Mercurial > libervia-backend
annotate src/plugins/plugin_xep_0047.py @ 853:c2f6ada7858f
core (sqlite): automatic database update:
- new Updater class check database consistency (by calculating a hash on the .schema), and updates base if necessary
- database now has a version (1 for current, 0 will be for 0.3's database), for each change this version will be increased
- creation statements and update statements are in the form of dict of dict with tuples. There is a help text at the top of the module to explain how it works
- if we are on a development version, the updater try to update the database automaticaly (without deleting table or columns). The Updater.generateUpdateData method can be used to ease the creation of update data (i.e. the dictionary at the top, see the one for the key 1 for an example).
- if there is an inconsistency, an exception is raised, and a message indicate the SQL statements that should fix the situation.
- well... this is rather complicated, a KISS method would maybe have been better. The future will say if we need to simplify it :-/
- new DatabaseError exception
author | Goffi <goffi@goffi.org> |
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date | Sun, 23 Feb 2014 23:30:32 +0100 |
parents | 1fe00f0c9a91 |
children | c6d8fc63b1db |
rev | line source |
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1 #!/usr/bin/python |
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2 # -*- coding: utf-8 -*- |
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4 # SAT plugin for managing gateways (xep-0047) |
811 | 5 # Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Jérôme Poisson (goffi@goffi.org) |
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7 # This program is free software: you can redistribute it and/or modify |
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8 # it under the terms of the GNU Affero General Public License as published by |
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9 # the Free Software Foundation, either version 3 of the License, or |
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10 # (at your option) any later version. |
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11 |
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12 # This program is distributed in the hope that it will be useful, |
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 # GNU Affero General Public License for more details. |
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16 |
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17 # You should have received a copy of the GNU Affero General Public License |
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>. |
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19 |
771 | 20 from sat.core.i18n import _ |
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21 from logging import debug, info, warning, error |
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22 from twisted.words.protocols.jabber import client as jabber_client, jid |
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23 from twisted.words.xish import domish |
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24 import twisted.internet.error |
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25 from twisted.internet import reactor |
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26 from sat.core.exceptions import ProfileNotInCacheError |
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27 |
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28 from wokkel import disco, iwokkel |
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29 |
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30 from zope.interface import implements |
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31 |
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32 import base64 |
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33 |
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34 try: |
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35 from twisted.words.protocols.xmlstream import XMPPHandler |
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36 except ImportError: |
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37 from wokkel.subprotocols import XMPPHandler |
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38 |
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39 MESSAGE = '/message' |
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40 IQ_SET = '/iq[@type="set"]' |
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41 NS_IBB = 'http://jabber.org/protocol/ibb' |
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42 IBB_OPEN = IQ_SET + '/open[@xmlns="' + NS_IBB + '"]' |
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43 IBB_CLOSE = IQ_SET + '/close[@xmlns="' + NS_IBB + '" and @sid="%s"]' |
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44 IBB_IQ_DATA = IQ_SET + '/data[@xmlns="' + NS_IBB + '" and @sid="%s"]' |
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45 IBB_MESSAGE_DATA = MESSAGE + '/data[@xmlns="' + NS_IBB + '" and @sid="%s"]' |
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46 TIMEOUT = 60 # timeout for workflow |
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47 BLOCK_SIZE = 4096 |
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48 |
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49 PLUGIN_INFO = { |
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50 "name": "In-Band Bytestream Plugin", |
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51 "import_name": "XEP-0047", |
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52 "type": "XEP", |
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53 "protocols": ["XEP-0047"], |
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54 "main": "XEP_0047", |
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55 "handler": "yes", |
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56 "description": _("""Implementation of In-Band Bytestreams""") |
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57 } |
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58 |
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59 |
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60 class XEP_0047(object): |
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61 NAMESPACE = NS_IBB |
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62 |
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63 def __init__(self, host): |
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64 info(_("In-Band Bytestreams plugin initialization")) |
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65 self.host = host |
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66 |
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67 def getHandler(self, profile): |
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68 return XEP_0047_handler(self) |
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69 |
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70 def profileConnected(self, profile): |
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71 client = self.host.getClient(profile) |
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72 if not client: |
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73 raise ProfileNotInCacheError |
