[英]how to send/receive multiple data? python socket?
我正在嘗試發送/接收多個數據。 服務器完美發送文件名和文件數據。 問題出在客戶端。 我創建了一個名為 filename 和 filedata 的兩個變量。 filename 變量接收帶有文件數據的文件名。 filedata 什么也沒收到,因為 filename 收到了所有的文件名和文件數據。 我不知道為什么文件名收到文件名+數據? 我該如何解決這個問題?
這是我的代碼:
import socket
def send():
host = 'localhost'
port = 9999
address = (host, port)
sock = socket.socket()
sock.bind(address)
sock.listen(5)
print('listining for connection...')
con,addr = sock.accept()
print('Got connection from',addr)
file1name = 'file1.txt'
con.send(file1name.encode('utf-8'))
file1data = 'this is file 1'
con.send(file1data.encode('utf-8'))
file2name = 'file2.txt'
con.send(file2name.encode('utf-8'))
file2data = 'this is file 2'
con.send(file2data.encode('utf-8'))
con.close()
sock.shutdown(1)
sock.close()
print('connection closed!')
send()
import socket
host = 'localhost'
port = 9999
address = (host, port)
sock = socket.socket()
sock.connect(address)
print('connected to', address)
while True:
filename = sock.recv(60).decode('utf-8')
if not filename:
break
print('filename -', filename)
data = sock.recv(60).decode('utf-8')
print('data -', data)
sock.shutdown(1)
sock.close()
listining for connection...
Got connection from ('127.0.0.1', 36886)
connection closed!
connected to ('localhost', 9999)
filename - file1.txtthis is file 1file2.txtthis is file 2
data -
主要問題是您必須在開始接收之前將數據大小發送到客戶端。
我假設服務器發送一個 unsigned int 32bit(4byte) 來表示大小。
參見 client.py 中的 soc.recv(4)
from socket import *
import os
import ctypes
HOST = 'localhost'
PORT = 9999
ADDRESS = (HOST, PORT)
BUF_SIZE = 1024
PATH = './uploads'
soc = socket(AF_INET, SOCK_STREAM)
soc.bind(ADDRESS)
soc.listen(5)
print('listen for connection...')
con,addr = soc.accept()
print('got connection from', addr)
print('-------------------------')
def sendFile(socket, path):
filename = os.path.basename(path)
filename_bytes = filename.encode('utf-8')
filename_size = ctypes.c_uint32(len(filename_bytes))
file_size = ctypes.c_uint32(os.stat(path).st_size)
socket.send(bytes(filename_size)) # send uint32 (4 bytes)
socket.send(filename_bytes)
socket.send(bytes(file_size)) # send uint32 (4 bytes)
with open(path, 'rb') as f:
filecontent = f.read(BUF_SIZE)
while filecontent:
socket.send(filecontent)
filecontent = f.read(BUF_SIZE)
files = os.listdir(PATH)
num_files = ctypes.c_uint32(len(files))
con.send(bytes(num_files))
for file in files:
sendFile(con, os.path.join(PATH, file))
from socket import *
import os
import ctypes
HOST = 'localhost'
PORT = 9999
ADDRESS = (HOST, PORT)
BUF_SIZE = 1024
PATH = './downloads'
soc = socket(AF_INET, SOCK_STREAM)
soc.connect(ADDRESS)
print('connected to', ADDRESS)
def recvFile(socket):
tmp = soc.recv(4)
filename_size = int.from_bytes(tmp, byteorder='little')
print('filename_size =', filename_size)
filename = soc.recv(filename_size).decode('utf-8')
print('filename =', filename)
tmp = soc.recv(4)
file_size = int.from_bytes(tmp, byteorder='little')
print('file_size =', file_size)
with open(os.path.join(PATH, filename), 'wb') as f:
while file_size > 0:
filecontent = soc.recv(min(BUF_SIZE, file_size))
f.write(filecontent)
file_size -= len(filecontent)
print('data recvd')
tmp = soc.recv(4)
num_files = int.from_bytes(tmp, byteorder='little')
for i in range(num_files):
print('{}/{}'.format(i+1, num_files))
recvFile(soc)
soc.shutdown(SHUT_RDWR)
soc.close()
print('socket closed')
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