(转)[Python 网络编程] makefile (三)

socket.makefile（mode ='r'，buffering = None，*，encoding = None，errors = None，newline = None ）
返回一个与套接字相关联的文件对象。返回的确切类型取决于给makefile()提供的参数。

这些参数的解释方式与内置open()函数的解释方式相同，除了makefile方法唯一支持的mode值是'r'（默认）'w'和'b'。

套接字必须处于阻塞模式; 它可能有超时，但是如果超时发生，文件对象的内部缓冲区可能会以不一致的状态结束。

关闭返回的文件对象makefile()将不会关闭原始套接字，除非所有其他文件对象已关闭并且 socket.close()已在套接字对象上调用。

makefie的简单用法：

#makefile

import threading,logging,socket

DATEFMT="%H:%M:%S"

FORMAT = "[%(asctime)s]\t [%(threadName)s,%(thread)d] %(message)s"

logging.basicConfig(level=logging.INFO,format=FORMAT,datefmt=DATEFMT)

sock = socket.socket()

addr = ('127.0.0.1',9999)

event = threading.Event()

sock.bind(addr)

sock.listen()

def _accept(sock:socket.socket):

s,addrinfo = sock.accept()

f = s.makefile(mode='rw')

while True:

line = f.readline() # read(10) 文本使用readline

logging.info(line)

if line.strip() == 'quit':

break

msg = "Your msg = {}. ack".format(line)

f.write(msg)

f.flush()

f.close()

sock.close()

threading.Thread(target=_accept,args=(sock,)).start()

while not event.wait(2):

logging.info(sock)

#运行结果：

[19:09:47] [MainThread,3544] <socket.socket fd=288, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 9999)>

[19:09:49] [MainThread,3544] <socket.socket fd=288, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 9999)>

[19:09:49] [Thread-1,6044] hi?

[19:09:51] [MainThread,3544] <socket.socket fd=288, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 9999)>

[19:09:53] [MainThread,3544] <socket.socket fd=288, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 9999)>

[19:09:55] [MainThread,3544] <socket.socket fd=288, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 9999)>

[19:09:57] [MainThread,3544] <socket.socket fd=288, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 9999)>

[19:09:59] [MainThread,3544] <socket.socket fd=288, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 9999)>

[19:10:01] [MainThread,3544] <socket.socket fd=288, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 9999)>

[19:10:03] [MainThread,3544] <socket.socket fd=288, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 9999)>

[19:10:05] [MainThread,3544] <socket.socket fd=288, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 9999)>

[19:10:07] [Thread-1,6044] Are you ok?

[19:10:07] [MainThread,3544] <socket.socket fd=288, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 9999)>

[19:10:09] [MainThread,3544] <socket.socket fd=288, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 9999)>

[19:10:11] [MainThread,3544] <socket.socket fd=288, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 9999)>

[19:10:13] [MainThread,3544] <socket.socket fd=288, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 9999)>

[19:10:13] [Thread-1,6044] quit

[19:10:15] [MainThread,3544] <socket.socket [closed] fd=-1, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0>

TCP Server 改装成makefile：

连接两个客户端分别测试消息是否分发正常，客户端quit指令是否可以正常关闭socket，self.clients字典是否已经移除失联的socket。

客户端分别测试正常退出：quit退出，和异常退出：强制退出。然后观察服务端是否运行正常。

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

#TCP Server 改装成makefile

import threading,logging,time,random,datetime,socket

DATEFMT="%H:%M:%S"

FORMAT = "[%(asctime)s]\t [%(threadName)s,%(thread)d] %(message)s"

logging.basicConfig(level=logging.INFO,format=FORMAT,datefmt=DATEFMT)

class ChatServer:

def __init__(self,ip='127.0.0.1',port=9999): #启动服务

self.addr = (ip,port)

self.sock = socket.socket()

self.event = threading.Event()

self.clients = {} #客户端

def show_client(self):

while not self.event.is_set():

if len(self.clients) > 0:

logging.info(self.clients)

self.event.wait(3)

def start(self):

self.sock.bind(self.addr)

self.sock.listen()

# accept会阻塞主线程，所以开一个新线程

threading.Thread(target=self._accept,name='accept',daemon=True).start()

threading.Thread(target=self.show_client,name='show_client',daemon=True).start()

def stop(self):

for c in self.clients.values():

c.close()

self.sock.close()

self.event.wait(3)

self.event.set()

def _accept(self):

while not self.event.is_set(): #多人连接

conn,client = self.sock.accept() #阻塞

f = conn.makefile(mode='rw',encoding='utf8')

self.clients[client] = f

logging.info("{}-{}".format(conn,client))

# recv 默认阻塞,每一个连接单独起一个recv线程准备接收数据

threading.Thread(target=self._recv, args=(f, client), name='recv',daemon=True).start()

def _recv(self, f, client): #接收客户端数据

while not self.event.is_set():

try:

data = f.readline()

except Exception:

data = 'quit'

finally:

msg = data.strip()