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74 client.xep_0047_current_stream = {} # key: stream_id, value: data(dict) |
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75 |
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76 def _timeOut(self, sid, profile): |
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77 """Delecte current_stream id, called after timeout |
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78 @param id: id of client.xep_0047_current_stream""" |
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79 info(_("In-Band Bytestream: TimeOut reached for id %(sid)s [%(profile)s]") |
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80 % {"sid": sid, "profile": profile}) |
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81 self._killId(sid, False, "TIMEOUT", profile) |
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82 |
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83 def _killId(self, sid, success=False, failure_reason="UNKNOWN", profile=None): |
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84 """Delete an current_stream id, clean up associated observers |
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85 @param sid: id of client.xep_0047_current_stream""" |
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86 assert(profile) |
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87 client = self.host.getClient(profile) |
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88 if not client: |
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89 warning(_("Client no more in cache")) |
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90 return |
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91 if sid not in client.xep_0047_current_stream: |
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92 warning(_("kill id called on a non existant id")) |
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93 return |
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94 if "observer_cb" in client.xep_0047_current_stream[sid]: |
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95 client.xmlstream.removeObserver(client.xep_0047_current_stream[sid]["event_data"], client.xep_0047_current_stream[sid]["observer_cb"]) |
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96 if client.xep_0047_current_stream[sid]['timer'].active(): |
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97 client.xep_0047_current_stream[sid]['timer'].cancel() |
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98 if "size" in client.xep_0047_current_stream[sid]: |
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99 self.host.removeProgressCB(sid, profile) |
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100 |
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101 file_obj = client.xep_0047_current_stream[sid]['file_obj'] |
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102 success_cb = client.xep_0047_current_stream[sid]['success_cb'] |
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103 failure_cb = client.xep_0047_current_stream[sid]['failure_cb'] |
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104 |
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105 del client.xep_0047_current_stream[sid] |
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106 |
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107 if success: |
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108 success_cb(sid, file_obj, NS_IBB, profile) |
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109 else: |
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110 failure_cb(sid, file_obj, NS_IBB, failure_reason, profile) |
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111 |
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112 def getProgress(self, sid, data, profile): |
391 | 113 """Fill data with position of current transfer""" |
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114 client = self.host.getClient(profile) |
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115 if not client: |
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116 raise ProfileNotInCacheError |
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117 try: |
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118 file_obj = client.xep_0047_current_stream[sid]["file_obj"] |
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119 data["position"] = str(file_obj.tell()) |
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120 data["size"] = str(client.xep_0047_current_stream[sid]["size"]) |
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121 except: |
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122 pass |
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123 |
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124 def prepareToReceive(self, from_jid, sid, file_obj, size, success_cb, failure_cb, profile): |
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125 """Called when a bytestream is imminent |
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126 @param from_jid: jid of the sender |
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127 @param sid: Stream id |
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128 @param file_obj: File object where data will be written |
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129 @param size: full size of the data, or None if unknown |
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130 @param success_cb: method to call when successfuly finished |
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131 @param failure_cb: method to call when something goes wrong |
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132 @param profile: %(doc_profile)s""" |
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133 client = self.host.getClient(profile) |
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134 if not client: |
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135 raise ProfileNotInCacheError |
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136 data = client.xep_0047_current_stream[sid] = {} |
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137 data["from"] = from_jid |
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138 data["file_obj"] = file_obj |
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139 data["seq"] = -1 |
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140 if size: |
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141 data["size"] = size |
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142 self.host.registerProgressCB(sid, self.getProgress, profile) |
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143 data["timer"] = reactor.callLater(TIMEOUT, self._timeOut, sid) |
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144 data["success_cb"] = success_cb |
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145 data["failure_cb"] = failure_cb |
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146 |
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147 def streamOpening(self, IQ, profile): |
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148 debug(_("IBB stream opening")) |
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149 IQ.handled = True |
