def __init__(self, tracker_address, video_name, user_name):
""" Create a new P2PUser. Set the packet size, instantiate the manager,
and establish clients. Currently, the clients are static but will
become dynamic when the tracker is implemented.
"""
self.packet_size = 1000
self.user_name = user_name
self.my_ip = user_name
self.my_port = 0
register_to_tracker_as_user(tracker_address, self.my_ip, self.my_port, video_name)
# Connect to the server
# Cache will get a response when each chunk is downloaded from the server.
# Note that this flag should **NOT** be set for the caches, as the caches
# downloads will be aborted after 8 seconds with no expectation.
# After the cache download period, the files themselves will be checked
# to see what remains to be downloaded from the server.
server_ip_address = retrieve_server_address_from_tracker(tracker_address)
self.server_client = ThreadClient(self, server_ip_address, self.packet_size)
self.server_client.set_respond_RETR(True)
self.tracker_address = tracker_address
self.clients = []
self.num_of_caches = num_of_caches
self.manager = None # TODO: create the manager class to decode/play
self.info_thread = '' # Thread for exchanging information
def update_info(self):
user = self.user
video_name = self.video_name
filename = self.filename
code_param_n = self.code_param_n
code_param_k = self.code_param_k
filename = 'file-' + self.video_name + '.' + str(1)
folder_name = 'video-' + self.video_name + '/' + self.video_name + '.' + str(1) + '.dir/'
inst_CNKS = 'CNKS ' + self.filename
inst_UPDG = 'UPDG '
# self.clients : list of connected guys
T_buffer = CACHE_DOWNLOAD_DURATION + SERVER_DOWNLOAD_DURATION
ct_period = int(T_buffer / T_update_info)
ct_loop = ct_period - 1
clients_copy = []
while True:
if not self.flag:
print '[infoThread.py] Thread terminates'
break
ct_loop += 1
if ct_loop == ct_period:
# Copy self.clients to client_copy
while clients_copy:
each_client = clients_copy.pop()
each_client.put_instruction('QUIT')
for each in self.user.clients:
each_ip = each.address
each_client = ThreadClient(self, each_ip, self.user.packet_size, 1)
clients_copy.append(each_client)
each_client.put_instruction('ID %s' % self.user.user_name)
ct_loop = 0
available_chunks = [0]*len(clients_copy) # available_chunks[i] = cache i's availble chunks
rates = [0]*len(clients_copy) # rates[i] = cache i's offered rate
union_chunks = [] # union of all available indices
for i in range(len(clients_copy)):
client = clients_copy[i]
client.put_instruction(inst_CNKS)
return_str = client.get_response().split('&')
if return_str[0] == '':
available_chunks[i] = []
else:
available_chunks[i] = map(str, return_str[0].split('%'))
for j in range(len(available_chunks[i])):
available_chunks[i][j] = available_chunks[i][j].zfill(2)
rates[i] = int(return_str[1])
union_chunks = list( set(union_chunks) | set(available_chunks[i]) )
## index assignment here
# Assign chunks to cache using cache_chunks_to_request.
if DEBUGGING_MSG:
print '[user.py] Update_info_loop : Rates ', rates
print '[user.py] Update_info_loop : Available chunks', available_chunks
assigned_chunks = cache_chunks_to_request(available_chunks, rates, self.code_param_n, self.code_param_k)
effective_rates = [0]*len(rates)
for i in range(len(rates)):
effective_rates[i] = len(assigned_chunks[i])
chosen_chunks = [j for i in assigned_chunks for j in i]
flag_deficit = int(sum(effective_rates) < code_param_k) # True if user needs more rate from caches
# request assigned chunks
for i in range(len(clients_copy)):
client = clients_copy[i]
print "[user.py] Update_info_loop : [Client " + str(i) + "] flag_deficit: ", flag_deficit, \
", Assigned chunks: ", assigned_chunks[i]
client.put_instruction(inst_UPDG + str(flag_deficit))
sleep(T_update_info)
# Close all connections
while clients_copy:
each_client = clients_copy.pop()
each_client.put_instruction('QUIT')
def download(self, video_name, start_frame):
print '[user.py] P2Puser starts downloading'
connected_caches = []
self.not_connected_caches = not_connected_caches = []
# Connect to the caches
cache_ip_addr = retrieve_caches_address_from_tracker(self.tracker_address, 100, self.user_name)
#cache_ip_addr[0][0] = '[' + cache_ip_addr[0][0] + ']'
self.cache_ip_addr = cache_ip_addr
self.num_of_caches = min(self.num_of_caches, len(cache_ip_addr))
choke_state = 0 # 0 : usual state, 1 : overhead state
choke_ct = 0
for i in range(self.num_of_caches):
each_client = ThreadClient(self, cache_ip_addr[i], self.packet_size, i)
each_client.put_instruction('ID %s' % self.user_name)
self.clients.append(each_client)
connected_caches.append(each_client)
print '[user.py] ', i, 'th connection is CONNECTED : ' , cache_ip_addr[i]
if DEBUG_RYAN:
pdb.set_trace()
for i in range(self.num_of_caches, len(cache_ip_addr)): #Is it not entering this statement here?
if DEBUG_RYAN:
pdb.set_trace()
each_client = ThreadClient(self, cache_ip_addr[i], self.packet_size, i)
each_client.put_instruction('ID %s' % self.user_name)
not_connected_caches.append(each_client)
print '[user.py] ', i, 'th connection is RESERVED: ' , cache_ip_addr[i]
available_chunks = set([])
print '[user.py] putting VLEN', video_name
self.clients[0].put_instruction('VLEN file-%s' % (video_name))
print '[user.py] retrieving VLEN'
vlen_str = self.clients[0].get_response().split('\n')[0]
vlen_items = vlen_str.split('&')
print "VLEN: ", vlen_items
num_frames, code_param_n, code_param_k = int(vlen_items[0]), int(vlen_items[4]), int(vlen_items[5])
base_file_name = video_name + '.mkv'
#turning it into an .mvk also works. Probably should store what kind of file it is server side
#or just make everything .mkv. .MKV is a container file for video, audio, and other stuff.
