Mercurial > libervia-web
annotate libervia/server/websockets.py @ 1131:9cf592d1e6aa
server: better error handling when a named page mentioned in menu_json is missing
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Tue, 18 Sep 2018 21:16:51 +0200 |
| parents | 28e3eb3bb217 |
| children | 2af117bfe6cc |
| rev | line source |
|---|---|
| 995 | 1 #!/usr/bin/python |
| 2 # -*- coding: utf-8 -*- | |
| 3 | |
| 4 # Libervia: a Salut à Toi frontend | |
| 1054 | 5 # Copyright (C) 2011-2018 Jérôme Poisson <goffi@goffi.org> |
| 995 | 6 |
| 7 # This program is free software: you can redistribute it and/or modify | |
| 8 # it under the terms of the GNU Affero General Public License as published by | |
| 9 # the Free Software Foundation, either version 3 of the License, or | |
| 10 # (at your option) any later version. | |
| 11 | |
| 12 # This program is distributed in the hope that it will be useful, | |
| 13 # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 # GNU Affero General Public License for more details. | |
| 16 | |
| 17 # You should have received a copy of the GNU Affero General Public License | |
| 18 # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 19 | |
| 20 from sat.core.i18n import _ | |
| 21 from sat.core.log import getLogger | |
|
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22 |
| 995 | 23 log = getLogger(__name__) |
| 24 from sat.core import exceptions | |
| 25 | |
| 26 from autobahn.twisted import websocket | |
| 27 from autobahn.twisted import resource as resource | |
| 28 from autobahn.websocket import types | |
| 29 | |
| 30 import json | |
| 31 | |
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32 LIBERVIA_PROTOCOL = "libervia_page" |
| 995 | 33 |
| 34 | |
| 35 class LiberviaPageWSProtocol(websocket.WebSocketServerProtocol): | |
| 36 host = None | |
| 37 tokens_map = {} | |
| 38 | |
| 39 def onConnect(self, request): | |
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40 prefix = LIBERVIA_PROTOCOL + u"_" |
| 995 | 41 for protocol in request.protocols: |
| 42 if protocol.startswith(prefix): | |
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43 token = protocol[len(prefix) :].strip() |
| 995 | 44 if token: |
| 45 break | |
| 46 else: | |
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47 raise types.ConnectionDeny( |
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48 types.ConnectionDeny.NOT_IMPLEMENTED, u"Can't use this subprotocol" |
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49 ) |
| 995 | 50 |
| 51 if token not in self.tokens_map: | |
| 52 log.warning(_(u"Can't activate page socket: unknown token")) | |
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53 raise types.ConnectionDeny( |
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54 types.ConnectionDeny.FORBIDDEN, u"Bad token, please reload page" |
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55 ) |
| 995 | 56 self.token = token |
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57 self.page = self.tokens_map[token]["page"] |
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58 self.request = self.tokens_map[token]["request"] |
| 995 | 59 return protocol |
| 60 | |
| 61 def onOpen(self): | |
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62 log.debug( |
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63 _( |
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64 u"Websocket opened for {page} (token: {token})".format( |
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65 page=self.page, token=self.token |
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66 ) |
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67 ) |
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68 ) |
| 995 | 69 self.request.sendData = self.sendJSONData |
| 70 self.page.onSocketOpen(self.request) | |
| 71 | |
| 72 def onMessage(self, payload, isBinary): | |
| 73 try: | |
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74 data_json = json.loads(payload.decode("utf8")) |
| 995 | 75 except ValueError as e: |
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76 log.warning( |
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77 _(u"Not valid JSON, ignoring data: {msg}\n{data}").format( |
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78 msg=e, data=payload |
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79 ) |
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80 ) |
| 995 | 81 return |
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82 # we request page first, to raise an AttributeError |
| 995 | 83 # if it is not set (which should never happen) |
| 84 page = self.page | |
| 85 try: | |
| 86 cb = page.on_data | |
| 87 except AttributeError: | |
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88 log.warning( |
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89 _( |
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90 u'No "on_data" method set on dynamic page, ignoring data:\n{data}' |
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91 ).format(data=data_json) |
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92 ) |
| 995 | 93 else: |
| 94 cb(page, self.request, data_json) | |
| 95 | |
| 96 def onClose(self, wasClean, code, reason): | |
| 97 try: | |
| 98 token = self.token | |
| 99 except AttributeError: | |
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100 log.warning(_(u"Websocket closed but no token is associated")) |
| 995 | 101 return |
| 102 | |
| 103 self.page.onSocketClose(self.request) | |
| 104 | |
| 105 try: | |
| 106 del self.tokens_map[token] | |
| 107 del self.request.sendData | |
| 108 except (KeyError, AttributeError): | |
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109 raise exceptions.InternalError( |
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110 _(u"Token or sendData doesn't exist, this should never happen!") |
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111 ) |
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112 log.debug( |
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113 _( |
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114 u"Websocket closed for {page} (token: {token}). {reason}".format( |
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115 page=self.page, |
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116 token=self.token, |
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117 reason=u"" |
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118 if wasClean |
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119 else _(u"Reason: {reason}").format(reason=reason), |
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120 ) |
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121 ) |
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122 ) |
| 995 | 123 |
| 124 def sendJSONData(self, type_, **data): | |
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125 assert "type" not in data |
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126 data["type"] = type_ |
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127 self.sendMessage(json.dumps(data, ensure_ascii=False).encode("utf8")) |
| 995 | 128 |
| 129 @classmethod | |
| 130 def getBaseURL(cls, host, secure): | |
| 131 return u"ws{sec}://localhost:{port}".format( | |
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132 sec="s" if secure else "", |
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133 port=cls.host.options["port_https" if secure else "port"], |
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134 ) |
| 995 | 135 |
| 136 @classmethod | |
| 137 def getResource(cls, host, secure): | |
| 138 if cls.host is None: | |
| 139 cls.host = host | |
| 140 factory = websocket.WebSocketServerFactory(cls.getBaseURL(host, secure)) | |
| 141 factory.protocol = cls | |
| 142 return resource.WebSocketResource(factory) | |
| 143 | |
| 144 @classmethod | |
| 145 def registerToken(cls, token, page, request): | |
| 146 if token in cls.tokens_map: | |
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147 raise exceptions.ConflictError(_(u"This token is already registered")) |
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148 cls.tokens_map[token] = {"page": page, "request": request} |