Module: Iceberg

Defined in:
lib/ibg.rb,
lib/ibg/web.rb,
lib/ibg/storage.rb,
lib/ibg/version.rb

Defined Under Namespace

Classes: FileObject, Storage, WebApp

Constant Summary collapse

HOME_DIR = 
ENV['HOME']
SETTING_DIR = 
File.join(HOME_DIR, '.iceberg')
SETTING_FILE = 
File.join(SETTING_DIR, 'settings.yaml')
SETTING = 
YAML.load(File.read(SETTING_FILE))
IBDB_RECENT = 
'iceberg:recent'
IBDB_TRIPCODE = 
'iceberg:tripcode:'
IBDB_TRIPCODE_SET = 
'iceberg:tripcode:set'
IBDB_TRIPCODE_FUND = 
'iceberg:tripcode:fund:'
IBDB_RECENT_PEERS = 
'iceberg:recentpeers'
IBDB_PEERS = 
'iceberg:peers'
IBDB_SHORT_URL = 
'iceberg:shorturl:'
ALGORITHM = 
'AES-128-CBC'
REDIS = 
if ENV['DB_PORT_6379_TCP_PORT']
  host = ENV['DB_PORT_6379_TCP_ADDR']
  port = ENV['DB_PORT_6379_TCP_PORT'].to_i
  Redis.new(:host => host, :port => port)
else
  Redis.new
end
VERSION = 
"0.0.4"

Class Method Summary collapse

Class Method Details

.download(name, filename, hexdigest) ⇒ Object 



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# File 'lib/ibg.rb', line 146

def self.download(name, filename, hexdigest)
  ctype, disp = case filename ? filename.downcase : nil
    when /\.jpg$/ ; ['image/jpeg', 'inline']
    when /\.png$/ ; ['image/png', 'inline']
    when /\.gif$/ ; ['image/gif', 'inline']
    when /\.mp3$/ ; ['audio/mpeg', 'inline']
    when /\.m4a$/ ; ['audio/mpeg', 'inline']
    when /\.ogg$/ ; ['audio/ogg', 'inline']
    when /\.flac$/ ; ['audio/x-flac', 'inline']
    when /\.alac$/ ; ['audio/alac', 'inline']
    when /\.webm$/ ; ['video/webm', 'inline']
    when /\.txt$/ ; ['text/plain', 'inline']
    else ['application/octet-stream', 'attachment']
  end
  if hexdigest
    digest = [hexdigest].pack('H*')
    cipher = OpenSSL::Cipher::Cipher.new(ALGORITHM).decrypt
    cipher.key = digest[0, 16]
    cipher.iv = digest[4, 16]
  end
  b = Iceberg::Storage.new
  file = b.getobject(name)
  [ctype, disp, file, cipher]
end

.ip2digest(ip) ⇒ Object 



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# File 'lib/ibg.rb', line 171

def self.ip2digest(ip)
  salt = SETTING['local']['salt'] || ''
  Digest::SHA1.hexdigest(salt + ip)
end

.key2url(key) ⇒ Object 



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# File 'lib/ibg.rb', line 198

def self.key2url(key)
  dbkey = IBDB_SHORT_URL + key
  REDIS.get(dbkey)
end

.recordip(ip) ⇒ Object 



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# File 'lib/ibg.rb', line 176

def self.recordip(ip)
  info = JSON.parse(REDIS.hget(IBDB_PEERS, ip2digest(ip)) || '{}')
  info['download'] ||= 0
  info['download'] += 1
  REDIS.hset(IBDB_PEERS, ip2digest(ip), info.to_json)
  REDIS.lrem(IBDB_RECENT_PEERS, 1, ip)
  REDIS.lpush(IBDB_RECENT_PEERS, ip)
  if REDIS.llen(IBDB_RECENT_PEERS) > 10 # TODO
    REDIS.rpop(IBDB_RECENT_PEERS)
  end
end

