socket server化

1, the principles outlined socket

      Also known word or jack socket Suite is an essential tool for network communication. There is a saying: "No socket, not the network." Since the first socket used on BSD Unix, and Unix / Linux regarded as a classic of the supreme philosophy is "Everything is a file." Therefore, when using the socket is completely in line with this philosophy, it relates to listen (), bind (), accept (), the function function write () / read (), close () is similar to other basic file operations.

Following substantially as a function of the client and server required enumerated in detail

Both figures above overview of the communication principle of socket

2, python socket server in Examples

Server:

# 导入 socket模块
import socket
import urllib.request

# 创建 socket 对象
s = socket.socket()

# 绑定IP地址和端口号
s.bind(("10.202.98.14", 8000))  #本主机地址和端口号

# 设置最大连接数，超过后排队
s.listen(5)
print("等待连接...")

while True:
    conn,addr = s.accept()  #conn为套接字，addr为Ip地址
    print("连接地址: " ,addr)
    msg='欢迎访问菜鸟教程！'
    conn.sendall(msg.encode('utf-8')) #向客户端发送消息，8位编码格式编码为字节传输

    urlByte = conn.recv(1024)  #接收客户端的消息
    print(urlByte)  #接收到的是字节类型
    print(urlByte.decode('utf-8'))#对字节进行解码

    urlStr = urlByte.decode('utf-8')
    urllib.request.urlretrieve(urlStr,"1.jpg") #给了图片网址链接，将图片下载下来

    conn.close()#关闭套接字

Client:

# 导入 socket模块
import socket
import urllib.request

# 创建 socket 对象
s = socket.socket()

# 连接服务，指定IP地址和端口（服务器端的）
s.connect(("10.202.98.14", 8000))

#向服务端发送图片网址链接，编码成字节形式进行发送
s.sendall("http://img.netbian.com/file/20110706/527402dc667609f7ad644c5a51361fdc.jpg".encode('utf-8'))

# 接收小于 1024 字节的数据
msg = s.recv(1024)#接收服务端的消息，接收的是字节类型
s.close()
print (msg.decode('utf-8'))#对字节类型进行解码

First implementation of the server, the server to accept the implementation of the start blocks, waiting for response from the client, and then perform a client.

Client The results:

Server implementation of the results: the picture and download the

Reference:  socket technology explain (see socket programming)