#Read here for a nice description:
#http://lifehacker.com/5893250/whats-the-difference-between-all-these-video-formats-and-which-one-should-i-use
#base_file_name = video_name + '.mkv'
try:
os.mkdir('video-' + video_name)
except:
pass
# Set internal chunk_size through putting an internal instruction into
# the queue.
base_file = open('video-' + video_name + '/' + base_file_name, 'ab')
base_file_full_path = os.path.abspath('video-' + video_name + '/' + base_file_name)
self.info_thread = infoThread(video_name, code_param_n, code_param_k, self)
self.info_thread.flag = True
self.info_thread.start()
for frame_number in xrange(start_frame, num_frames + 1):
sys.stdout.flush()
effective_rates = [0]*len(self.clients)
assigned_chunks = [0]*len(self.clients)
if frame_number < num_frames: # Usual frames
inst_INTL = 'INTL ' + 'CNKN ' + vlen_items[2] # chunk size of typical frame (not last one)
for client in self.clients:
client.put_instruction(inst_INTL)
self.server_client.put_instruction(inst_INTL)
else: # Last frame
inst_INTL = 'INTL ' + 'CNKN ' + vlen_items[3] # chunk size of last frame
for client in self.clients:
client.put_instruction(inst_INTL)
self.server_client.put_instruction(inst_INTL)
print '[user.py] frame_number : ', frame_number
filename = 'file-' + video_name + '.' + str(frame_number)
# directory for this frame
folder_name = 'video-' + video_name + '/' + video_name + '.' + str(frame_number) + '.dir/'
# get available chunks lists from cache A and B.
inst_CNKS = 'CNKS ' + filename
inst_RETR = 'RETR ' + filename
inst_UPDG = 'UPDG '
inst_NOOP = 'NOOP'
inst_CACHEDATA = 'CACHEDATA '
###### DECIDING WHICH CHUNKS TO DOWNLOAD FROM CACHES: TIME 0 ######
if DEBUG_RYAN:
pdb.set_trace()
available_chunks = [0]*len(self.clients) # available_chunks[i] = cache i's availble chunks
rates = [0]*len(self.clients) # rates[i] = cache i's offered rate
union_chunks = [] # union of all available indices
for i in range(len(self.clients)):
client = self.clients[i]
client.put_instruction(inst_CNKS)
return_str = client.get_response().split('&')
if return_str[0] == '':
available_chunks[i] = []
else:
available_chunks[i] = map(str, return_str[0].split('%'))
for j in range(len(available_chunks[i])):
available_chunks[i][j] = available_chunks[i][j].zfill(2)
rates[i] = int(return_str[1])
union_chunks = list( set(union_chunks) | set(available_chunks[i]) )
## index assignment here
# Assign chunks to cache using cache_chunks_to_request.
print '[user.py] Rates ', rates
print '[user.py] Available chunks', available_chunks
assigned_chunks = cache_chunks_to_request(available_chunks, rates, code_param_n, code_param_k)
effective_rates = [0]*len(rates)
for i in range(len(rates)):
effective_rates[i] = len(assigned_chunks[i])
chosen_chunks = [j for i in assigned_chunks for j in i]
flag_deficit = int(sum(effective_rates) < code_param_k) # True if user needs more rate from caches
list_of_cache_requests = []
# request assigned chunks
for i in range(len(self.clients)):
client = self.clients[i]
client_ip_address = client.address[0] + ':' + str(client.address[1])
print '[user.py] Server_request 2 = "' , assigned_chunks[i] , '"'
client_request_string = '%'.join(assigned_chunks[i]) + '&1'
print "[user.py] [Client " + str(i) + "] flag_deficit: ", flag_deficit, \
", Assigned chunks: ", assigned_chunks[i], \
", Request string: ", client_request_string
if DEBUG_RYAN:
pdb.set_trace()
cachedata_request_string = client_request_string.replace('&1','&' + client_ip_address)
list_of_cache_requests.append(filename+ '.' + cachedata_request_string)
client.put_instruction(inst_UPDG + str(flag_deficit))
client.put_instruction(inst_RETR + '.' + client_request_string)
if False: # WHY IS THIS NOT WORKING?
if not assigned_chunks[i]:
pass
#client.put_instruction(inst_NOOP)
else:
client.put_instruction(inst_RETR + '.' + client_request_string)
###### DECIDING CHUNKS THAT HAVE TO BE DOWNLOADED FROM CACHE: TIME 0 ######
# Before CACHE_DOWNLOAD_DURATION, also start requesting chunks from server.
server_request = []
server_request_2 = []
cdrs = '_' .join(list_of_cache_requests) #cache data request string. Used for parsing inside of server.py's ftp_CACHEDATA
if frame_number < num_frames:
size_of_chunks = vlen_items[2]
else:
size_of_chunks = vlen_items[3]
cdrs = cdrs + '?' + str(size_of_chunks)
chosen_chunks = list(chosen_chunks)
num_chunks_rx_predicted = len(chosen_chunks)
server_request = chunks_to_request(chosen_chunks, range(0, code_param_n), code_param_k - num_chunks_rx_predicted)
num_of_chks_from_server = len(server_request)
if num_of_chks_from_server == 0:
self.server_client.put_instruction(inst_NOOP)
print '[user.py] Caches handling code_param_k chunks, so no request to server. Sending a NOOP'
else:
print '[user.py] Server_request = "' , server_request , '"'
server_request_string = '%'.join(server_request) + '&1'
if DEBUG_RYAN:
pdb.set_trace()
self.server_client.put_instruction(inst_CACHEDATA + cdrs)
self.server_client.put_instruction(inst_RETR + '.' + server_request_string)
if(DEBUGGING_MSG):
print "[user.py] Requesting from server: ", server_request, ", Request string: ", server_request_string
print "[user.py] Sending to server's ftp_CACHEDATA: ", inst_CACHEDATA + cdrs
#update_server_load(tracker_address, video_name, num_of_chks_from_server)
sleep(CACHE_DOWNLOAD_DURATION)
###### STOPPING CACHE DOWNLOADS: TIME 8 (CACHE_DOWNLOAD_DURATION) ######
# immediately stop cache downloads.
for client in self.clients:
try:
client.client.abort()
except:
print "[user.py] Cache connections suddenly aborted. Stopping all download."
