Python 这里没有办法知道这个协议是否能可靠地工作。你会具体复习什么？如果没有协议，您如何判断代码是否正确实现了协议？@DavidSchwartz:我尝试过，但图像发送部分仍然存在问题（请参阅我的编辑）。你能帮忙吗？@DavidSchwartz:还有一个问题。如果我
Python 这里没有办法知道这个协议是否能可靠地工作。你会具体复习什么？如果没有协议，您如何判断代码是否正确实现了协议？@DavidSchwartz:我尝试过，但图像发送部分仍然存在问题（请参阅我的编辑）。你能帮忙吗？@DavidSchwartz:还有一个问题。如果我,python,file,sockets,tcp,Python,File,Sockets,Tcp,这里没有办法知道这个协议是否能可靠地工作。你会具体复习什么？如果没有协议，您如何判断代码是否正确实现了协议？@DavidSchwartz:我尝试过，但图像发送部分仍然存在问题（请参阅我的编辑）。你能帮忙吗？@DavidSchwartz:还有一个问题。如果我使用UDP代替TCP，我将不需要设计协议？我理解得对吗？ SERVER CLIENT GET <----------------
这里没有办法知道这个协议是否能可靠地工作。你会具体复习什么？如果没有协议，您如何判断代码是否正确实现了协议？@DavidSchwartz:我尝试过，但图像发送部分仍然存在问题（请参阅我的编辑）。你能帮忙吗？@DavidSchwartz:还有一个问题。如果我使用UDP代替TCP，我将不需要设计协议？我理解得对吗？
SERVER CLIENT
GET
<----------------
IMAGE
----------------->
END OF COMMUNICATION
#!/usr/bin/env python
import random
import socket, select
from time import gmtime, strftime
image = 'image.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)
bytes = open(image).read()
if data:
sock.send(bytes)
except:
sock.close()
connected_clients_sockets.remove(sock)
continue
server_socket.close()
#!/usr/bin/env python
import socket
import sys
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:
sock.sendall("GET")
while True:
myfile = open('imagefromserv.png', 'w')
while True:
data = sock.recv(4096)
if not data:
break
myfile.write(data)
myfile.close()
finally:
sock.close()
CLIENT SERVER
GET\r\n
----------------------------------->
OK\r\n
<-----------------------------------
GET_SIZE\r\n
----------------------------------->
SIZE 1024\r\n
<-----------------------------------
GET_IMG\r\n
----------------------------------->
IMG_DATA\r\r
<-----------------------------------
--GET--
--GET_SIZE--
--24518--
--GET_IMG--
--OK--
--SIZE 24518--
--24518--
4096
8192
12288
16384
20480
24523
Image received successfully
#!/usr/bin/env python
import socket
import sys
HOST = '127.0.0.1'
PORT = 6666
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_address = (HOST, PORT)
sock.connect(server_address)
fname = 'fromserver.png'
try:
sock.sendall("GET\r\n")
data = sock.recv(4096)
if data:
txt = data.strip()
print '--%s--' % txt
if txt == 'OK':
sock.sendall("GET_SIZE\r\n")
data = sock.recv(4096)
if data:
txt = data.strip()
print '--%s--' % txt
if txt.startswith('SIZE'):
tmp = txt.split()
size = int(tmp[1])
print '--%s--' % size
sock.sendall("GET_IMG\r\n")
myfile = open(fname, 'wb')
amount_received = 0
while amount_received < size:
data = sock.recv(4096)
if not data :
break
amount_received += len(data)
print amount_received
txt = data.strip('\r\n')
if 'EOF' in str(txt) :
print 'Image received successfully'
myfile.write(data)
myfile.close()
else :
myfile.write(data)
finally:
sock.close()
#!/usr/bin/env python
import random
import socket, select
from time import gmtime, strftime
image = 'tux.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)
if data :
txt = data.strip()
print '--%s--'%txt
if txt == 'GET' :
sock.sendall('OK\r\n')
elif txt == 'GET_SIZE' :
with open ('tux.png','rb') as f1:
file_size = len(f1.read())
f1.seek(0)
print '--%s--'%file_size
file_size = '%s' % file_size
sock.sendall('SIZE %s\r\n' % file_size)
elif txt == 'GET_IMG' :
with open(image, 'rb') as fp:
image_data = fp.read()
msg = '%sEOF\r\r' % image_data
sock.sendall(msg)
print msg
except:
sock.close()
connected_clients_sockets.remove(sock)
continue
server_socket.close()
sock.sendall(image_data)
sock.sendall('EOF\r\n')
msg = '%sEOF\r\n' % image_data
sock.sendall(msg)
from twisted.web.static import File
from twisted.web.resource import Resource
def resource():
resource = Resource()
resource.putChild(b"", File(u"xkcd/sandwich.png"))
return resource
from filepath import FilePath
from twisted.internet.task import react
from treq import get, content
def main(reactor):
d = get(b"http://localhost:8080/")
d.addCallback(content)
d.addCallback(FilePath(u"image.png").setContent)
return d
react(main, [])
(everything) exarkun@baryon:/tmp/demo$ twist web --class server.resource
2017-02-23T21:32:14-0500 [-] Site starting on 8080
2017-02-23T21:32:14-0500 [twisted.web.server.Site#info] Starting factory <twisted.web.server.Site instance at 0x7fd1ef81a8c0>
2017-02-23T21:32:14-0500 [twisted.application.runner._runner.Runner#info] Starting reactor...
2017-02-23T21:33:01-0500 [twisted.python.log#info] "127.0.0.1" - - [24/Feb/2017:02:33:01 +0000] "GET / HTTP/1.1" 200 21489 "-" "-"
^C
2017-02-23T21:33:05-0500 [-] Received SIGINT, shutting down.
2017-02-23T21:33:05-0500 [-] (TCP Port 8080 Closed)
2017-02-23T21:33:05-0500 [twisted.web.server.Site#info] Stopping factory <twisted.web.server.Site instance at 0x7fd1ef81a8c0>
2017-02-23T21:33:05-0500 [-] Main loop terminated.
(everything) exarkun@baryon:/tmp/demo$
(everything) exarkun@baryon:/tmp/demo$ ls -l image.png
ls: cannot access 'image.png': No such file or directory
(everything) exarkun@baryon:/tmp/demo$ python client.py
(everything) exarkun@baryon:/tmp/demo$ ls -l image.png
-rwxr-xr-x 1 exarkun exarkun 21489 Feb 23 21:33 image.png
(everything) exarkun@baryon:/tmp/demo$