def main(_):
# tf.device('/gup:0')
''' Trains model from data '''
if not os.path.exists(FLAGS.train_dir):
os.mkdir(FLAGS.train_dir)
print('Created training directory', FLAGS.train_dir)
char_vocab, char_tensors, char_lens, max_word_length = load_data(FLAGS.data_dir, 70)
train_reader = DataReader(char_tensors['train'], char_lens['train'], FLAGS.batch_size)
print('initialized all dataset readers')
with tf.Graph().as_default(), tf.Session() as session:
# tensorflow seed must be inside graph
tf.set_random_seed(FLAGS.seed)
np.random.seed(seed=FLAGS.seed)
''' build training graph '''
# initializer = tf.random_uniform_initializer(-FLAGS.param_init, FLAGS.param_init)
# initializer = tf.random_uniform_initializer(0.0, 2 * FLAGS.param_init)
initializer = tf.contrib.layers.xavier_initializer()
with tf.variable_scope("Model", initializer=initializer):
train_model = dga_model.inference_graph(
char_vocab_size=char_vocab.size,
char_embed_size=FLAGS.char_embed_size,
batch_size=FLAGS.batch_size,
num_highway_layers=FLAGS.highway_layers,
num_rnn_layers=FLAGS.rnn_layers,
rnn_size=FLAGS.rnn_size,
max_word_length=max_word_length,
kernels=eval(FLAGS.kernels),
kernel_features=eval(FLAGS.kernel_features),
dropout=FLAGS.dropout,
embed_dimension=FLAGS.embed_dimension)
train_model.update(dga_model.decoder_graph(train_model.embed_output,
char_vocab_size=char_vocab.size,
batch_size=FLAGS.batch_size,
num_highway_layers=FLAGS.highway_layers,
num_rnn_layers=FLAGS.rnn_layers,
rnn_size=FLAGS.rnn_size,
max_word_length=max_word_length,
kernels=eval(FLAGS.kernels),
kernel_features=eval(FLAGS.kernel_features),
dropout=FLAGS.dropout,
))
train_model.update(dga_model.en_decoder_loss_graph(train_model.input,
train_model.input_len_g,
train_model.decoder_output,
batch_size=FLAGS.batch_size,
max_word_length=max_word_length
))
train_model.update(dga_model.genearator_layer(batch_size=FLAGS.batch_size,
input_dimension=FLAGS.random_dimension,
max_word_length=max_word_length,
embed_dimension=FLAGS.embed_dimension))
train_model.update(dga_model.generator_layer_loss(train_model.gl_output,
batch_size=FLAGS.batch_size,
max_word_length=max_word_length,
embed_dimension=FLAGS.embed_dimension
))
train_model.update(
dga_model.lr(train_model.gl_output, FLAGS.batch_size, max_word_length, FLAGS.embed_dimension))
train_model.update(dga_model.lr_loss(train_model.lr_output, batch_size=FLAGS.batch_size))
# scaling loss by FLAGS.num_unroll_steps effectively scales gradients by the same factor.
# we need it to reproduce how the original Torch code optimizes. Without this, our gradients will be
# much smaller (i.e. 35 times smaller) and to get system to learn we'd have to scale learning rate and max_grad_norm appropriately.