return
print "[user.py] Cache connections aborted for frame %d" % (frame_number)
###### REQUEST ADDITIONAL CHUNKS FROM SERVER: TIME 8 (CACHE_DOWNLOAD_DURATION) ######
# Request from server remaining chunks missing
# Look up the download directory and count the downloaded chunks
chunk_nums_rx = chunk_nums_in_frame_dir(folder_name)
if (DEBUGGING_MSG):
print "%d chunks received so far for frame %d: " % (len(chunk_nums_rx), frame_number)
print chunk_nums_rx
# Add the chunks that have already been requested from server
chunk_nums_rx = list (set(chunk_nums_in_frame_dir(folder_name)) | set(server_request))
print "[user.py] chunk_nums_rx", chunk_nums_rx
addtl_server_request = []
num_chunks_rx = len(chunk_nums_rx)
if (num_chunks_rx >= code_param_k):
print "[user.py] No additional chunks to download from the server. Sending a NOOP"
self.server_client.put_instruction(inst_NOOP)
else:
addtl_server_request = chunks_to_request(chunk_nums_rx, range(0, code_param_n), code_param_k - num_chunks_rx)
print "[user.py] addtl_server_requests", addtl_server_request
if addtl_server_request:
addtl_server_request_string = '%'.join(addtl_server_request) + '&1' # The last digit '1' means 'I am user'
# server should always be set with flag_deficit = 0 (has all chunks)
self.server_client.put_instruction(inst_RETR + '.' + addtl_server_request_string)
if(DEBUGGING_MSG):
print "[user.py] Requesting from server: ", addtl_server_request
elif (DEBUGGING_MSG):
print "No unique chunks from server requested."
###### WAIT FOR CHUNKS FROM SERVER TO FINISH DOWNLOADING: TIME 10 ######
sleep(SERVER_DOWNLOAD_DURATION)
if (DEBUGGING_MSG):
print "[user.py] Waiting to receive all elements from server."
if frame_number > start_frame and (server_request or addtl_server_request) and VLC_PLAYER_USE:
# Need to pause it!
self.VLC_pause_video()
if server_request:
resp_RETR = self.server_client.get_response()
parsed_form = parse_chunks(resp_RETR)
fname, framenum, chunks, user_or_cache = parsed_form
print "[user.py] Downloaded chunks from server: ", chunks
if addtl_server_request:
resp_RETR = self.server_client.get_response()
parsed_form = parse_chunks(resp_RETR)
fname, framenum, chunks, user_or_cache = parsed_form
print "[user.py] Downloaded chunks from server: ", chunks
# Now play it
if frame_number > start_frame and (server_request or addtl_server_request) and VLC_PLAYER_USE:
self.VLC_pause_video()
chunk_nums = chunk_nums_in_frame_dir(folder_name)
num_chunks_rx = len(chunk_nums)
if num_chunks_rx >= code_param_k and DEBUGGING_MSG:
print "[user.py] Received", code_param_k, "packets"
else:
print "[user.py] Did not receive", code_param_k, "packets for this frame."
# abort the connection to the server
self.server_client.client.abort()
# put together chunks into single frame; then concatenate onto original file.
print 'about to decode...'
chunksList = chunk_files_in_frame_dir(folder_name)
if frame_number != start_frame:
print 'size of base file:', os.path.getsize('video-' + video_name + '/' + base_file_name)
print 'trying to decode'
filefec.decode_from_files(base_file, chunksList)
print 'decoded. Size of base file =', os.path.getsize('video-' + video_name + '/' + base_file_name)
if frame_number == 1 and VLC_PLAYER_USE:
self.VLC_empty_list()
self.VLC_start_video(base_file_full_path)
if USER_TOPOLOGY_UPDATE:
if choke_state == 0: # Normal state
print '[user.py] Normal state : ', choke_ct
choke_ct += 1
if choke_ct == T_choke:
choke_ct = 0
if len(not_connected_caches) == 0:
pass
else: # Add a new cache temporarily
new_cache_index = random.sample(range(len(not_connected_caches)), 1)
if new_cache_index >= 0:
new_cache = not_connected_caches[new_cache_index[0]]
self.clients.append(new_cache)
connected_caches.append(new_cache)
not_connected_caches.remove(new_cache)
print '[user.py] Topology Update : Temporarily added ', new_cache.address
choke_state = 1 # Now, move to transitional state
choke_ct = 0
print '[user.py] Topology Update : Now the state is changed to overhead staet'
#print '[user.py]', connected_caches, not_connected_caches, self.clients
print '[user.py] conneced caches', self.clients
elif choke_state == 1: # Overhead state
print '[user.py] Overhead state : ', choke_ct
choke_ct += 1
if choke_ct == T_choke2: # Temporary period to spend with temporarily added node
rate_vector = [0] * len(self.clients)
p_vector = [0] * len(self.clients)
for i in range(len(self.clients)):
rate_vector[i] = len(assigned_chunks[i])
p_vector[i] = math.exp( -eps_choke * rate_vector[i])
p_sum = sum(p_vector)
for i in range(len(self.clients)):
p_vector[i] /= p_sum
cdf = [(0,0)] * len(self.clients)
cdf[0] = (0, 0)
for i in range(1, len(self.clients)):
cdf[i] = (i, cdf[i-1][1] + p_vector[i-1])
print '[user.py] cdf :', cdf
client_index = max(i for r in [random.random()] for i,c in cdf if c <= r) # http://stackoverflow.com/questions/4265988/generate-random-numbers-with-a-given-numerical-distribution
removed_cache = self.clients[client_index]
#removed_cache.put_instruction('QUIT')
self.clients.remove(removed_cache)
connected_caches.remove(removed_cache)
not_connected_caches.append(removed_cache)
print '[user.py] Topology Update : ', removed_cache.address, 'is chocked.'
choke_state = 0 # Now, move to normal state
choke_ct = 0
class P2PUser():
#def __init__(self, tracker_address, video_name, packet_size):
def __init__(self, tracker_address, video_name, user_name):
""" Create a new P2PUser. Set the packet size, instantiate the manager,
and establish clients. Currently, the clients are static but will
become dynamic when the tracker is implemented.
"""
self.packet_size = 1000
self.user_name = user_name
self.my_ip = user_name
self.my_port = 0
register_to_tracker_as_user(tracker_address, self.my_ip, self.my_port, video_name)
# Connect to the server
# Cache will get a response when each chunk is downloaded from the server.
# Note that this flag should **NOT** be set for the caches, as the caches
# downloads will be aborted after 8 seconds with no expectation.
# After the cache download period, the files themselves will be checked
# to see what remains to be downloaded from the server.
server_ip_address = retrieve_server_address_from_tracker(tracker_address)
self.server_client = ThreadClient(server_ip_address, self.packet_size)
self.server_client.set_respond_RETR(True)
self.tracker_address = tracker_address
self.clients = []
self.num_of_caches = num_of_caches
self.manager = None # TODO: create the manager class to decode/play
def VLC_start_video(self, video_path):
# Put the file into the queue and play it
url = 'http://127.0.0.1:8080/requests/status.xml?command=in_play&input=file://'
url = url + video_path
print '[user.py] ', url
urllib2.urlopen(url).read()
def VLC_pause_video(self):
# Pause or play it
url = 'http://127.0.0.1:8080/requests/status.xml?command=pl_pause'
print '[user.py] ', url
urllib2.urlopen(url).read()
def play(self, video_name, frame_number):
""" Starts playing the video as identified by either name or number and
begins handling the data connections necessary to play the video,
starting at frame_number (the 10-second section of time within the
vid).
