CODEWITHSUNDEEP
pythonsocketsnetwork-programming
gal
gal

Reputation: 496

socket.recv() in python truncating output on newline?

Bottom-Line

(let's say i use local gateway for ip and 23 for port, so telnetting into my router)

import socket
q = socket.socket()
q.connect(ip, port)
data = q.recv(1024)
print data

Output in interpreter is four lines:

(some alt-code gibberish or whatever on the first line)
RT v24-sp2 std (c) 2012 NewMedia-NET GmbH
Release: 03/21/12 (SVN revision: 18795)
DD-WRT login:

Output from script:

(just the alt-code gibberish from the first line)

Any advice regarding why this is happening and how to correct it would be greatly appreciated.

Thanks,

Andrew

Upvotes: 0

Views: 4025

Answers (1)

Celada
Celada

Reputation: 22261

When running the commands slowly one at a time, your router has time to send everything it's planning to send before you have a chance to invoke q.recv(1024).

When you run it from a script, the commands execute in quick succession. When the script executes q.recv(1024), the router has only managed to send some data, not all of it.

Since you do not use a loop to go back and try reading more data, that's the end, you will not receive (or print) any more data.

(By the way, what in the world is "alt-code gibberish"? What you should be getting here is some binary data that's part of the telnet protocol negotiation.)

Upvotes: 1

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