Fingerprinting

def escapeMe(message): #Escape characters (using ASCII value) not allowed in JSON
    new = ""
    for num in range(len(message)):
        char_code = ord(message[num])
        if char_code < 32 or char_code == 39 or             char_code == 34 or char_code == 92:
            new = new + "%" + binascii.hexlify(message[num])
        else:
            new = new + message[num]
    return new

def sendDevice(gotcha): #Send the device report to the server as a POST
    try:
        url = "http://127.0.0.1:3707/new/" #Server address
        gotcha = escapeMe(gotcha)
        values = json.dumps({'device' : str(gotcha)})
        req = urllib2.Request(url)
        req.add_header('Content-Type', 'application/json')
        rsp = urllib2.urlopen(req, values)
        code = rsp.getcode()
    except Exception, e:
        print e

def removeDevice(ip): #Send request to remove device
    try:
        ip = ip.replace('.','-')
        url = "http://127.0.0.1:3707/remove/"+ip+"/"
        rsp = urllib2.urlopen(url)
        code = rsp.getcode()
    except Exception, e:
        print e

def main():
    global results
    while 1:
        new = commands.getoutput('for i in {'+MIN+'..'+MAX+'}; do ping -c 1 -t 1 '+PREFIX+'.$i | grep "from"; done') #Ping sweep the network to find connected devices
        tmp = re.findall(PREFIX+"\.(\d+)", str(new)) #Pull out IP addresses from the ping results
        if tmp != results:
            for ip in tmp:
                if ip not in results:
                    gotcha = commands.getoutput('nmap -v -A -Pn '+PREFIX+'.'+ip) #nmap new devices found on the network
                    sendDevice(gotcha) #send device record to server
            for r in results:
                if r not in tmp:
                    removeDevice(PREFIX+'.'+r) #remove device if it wasn't found in the latest ping
            results = tmp

class Devices(models.Model):
    device = models.TextField()

####################ADD to urls.py####################
url(r'^new/$', 'lilDevil.views.new', name='new'),
url(r'^listDevices/$', 'lilDevil.views.listDevices', name='listDevices'),
url(r'^remove/(?P*ip*.+)/$', 'lilDevil.views.remove', name='remove'), #REPLACE * with greater/less sign containing brackets

####################views.py####################
from django.http import HttpResponse
from lilDevil.models import Devices
import json

def remove(request, ip):
    try:
        ip = ip.replace('-','.')
        devicelist = Devices.objects.all()
        for d in devicelist:
            if ip in d.device:
                d.delete()
        return HttpResponse(status = 200)
    except Exception, e:
        return HttpResponse(e)

def new(request):
    try:
        encoded = json.loads(request.raw_post_data)
        new = Devices(device=encoded["device"])
        new.save()
        return HttpResponse(status = 200)
    except Exception, e:
        return HttpResponse(e)

def listDevices(request):
    try:
        json_string = '{"devices": ['
        devicelist = Devices.objects.all()
        first = True
        for d in devicelist:
            if first:
                first = False
            else:
                json_string = json_string + ', '
            json_string = json_string + '{"device": "'+str(d.device)+'"}'

    def flipping(self): #Flip through NMAP scans of detected devices
        t = self.label1.cget("text")
        t = self.label2.cget("image")
        data = getData()
        found = json.loads(data)
        photo = PhotoImage(file="picture.gif")
        if found['devices']:
            for f in found['devices']: #Loop through all but the last item
                fixed = f['device'].replace('%0a', '\n') #return to ASCII value from earlier escaped hex
                self.label1.config(text=fixed)
                self.label1.update()
                self.label2.config(image=photo)
                self.label2.update()
                time.sleep(20)
        else:
            self.label1.config(text="No connected devices")
            self.label1.update()
            time.sleep(20)
        self.after(1, self.flipping())

def getData(): #Get a list of devices from server
    url = "http://127.0.0.1:3707/listDevices/" #server address
    response = urllib2.urlopen(url)
    code = response.getcode()
    if int(code) == 200:
        return response.read()
    else:
        return