"""
# inform the web browser we have started playing
if not self.manager.playing():
self.manager.start_playing()
# TODO: add decoding.
def connected_caches():
f = open(config_file)
fs = csv.reader(f, delimiter = ' ')
for row in fs:
if (DEBUGGING_MSG): print '[server.py] Loading movie : ', row
movie_name = row[0]
self.movies_LUT[movie_name] = (int(row[1]), int(row[2]), int(row[3]), int(row[4]), int(row[5]), int(row[6]))
def download(self, video_name, start_frame):
connected_caches = []
not_connected_caches = []
# Connect to the caches
cache_ip_addr = retrieve_caches_address_from_tracker(self.tracker_address, 100, self.user_name)
self.cache_ip_addr = cache_ip_addr
#connected_caches = set([])
self.num_of_caches = min(self.num_of_caches, len(cache_ip_addr))
#connected_caches_index = [0] * self.num_of_caches
#not_connected_caches = set(range(len(cache_ip_addr)))
choke_state = 0 # 0 : usual state, 1 : overhead state
choke_ct = 0
for i in range(self.num_of_caches):
each_client = ThreadClient(cache_ip_addr[i], self.packet_size, i)
self.clients.append(each_client)
connected_caches.append(each_client)
print '[user.py] ', i, 'th connection is CONNECTED : ' , cache_ip_addr[i]
for i in range(self.num_of_caches, len(cache_ip_addr)):
each_client = (cache_ip_addr[i], self.packet_size, i)
not_connected_caches.append(each_client)
print '[user.py] ', i, 'th connection is RESERVED: ' , cache_ip_addr[i]
available_chunks = set([])
self.clients[0].put_instruction('VLEN file-%s' % (video_name))
vlen_str = self.clients[0].get_response().split('\n')[0]
vlen_items = vlen_str.split('&')
print "VLEN: ", vlen_items
num_frames = int(vlen_items[0])
base_file_name = video_name + '.flv'
try:
os.mkdir('video-' + video_name)
except:
pass
# Set internal chunk_size through putting an internal instruction into
# the queue.
base_file = open('video-' + video_name + '/' + base_file_name, 'ab')
base_file_full_path = os.path.abspath('video-' + video_name + '/' + base_file_name)
frame_number = 1
for i in range(30):
sys.stdout.flush()
effective_rates = [0]*len(self.clients)
assigned_chunks = [0]*len(self.clients)
if frame_number < num_frames: # Usual frames
inst_INTL = 'INTL ' + 'CNKN ' + vlen_items[2] # chunk size of typical frame (not last one)
for client in self.clients:
client.put_instruction(inst_INTL)
self.server_client.put_instruction(inst_INTL)
else: # Last frame
inst_INTL = 'INTL ' + 'CNKN ' + vlen_items[3] # chunk size of last frame
for client in self.clients:
client.put_instruction(inst_INTL)
self.server_client.put_instruction(inst_INTL)
print '[user.py] frame_number : ', frame_number
filename = 'file-' + video_name + '.' + str(frame_number)
# directory for this frame
folder_name = 'video-' + video_name + '/' + video_name + '.' + str(frame_number) + '.dir/'
# FAKE USER is deleting all chunks and receiving again again
chunk_delete_all_in_frame_dir(folder_name)
print '[user.py] deleting successfully...'
# get available chunks lists from cache A and B.
inst_CNKS = 'CNKS ' + filename
inst_RETR = 'RETR ' + filename
inst_NOOP = 'NOOP'
###### DECIDING WHICH CHUNKS TO DOWNLOAD FROM CACHES: TIME 0 ######
available_chunks = [0]*len(self.clients) # available_chunks[i] = cache i's availble chunks
rates = [0]*len(self.clients) # rates[i] = cache i's offered rate
union_chunks = [] # union of all available indices
for i in range(len(self.clients)):
client = self.clients[i]
client.put_instruction(inst_CNKS)
return_str = client.get_response().split('&')
if return_str[0] == '':
available_chunks[i] = []
else:
available_chunks[i] = map(str, return_str[0].split('%'))
for j in range(len(available_chunks[i])):
available_chunks[i][j] = available_chunks[i][j].zfill(2)
rates[i] = int(return_str[1])
union_chunks = list( set(union_chunks) | set(available_chunks[i]) )
## index assignment here
# Assign chunks to cache using cache_chunks_to_request.
print '[user.py] Rates ', rates
print '[user.py] Available chunks', available_chunks
assigned_chunks = cache_chunks_to_request(available_chunks, rates)
effective_rates = [0]*len(rates)
for i in range(len(rates)):
effective_rates[i] = len(assigned_chunks[i])
chosen_chunks = [j for i in assigned_chunks for j in i]
flag_deficit = (sum(effective_rates) < 20) # True if user needs more rate from caches
# request assigned chunks
for i in range(len(self.clients)):
client = self.clients[i]
client_request_string = '%'.join(assigned_chunks[i])
client_request_string = client_request_string + '&' + str(int(flag_deficit))
print "[user.py] [Client " + str(i) + "] flag_deficit: ", int(flag_deficit), \
", Assigned chunks: ", assigned_chunks[i], \
", Request string: ", client_request_string
client.put_instruction(inst_RETR + '.' + client_request_string)
###### DECIDING CHUNKS THAT HAVE TO BE DOWNLOADED FROM CACHE: TIME 0 ######
# Before CACHE_DOWNLOAD_DURATION, also start requesting chunks from server.
server_request = []
chosen_chunks = list(chosen_chunks)
num_chunks_rx_predicted = len(chosen_chunks)
server_request = chunks_to_request(chosen_chunks, range(0, 40), 20 - num_chunks_rx_predicted)
num_of_chks_from_server = len(server_request)
if num_of_chks_from_server == 0:
self.server_client.put_instruction(inst_NOOP)
print '[user.py] Caches handling 20 chunks, so no request to server. Sending a NOOP'
else:
server_request_string = '%'.join(server_request)
server_request_string = server_request_string + '&' + str(1) ## DOWNLOAD FROM SERVER : binary_g = 1
self.server_client.put_instruction(inst_RETR + '.' + server_request_string)
if(DEBUGGING_MSG):
print "[user.py] Requesting from server: ", server_request, ", Request string: ", server_request_string
#update_server_load(tracker_address, video_name, num_of_chks_from_server)
sleep(CACHE_DOWNLOAD_DURATION)
###### STOPPING CACHE DOWNLOADS: TIME 8 (CACHE_DOWNLOAD_DURATION) ######
# immediately stop cache downloads.
for client in self.clients:
try:
client.client.abort()
except:
print "[user.py] Cache connections suddenly aborted. Stopping all download."