# Thus, scaling gradients so that this trainer is exactly compatible with the original
train_model.update(dga_model.autoencoder_train_graph(train_model.en_decoder_loss,
FLAGS.learning_rate,
FLAGS.max_grad_norm))
train_model.update(dga_model.lr_train_graph(train_model.lr_loss,
FLAGS.learning_rate,
FLAGS.max_grad_norm))
train_model.update(dga_model.generator_train_graph(train_model.gl_loss,
FLAGS.learning_rate,
FLAGS.max_grad_norm))
# create saver before creating more graph nodes, so that we do not save any vars defined below
saver = tf.train.Saver(max_to_keep=50)
if FLAGS.load_model:
saver.restore(session, FLAGS.load_model)
print('Loaded model from', FLAGS.load_model, 'saved at global step',
train_model.global_step_autoencoder.eval())
else:
tf.global_variables_initializer().run()
session.run(train_model.clear_char_embedding_padding)
print('Created and initialized fresh model. Size:', dga_model.model_size())
summary_writer = tf.summary.FileWriter(FLAGS.train_dir, graph=session.graph)
tf.summary.merge_all()
''' take learning rate from CLI, not from saved graph '''
session.run(
[tf.assign(train_model.learning_rate, FLAGS.learning_rate),
tf.assign(train_model.lr_learning_rate, FLAGS.learning_rate),
tf.assign(train_model.gl_learning_rate, FLAGS.learning_rate),
tf.assign(train_model.lr_learning_rate_g, FLAGS.learning_rate), ]
)
''' training autoencoder here '''
print("***************train autoencoder********************")
rnn_state_g, rnn_state_d = session.run([train_model.initial_rnn_state_g, train_model.initial_rnn_state_d])
print("Start to train auto-encoder.....\n")
for epoch in range(FLAGS.max_epochs):
epoch_start_time = time.time()
avg_train_loss = 0.0
count = 0
for x, y in train_reader.iter():
count += 1
start_time = time.time()
loss, _, rnn_state_g, rnn_state_d, step, _, generated_dga, mask1, mask2, loss1, loss2 = session.run([
train_model.en_decoder_loss,
train_model.train_op,
train_model.final_rnn_state_g,
train_model.final_rnn_state_d,
# train_model.global_norm,
train_model.global_step_autoencoder,
train_model.clear_char_embedding_padding,
train_model.generated_dga,
train_model.mask1,
train_model.mask2,
train_model.loss1,
train_model.loss2,
], {
train_model.input: x,
train_model.input_len_g: y,
train_model.initial_rnn_state_g: rnn_state_g,
train_model.initial_rnn_state_d: rnn_state_d
})
avg_train_loss += 0.05 * (loss - avg_train_loss)
# time_elapsed = time.time() - start_time
time_elapsed = time.time() - epoch_start_time
if count % FLAGS.print_every == 0:
print(
'AutoEncoder: %6d: %d [%5d/%5d], loss1/2 = %6.8f/%6.8f, train_loss/perplexity = %6.8f/%6.7f secs/batch = %.4fs' % (
step,
epoch, count, train_reader.length, loss1, loss2, loss, np.exp(loss),
time_elapsed
))
print(char_vocab.change(x[0]) + " ---> " + char_vocab.change(generated_dga[0]))
summary = tf.Summary(value=[
tf.Summary.Value(tag="train_loss", simple_value=avg_train_loss),
])
summary_writer.add_summary(summary, step)
train_reader.shuf()
print('Epoch training time:', time.time() - epoch_start_time)
save_as = '%s/autoencoder_epoch%03d_%.4f.model' % (FLAGS.train_dir, epoch, avg_train_loss)
saver.save(session, save_as)
# saver.save(session, "autoencoder.model")
np_random = np.random.RandomState(FLAGS.seed)
''' training generator here '''
print("***************train generator********************")
for epoch in range(FLAGS.max_epochs_gl):
epoch_start_time = time.time()
avg_gl_loss = 0.0
count = 0
for x, y in train_reader.iter():
count += 1
start_time = time.time()
rnn_state_g, _, embed_output = session.run([
train_model.final_rnn_state_g,
train_model.clear_char_embedding_padding,
train_model.embed_output,
], {
train_model.input: x,
train_model.input_len_g: y,
