python multi-threading

Question

i have a problem when using my code with threading, the problem is apparently that the variables i define outside of the threading part aren't defined inside the threading part, here is my code:

import sys import socket from time import sleep import threading ip = raw_input ("please insert host ip: ") port = input ("please insert port to fuzz: ") header = raw_input ("please enter the header you want to fuzz, put & in the place you want to fuzz: ") packet = raw_input ("what string would you like to fuzz the header with? : ") multi = input ("in what jumps would you liike to multiply the string ? : ") process = input ("please insert number of threads: ") host = ip, port char = packet * multi a = 1 class ConnectionThread ( threading.Thread ): def run ( self ): while a > 0: try: s = socket.socket( socket.AF_INET, socket.SOCK_STREAM) s.connect((host)) header = header.replace("&", packet) s.send(header) s.settimeout(7) data = s.recv(4) if data > 0: print "got awnser" else: print "no awnser" sleep(0.1) print "Fuzzing With:", header header = header.replace (packet, "&") packet = char + packet s.close() except Exception as e: print e s.close() sys.exit(0) for x in xrange ( process ): ConnectionThread().start()

and i get this as return

local variable 'header' referenced before assignment

Community · Accepted Answer · 2017-05-23 12:20:06Z

1

You need to use global to signify the variable is a global one. See, for example, here

For example, add the following to run (above the if):

global host, header, ... # All the other variables you use

edited May 23, 2017 at 12:20

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answered Jul 17, 2012 at 7:47

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2 Comments

Ba7a7chy Over a year ago

i read your link for the global function discussion , but i dont understand how to use it in my code

Sebastian Blask Over a year ago

I think the essence of the discussion is: don't use it! Use a function for the gathering of all the parameters from the command line and let it return a dict or whatever you prefer, use it as parameter when you initialise the thread (add an init) and then access them as object attribute (self.header or self. parameters['header'] depending on the way you do)

Nick · Accepted Answer · 2012-07-17 08:43:29Z

You will need to give your ConnectionThread class the attributes that you want to pass to it. At the top of the class just put in a init method, this will define the variable that you want to pass to the run method:

import sys import socket from time import sleep import threading class ConnectionThread ( threading.Thread ): def __init__(self): self.ip = raw_input ("please insert host ip: ") self.port = input ("please insert port to fuzz: ") self.header = raw_input ("please enter the header you want to fuzz, put & in the place you want to fuzz: ") self.packet = raw_input ("what string would you like to fuzz the header with? : ") self.multi = input ("in what jumps would you liike to multiply the string ? : ") self.process = input ("please insert number of threads: ") self.host = self.ip, self.port self.char = self.packet * self.multi self.a = 1 def run ( self ): while self.a > 0: try: s = socket.socket( socket.AF_INET, socket.SOCK_STREAM) s.connect((self.host)) self.header = self.header.replace("&", self.packet) s.send(self.header) s.settimeout(7) data = s.recv(4) if data > 0: print "got awnser" else: print "no awnser" sleep(0.1) print "Fuzzing With:", header self.header = self.header.replace (self.packet, "&") self.packet = self.char + self.packet s.close() except Exception as e: print e s.close() sys.exit(0) for x in xrange ( ConnectionThread.process ): ConnectionThread().start()

have a look at how classes work at:

http://docs.python.org/tutorial/classes.html

for additional information.

Hope this helps :)

this code for some odd reason wont work, it justs crash with this error : import: unable to grab mouse ': Resource temporarily unavailable @ error/xwindow.c/XSelectWindow/9052. from: can't read /var/mail/time import: unable to grab mouse ': Resource temporarily unavailable @ error/xwindow.c/XSelectWindow/9052. ./fuzzy.py: line 6: syntax error near unexpected token (' ./fuzzy.py: line 6: class ConnectionThread ( threading.Thread ):' from: can't read /var/mail/time ./fuzzy.py: line 6: syntax error near unexpected token (' ./fuzzy.py: line 6: class ConnectionThread ( threading.Thread ):'

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