.upload(path, tripkey, filesize, filemax, text = nil) ⇒ Object 



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# File 'lib/ibg.rb', line 86

def self.upload(path, tripkey, filesize, filemax, text = nil)
  tripkey = nil if tripkey.empty?
  if path
    raise 'size over' if File.new(path).size > filesize
    alldata = File.open(path, 'rb'){|fd| fd.read}
  else
    raise 'size over' if text.size > filesize # TODO convert to binary size
    alldata = text
  end
  digest = Digest::SHA1.digest(alldata)
  hexdigest = digest.unpack('H*')[0]
  cipher = OpenSSL::Cipher::Cipher.new(ALGORITHM).encrypt
  cipher.key = digest[0, 16]
  cipher.iv = digest[4, 16]
  encdata = cipher.update(alldata) + cipher.final
  encdigest = Digest::SHA1.hexdigest(encdata)

  b = Iceberg::Storage.new
  dest = b.getobject(encdigest)
  unless dest.exists?
    dest.write(encdata)
    dest.close rescue nil # TODO
    uploadimpl2(filemax, encdigest)
  end
  if tripkey
    tripcode = Base64.encode64(Digest::SHA1.digest(tripkey))[0, 12]
    tripcode = tripcode.tr('/', '.')
    REDIS.sadd(IBDB_TRIPCODE_SET, tripcode)
    REDIS.sadd(IBDB_TRIPCODE + tripcode, encdigest)
    # TODO test (initial bonus)
    v = REDIS.get(IBDB_TRIPCODE_FUND + tripcode)
    if v
      REDIS.incrby(IBDB_TRIPCODE_FUND + tripcode, 1)
    else
      REDIS.set(IBDB_TRIPCODE_FUND + tripcode, 2)
    end
  end
  {
    :digest => hexdigest,
    :encdigest => encdigest,
    :tripcode => tripcode,
  }
end

.uploadimpl2(filemax, encdigest) ⇒ Object 



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# File 'lib/ibg.rb', line 57

def self.uploadimpl2(filemax, encdigest)
  n = REDIS.lpush(IBDB_RECENT, encdigest)
  tripcodelist = REDIS.smembers(IBDB_TRIPCODE_SET) || []
  while n.size > filemax
    n = REDIS.llen(IBDB_RECENT)
    dropdigest = REDIS.rpop(IBDB_RECENT)
    b = Iceberg::Storage.new
    dropfile = b.getobject(dropdigest)
    dropsize = dropfile.content_length / (1024 * 1024) # MiB
    dropsize = 1 if dropsize <= 0 # TODO handle under 1 MiB
    found = false
    tripcodelist.each do |tripcode|
      next unless REDIS.sismember(IBDB_TRIPCODE + tripcode, dropdigest)
      v = REDIS.get(IBDB_TRIPCODE_FUND + tripcode)
      if v.to_i > 0
        REDIS.decrby(IBDB_TRIPCODE_FUND + tripcode, dropsize)
        found = true
        break
      end
    end
    unless found
      # TODO do not remove small files (for now)
      dropfile.delete if dropfile.content_length > 64 * 1024 # 64 KiB
      break
    end
    REDIS.lpush(IBDB_RECENT, dropdigest)
  end
end

.uploadraw(path, filesize, filemax) ⇒ Object 



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# File 'lib/ibg.rb', line 130

def self.uploadraw(path, filesize, filemax)
  raise 'size over' if File.new(path).size > filesize
  encdata = File.open(path, 'rb'){|fd| fd.read} # TODO large file
  encdigest = Digest::SHA1.hexdigest(encdata)
  # TODO check filename
  b = Iceberg::Storage.new
  dest = b.getobject(encdigest)
  unless dest.exists?
    dest.write(encdata)
    dest.close rescue nil # TODO
    uploadimpl2(filemax, encdigest)
  end
  {
  }
end

.url2key(url, seconds) ⇒ Object 



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# File 'lib/ibg.rb', line 188

def self.url2key(url, seconds)
  key = "%010d" % rand(10000000000)
  dbkey = IBDB_SHORT_URL + key
  unless REDIS.exists(dbkey) # TODO retry
    REDIS.set(dbkey, url)
    REDIS.expire(dbkey, seconds)
    key
  end
end