return
print "[user.py] Cache connections aborted for frame %d" % (frame_number)
###### REQUEST ADDITIONAL CHUNKS FROM SERVER: TIME 8 (CACHE_DOWNLOAD_DURATION) ######
# Request from server remaining chunks missing
# Look up the download directory and count the downloaded chunks
chunk_nums_rx = chunk_nums_in_frame_dir(folder_name)
if (DEBUGGING_MSG):
print "%d chunks received so far for frame %d: " % (len(chunk_nums_rx), frame_number)
print chunk_nums_rx
# Add the chunks that have already been requested from server
chunk_nums_rx = list (set(chunk_nums_in_frame_dir(folder_name)) | set(server_request))
addtl_server_request = []
num_chunks_rx = len(chunk_nums_rx)
if (num_chunks_rx >= 20):
print "[user.py] No additional chunks to download from the server. Sending a NOOP"
self.server_client.put_instruction(inst_NOOP)
else:
addtl_server_request = chunks_to_request(chunk_nums_rx, range(0, 40), 20 - num_chunks_rx)
if addtl_server_request:
addtl_server_request_string = '%'.join(addtl_server_request)
# server should always be set with flag_deficit = 0 (has all chunks)
addtl_server_request_string = addtl_server_request_string + '&' + str(1) ## DOWNLOAD FROM SERVER : binary_g = 1
self.server_client.put_instruction(inst_RETR + '.' + addtl_server_request_string)
if(DEBUGGING_MSG):
print "[user.py] Requesting from server: ", addtl_server_request
elif (DEBUGGING_MSG):
print "No unique chunks from server requested."
###### WAIT FOR CHUNKS FROM SERVER TO FINISH DOWNLOADING: TIME 10 ######
sleep(SERVER_DOWNLOAD_DURATION)
if (DEBUGGING_MSG):
print "[user.py] Waiting to receive all elements from server."
if frame_number > start_frame and (server_request or addtl_server_request) and VLC_PLAYER_USE:
# Need to pause it!
self.VLC_pause_video()
if server_request:
resp_RETR = self.server_client.get_response()
parsed_form = parse_chunks(resp_RETR)
fname, framenum, binary_g, chunks = parsed_form
print "[user.py] Downloaded chunks from server: ", chunks
if addtl_server_request:
resp_RETR = self.server_client.get_response()
parsed_form = parse_chunks(resp_RETR)
fname, framenum, binary_g, chunks = parsed_form
print "[user.py] Downloaded chunks from server: ", chunks
# Now play it
if frame_number > start_frame and (server_request or addtl_server_request) and VLC_PLAYER_USE:
self.VLC_pause_video()
chunk_nums = chunk_nums_in_frame_dir(folder_name)
num_chunks_rx = len(chunk_nums)
if num_chunks_rx >= 20 and DEBUGGING_MSG:
print "[user.py] Received 20 packets"
else:
print "[user.py] Did not receive 20 packets for this frame."
# abort the connection to the server
self.server_client.client.abort()
# put together chunks into single frame; then concatenate onto original file.
print 'about to decode...'
chunksList = chunk_files_in_frame_dir(folder_name)
if frame_number != start_frame:
print 'size of base file:', os.path.getsize('video-' + video_name + '/' + base_file_name)
print 'trying to decode'
#filefec.decode_from_files(base_file, chunksList)
print 'decoded. Size of base file =', os.path.getsize('video-' + video_name + '/' + base_file_name)
if frame_number == 1 and VLC_PLAYER_USE:
self.VLC_start_video(base_file_full_path)
if USER_TOPOLOGY_UPDATE:
if choke_state == 0: # Normal state
print '[user.py] Normal state : ', choke_ct
choke_ct += 1
if choke_ct == T_choke:
choke_ct = 0
if len(not_connected_caches) == 0:
pass
else: # Add a new cache temporarily
new_cache_index = random.sample(range(len(not_connected_caches)), 1)
if new_cache_index >= 0:
new_cache_meta = not_connected_caches[new_cache_index[0]]
new_cache = ThreadClient(*new_cache_meta)
self.clients.append(new_cache)
connected_caches.append(new_cache)
not_connected_caches.remove(new_cache_meta)
print '[user.py] Topology Update : Temporarily added ', new_cache.address
choke_state = 1 # Now, move to transitional state
choke_ct = 0
print '[user.py] Topology Update : Now the state is changed to overhead staet'
#print '[user.py]', connected_caches, not_connected_caches, self.clients
print '[user.py] conneced caches', self.clients
elif choke_state == 1: # Overhead state
print '[user.py] Overhead state : ', choke_ct
choke_ct += 1
if choke_ct == T_choke2: # Temporary period to spend with temporarily added node
rate_vector = [0] * len(self.clients)
p_vector = [0] * len(self.clients)
for i in range(len(self.clients)):
rate_vector[i] = len(assigned_chunks[i])
p_vector[i] = math.exp( -eps_choke * rate_vector[i])
# >>> cdf = [(1, 0), (2,0.1), (3,0.15), (4,0.2), (5,0.4), (6,0.8)]
p_sum = sum(p_vector)
for i in range(len(self.clients)):
p_vector[i] /= p_sum
cdf = [(0,0)] * len(self.clients)
cdf[0] = (0, 0)
for i in range(1, len(self.clients)):
cdf[i] = (i, cdf[i-1][1] + p_vector[i-1])
print '[user.py] cdf :', cdf
client_index = max(i for r in [random.random()] for i,c in cdf if c <= r) # http://stackoverflow.com/questions/4265988/generate-random-numbers-with-a-given-numerical-distribution
# client_index = rate_vector.index(min(rate_vector))
removed_cache = self.clients[client_index]
removed_cache.put_instruction('QUIT')
self.clients.remove(removed_cache)
connected_caches.remove(removed_cache)
new_cache_meta = (self.cache_ip_addr[client_index], 1000, client_index)
not_connected_caches.append(new_cache_meta)
print '[user.py] Topology Update : ', removed_cache.address, 'is chocked.'
choke_state = 0 # Now, move to normal state
choke_ct = 0
def disconnect(self, tracker_address, video_name, user_name):
for client in self.clients:
client.put_instruction('QUIT')
self.server_client.put_instruction('QUIT')
print "[user.py] Closed all connections."
my_ip = user_name
my_port = 0
my_video_name = video_name
deregister_to_tracker_as_user(tracker_address, my_ip, my_port, video_name)
print "[user.py] BYE"
sys.stdout.flush()
class P2PUser():
def __init__(self, tracker_address, video_name, user_name, session = None):
""" Create a new P2PUser. Set the packet size, instantiate the manager,
and establish clients. Currently, the clients are static but will
become dynamic when the tracker is implemented.
