Class: Palmade::Tapsilog::Utils

Inherits:
Object
  • Object
show all
Defined in:
lib/palmade/tapsilog/utils.rb

Class Method Summary collapse

Class Method Details

.hash_to_query_string(hash) ⇒ Object 



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# File 'lib/palmade/tapsilog/utils.rb', line 161

def self.hash_to_query_string(hash)
  # Check for frozenness
  if hash == nil
    return nil
  end
  if !hash.respond_to?(:to_hash)
    raise TypeError, "Can't convert #{hash.class} into Hash."
  end
  hash = hash.to_hash
  hash = hash.map do |key, value|
    key = key.to_s if key.kind_of?(Symbol)
    [key, value]
  end
  hash.sort! # Useful default for OAuth and caching

  # Algorithm shamelessly stolen from Julien Genestoux, slightly modified
  buffer = ""
  stack = []
  e = lambda do |component|
    CGI::escape(component.to_s)
  end
  hash.each do |key, value|
    if value.kind_of?(Hash)
      stack << [key, value]
    elsif value.kind_of?(Array)
      stack << [
        key,
        value.inject({}) { |accu, x| accu[accu.size.to_s] = x; accu }
      ]
    elsif value == true
      buffer << "#{e.call(key)}&"
    else
      buffer << "#{e.call(key)}=#{e.call(value)}&"
    end
  end
  stack.each do |(parent, hash)|
    (hash.sort_by { |key| key.to_s }).each do |(key, value)|
      if value.kind_of?(Hash)
        stack << ["#{parent}[#{key}]", value]
      elsif value == true
        buffer << "#{parent}[#{e.call(key)}]&"
      else
        buffer << "#{parent}[#{e.call(key)}]=#{e.call(value)}&"
      end
    end
  end
  buffer.chop
end

.is_port_open?(ip, port) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/palmade/tapsilog/utils.rb', line 15

def self.is_port_open?(ip, port)
  begin
    ::Timeout::timeout(1) do
      begin
        s = TCPSocket.new(ip, port)
        s.close
        return true
      rescue Errno::ECONNREFUSED, Errno::EHOSTUNREACH
        return false
      end
    end
  rescue ::Timeout::Error
  end

  return false
end

.pidf_clean(pid_file) ⇒ Object 



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# File 'lib/palmade/tapsilog/utils.rb', line 90

def self.pidf_clean(pid_file)
  unless pidf_running?(pid_file)
    File.delete(pid_file) if File.exists?(pid_file)
  end
end

.pidf_force_kill(pid_file) ⇒ Object 



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# File 'lib/palmade/tapsilog/utils.rb', line 80

def self.pidf_force_kill(pid_file)
  if pid = pidf_read(pid_file)
    Process.kill("KILL", pid)
    File.delete(pid_file) if File.exist?(pid_file)
    pid
  else
    nil
  end
end

.pidf_kill(pid_file, timeout = 30) ⇒ Object 



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# File 'lib/palmade/tapsilog/utils.rb', line 54

def self.pidf_kill(pid_file, timeout = 30)
  if timeout == 0
    pidf_send_signal('INT', pid_file, timeout)
  else
    pidf_send_signal('QUIT', pid_file, timeout)
  end
end

.pidf_read(pid_file) ⇒ Object 



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# File 'lib/palmade/tapsilog/utils.rb', line 46

def self.pidf_read(pid_file)
  if File.exists?(pid_file) && File.file?(pid_file) && pid = File.read(pid_file)
    pid.to_i
  else
    nil
  end
end

.pidf_running?(pid_file) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/palmade/tapsilog/utils.rb', line 38

def self.pidf_running?(pid_file)
  if pid = pidf_read(pid_file)
    process_running?(pid) ? pid : false
  else
    nil
  end
end

.pidf_send_signal(signal, pid_file, timeout = 30) ⇒ Object 



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# File 'lib/palmade/tapsilog/utils.rb', line 62

def self.pidf_send_signal(signal, pid_file, timeout = 30)
  if pid = pidf_read(pid_file)
    Process.kill(signal, pid)
    ::Timeout.timeout(timeout) do
      sleep 0.1 while process_running?(pid)
    end
    pid
  else
    nil
  end
rescue ::Timeout::Error
  pidf_force_kill pid_file
rescue Interrupt
  pidf_force_kill pid_file
rescue Errno::ESRCH # No such process
  pidf_force_kill pid_file
end

.process_running?(pid) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/palmade/tapsilog/utils.rb', line 32

def self.process_running?(pid)
  Process.getpgid(pid) != -1
rescue Errno::ESRCH
  false
end

.query_string_to_hash(query_string, options = {}) ⇒ Object

Taken from github accumulator/uri



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# File 'lib/palmade/tapsilog/utils.rb', line 98

def self.query_string_to_hash(query_string, options={})
  defaults = {:notation => :subscript}
  options = defaults.merge(options)
  if ![:flat, :dot, :subscript].include?(options[:notation])
    raise ArgumentError,
      "Invalid notation. Must be one of: [:flat, :dot, :subscript]."
  end
  dehash = lambda do |hash|
    hash.each do |(key, value)|
      if value.kind_of?(Hash)
        hash[key] = dehash.call(value)
      end
    end
    if hash != {} && hash.keys.all? { |key| key =~ /^\d+$/ }
      hash.sort.inject([]) do |accu, (key, value)|
        accu << value; accu
      end
    else
      hash
    end
  end
  return nil if query_string == nil
  return ((query_string.split("&").map do |pair|
    pair.split("=", -1) if pair && pair != ""
  end).compact.inject({}) do |accumulator, (key, value)|
    value = true if value.nil?
    key = CGI::unescape(key)
    if value != true
      value = CGI::unescape(value).gsub(/\+/, " ")
    end
    if options[:notation] == :flat
      if accumulator[key]
        raise ArgumentError, "Key was repeated: #{key.inspect}"
      end
      accumulator[key] = value
    else
      if options[:notation] == :dot
        array_value = false
        subkeys = key.split(".")
      elsif options[:notation] == :subscript
        array_value = !!(key =~ /\[\]$/)
        subkeys = key.split(/[\[\]]+/)
      end
      current_hash = accumulator
      for i in 0...(subkeys.size - 1)
        subkey = subkeys[i]
        current_hash[subkey] = {} unless current_hash[subkey]
        current_hash = current_hash[subkey]
      end
      if array_value
        current_hash[subkeys.last] = [] unless current_hash[subkeys.last]
        current_hash[subkeys.last] << value
      else
        current_hash[subkeys.last] = value
      end
    end
    accumulator
  end).inject({}) do |accumulator, (key, value)|
    accumulator[key] = value.kind_of?(Hash) ? dehash.call(value) : value
    accumulator
  end
end

.symbolize_keys(hash) ⇒ Object 



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# File 'lib/palmade/tapsilog/utils.rb', line 6

def self.symbolize_keys(hash)
  hash.inject({}){|result, (key, value)|
    new_key = key.kind_of?(String) ? key.to_sym : key
    new_value = value.kind_of?(Hash) ? symbolize_keys(value) : value
    result[new_key] = new_value
    result
  }
end