# Client通知退出机制

if msg == 'quit':

f.close()

self.clients.pop(client)

logging.info('{} quit'.format(client))

break

msg = "{:%Y/%m/%d %H:%M:%S} {}:{}\n{}\n".format(datetime.datetime.now(),*client,data)

print(msg)

logging.info(msg)

for c in self.clients.values():

c.writelines(msg)

c.flush()

cs = ChatServer()

print('!!!!!!!!!!!')

cs.start()

print('~~~~~~~~~~~~~~~~~~~~')

e = threading.Event()

def showthreads(e:threading.Event):

while not e.wait(3):

logging.info(threading.enumerate())

threading.Thread(target=showthreads,name='showthreads',args=(e,)).start()

while not e.wait(1): # Sever控制台退出方式

cmd = input('>>> ').strip()

if cmd == 'quit':

cs.stop()

e.wait(3)

break

#运行结果：

!!!!!!!!!!!

~~~~~~~~~~~~~~~~~~~~

>>> [15:18:49] [show_client,4284] {('127.0.0.1', 3507): <_io.TextIOWrapper mode='rw' encoding='utf8'>}

[15:18:49] [accept,2820] <socket.socket fd=388, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 9999), raddr=('127.0.0.1', 3507)>-('127.0.0.1', 3507)

[15:18:49] [showthreads,8384] [<Thread(showthreads, started 8384)>, <Thread(accept, started daemon 2820)>, <Thread(show_client, started daemon 4284)>, <_MainThread(MainThread, started 932)>, <Thread(recv, started daemon 10156)>]

[15:18:52] [show_client,4284] {('127.0.0.1', 3507): <_io.TextIOWrapper mode='rw' encoding='utf8'>}

[15:18:52] [showthreads,8384] [<Thread(showthreads, started 8384)>, <Thread(accept, started daemon 2820)>, <Thread(show_client, started daemon 4284)>, <_MainThread(MainThread, started 932)>, <Thread(recv, started daemon 10156)>]

[15:18:54] [recv,10156] 2017/12/24 15:18:54 127.0.0.1:3507

2017/12/24 15:18:54 127.0.0.1:3507

123

[15:18:55] [show_client,4284] {('127.0.0.1', 3507): <_io.TextIOWrapper mode='rw' encoding='utf8'>}

[15:18:55] [showthreads,8384] [<Thread(showthreads, started 8384)>, <Thread(accept, started daemon 2820)>, <Thread(show_client, started daemon 4284)>, <_MainThread(MainThread, started 932)>, <Thread(recv, started daemon 10156)>]

[15:18:58] [show_client,4284] {('127.0.0.1', 3507): <_io.TextIOWrapper mode='rw' encoding='utf8'>}

[15:18:58] [showthreads,8384] [<Thread(showthreads, started 8384)>, <Thread(accept, started daemon 2820)>, <Thread(show_client, started daemon 4284)>, <_MainThread(MainThread, started 932)>, <Thread(recv, started daemon 10156)>]

[15:19:01] [show_client,4284] {('127.0.0.1', 3507): <_io.TextIOWrapper mode='rw' encoding='utf8'>}

[15:19:01] [showthreads,8384] [<Thread(showthreads, started 8384)>, <Thread(accept, started daemon 2820)>, <Thread(show_client, started daemon 4284)>, <_MainThread(MainThread, started 932)>, <Thread(recv, started daemon 10156)>]

[15:19:04] [show_client,4284] {('127.0.0.1', 3507): <_io.TextIOWrapper mode='rw' encoding='utf8'>}

[15:19:04] [showthreads,8384] [<Thread(showthreads, started 8384)>, <Thread(accept, started daemon 2820)>, <Thread(show_client, started daemon 4284)>, <_MainThread(MainThread, started 932)>, <Thread(recv, started daemon 10156)>]

[15:19:07] [show_client,4284] {('127.0.0.1', 3507): <_io.TextIOWrapper mode='rw' encoding='utf8'>}

[15:19:07] [showthreads,8384] [<Thread(showthreads, started 8384)>, <Thread(accept, started daemon 2820)>, <Thread(show_client, started daemon 4284)>, <_MainThread(MainThread, started 932)>, <Thread(recv, started daemon 10156)>]