"""
self.packet_size = 1000
self.user_name = user_name
self.my_ip = user_name
self.my_port = 0
register_to_tracker_as_user(tracker_address, self.my_ip, self.my_port, video_name,session)
# Connect to the server
# Cache will get a response when each chunk is downloaded from the server.
# Note that this flag should **NOT** be set for the caches, as the caches
# downloads will be aborted after 8 seconds with no expectation.
# After the cache download period, the files themselves will be checked
# to see what remains to be downloaded from the server.
server_ip_address = retrieve_server_address_from_tracker(tracker_address, session)
self.server_client = ThreadClient(self, server_ip_address, self.packet_size)
self.server_client.set_respond_RETR(True)
self.tracker_address = tracker_address
self.clients = []
self.num_of_caches = num_of_caches
self.manager = None # TODO: create the manager class to decode/play
self.info_thread = '' # Thread for exchanging information
def VLC_start_video(self, video_path):
# Put the file into the queue and play it
url = 'http://127.0.0.1:8081/requests/status.xml?command=in_play&input=file://'
url = url + video_path
urllib2.urlopen(url).read()
def VLC_pause_video(self):
# Pause or play it
url = 'http://127.0.0.1:8081/requests/status.xml?command=pl_pause'
urllib2.urlopen(url).read()
def VLC_empty_list(self):
# Empty playlist
url = 'http://127.0.0.1:8081/requests/status.xml?command=pl_empty'
urllib2.urlopen(url).read()
def play(self, video_name, frame_number):
""" Starts playing the video as identified by either name or number and
begins handling the data connections necessary to play the video,
starting at frame_number (the 10-second section of time within the
vid).
"""
# inform the web browser we have started playing
if not self.manager.playing():
self.manager.start_playing()
# TODO: add decoding.
def connected_caches():
f = open(config_file)
fs = csv.reader(f, delimiter = ' ')
for row in fs:
if (DEBUGGING_MSG): print '[server.py] Loading movie : ', row
movie_name = row[0]
self.movies_LUT[movie_name] = (int(row[1]), int(row[2]), int(row[3]), int(row[4]), int(row[5]), int(row[6]))
def download(self, video_name, start_frame, session=None):
global global_frame_number
print '[user.py] P2Puser starts downloading'
connected_caches = []
self.not_connected_caches = not_connected_caches = []
inst_SENDPORT = 'SENDPORT '
if DEBUG_FULL:
pdb.set_trace() #str(self.my_port) self.my_ip video_name user
self.server_client.put_instruction(inst_SENDPORT + str(self.my_port) + ' ' + self.my_ip + ' ' + video_name + ' user')
# Connect to the caches
cache_ip_addr = retrieve_caches_address_from_tracker(self.tracker_address, 100, self.user_name, session = session)
self.cache_ip_addr = cache_ip_addr
self.num_of_caches = min(self.num_of_caches, len(cache_ip_addr))
choke_state = 0 # 0 : usual state, 1 : overhead state
choke_ct = 0
for i in range(self.num_of_caches):
each_client = ThreadClient(self, cache_ip_addr[i], self.packet_size, i)
each_client.put_instruction('ID %s' % self.user_name)
self.clients.append(each_client)
connected_caches.append(each_client)
print '[user.py] ', i, 'th connection is CONNECTED : ' , cache_ip_addr[i]
if DEBUG_FULL:
pdb.set_trace()
for i in range(self.num_of_caches, len(cache_ip_addr)): #Is it not entering this statement here?
if DEBUG_FULL:
pdb.set_trace()
each_client = ThreadClient(self, cache_ip_addr[i], self.packet_size, i)
each_client.put_instruction('ID %s' % self.user_name)
not_connected_caches.append(each_client)
print '[user.py] ', i, 'th connection is RESERVED: ' , cache_ip_addr[i]
available_chunks = set([])
print '[user.py] putting VLEN', video_name
self.clients[0].put_instruction('VLEN file-%s' % (video_name))
print '[user.py] retrieving VLEN'
vlen_str = self.clients[0].get_response().split('\n')[0]
vlen_items = vlen_str.split('&')
print "VLEN: ", vlen_items
num_frames, code_param_n, code_param_k = int(vlen_items[0]), int(vlen_items[4]), int(vlen_items[5])
base_file_name = video_name + '.mkv'
#turning it into an .mvk also works. Probably should store what kind of file it is server side
#or just make everything .mkv. .MKV is a container file for video, audio, and other stuff.
#Read here for a nice description:
#http://lifehacker.com/5893250/whats-the-difference-between-all-these-video-formats-and-which-one-should-i-use
#base_file_name = video_name + '.mkv'
try:
os.mkdir('video-' + video_name)
except:
pass
# Set internal chunk_size through putting an internal instruction into
# the queue.
base_file = open('video-' + video_name + '/' + base_file_name, 'ab')
base_file_full_path = os.path.abspath('video-' + video_name + '/' + base_file_name)
self.info_thread = infoThread(video_name, code_param_n, code_param_k, self)
self.info_thread.flag = True
self.info_thread.start()
for frame_number in range(start_frame, num_frames + 1):
global_frame_number = frame_number
sys.stdout.flush()
effective_rates = [0]*len(self.clients)
assigned_chunks = [0]*len(self.clients)
if frame_number < num_frames: # Usual frames
inst_INTL = 'INTL ' + 'CNKN ' + vlen_items[2] # chunk size of typical frame (not last one)
for client in self.clients:
client.put_instruction(inst_INTL)
self.server_client.put_instruction(inst_INTL)
else: # Last frame
inst_INTL = 'INTL ' + 'CNKN ' + vlen_items[3] # chunk size of last frame
for client in self.clients:
client.put_instruction(inst_INTL)
self.server_client.put_instruction(inst_INTL)
print '[cache.py -debug] Requesting frame =================='
print '[user.py -debug] current_time =', strftime("%Y-%m-%d %H:%M:%S")
print '[user.py] frame_number requesting: ', frame_number
filename = 'file-' + video_name + '.' + str(frame_number)
# directory for this frame
folder_name = 'video-' + video_name + '/' + video_name + '.' + str(frame_number) + '.dir/'
