1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
# coding: utf-8
# This file is a part of VK4XMPP transport
# © simpleApps, 2014 — 2015.
from hashlib import sha1
import xmpp
"""
Implements XEP-0158: CAPTCHA Forms
"""
def sendCaptcha(user, captcha):
"""
Send a captcha to the user
Args:
user: the user's jid
captcha: captcha dictionary ({"url": "https://vk.com/...", "sid": "10"})
"""
url = captcha.get("img")
sid = captcha.get("sid")
logger.debug("VK: sending message with captchaXMPP (jid: %s)", user)
body = _("WARNING: VK has sent you a CAPTCHA."
" Please, follow the link: %s and enter the text shown on the image to the chat."
" Example: !captchaXMPP my_captcha_key."
"\nWarning: don't use Firefox to open the link.") % url
msg = xmpp.Message(user, body, "chat", frm=TransportID)
x = msg.setTag("x", namespace=xmpp.NS_OOB)
x.setTagData("url", url)
captchaNode = msg.setTag("captchaXMPP", namespace=xmpp.NS_CAPTCHA)
image = utils.getLinkData(url, False)
if image:
hash = sha1(image).hexdigest()
encoded = image.encode("base64")
payload = [xmpp.Node("required"),
xmpp.Node("media", {"xmlns": xmpp.NS_MEDIA},
[xmpp.Node("uri", {"type": "image/jpg"},
["cid:sha1+%s@bob.xmpp.org" % hash])])] # feel yourself like a erlang programmer
fields = [{"var": "FORM_TYPE", "value": xmpp.NS_CAPTCHA, "type": "hidden"}]
fields.append({"var": "from", "value": TransportID, "type": "hidden"})
fields.append({"var": "challenge", "value": msg.getID(), "type": "hidden"})
fields.append({"var": "ocr", "label": _("Enter shown text"), "payload": payload})
form = utils.buildDataForm(type="form", fields=fields)
captchaNode.addChild(node=form)
oob = msg.setTag("data", {"cid": "sha1+%s@bob.xmpp.org" % hash, "type": "image/jpg", "max-age": "0"}, xmpp.NS_URN_OOB)
oob.setData(encoded)
else:
logger.warning("unable to get the image from %s (jid: %s)", url, user)
msg.setID(sid)
sender(Component, msg)
sendPresence(user, TransportID, show="xa", reason=body, hash=USER_CAPS_HASH)
TransportFeatures.update({xmpp.NS_OOB,
xmpp.NS_MEDIA,
xmpp.NS_CAPTCHA,
xmpp.NS_URN_OOB})
registerHandler("evt04", sendCaptcha)
|
