code.delx.au - pymsnt/blob - src/ft.py

   1 # Copyright 2005 James Bunton <james@delx.cjb.net>
   2 # Licensed for distribution under the GPL version 2, check COPYING for details
   3
   4 from tlib.xmlw import Element
   5 from twisted.internet import protocol
   6
   7 import disco
   8 from debug import LogEvent, INFO, WARN, ERROR
   9 import config
  10 import utils
  11
  12 import random
  13 import sys
  14
  15
  16 ###########
  17 # Sending #
  18 ###########
  19
  20 class FTSend:
  21         """ For file transfers going from Jabber to MSN. """
  22         def __init__(self, startTransfer, cancelTransfer, filename, filesize):
  23                 self.startTransfer = startTransfer
  24                 self.cancelTransfer = cancelTransfer
  25                 self.filename = filename
  26                 self.filesize = filesize
  27
  28         def accept(self, legacyFileSend):
  29                 self.startTransfer(legacyFileSend)
  30
  31         def reject(self):
  32                 del self.startTransfer
  33                 self.cancelTransfer
  34
  35
  36 try:
  37         from twisted.web import http
  38 except ImportError:
  39         try:
  40                 from twisted.protocols import http
  41         except ImportError:
  42                 print "Couldn't find http.HTTPClient. If you're using Twisted 2.0, make sure that you've installed twisted.web"
  43                 raise
  44
  45
  46 class OOBHeaderHelper(http.HTTPClient):
  47         """ Makes a HEAD request and grabs the length """
  48         def connectionMade(self):
  49                 self.sendCommand("HEAD", self.factory.path.encode("utf-8"))
  50                 self.sendHeader("Host", (self.factory.host + ":" + str(self.factory.port)).encode("utf-8"))
  51                 self.endHeaders()
  52
  53         def handleEndHeaders(self):
  54                 self.factory.gotLength(self.length)
  55
  56         def handleResponse(self, data):
  57                 pass
  58
  59
  60 class OOBSendConnector(http.HTTPClient):
  61         def connectionMade(self):
  62                 self.sendCommand("GET", self.factory.path.encode("utf-8"))
  63                 self.sendHeader("Host", (self.factory.host + ":" + str(self.factory.port)).encode("utf-8"))
  64                 self.endHeaders()
  65                 self.first = True
  66
  67         def handleResponsePart(self, data):
  68                 self.factory.consumer.write(data)
  69
  70         def handleResponseEnd(self):
  71                 # This is called once before writing is finished, and once when the
  72                 # connection closes. We only consumer.close() on the second.
  73                 if self.first:
  74                         self.first = False
  75                 else:
  76                         self.factory.consumer.close()
  77                         self.factory.consumer = None
  78                         self.factory.finished()
  79
  80
  81
  82
  83
  84 #############
  85 # Receiving #
  86 #############
  87
  88 class FTReceive:
  89         """ For file transfers going from MSN to Jabber. """
  90
  91         """
  92         Plan of action for this class:
  93         * Determine the FT support of the Jabber client.
  94         * If we find a common protocol, then send the invitation.
  95         * Tell the legacyftp object the result of the invitation.
  96         * If it was accepted, then start the transfer.
  97
  98         """
  99
 100         def __init__(self, session, senderJID, legacyftp):
 101                 self.session = session
 102                 self.toJID = self.session.jabberID + "/" + self.session.highestResource()
 103                 self.senderJID = senderJID
 104                 self.ident = (self.toJID, self.senderJID)
 105                 self.legacyftp = legacyftp
 106                 LogEvent(INFO)
 107                 self.checkSupport()
 108
 109         def checkSupport(self):
 110                 def discoDone(features):
 111                         LogEvent(INFO, self.ident)
 112                         enabledS5B = hasattr(self.session.pytrans, "ftSOCKS5")
 113                         enabledOOB = hasattr(self.session.pytrans, "ftOOB")
 114                         hasFT  = features.count(disco.FT)
 115                         hasS5B = features.count(disco.S5B)
 116                         hasOOB = features.count(disco.IQOOB)
