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Summary of functions commonly used in python network programming

高洛峰
Release： 2016-10-20 10:24:03
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Summarize the functions commonly used in python network programming

socket.getservbyname(servicename[, protocolname]) –> integer
   
查询某个协议对应的端口号，需要使用两个参数，servicename对应端口名称，如 http， smtp，等。protocolname对应tcp，udp。
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s.getsockname()
s.getpeername()
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getsockname: Return the address of the local endpoint. For IP sockets, the address info is a pair (hostaddr, port)

getpeername: Return the address of the remote endpoint.For IP sockets, the address info is a pair (hostaddr, port). Related socket.gaierror

Socket.herror related to other address errors

Socket.timeout related to processing timeout after calling settimeout() on a socket

When using connect() call, the program can solve it There is a problem in converting the host name into an IP address. If the host name is incorrect, socket.gaierror will be generated. If there is a problem connecting to the remote host, socket.error will be generated.

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