train_model.initial_rnn_state_g: rnn_state_g,
})
generator_input = np_random.rand(FLAGS.batch_size, FLAGS.random_dimension)
gl_loss, _, step_gl = session.run([
train_model.gl_loss,
train_model.train_op_gl,
train_model.global_step_gl,
], {
train_model.gl_input: generator_input,
train_model.gl_target: embed_output
})
avg_gl_loss += 0.05 * (gl_loss - avg_gl_loss)
time_elapsed = time.time() - start_time
if count % FLAGS.print_every == 0:
print('Generator Layer: %6d: %d [%5d/%5d], train_loss = %6.8f secs/batch = %.4fs' % (
step_gl, epoch, count, train_reader.length, gl_loss, time_elapsed))
gl_summary = tf.Summary(value=[
tf.Summary.Value(tag="gl_loss", simple_value=avg_gl_loss),
])
summary_writer.add_summary(gl_summary, step_gl)
train_reader.shuf()
print('Epoch training time:', time.time() - epoch_start_time)
save_as = '%s/gl_epoch%03d_%.4f.model' % (FLAGS.train_dir, epoch, avg_gl_loss)
saver.save(session, save_as)
# saver.save(session, "gl.model")
''' training lr here '''
print("***************train logistic regression********************")
for epoch in range(FLAGS.max_epochs_lr):
epoch_start_time = time.time()
avg_lr_loss = 0.0
avg_gr_loss = 0.0
count = 0
for x, y in train_reader.iter():
count += 1
start_time = time.time()
if (count % FLAGS.iteration) != 0:
generator_input = np_random.rand(FLAGS.batch_size, FLAGS.random_dimension)
gl_output = session.run([
train_model.gl_output,
], {
train_model.gl_input: generator_input,
})
rnn_state_g, _, embed_output = session.run([
train_model.final_rnn_state_g,
train_model.clear_char_embedding_padding,
train_model.embed_output,
], {
train_model.input: x,
train_model.input_len_g: y,
train_model.initial_rnn_state_g: rnn_state_g,
})
# origin_dga = [char_vocab.change(dga).replace(" ", "") for dga in generated_dga]
target = np.zeros([FLAGS.batch_size])
# generated_dga[0: int(len(generated_dga) / 2)] = x[0: int(len(generated_dga) / 2)]
target[0: int(len(target) / 2)] = np.ones([int(len(target) / 2)])
gl_output = gl_output[0]
gl_output[0: int(len(embed_output) / 2)] = embed_output[0: int(len(embed_output) / 2)]
#
# for i in range(int(len(generated_dga) / 2), len(generated_dga)):
# dga_len = 0
# dga = generated_dga[i]
# for dga_char in dga:
# if dga_char == ' ':
# break
# dga_len += 1
# y[i] = dga_len
lr_loss_d, _, step_lr = session.run([
train_model.lr_loss,
train_model.train_op_lr,
train_model.global_step_lr,
], {
train_model.lr_input: gl_output,
train_model.lr_target: target
})
avg_lr_loss += 0.05 * (lr_loss_d - avg_lr_loss)
else:
generator_input = np_random.rand(FLAGS.batch_size, FLAGS.random_dimension)
target = np.zeros([FLAGS.batch_size])
rl_loss_g, _, step_lr = session.run([
train_model.lr_loss,
train_model.train_op_g,
train_model.global_step_lr
], {
train_model.gl_input: generator_input,
train_model.lr_target: target
})
avg_gr_loss += 0.05 * (rl_loss_g - avg_gr_loss)
if count % FLAGS.print_every == 0:
time_elapsed = time.time() - start_time
print('Regression Logistic: %6d: %d [%5d/%5d], loss_lr/loss_g = %6.8f/%6.7f secs/batch = %.4fs' % (
step_lr, epoch, count, train_reader.length, avg_lr_loss, avg_gr_loss, time_elapsed))
lr_summary = tf.Summary(value=[
tf.Summary.Value(tag="lr_loss", simple_value=avg_lr_loss),
])
summary_writer.add_summary(lr_summary, step_lr)
gr_summary = tf.Summary(value=[
tf.Summary.Value(tag="gr_loss", simple_value=avg_gr_loss),
])
summary_writer.add_summary(gr_summary, step_lr)
train_reader.shuf()
print('Epoch training time:', time.time() - epoch_start_time)
save_as = '%s/lr_epoch%03d_%.4f.model' % (FLAGS.train_dir, epoch, avg_lr_loss)
saver.save(session, save_as)
# saver.save(session, "final_model")
print('Saved model')
flags.DEFINE_integer('max_word_length', 70, 'maximum word length')