 117                         LogEvent(INFO, self.ident, "Choosing transfer mode.")
 118                         if hasFT > 0 and hasS5B > 0 and enabledS5B:
 119                                 self.socksMode()
 120                         elif hasOOB > 0 and enabledOOB:
 121                                 self.oobMode()
 122                         elif enabledOOB:
 123                                 self.messageOobMode()
 124                         else:
 125                                 # No support
 126                                 self.legacyftp.reject()
 127                                 del self.legacyftp
 128
 129                 def discoFail(err=None):
 130                         LogEvent(INFO, self.ident, str(err))
 131                         self.messageOobMode()
 132
 133                 d = disco.DiscoRequest(self.session.pytrans, self.toJID).doDisco()
 134                 d.addCallbacks(discoDone, discoFail)
 135
 136         def socksMode(self):
 137                 def ftReply(el):
 138                         if el.getAttribute("type") != "result":
 139                                 ftDeclined()
 140                                 return
 141                         self.session.pytrans.ftSOCKS5.addConnection(utils.socks5Hash(self.sid, self.senderJID, self.toJID), self.legacyftp)
 142                         LogEvent(INFO, self.ident)
 143                         iq = Element((None, "iq"))
 144                         iq.attributes["type"] = "set"
 145                         iq.attributes["to"] = self.toJID
 146                         iq.attributes["from"] = self.senderJID
 147                         query = iq.addElement("query")
 148                         query.attributes["xmlns"] = disco.S5B
 149                         query.attributes["sid"] = self.sid
 150                         query.attributes["mode"] = "tcp"
 151                         streamhost = query.addElement("streamhost")
 152                         streamhost.attributes["jid"] = self.senderJID
 153                         streamhost.attributes["host"] = config.ip
 154                         streamhost.attributes["port"] = config.ftJabberPort
 155                         d = self.session.pytrans.discovery.sendIq(iq)
 156                         d.addErrback(ftDeclined) # Timeout
 157
 158                 def ftDeclined(el):
 159                         self.legacyftp.reject()
 160                         del self.legacyftp
 161
 162                 LogEvent(INFO, self.ident)
 163                 self.sid = str(random.randint(1000, sys.maxint))
 164                 iq = Element((None, "iq"))
 165                 iq.attributes["type"] = "set"
 166                 iq.attributes["to"] = self.toJID
 167                 iq.attributes["from"] = self.senderJID
 168                 si = iq.addElement("si")
 169                 si.attributes["xmlns"] = disco.SI
 170                 si.attributes["profile"] = disco.FT
 171                 si.attributes["id"] = self.sid
 172                 file = si.addElement("file")
 173                 file.attributes["xmlns"] = disco.FT
 174                 file.attributes["size"] = str(self.legacyftp.filesize)
 175                 file.attributes["name"] = self.legacyftp.filename
 176                 # Feature negotiation
 177                 feature = si.addElement("feature")
 178                 feature.attributes["xmlns"] = disco.FEATURE_NEG
 179                 x = feature.addElement("x")
 180                 x.attributes["xmlns"] = "jabber:x:data"
 181                 x.attributes["type"] = "form"
 182                 field = x.addElement("field")
 183                 field.attributes["type"] = "list-single"
 184                 field.attributes["var"] = "stream-method"
 185                 option = field.addElement("option")
 186                 value = option.addElement("value")
 187                 value.addContent(disco.S5B)
 188                 d = self.session.pytrans.discovery.sendIq(iq, 60*3)
 189                 d.addCallback(ftReply)
 190                 d.addErrback(ftDeclined)
 191
 192         def oobMode(self):
 193                 def cb(el):
 194                         if el.getAttribute("type") != "result":
 195                                 self.legacyftp.reject()
 196                         del self.legacyftp
 197                         self.session.pytrans.ftOOB.remFile(filename)