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150 client = self.host.getClient(profile) |
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151 if not client: |
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152 raise ProfileNotInCacheError |
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153 open_elt = IQ.firstChildElement() |
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154 block_size = open_elt.getAttribute('block-size') |
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155 sid = open_elt.getAttribute('sid') |
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156 stanza = open_elt.getAttribute('stanza', 'iq') |
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157 if not sid or not block_size or int(block_size) > 65535: |
391 | 158 warning(_("malformed IBB transfer: %s" % IQ['id'])) |
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159 self.sendNotAcceptableError(IQ['id'], IQ['from'], client.xmlstream) |
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160 return |
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161 if not sid in client.xep_0047_current_stream: |
391 | 162 warning(_("Ignoring unexpected IBB transfer: %s" % sid)) |
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163 self.sendNotAcceptableError(IQ['id'], IQ['from'], client.xmlstream) |
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164 return |
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165 if client.xep_0047_current_stream[sid]["from"] != jid.JID(IQ['from']): |
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166 warning(_("sended jid inconsistency (man in the middle attack attempt ?)")) |
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167 self.sendNotAcceptableError(IQ['id'], IQ['from'], client.xmlstream) |
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168 self._killId(sid, False, "PROTOCOL_ERROR", profile=profile) |
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169 return |
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170 |
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171 #at this stage, the session looks ok and will be accepted |
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172 |
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173 #we reset the timeout: |
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174 client.xep_0047_current_stream[sid]["timer"].reset(TIMEOUT) |
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175 |
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176 #we save the xmlstream, events and observer data to allow observer removal |
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177 client.xep_0047_current_stream[sid]["event_data"] = event_data = (IBB_MESSAGE_DATA if stanza == 'message' else IBB_IQ_DATA) % sid |
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178 client.xep_0047_current_stream[sid]["observer_cb"] = observer_cb = self.messageData if stanza == 'message' else self.iqData |
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179 event_close = IBB_CLOSE % sid |
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180 #we now set the stream observer to look after data packet |
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181 client.xmlstream.addObserver(event_data, observer_cb, profile=profile) |
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182 client.xmlstream.addOnetimeObserver(event_close, self.streamClosing, profile=profile) |
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183 #finally, we send the accept stanza |
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184 result = domish.Element((None, 'iq')) |
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185 result['type'] = 'result' |
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186 result['id'] = IQ['id'] |
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187 result['to'] = IQ['from'] |
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188 client.xmlstream.send(result) |
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189 |
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190 def streamClosing(self, IQ, profile): |
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191 IQ.handled = True |
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192 client = self.host.getClient(profile) |
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193 if not client: |
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194 raise ProfileNotInCacheError |
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195 debug(_("IBB stream closing")) |
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196 data_elt = IQ.firstChildElement() |
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197 sid = data_elt.getAttribute('sid') |
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198 result = domish.Element((None, 'iq')) |
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199 result['type'] = 'result' |
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200 result['id'] = IQ['id'] |
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201 result['to'] = IQ['from'] |
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202 client.xmlstream.send(result) |
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203 self._killId(sid, success=True, profile=profile) |
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204 |
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205 def iqData(self, IQ, profile): |
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206 IQ.handled = True |
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207 client = self.host.getClient(profile) |
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208 if not client: |
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209 raise ProfileNotInCacheError |
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210 data_elt = IQ.firstChildElement() |
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211 |
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212 if self._manageDataElt(data_elt, 'iq', IQ['id'], jid.JID(IQ['from']), profile): |
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213 #and send a success answer |
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214 result = domish.Element((None, 'iq')) |
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215 result['type'] = 'result' |
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216 result['id'] = IQ['id'] |
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217 result['to'] = IQ['from'] |
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218 |
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219 client.xmlstream.send(result) |
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220 |
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221 def messageData(self, message_elt, profile): |
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222 data_elt = message_elt.firstChildElement() |
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223 sid = message_elt.getAttribute('id', '') |
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224 self._manageDataElt(message_elt, 'message', sid, jid.JID(message_elt['from']), profile) |
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225 |