# get available chunks lists from cache A and B.
inst_CNKS = 'CNKS ' + filename
inst_RETR = 'RETR ' + filename
inst_UPDG = 'UPDG '
inst_NOOP = 'NOOP'
inst_CACHEDATA = 'CACHEDATA '
###### DECIDING WHICH CHUNKS TO DOWNLOAD FROM CACHES: TIME 0 ######
#if DEBUG_FULL:
##
available_chunks = [0]*len(self.clients) # available_chunks[i] = cache i's availble chunks
rates = [0]*len(self.clients) # rates[i] = cache i's offered rate
union_chunks = [] # union of all available indices
for i in range(len(self.clients)):
client = self.clients[i]
client.put_instruction(inst_CNKS)
return_str = client.get_response().split('&')
if return_str[0] == '':
available_chunks[i] = []
else:
available_chunks[i] = map(str, return_str[0].split('%'))
for j in range(len(available_chunks[i])):
available_chunks[i][j] = available_chunks[i][j].zfill(2)
rates[i] = int(return_str[1])
union_chunks = list( set(union_chunks) | set(available_chunks[i]) )
## index assignment here
# Assign chunks to cache using cache_chunks_to_request.
print '[user.py] Cache returned rates ', rates
print '[user.py] Cache returned available chunks', available_chunks
assigned_chunks = cache_chunks_to_request(available_chunks, rates, code_param_n, code_param_k)
print '[user.py] Assigned chunks:', assigned_chunks
effective_rates = [0]*len(rates)
for i in range(len(rates)):
effective_rates[i] = len(assigned_chunks[i])
print '[user.py] effective rates: ', effective_rates
chosen_chunks = [j for i in assigned_chunks for j in i]
print '[user.py] chosen chunks: ', chosen_chunks
flag_deficit = int(sum(effective_rates) < code_param_k) # True if user needs more rate from caches
list_of_cache_requests = []
# request assigned chunks
for i in range(len(self.clients)):
client = self.clients[i]
client_ip_address = client.address[0] + '@' + str(client.address[1])
print '[user.py] Server_request (to cache) = "' , assigned_chunks[i] , '"'
client_request_string = '%'.join(assigned_chunks[i]) + '&1'
print "[user.py] [Client " + str(i) + "] flag_deficit: ", flag_deficit, \
", Assigned chunks: ", assigned_chunks[i], \
", Request string: ", client_request_string
if DEBUG_FULL:
pdb.set_trace()
cachedata_request_string = client_request_string.replace('&1','&' + client_ip_address)
list_of_cache_requests.append(filename+ '.' + cachedata_request_string)
client.put_instruction(inst_UPDG + str(flag_deficit))
client.put_instruction(inst_RETR + '.' + client_request_string)
if False: # WHY IS THIS NOT WORKING?
if not assigned_chunks[i]:
pass
#client.put_instruction(inst_NOOP)
else:
client.put_instruction(inst_RETR + '.' + client_request_string)
###### DECIDING CHUNKS THAT HAVE TO BE DOWNLOADED FROM CACHE: TIME 0 ######
# Before CACHE_DOWNLOAD_DURATION, also start requesting chunks from server.
server_request = []
server_request_2 = []
#cdrs = '_' .join(list_of_cache_requests) #cache data request string. Used for parsing inside of server.py's ftp_CACHEDATA
if frame_number < num_frames:
size_of_chunks = vlen_items[2]
else:
size_of_chunks = vlen_items[3]
#cdrs = cdrs + '?' + str(size_of_chunks)
#cdrs = cdrs + '_' + self.user_name
chosen_chunks = list(chosen_chunks)
num_chunks_rx_predicted = len(chosen_chunks)
server_request = chunks_to_request(chosen_chunks, range(0, code_param_n), code_param_k - num_chunks_rx_predicted)
num_of_chks_from_server = len(server_request)
##
#UPLOAD SERVER CHUNKS TO THE GUI
server_ip_address = self.server_client.address[0] + '@' + str(self.server_client.address[1])
server_chunk_string = '%' .join(server_request)
srs = filename + '.' + server_chunk_string + '&' + server_ip_address
list_of_cache_requests.insert(0,srs)
#END UPLOAD SERVER CHUNKS TO THE GUI
##
cdrs = '_' .join(list_of_cache_requests)
cdrs = cdrs + '?' + str(size_of_chunks)
cdrs = cdrs + '_' + self.user_name
if num_of_chks_from_server == 0:
self.server_client.put_instruction(inst_CACHEDATA + cdrs)
self.server_client.put_instruction(inst_NOOP)
print '[user.py] Caches handling code_param_k chunks, so no request to server. Sending a NOOP'
else:
print '[user.py] Server_request (to server) = "' , server_request , '"'
server_request_string = '%'.join(server_request) + '&1'
#if DEBUG_FULL:
#pdb.set_trace()
self.server_client.put_instruction(inst_CACHEDATA + cdrs)
self.server_client.put_instruction(inst_RETR + '.' + server_request_string)
if(DEBUGGING_MSG):
print "[user.py] Requesting from server: ", server_request, ", Request string: ", server_request_string
print "[user.py] Sending to server's ftp_CACHEDATA: ", inst_CACHEDATA + cdrs
#update_server_load(tracker_address, video_name, num_of_chks_from_server)
sleep(CACHE_DOWNLOAD_DURATION)
###### STOPPING CACHE DOWNLOADS: TIME 8 (CACHE_DOWNLOAD_DURATION) ######
# immediately stop cache downloads.
for client in self.clients:
try:
##
client.client.abort()
except: #I think should be EOFError
#e = sys.exc_info()[0]
##
print sys.exc_info()[0]
print "[user.py] Cache connections suddenly aborted. Stopping all download."
