phone = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
phone.bind(('127.0.0.1',8080))
phone.listen(5)
while 1 : # 循环连接客户端
conn, client_addr = phone.accept()
print(client_addr)
while 1:
try:
from_client_data = conn.recv(1024)
print(from_client_data.decode('utf-8'))
conn.send(from_client_data + b'SB')
except ConnectionResetError:
break
conn.close()
phone.close()
服务端
import socket
phone = socket.socket(socket.AF_INET,socket.SOCK_STREAM) # 买电话
phone.connect(('127.0.0.1',8080)) # 与客户端建立连接, 拨号
while 1:
client_data = input('>>>')
phone.send(client_data.encode('utf-8'))
from_server_data = phone.recv(1024)
print(from_server_data.decode('utf-8'))
phone.close() # 挂电话
客户端
详解recv的工作原理
'''
源码解释:
Receive up to buffersize bytes from the socket.
接收来自socket缓冲区的字节数据,
For the optional flags argument, see the Unix manual.
对于这些设置的参数,可以查看Unix手册。
When no data is available, block untilat least one byte is available or until the remote end is closed.
当缓冲区没有数据可取时,recv会一直处于阻塞状态,直到缓冲区至少有一个字节数据可取,或者远程端关闭。
When the remote end is closed and all data is read, return the empty string.
关闭远程端并读取所有数据后,返回空字符串。
'''
----------服务端------------:
# 1,验证服务端缓冲区数据没有取完,又执行了recv执行,recv会继续取值。
import socket
phone =socket.socket(socket.AF_INET,socket.SOCK_STREAM)
phone.bind(('127.0.0.1',8080))
phone.listen(5)
conn, client_addr = phone.accept()
from_client_data1 = conn.recv(2)
print(from_client_data1)
from_client_data2 = conn.recv(2)
print(from_client_data2)
from_client_data3 = conn.recv(1)
print(from_client_data3)
conn.close()
phone.close()
# 2,验证服务端缓冲区取完了,又执行了recv执行,此时客户端20秒内不关闭的前提下,recv处于阻塞状态。
import socket
phone =socket.socket(socket.AF_INET,socket.SOCK_STREAM)
phone.bind(('127.0.0.1',8080))
phone.listen(5)
conn, client_addr = phone.accept()
from_client_data = conn.recv(1024)
print(from_client_data)
print(111)
conn.recv(1024) # 此时程序阻塞20秒左右,因为缓冲区的数据取完了,并且20秒内,客户端没有关闭。
print(222)
conn.close()
phone.close()
# 3 验证服务端缓冲区取完了,又执行了recv执行,此时客户端处于关闭状态,则recv会取到空字符串。
import socket
phone =socket.socket(socket.AF_INET,socket.SOCK_STREAM)
phone.bind(('127.0.0.1',8080))
phone.listen(5)
conn, client_addr = phone.accept()
from_client_data1 = conn.recv(1024)
print(from_client_data1)
from_client_data2 = conn.recv(1024)
print(from_client_data2)
from_client_data3 = conn.recv(1024)
print(from_client_data3)
conn.close()
phone.close()
------------客户端------------
# 1,验证服务端缓冲区数据没有取完,又执行了recv执行,recv会继续取值。
import socket
import time
phone = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
phone.connect(('127.0.0.1',8080))
phone.send('hello'.encode('utf-8'))
time.sleep(20)
phone.close()
# 2,验证服务端缓冲区取完了,又执行了recv执行,此时客户端20秒内不关闭的前提下,recv处于阻塞状态。
import socket
import time
phone = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
phone.connect(('127.0.0.1',8080))
phone.send('hello'.encode('utf-8'))
time.sleep(20)
phone.close()
# 3,验证服务端缓冲区取完了,又执行了recv执行,此时客户端处于关闭状态,则recv会取到空字符串。
import socket
import time
phone = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
phone.connect(('127.0.0.1',8080))
phone.send('hello'.encode('utf-8'))
phone.close()
View Code
远程执行命令的示例:
import socket
import subprocess
phone = socket.