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226 def _manageDataElt(self, data_elt, stanza, sid, stanza_from_jid, profile): |
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227 """Manage the data elelement (check validity and write to the file_obj) |
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228 @param data_elt: "data" domish element |
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229 @return: True if success""" |
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230 client = self.host.getClient(profile) |
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231 if not client: |
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232 raise ProfileNotInCacheError |
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233 sid = data_elt.getAttribute('sid') |
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234 if sid not in client.xep_0047_current_stream: |
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235 error(_("Received data for an unknown session id")) |
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236 return False |
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237 |
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238 from_jid = client.xep_0047_current_stream[sid]["from"] |
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239 file_obj = client.xep_0047_current_stream[sid]["file_obj"] |
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240 |
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241 if stanza_from_jid != from_jid: |
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242 warning(_("sended jid inconsistency (man in the middle attack attempt ?)")) |
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243 if stanza == 'iq': |
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244 self.sendNotAcceptableError(sid, from_jid, client.xmlstream) |
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245 return False |
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246 |
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247 client.xep_0047_current_stream[sid]["seq"] += 1 |
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248 if int(data_elt.getAttribute("seq", -1)) != client.xep_0047_current_stream[sid]["seq"]: |
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249 warning(_("Sequence error")) |
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250 if stanza == 'iq': |
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251 self.sendNotAcceptableError(data_elt["id"], from_jid, client.xmlstream) |
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252 return False |
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253 |
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254 #we reset the timeout: |
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255 client.xep_0047_current_stream[sid]["timer"].reset(TIMEOUT) |
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256 |
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257 #we can now decode the data |
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258 try: |
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259 file_obj.write(base64.b64decode(str(data_elt))) |
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260 except TypeError: |
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261 #The base64 data is invalid |
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262 warning(_("Invalid base64 data")) |
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263 if stanza == 'iq': |
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264 self.sendNotAcceptableError(data_elt["id"], from_jid, client.xmlstream) |
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265 return False |
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266 return True |
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267 |
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268 def sendNotAcceptableError(self, iq_id, to_jid, xmlstream): |
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269 """Not acceptable error used when the stream is not expected or something is going wrong |
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270 @param iq_id: IQ id |
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271 @param to_jid: addressee |
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272 @param xmlstream: XML stream to use to send the error""" |
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273 result = domish.Element((None, 'iq')) |
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274 result['type'] = 'result' |
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275 result['id'] = iq_id |
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276 result['to'] = to_jid |
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277 error_el = result.addElement('error') |
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278 error_el['type'] = 'cancel' |
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279 error_el.addElement(('urn:ietf:params:xml:ns:xmpp-stanzas', 'not-acceptable')) |
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280 xmlstream.send(result) |
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281 |
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282 def startStream(self, file_obj, to_jid, sid, length, successCb, failureCb, size=None, profile=None): |
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283 """Launch the stream workflow |
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284 @param file_obj: file_obj to send |
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285 @param to_jid: JID of the recipient |
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286 @param sid: Stream session id |
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287 @param length: number of byte to send, or None to send until the end |
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288 @param successCb: method to call when stream successfuly finished |
389 | 289 @param failureCb: method to call when something goes wrong |
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290 @param profile: %(doc_profile)s""" |
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291 client = self.host.getClient(profile) |
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292 if not client: |
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293 raise ProfileNotInCacheError |
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294 if length is not None: |
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295 error(_('stream length not managed yet')) |
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296 return |
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297 data = client.xep_0047_current_stream[sid] = {} |
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298 data["timer"] = reactor.callLater(TIMEOUT, self._timeOut, sid) |
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299 data["file_obj"] = file_obj |
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300 data["to"] = to_jid |
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301 data["success_cb"] = successCb |
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302 data["failure_cb"] = failureCb |
