yml, config/xmpp_account.yml

需要生成rails结构，实际上没有用到数据库连接，只是准备而已。

require "rubygems"
require "active_record"
require "yaml"
require "logger"
Dir["app/models/*.rb"].each(){|f| require f}

require "xmpp4r"

class Robot

  DEFAULT_PORT=5222

  @@xmpp_conn=nil

  @@logger=Logger.new("log/robot.log", "daily")

  def self.error_log(msg)
    @@logger.error(msg)
  end

  def self.exception_log(title,exp)
    error_log(title+exp.message)
    exp.backtrace.each(){|e|error_log("#{e}")}
  end

  def self.debug_log(msg)
    @@logger.debug(msg)
  end

  def self.connect_db
    ActiveRecord::Base.establish_connection(
      YAML.load_file("config/database.yml")["development"])
  end

  def self.connect_xmpp
    ac=YAML.load_file("config/xmpp_account.yml")["default_account"]

    jid=Jabber::JID.new(ac["login_user"])
    j=Jabber::Client.new(jid)
    j.connect(ac["login_host"],ac["login_port"] || Robot::DEFAULT_PORT)
    #auth
    j.auth(ac["password"])
    #online
    p=Jabber::Presence.new(:chat)
    j.send(p)
    #receive message
    j.add_message_callback do |m|
      if m.body!=nil && !m.body.empty?
        process_command(m.body,m)
      end
    end
    @@xmpp_conn=j
  end

  #process command
  def self.process_command(cmd,msg)
    debug_log(cmd)
    return_msg=Jabber::Message::new(msg.from,"command is : #{cmd}")
    return_msg.type=msg.type
    @@xmpp_conn.send(return_msg)
  end

  def self.init_all
    begin
      connect_db()
    rescue => detail
      exception_log("connect database server error:",detail)
      raise(detail)
    end
    begin
      connect_xmpp()
    rescue => detail
      exception_log("connect im server error:",detail)
      raise(detail)
    end
  end
  
  def self.destory_all
    begin
      if @@xmpp_conn && @@xmpp_conn.is_connected?
        @@xmpp_conn.close()
      end
    rescue => detail
      exception_log("connect im server error:",detail)
    end
  end

  def self.get_status
    "im server connection:#{@@xmpp_conn && @@xmpp_conn.is_connected?()} db server connection:#{ActiveRecord::Base.connected?}\n"
  end
  
  def self.prompt
    "input command(type 'help' to get help):"
  end
  def self.run
    puts "init..."
    init_all()
    puts get_status()
    puts prompt()
    #loop
    while (cmd=gets.chomp().strip()) != ?\e do
      case cmd
      when "exit"
        puts "exit..."
        destory_all()
        return
      when "status"
        puts get_status
      when "help"
        puts "\nexit - exit program\nstatus - show im server and db server connection\n"
      end
      puts prompt()
    end
  end
end

连接im服务器是这样的：

先包括XMPP库

require "xmpp4r"

载入帐号配置信息

  ac=YAML.load_file("config/xmpp_account.yml")["default_account"]

连接，并且登录

  jid=Jabber::JID.new(ac["login_user"])
  j=Jabber::Client.new(jid)
  j.connect(ac["login_host"],ac["login_port"] || Robot::DEFAULT_PORT)
  #auth
  j.auth(ac["password"])

上线

  p=Jabber::Presence.new(:chat)
  j.send(p)

process_command是处理发来的消息，现在就是简单地echo回去。

run里面接受三个命令：help,status,exit