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annotate sat/plugins/plugin_xep_0103.py @ 3914:4cb38c8312a1

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plugin XEP-0384, xml_tools: avoid `getItems` timeout + fix empty node crash + parsing: - use `max_items` in `getItems` calls for bundles, as otherwise some pubsub service may return full nodes, which may be huge is `max_items=1` is not set on the node, possibly resulting in timeouts. - the plugin was crashing when TWOMEMO devices list node has no items at all. This is not the case anymore. - a naive parsing method has been implemented in `xml_tools` to replace the serialisation/deserialisation method. This should be more efficient and will avoid annoying `ns0:` prefixes in XML logs.
author Goffi <goffi@goffi.org>
date Sat, 24 Sep 2022 16:37:46 +0200
parents eb0a77bea363
children 524856bd7b19
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eb0a77bea363 plugin XEP-0103: URL Address Information implementation:
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1 #!/usr/bin/env python3
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2
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3 # Copyright (C) 2009-2022 Jérôme Poisson (goffi@goffi.org)
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4
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5 # This program is free software: you can redistribute it and/or modify
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6 # it under the terms of the GNU Affero General Public License as published by
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7 # the Free Software Foundation, either version 3 of the License, or
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8 # (at your option) any later version.
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9
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10 # This program is distributed in the hope that it will be useful,
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11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 # GNU Affero General Public License for more details.
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14
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15 # You should have received a copy of the GNU Affero General Public License
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16 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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17
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18 from typing import Dict, Any
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19
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20 from twisted.words.xish import domish
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21
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22 from sat.core.constants import Const as C
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23 from sat.core.i18n import _
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24 from sat.core.log import getLogger
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25 from sat.core import exceptions
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26
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27 log = getLogger(__name__)
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28
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29
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30 PLUGIN_INFO = {
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31 C.PI_NAME: "URL Address Information",
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32 C.PI_IMPORT_NAME: "XEP-0103",
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33 C.PI_TYPE: "XEP",
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34 C.PI_MODES: C.PLUG_MODE_BOTH,
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35 C.PI_PROTOCOLS: ["XEP-0103"],
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36 C.PI_MAIN: "XEP_0103",
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37 C.PI_HANDLER: "no",
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38 C.PI_DESCRIPTION: _("""Implementation of XEP-0103 (URL Address Information)"""),
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39 }
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40
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41 NS_URL_DATA = "http://jabber.org/protocol/url-data"
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42
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43
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44 class XEP_0103:
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45 namespace = NS_URL_DATA
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46
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47 def __init__(self, host):
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48 log.info(_("XEP-0103 (URL Address Information) plugin initialization"))
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49 host.registerNamespace("url-data", NS_URL_DATA)
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50
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51 def get_url_data_elt(
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52 self,
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53 url: str,
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54 **kwargs
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55 ) -> domish.Element:
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56 """Generate the element describing the URL
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57
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58 @param url: URL to use
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59 @param extra: extra metadata describing how to access the URL
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60 @return: ``<url-data/>`` element
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61 """
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62 url_data_elt = domish.Element((NS_URL_DATA, "url-data"))
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63 url_data_elt["target"] = url
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64 return url_data_elt
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65
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66 def parse_url_data_elt(
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67 self,
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68 url_data_elt: domish.Element
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69 ) -> Dict[str, Any]:
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70 """Parse <url-data/> element
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71
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72 @param url_data_elt: <url-data/> element
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73 a parent element can also be used
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74 @return: url-data data. It's a dict whose keys correspond to
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75 [get_url_data_elt] parameters
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76 @raise exceptions.NotFound: no <url-data/> element has been found
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77 """
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78 if url_data_elt.name != "url-data":
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79 try:
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80 url_data_elt = next(
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81 url_data_elt.elements(NS_URL_DATA, "url-data")
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82 )
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83 except StopIteration:
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84 raise exceptions.NotFound
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85 try:
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86 data: Dict[str, Any] = {"url": url_data_elt["target"]}
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87 except KeyError:
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88 raise ValueError(f'"target" attribute is missing: {url_data_elt.toXml}')
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89
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90 return data