CODEWITHSUNDEEP
pythonencodingbinarysystem
Timothy Leung
Timothy Leung

Reputation: 1465

Send Null Byte?

Is it possible to send null byte through internet so that the other side can read it properly without truncation at null byte position?

For example:

str = "\xab\xcd\x00\x12\xf6\xbe"

The other side can only read \xab\xcd now.

Upvotes: 0

Views: 5078

Answers (1)

Alex Martelli
Alex Martelli

Reputation: 881805

Sure, the task is trivial, if the server is receiving binary data correctly. For example, server side:

from socket import *
serverSocket = socket(AF_INET, SOCK_DGRAM)
serverSocket.bind(('', 12000))

while True:
    message, address = serverSocket.recvfrom(1024)
    print 'Server received', repr(message)
    serverSocket.sendto(message + message, address)

and client side

from socket import *
message = '\xab\xcd\x00\x12\xf6\xbe'
clientSocket = socket(AF_INET, SOCK_DGRAM)
clientSocket.sendto(message, ('127.0.0.1', 12000))
data, server = clientSocket.recvfrom(1024)
print 'client received:', repr(data)

shows it working perfectly (running client and server on two terminals on the same machine, given the IP address I'm using here:-).

Upvotes: 2

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