Envoi d'image via des sockets (UNIQUEMENT) en Python, l'image ne peut pas être ouverte
Je souhaite télécharger l'image du client vers le serveur en utilisant UNIQUEMENT des sockets en Python. J'ai conçu un flux de protocole très simple de la façon dont je voudrais faire cela:
CLIENT SERVER
SIZE 512 (send image size)
---------------------------------->
GOT SIZE
<----------------------------------
send image itself
---------------------------------->
GOT IMAGE
<----------------------------------
BYE BYE
---------------------------------->
server closes socket
Voici mon code client:
#!/usr/bin/env python
import random
import socket, select
from time import gmtime, strftime
from random import randint
image = "Tux.png"
Host = '127.0.0.1'
PORT = 6666
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_address = (Host, PORT)
sock.connect(server_address)
try:
# open image
myfile = open(image, 'rb')
bytes = myfile.read()
size = len(bytes)
# send image size to server
sock.sendall("SIZE %s" % size)
answer = sock.recv(4096)
print 'answer = %s' % answer
# send image to server
if answer == 'GOT SIZE':
sock.sendall(bytes)
# check what server send
answer = sock.recv(4096)
print 'answer = %s' % answer
if answer == 'GOT IMAGE' :
sock.sendall("BYE BYE ")
print 'Image successfully send to server'
myfile.close()
finally:
sock.close()
Et mon serveur, qui reçoit des images des clients:
#!/usr/bin/env python
import random
import socket, select
from time import gmtime, strftime
from random import randint
imgcounter = 1
basename = "image%s.png"
Host = '127.0.0.1'
PORT = 6666
connected_clients_sockets = []
server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
server_socket.bind((Host, PORT))
server_socket.listen(10)
connected_clients_sockets.append(server_socket)
while True:
read_sockets, write_sockets, error_sockets = select.select(connected_clients_sockets, [], [])
for sock in read_sockets:
if sock == server_socket:
sockfd, client_address = server_socket.accept()
connected_clients_sockets.append(sockfd)
else:
try:
data = sock.recv(4096)
txt = str(data)
if txt.startswith('SIZE'):
tmp = txt.split()
size = int(tmp[1])
print 'got size'
sock.send("GOT SIZE")
Elif txt.startswith('BYE'):
sock.shutdown()
Elif data:
myfile = open(basename % imgcounter, 'wb')
data = sock.recv(40960000)
if not data:
myfile.close()
break
myfile.write(data)
myfile.close()
sock.send("GOT IMAGE")
sock.shutdown()
except:
sock.close()
connected_clients_sockets.remove(sock)
continue
imgcounter += 1
server_socket.close()
Pour l'exemple d'image:
Le client imprime des messages qui suggèrent d'envoyer correctement l'image au serveur:
answer = GOT SIZE
answer = GOT IMAGE
Image successfully send to server
L'image est créée côté serveur, mais je ne peux pas l'ouvrir. Et oui, j'ai essayé différentes images. Sans succès. Je ne peux pas les ouvrir côté serveur, même s'ils sont disponibles sur place.
Grâce à @BorrajaX, j'ai réussi à le faire fonctionner! Merci! :)
#!/usr/bin/env python
import random
import socket, select
from time import gmtime, strftime
from random import randint
imgcounter = 1
basename = "image%s.png"
Host = '127.0.0.1'
PORT = 6666
connected_clients_sockets = []
server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
server_socket.bind((Host, PORT))
server_socket.listen(10)
connected_clients_sockets.append(server_socket)
while True:
read_sockets, write_sockets, error_sockets = select.select(connected_clients_sockets, [], [])
for sock in read_sockets:
if sock == server_socket:
sockfd, client_address = server_socket.accept()
connected_clients_sockets.append(sockfd)
else:
try:
data = sock.recv(4096)
txt = str(data)
if data:
if data.startswith('SIZE'):
tmp = txt.split()
size = int(tmp[1])
print 'got size'
sock.sendall("GOT SIZE")
Elif data.startswith('BYE'):
sock.shutdown()
else :
myfile = open(basename % imgcounter, 'wb')
myfile.write(data)
data = sock.recv(40960000)
if not data:
myfile.close()
break
myfile.write(data)
myfile.close()
sock.sendall("GOT IMAGE")
sock.shutdown()
except:
sock.close()
connected_clients_sockets.remove(sock)
continue
imgcounter += 1
server_socket.close()
D'accord, votre problème est que, dans le cas d'une image réelle reçue, vous lisez deux fois le socket et ignorez les données lors de la première lecture et écrivez simplement les données reçues lors de la deuxième lecture. Votre fichier image est donc incomplet. Voir mon correctif ci-dessous, vous pouvez optimiser cela en le prenant comme point de départ. Cela fonctionne comme tel.
#!/usr/bin/env python
import random
import socket, select
from time import gmtime, strftime
from random import randint
imgcounter = 1
basename = "image%s.png"
Host = '127.0.0.1'
PORT = 6666
connected_clients_sockets = []
server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
server_socket.bind((Host, PORT))
server_socket.listen(10)
connected_clients_sockets.append(server_socket)
buffer_size = 4096
while True:
read_sockets, write_sockets, error_sockets = select.select(connected_clients_sockets, [], [])
for sock in read_sockets:
if sock == server_socket:
sockfd, client_address = server_socket.accept()
connected_clients_sockets.append(sockfd)
else:
try:
print ' Buffer size is %s' % buffer_size
data = sock.recv(buffer_size)
txt = str(data)
if txt.startswith('SIZE'):
tmp = txt.split()
size = int(tmp[1])
print 'got size'
print 'size is %s' % size
sock.send("GOT SIZE")
# Now set the buffer size for the image
buffer_size = 40960000
Elif txt.startswith('BYE'):
sock.shutdown()
Elif data:
myfile = open(basename % imgcounter, 'wb')
# data = sock.recv(buffer_size)
if not data:
myfile.close()
break
myfile.write(data)
myfile.close()
sock.send("GOT IMAGE")
buffer_size = 4096
sock.shutdown()
except:
sock.close()
connected_clients_sockets.remove(sock)
continue
imgcounter += 1
server_socket.close()