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303 data["block_size"] = BLOCK_SIZE |
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304 if size: |
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305 data["size"] = size |
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306 self.host.registerProgressCB(sid, self.getProgress, profile) |
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307 iq_elt = jabber_client.IQ(client.xmlstream, 'set') |
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308 iq_elt['from'] = client.jid.full() |
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309 iq_elt['to'] = to_jid.full() |
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310 open_elt = iq_elt.addElement('open', NS_IBB) |
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311 open_elt['block-size'] = str(BLOCK_SIZE) |
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312 open_elt['sid'] = sid |
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313 open_elt['stanza'] = 'iq' |
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314 iq_elt.addCallback(self.iqResult, sid, 0, length, profile) |
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315 iq_elt.send() |
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316 |
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317 def iqResult(self, sid, seq, length, profile, iq_elt): |
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318 """Called when the result of open iq is received""" |
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319 client = self.host.getClient(profile) |
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320 if not client: |
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321 raise ProfileNotInCacheError |
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322 data = client.xep_0047_current_stream[sid] |
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323 if iq_elt["type"] == "error": |
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324 warning(_("Transfer failed")) |
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325 self.terminateStream(sid, "IQ_ERROR") |
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326 return |
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327 |
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328 if data['timer'].active(): |
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329 data['timer'].cancel() |
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330 |
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331 buffer = data["file_obj"].read(data["block_size"]) |
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332 if buffer: |
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333 next_iq_elt = jabber_client.IQ(client.xmlstream, 'set') |
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334 next_iq_elt['to'] = data["to"].full() |
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335 data_elt = next_iq_elt.addElement('data', NS_IBB) |
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336 data_elt['seq'] = str(seq) |
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337 data_elt['sid'] = sid |
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338 data_elt.addContent(base64.b64encode(buffer)) |
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339 next_iq_elt.addCallback(self.iqResult, sid, seq + 1, length, profile) |
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340 next_iq_elt.send() |
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341 else: |
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342 self.terminateStream(sid, profile=profile) |
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343 |
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344 def terminateStream(self, sid, failure_reason=None, profile=None): |
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345 """Terminate the stream session |
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346 @param to_jid: recipient |
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347 @param sid: Session id |
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348 @param file_obj: file object used |
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349 @param xmlstream: XML stream used with this session |
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350 @param progress_cb: True if we have to remove the progress callback |
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351 @param callback: method to call after finishing |
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352 @param failure_reason: reason of the failure, or None if steam was successful""" |
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353 client = self.host.getClient(profile) |
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354 if not client: |
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355 raise ProfileNotInCacheError |
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356 data = client.xep_0047_current_stream[sid] |
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357 iq_elt = jabber_client.IQ(client.xmlstream, 'set') |
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358 iq_elt['to'] = data["to"].full() |
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359 close_elt = iq_elt.addElement('close', NS_IBB) |
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360 close_elt['sid'] = sid |
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361 iq_elt.send() |
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362 self.host.removeProgressCB(sid, profile) |
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363 if failure_reason: |
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364 self._killId(sid, False, failure_reason, profile=profile) |
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365 else: |
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366 self._killId(sid, True, profile=profile) |
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367 |
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368 |
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369 class XEP_0047_handler(XMPPHandler): |
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370 implements(iwokkel.IDisco) |
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371 |
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372 def __init__(self, parent): |
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373 self.plugin_parent = parent |
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374 |
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375 def connectionInitialized(self): |
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376 self.xmlstream.addObserver(IBB_OPEN, self.plugin_parent.streamOpening, profile=self.parent.profile) |
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377 |
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378 def getDiscoInfo(self, requestor, target, nodeIdentifier=''): |
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379 return [disco.DiscoFeature(NS_IBB)] |
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380 |
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381 def getDiscoItems(self, requestor, target, nodeIdentifier=''): |
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382 return [] |