flags.DEFINE_integer(
'iteration', 3,
'number of iterations of lr-training before a gl-lr training')
# bookkeeping
flags.DEFINE_integer('seed', 1021, 'random number generator seed')
flags.DEFINE_integer('print_every', 200, 'how often to print current loss')
flags.DEFINE_integer('num_samples', 300, 'how many words to generate')
FLAGS = flags.FLAGS
with tf.Graph().as_default(), tf.Session() as session:
tf.set_random_seed(FLAGS.seed)
np.random.seed(seed=FLAGS.seed)
char_vocab, char_tensors, char_lens, actual_max_word_length = load_data(
FLAGS.data_dir, FLAGS.max_word_length)
# top_domain=".com"
# with open("train.txt","w") as f:
# for i in range(FLAGS.num_samples):
# str_list="abcdefghijklmnopqrstuvwxyz0123456789-"
# input_len=randint(5,20)
# input_str=""
# for j in range(input_len):
# input_str+=str_list[randint(0,len(str_list)-1)]
# input_str+=top_domain
# input_str+='\n'
# f.write(input_str)
# f.write("a"*66+".com"+"\n")
char_vocab_, char_tensors_, char_lens_, actual_max_word_length_ = load_data(
".", FLAGS.max_word_length)
def main(_):
''' Loads trained model and evaluates it on test split '''
if FLAGS.load_model is None:
print('Please specify checkpoint file to load model from')
return -1
if not os.path.exists(FLAGS.load_model + '.meta'):
print('Checkpoint file not found', FLAGS.load_model)
return -1
print('Reading the character vocabulary from the train data')
char_vocab, _, _, max_word_length = load_data(FLAGS.data_dir, 70)
with tf.Graph().as_default(), tf.Session() as session:
# tensorflow seed must be inside graph
tf.set_random_seed(FLAGS.seed)
np.random.seed(seed=FLAGS.seed)
print('Initializing the network graph')
initializer = tf.contrib.layers.xavier_initializer()
''' build inference graph '''
with tf.variable_scope("Model", initializer=initializer):
m = dga_model.inference_graph(
char_vocab_size=char_vocab.size,
char_embed_size=FLAGS.char_embed_size,
batch_size=FLAGS.batch_size,
num_highway_layers=FLAGS.highway_layers,
num_rnn_layers=FLAGS.rnn_layers,
rnn_size=FLAGS.rnn_size,
max_word_length=max_word_length,
kernels=eval(FLAGS.kernels),
kernel_features=eval(FLAGS.kernel_features),
dropout=0,
embed_dimension=FLAGS.embed_dimension)
m.update(
dga_model.decoder_graph(
m.embed_output,
char_vocab_size=char_vocab.size,
batch_size=FLAGS.batch_size,
num_highway_layers=FLAGS.highway_layers,
num_rnn_layers=FLAGS.rnn_layers,
rnn_size=FLAGS.rnn_size,
max_word_length=max_word_length,
kernels=eval(FLAGS.kernels),
kernel_features=eval(FLAGS.kernel_features)))
m.update(
dga_model.genearator_layer(
batch_size=FLAGS.batch_size,
input_dimension=FLAGS.random_dimension,
max_word_length=max_word_length,
embed_dimension=FLAGS.embed_dimension))
# we need global step only because we want to read it from the model
global_step = tf.Variable(0, dtype=tf.int32, name='global_step')
saver = tf.train.Saver()
saver.restore(session, FLAGS.load_model)
print('Loaded model from', FLAGS.load_model, 'saved at global step',
global_step.eval())
output_fname = FLAGS.data_dir + "/output_agd.txt"
print('Generating output domains and saving them to ', output_fname)
with open(output_fname, "w") as outfile:
for i in tqdm(range(FLAGS.num_samples)):
# Select a psuedo-random seed
np_random = np.random.RandomState(i)
pseudo_random_seed = np_random.rand(FLAGS.batch_size,
FLAGS.random_dimension)
# Generater(seed) -> embedding
domain_embedding = session.run(
[m.gl_output], {m.gl_input: pseudo_random_seed})
# Decoder(embedding) -> algorithmically generated domain
agd_ixs = session.run([m.generated_dga],
{m.decoder_input: domain_embedding[0]})
agd = agd_output_to_domain(agd_ixs, char_vocab)
# Save result to file
outfile.write("{}, {}\n".format(i, agd))
print("Done")