 198
 199                 def ecb(ignored=None):
 200                         self.legacyftp.reject()
 201                         del self.legacyftp
 202
 203                 LogEvent(INFO, self.ident)
 204                 filename = self.session.pytrans.ftOOB.putFile(self, self.legacyftp.filename)
 205                 iq = Element((None, "iq"))
 206                 iq.attributes["to"] = self.toJID
 207                 iq.attributes["from"] = self.senderJID
 208                 query = m.addElement("query")
 209                 query.attributes["xmlns"] = disco.IQOOB
 210                 query.addElement("url").addContent(config.ftOOBRoot + "/" + filename)
 211                 d = self.session.send(iq)
 212                 d.addCallbacks(cb, ecb)
 213
 214         def messageOobMode(self):
 215                 LogEvent(INFO, self.ident)
 216                 filename = self.session.pytrans.ftOOB.putFile(self, self.legacyftp.filename)
 217                 m = Element((None, "message"))
 218                 m.attributes["to"] = self.session.jabberID
 219                 m.attributes["from"] = self.senderJID
 220                 m.addElement("body").addContent(config.ftOOBRoot + "/" + filename)
 221                 x = m.addElement("x")
 222                 x.attributes["xmlns"] = disco.XOOB
 223                 x.addElement("url").addContent(config.ftOOBRoot + "/" + filename)
 224                 self.session.pytrans.send(m)
 225
 226         def error(self, ignored=None):
 227                 # FIXME
 228                 LogEvent(WARN)
 229
 230
 231
 232 # SOCKS5
 233
 234 from tlib import socks5
 235
 236 class JEP65Connection(socks5.SOCKSv5):
 237         def __init__(self, listener):
 238                 socks5.SOCKSv5.__init__(self)
 239                 self.listener = listener
 240                 self.supportedAuthMechs = [socks5.AUTHMECH_ANON]
 241                 self.supportedAddrs = [socks5.ADDR_DOMAINNAME]
 242                 self.enabledCommands = [socks5.CMD_CONNECT]
 243                 self.addr = ""
 244
 245         def connectRequested(self, addr, port):
 246                 # So that the legacyftp can close the connection
 247                 self.transport.close = self.transport.loseConnection
 248
 249                 # Check for special connect to the namespace -- this signifies that
 250                 # the client is just checking that it can connect to the streamhost
 251                 if addr == disco.S5B:
 252                         self.connectCompleted(addr, 0)
 253                         self.transport.loseConnection()
 254                         return
 255
 256                 self.addr = addr
 257
 258                 if self.listener.isActive(addr):
 259                         self.sendErrorReply(socks5.REPLY_CONN_NOT_ALLOWED)
 260                         return
 261
 262                 if self.listener.addConnection(addr, self):
 263                         self.connectCompleted(addr, 0)
 264                 else:
 265                         self.sendErrorReply(socks5.REPLY_CONN_REFUSED)
 266
 267         def connectionLost(self, reason):
 268                 if self.state == socks5.STATE_CONNECT_PENDING:
 269                         self.listener.removePendingConnection(self.addr, self)
 270                 else:
 271                         self.transport.unregisterProducer()
 272                         if self.peersock != None:
 273                                 self.peersock.peersock = None
 274                                 self.peersock.transport.unregisterProducer()
 275                                 self.peersock = None
 276                                 self.listener.removeActiveConnection(self.addr)
 277
 278 class Proxy65(protocol.Factory):
 279         def __init__(self, port):
 280                 LogEvent(INFO)
 281                 reactor.listenTCP(port, self)
 282                 self.pendingConns = {}
 283                 self.activeConns = {}
 284
 285         def buildProtocol(self, addr):
 286                 return JEP65Connection(self)
 287
 288         def isActive(self, address):
 289                 return address in self.activeConns
 290
 291         def activateStream(self, address):
 292                 if address in self.pendingConns:
 293                         olist = self.pendingConns[address]
 294                         if len(olist) != 2:
