The most important steps for python to transfer files are as follows:
1). The information of the file to be transmitted is sent, including the package, size, and other information;
2). The sender reads and sends the file content, and the receiver writes the content in the cache to the file.
Sender:From socket import *
Import OS
Import struct ADDR = ('1970. 168.1.103 ', 192)
Bufsize = 1024
Filename = 'client. py'
Fileinfo_size = struct. calcsize ('128s32si8s ') Sendsock = socket (af_inet, sock_stream)
Sendsock. Connect (ADDR) Fhead = struct. Pack ('128s11i', filename, 0, 0, 0, 0, 0, 0, OS. Stat (filename). st_size, 0, 0)
Sendsock. Send (fhead) Fp = open (filename, 'rb ')
While 1:
Filedata = FP. Read (bufsize)
If not filedata: Break
Sendsock. Send (filedata)
FP. Close () Sendsock. Close () Acceptor: #-*-Coding: cp936 -*-
From socket import *
Import struct ADDR = ('1970. 168.1.103 ', 192)
Bufsize = 1024
Fileinfo_size = struct. calcsize ('128s32si8s ') Recvsock = socket (af_inet, sock_stream)
Recvsock. BIND (ADDR)
Recvsock. Listen (true) Print "Wait ..."
Conn, ADDR = recvsock. Accept ()
Print "send from", ADDR Fhead = conn. Recv (fileinfo_size)
Filename, temp1, filesize, temp2 = struct. Unpack ('128s32si8s', fhead)
# Print filename, temp1, filesize, temp2
Print filename, Len (filename), type (filename)
Print filesize Filename = 'new _ '+ filename. Strip (' \ 00 ')#...
Fp = open (filename, 'wb ')
Restsize = filesize
While 1:
If restsize> bufsize:
Filedata = conn. Recv (bufsize)
Else:
Filedata = conn. Recv (restsize)
If not filedata: Break
FP. Write (filedata)
Restsize = restsize-len (filedata)
If restsize = 0: Break
FP. Close () Conn. Close ()
Recvsock. Close () Print "finished" In the code, the file information is transmitted in struct mode. The receiving end receives the file and unpack it. The whole process is sent and received twice, which is the whole process. |