self.clients.remove(client)
return
print "[user.py] Cache connections aborted for frame %d" % (frame_number)
###### REQUEST ADDITIONAL CHUNKS FROM SERVER: TIME 8 (CACHE_DOWNLOAD_DURATION) ######
# Request from server remaining chunks missing
# Look up the download directory and count the downloaded chunks
chunk_nums_rx = chunk_nums_in_frame_dir(folder_name)
if (DEBUGGING_MSG):
print "%d chunks received so far for frame %d: " % (len(chunk_nums_rx), frame_number)
print chunk_nums_rx
# Add the chunks that have already been requested from server
chunk_nums_rx = list (set(chunk_nums_in_frame_dir(folder_name)) | set(server_request))
print "[user.py] chunk_nums_rx", chunk_nums_rx
addtl_server_request = []
num_chunks_rx = len(chunk_nums_rx)
if (num_chunks_rx >= code_param_k):
print "[user.py] No additional chunks to download from the server. Sending a NOOP"
self.server_client.put_instruction(inst_NOOP)
else:
addtl_server_request = chunks_to_request(chunk_nums_rx, range(0, code_param_n), code_param_k - num_chunks_rx)
print "[user.py] addtl_server_requests", addtl_server_request
if addtl_server_request:
addtl_server_request_string = '%'.join(addtl_server_request) + '&1' # The last digit '1' means 'I am user'
# server should always be set with flag_deficit = 0 (has all chunks)
self.server_client.put_instruction(inst_RETR + '.' + addtl_server_request_string)
if(DEBUGGING_MSG):
print "[user.py] Requesting from server: ", addtl_server_request
elif (DEBUGGING_MSG):
print "No unique chunks from server requested."
###### WAIT FOR CHUNKS FROM SERVER TO FINISH DOWNLOADING: TIME 10 ######
sleep(SERVER_DOWNLOAD_DURATION)
if (DEBUGGING_MSG):
print "[user.py] Waiting to receive all elements from server."
if frame_number > start_frame and (server_request or addtl_server_request) and VLC_PLAYER_USE:
# Need to pause it!
self.VLC_pause_video()
if server_request:
resp_RETR = self.server_client.get_response()
parsed_form = parse_chunks(resp_RETR)
fname, framenum, chunks, user_or_cache = parsed_form
print "[user.py] Downloaded chunks from server: ", chunks
if addtl_server_request:
resp_RETR = self.server_client.get_response()
parsed_form = parse_chunks(resp_RETR)
fname, framenum, chunks, user_or_cache = parsed_form
print "[user.py] Downloaded chunks from server: ", chunks
# Now play it
if frame_number > start_frame and (server_request or addtl_server_request) and VLC_PLAYER_USE:
self.VLC_pause_video()
chunk_nums = chunk_nums_in_frame_dir(folder_name)
num_chunks_rx = len(chunk_nums)
if num_chunks_rx >= code_param_k:
print "[user.py] Received", code_param_k, "packets, that is enough."
else:
print "[user.py] Did not receive", code_param_k, "packets for this frame, received: ", num_chunks_rx
# abort the connection to the server
self.server_client.client.abort()
# put together chunks into single frame; then concatenate onto original file.
print 'about to decode...'
chunksList = chunk_files_in_frame_dir(folder_name)
if frame_number != start_frame:
print 'size of base file:', os.path.getsize('video-' + video_name + '/' + base_file_name)
print 'trying to decode'
filefec.decode_from_files(base_file, chunksList)
print 'decoded. Size of base file =', os.path.getsize('video-' + video_name + '/' + base_file_name)
if frame_number == 1 and VLC_PLAYER_USE:
self.VLC_empty_list()
self.VLC_start_video(base_file_full_path)
if USER_TOPOLOGY_UPDATE:
if choke_state == 0: # Normal state
print '[user.py] Normal state : ', choke_ct
choke_ct += 1
if choke_ct == T_choke:
choke_ct = 0
if len(not_connected_caches) == 0:
pass
else: # Add a new cache temporarily
new_cache_index = random.sample(range(len(not_connected_caches)), 1)
if new_cache_index >= 0:
new_cache = not_connected_caches[new_cache_index[0]]
self.clients.append(new_cache)
connected_caches.append(new_cache)
not_connected_caches.remove(new_cache)
print '[user.py] Topology Update : Temporarily added ', new_cache.address
choke_state = 1 # Now, move to transitional state
choke_ct = 0
print '[user.py] Topology Update : Now the state is changed to overhead staet'
#print '[user.py]', connected_caches, not_connected_caches, self.clients
print '[user.py -debug] connected caches', self.clients
for c in range(len(self.clients)):
print '[user.py -debug] cache addressaddress', self.clients[c].address
elif choke_state == 1: # Overhead state
print '[user.py] Overhead state : ', choke_ct
choke_ct += 1
if choke_ct == T_choke2: # Temporary period to spend with temporarily added node
rate_vector = [0] * len(self.clients)
p_vector = [0] * len(self.clients)
for i in range(len(self.clients)):
rate_vector[i] = len(assigned_chunks[i])
p_vector[i] = math.exp( -eps_choke * rate_vector[i])
p_sum = sum(p_vector)
for i in range(len(self.clients)):
p_vector[i] /= p_sum
cdf = [(0,0)] * len(self.clients)
cdf[0] = (0, 0)
for i in range(1, len(self.clients)):
cdf[i] = (i, cdf[i-1][1] + p_vector[i-1])
print '[user.py] cdf :', cdf
client_index = max(i for r in [random.random()] for i,c in cdf if c <= r) # http://stackoverflow.com/questions/4265988/generate-random-numbers-with-a-given-numerical-distribution
removed_cache = self.clients[client_index]
#removed_cache.put_instruction('QUIT')
self.clients.remove(removed_cache)
connected_caches.remove(removed_cache)
not_connected_caches.append(removed_cache)
print '[user.py] Topology Update : ', removed_cache.address, 'is chocked.'
choke_state = 0 # Now, move to normal state
choke_ct = 0
def disconnect(self, tracker_address, video_name, user_name):
for client in self.clients:
client.put_instruction('QUIT')
for client in self.not_connected_caches:
client.put_instruction('QUIT')
self.server_client.put_instruction('QUIT')
print "[user.py] Closed all connections."
##
my_ip = user_name
my_port = 0
my_video_name = video_name
deregister_to_tracker_as_user(tracker_address, my_ip, my_port, video_name) #tracker_address, user_name, 0, video_name
#deregister_to_tracker_as_cache(tracker_address) #for debug - chen
self.info_thread.flag = False
alarm(1) #wait 1 second before running alarm
self.info_thread.join()
alarm(0)
print "[user.py] BYE"
sys.stdout.flush()