[15:19:10] [show_client,4284] {('127.0.0.1', 3507): <_io.TextIOWrapper mode='rw' encoding='utf8'>}

[15:19:10] [showthreads,8384] [<Thread(showthreads, started 8384)>, <Thread(accept, started daemon 2820)>, <Thread(show_client, started daemon 4284)>, <_MainThread(MainThread, started 932)>, <Thread(recv, started daemon 10156)>]

[15:19:12] [recv,10156] 2017/12/24 15:19:12 127.0.0.1:3507

[15:19:12] [recv,10156] ('127.0.0.1', 3507) quit

2017/12/24 15:19:12 127.0.0.1:3507

[15:19:13] [showthreads,8384] [<Thread(showthreads, started 8384)>, <Thread(accept, started daemon 2820)>, <Thread(show_client, started daemon 4284)>, <_MainThread(MainThread, started 932)>]

总结：

使用makefile返回一个套接字相关联的文件对象，对该文件对象的操作方法，与普通文件操作方法一致，read,readline,write,writeline

makefile不仅仅可以对accept建立连接后的socketObject使用，也可对主线程的sock和任何socketObject使用。

(转)[Python 网络编程] makefile (三)的更多相关文章

[Python 网络编程] makefile (三)
socket.makefile(mode ='r',buffering = None,*,encoding = None,errors = None,newline = None )返回一个与套接字相 ...
python网络编程【三】(网络服务器)
建立一个服务器需要以下4步: 1.建立socket对象. 2.设置socket选项(可选的) 3.绑定到一个端口(同样,也可以是一个指定的网卡). 4.侦听连接. 下面代码片段可以实现这些功能: ho ...
python 网络编程（三）---TCP 服务器端客户端实现
客户端客户端主要有4个步骤: 1)创建一个socket以连接服务器. socket = socket.socket(family, type),family参数代表地址家族,可为AF_INET(包括 ...
python 网络编程第三版
为服务端增加多线程解决方案 1.服务端代码如下: ***这个版本并没有真正的起到多线程的作用,主要原因在于t.join():以后的版本会改进这个问题*** #!/usr/bin/python #!co ...
第十一章：Python の网络编程基础(三)
本課主題多线程的创建和使用消息队列的介绍 Python 操作 memached 和 redis 实战本周作业消息队列的介绍对列是在内存中创建的,如果整个进程里的程序运行完毕之后会被清空,消息 ...
python网络编程（三）
udp网络通信过程 udp应用:echo服务器参考代码 #coding=utf-8 from socket import * #1. 创建套接字 udpSocket = socket(AF_INET ...
28、Python网络编程
一.基于TCP协议的socket套接字编程 1.套接字工作流程先从服务器端说起.服务器端先初始化Socket,然后与端口绑定(bind),对端口进行监听(listen),调用accept阻塞,等待客 ...
图解Python网络编程
返回目录本篇索引 (1)基本原理 (2)socket模块 (3)select模块 (4)asyncore模块 (5)asynchat模块 (6)socketserver模块 (1)基本原理本篇指的 ...
Python 网络编程（二）
Python 网络编程上一篇博客介绍了socket的基本概念以及实现了简单的TCP和UDP的客户端.服务器程序,本篇博客主要对socket编程进行更深入的讲解一.简化版ssh实现这是一个极其简单 ...

随机推荐

css3 --linear-gradient-渐变色
//由上至下变色 background:-moz-linear-gradient( top,#f9b347,#f4ad40,#f9b347); background:-webkit-gradient ...
分离式lnmp部署
分离式lnmp简介 lnmp和lamp一样,是一种常用的web环境, 在实际环境中,lnmp中的三个服务常常为了更好的性能而分在三台主机上安装. 本篇内只介绍nginx和php-fpm+mysql分离 ...
elasticdump 方法迁移数据
elasticdump -rm -ti taskrabbit/elasticsearch-dump --ignore-errors=true --offset=1000 --input=http:/ ...
Codeforces Round #538 (Div. 2) CTrailing Loves (or L'oeufs?)
这题明白的意思就是求n!在b进制下的后缀零的个数. 即最大的n!%(b^k)==0的k的值.我们需要将如果要构成b这个数,肯定是由一个个质因子相乘得到的.我们只需要求出b的质因子,然后分析n!中可以组 ...
Js2WordCloud 词云用法
1.引入 npm 安装: npm install js2wordcloud --save 通过script引入: <script src="dist/js2wordcloud.min. ...
P3398 仓鼠找sugar (一道LCA的裸题)
https://www.luogu.org/problemnew/show/P3398 题意简单概括一下就是求树上两条路径是否相交; 有这样一个性质: if相交,则必有lca(a,b) 在路径c &l ...
qt字符数组转ASCII（十六进制）
接收网络传输数据 QByteArray array;//显示字符串 QString str = QString::fromLocal8Bit(array); m_receiveTxt.append( ...
css 文本超出2行就隐藏并且显示省略号
overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-box-orient: vertical; -webk ...
Unicode vs. UTF-8 etc.
目测是个老问题了.随便一搜,网上各种总结过.这里不辞啰嗦,尽量简洁的备忘一下. 几个链接,有道云笔记链接,都是知乎上几个问题的摘录:阮一峰的日志,1-5 还是值得参考,但是之后的部分则混淆了 Wind ...
TYVJ1424-占卜DIY
题目有点长,对于样例最好拿张A4纸模拟写一遍. 可以发现程序一定不会死循环,因为每种牌都是4张,而死循环的条件是某种牌有5张然后你拿了又放进去.如果写出来死循环了,那就是写不对了. 有几点可能是需要注 ...

(转)[Python 网络编程] makefile (三)

(转)[Python 网络编程] makefile (三)的更多相关文章

随机推荐

热门专题