 295                                 LogEvent(WARN, '', "Not exactly two!")
 296                                 return
 297
 298                         assert address not in self.activeConns
 299                         self.activeConns[address] = None
 300
 301                         if not isinstance(olist[0], JEP65Connection):
 302                                 legacyftp = olist[0]
 303                                 connection = olist[1]
 304                         elif not isinstance(olist[1], JEP65Connection):
 305                                 legacyftp = olist[1]
 306                                 connection = olist[0]
 307                         else:
 308                                 LogEvent(WARN, '', "No legacyftp")
 309                                 return
 310
 311                         legacyftp.accept(connection.transport)
 312                 else:
 313                         LogEvent(WARN, '', "No pending connection.")
 314
 315         def addConnection(self, address, connection):
 316                 olist = self.pendingConns.get(address, [])
 317                 if len(olist) <= 1:
 318                         olist.append(connection)
 319                         self.pendingConns[address] = olist
 320                         if len(olist) == 2:
 321                                 self.activateStream(address)
 322                         return True
 323                 else:
 324                         return False
 325
 326         def removePendingConnection(self, address, connection):
 327                 olist = self.pendingConns[address]
 328                 if len(olist) == 1:
 329                         del self.pendingConns[address]
 330                 else:
 331                         olist.remove(connection)
 332
 333         def removeActiveConnection(self, address):
 334                 del self.activeConns[address]
 335
 336
 337 # OOB download server
 338
 339 from twisted.web import server, resource, error
 340 from twisted.internet import reactor
 341
 342 from debug import LogEvent, INFO, WARN, ERROR
 343
 344 class OOBReceiveConnector:
 345         def __init__(self, ftReceive, ftHttpPush):
 346                 self.ftReceive, self.ftHttpPush = ftReceive, ftHttpPush
 347                 self.ftReceive.legacyftp.accept(self)
 348
 349         def write(self, data):
 350                 self.ftHttpPush.write(data)
 351
 352         def close(self):
 353                 self.ftHttpPush.finish()
 354
 355         def error(self):
 356                 self.ftHttpPush.finish()
 357                 self.ftReceive.error()
 358
 359 class FileTransferOOBReceive(resource.Resource):
 360         def __init__(self, port):
 361                 LogEvent(INFO)
 362                 self.isLeaf = True
 363                 self.files = {}
 364                 self.oobSite = server.Site(self)
 365                 reactor.listenTCP(port, self.oobSite)
 366
 367         def putFile(self, file, filename):
 368                 path = str(random.randint(100000000, 999999999))
 369                 filename = (path + "/" + filename).replace("//", "/")
 370                 self.files[filename] = file
 371                 return filename
 372
 373         def remFile(self, filename):
 374                 if self.files.has_key(filename):
 375                         del self.files[filename]
 376
 377         def render_GET(self, request):
 378                 filename = request.path[1:] # Remove the leading /
 379                 if self.files.has_key(filename):
 380                         file = self.files[filename]
 381                         request.setHeader("Content-Length", str(file.legacyftp.filesize))
 382                         request.setHeader("Content-Disposition", "attachment; filename=\"%s\"" % file.legacyftp.filename.encode("utf-8"))
 383                         OOBReceiveConnector(file, request)
 384                         del self.files[filename]
 385                         return server.NOT_DONE_YET
 386                 else:
 387                         page = error.NoResource(message="404 File Not Found")
 388                         return page.render(request)
 389
 390         def render_HEAD(self, request):
 391                 filename = request.path[1:] # Remove the leading /
 392                 if self.files.has_key(filename):
 393                         file = self.files[filename]
 394                         request.setHeader("Content-Length", str(file.legacyftp.filesize))
 395                         request.setHeader("Content-Disposition", "attachment; filename=\"%s\"" % file.legacyftp.filename.encode("utf-8"))
 396                         return ""
 397                 else:
 398                         page = error.NoResource(message="404 File Not Found")
 399                         return page.render(request)
 400
 401