Mercurial > libervia-backend

annotate libervia/backend/plugins/plugin_misc_url_preview.py @ 4281:9e63e02318ec

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core: show warning instead of exception in case of missing dependency when loading plugins
author Goffi <goffi@goffi.org>
date Fri, 12 Jul 2024 18:53:00 +0200
parents 0d7bb4df2343
children
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4103
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1 #!/usr/bin/env python3
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2
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3
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4 # Libervia plugin to handle events
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5 # Copyright (C) 2009-2022 Jérôme Poisson (goffi@goffi.org)
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6
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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
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20 from dataclasses import dataclass
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21 import json
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22 from textwrap import dedent
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23 from typing import Callable, Dict, List, Optional, Union
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24 from urllib import parse
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25 import fnmatch
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26
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27 from lxml import etree
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28 import treq
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29 from twisted.internet import defer
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30
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31 from libervia.backend.core.constants import Const as C
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32 from libervia.backend.core.core_types import SatXMPPEntity
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33 from libervia.backend.core.exceptions import ConflictError
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34 from libervia.backend.core.i18n import _
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35 from libervia.backend.core.log import getLogger
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36 from libervia.backend.tools.common import data_format
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37 from libervia.backend.tools.common.async_utils import async_lru
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38
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39 log = getLogger(__name__)
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40
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41 PLUGIN_INFO = {
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42 C.PI_NAME: "Preview",
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43 C.PI_IMPORT_NAME: "Preview",
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44 C.PI_TYPE: C.PLUG_TYPE_MISC,
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45 C.PI_PROTOCOLS: ["Open Graph", "oEmbed"],
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46 C.PI_DEPENDENCIES: ["TEXT_SYNTAXES"],
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47 C.PI_MAIN: "Preview",
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48 C.PI_HANDLER: "no",
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49 C.PI_DESCRIPTION: dedent(
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50 _(
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51 """\
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52 Retrieves and provides a preview of URLs using various protocols. Initially, it
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53 uses the Open Graph protocol for most web pages. Specialized handlers are
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54 implemented for YouTube using the oEmbed protocol.
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55 """
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56 )
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57 ),
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58 }
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59
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60 OG_TAGS = [
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61 "title",
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62 "type",
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63 "image",
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64 "url",
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65 "audio",
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66 "description",
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67 "determiner",
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68 "locale",
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69 "locale:alternate",
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70 "site_name",
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71 "video",
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72 ]
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73
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74
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75 class PreviewFetchError(Exception):
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76 pass
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77
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78
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79 @dataclass
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80 class Protocol:
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81 name: str
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82 callback: Callable
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83 priority: int
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84
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85
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86 class Preview:
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87 protocols: Dict[str, Protocol] = {}
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88 domain_protocols: Dict[str, str] = {}
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89
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90 def __init__(self, host):
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91 log.info(_("Preview plugin initialization"))
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92 self.host = host
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93
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94 # generic protocols
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95
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96 self.register("open_graph", self.fetch_open_graph_data, priority=100)
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97 self.register("oembed", self.fetch_generic_oembed_data, priority=50)
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98 self.register("generic", self.fetch_generic_data, priority=0)
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99
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100 # domain specific protocols
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101
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102 self.register("oembed-youtube", self.fetch_youtube_oembed_data, priority=-100)
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103 self.register_domain_protocol(
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104 ["www.youtube.com", "youtu.be", "m.youtube.com"], "oembed-youtube"
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105 )
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106
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107 self.register("wikipedia", self.fetch_wikipedia_data, priority=-80)
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108 self.register_domain_protocol(["*.wikipedia.org"], "wikipedia")
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109
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110 self.register("invidious", self.fetch_invidious_data, priority=-90)
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111 self.register_domain_protocol(
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112 ["yewtu.be", "www.yewtu.be", "invidious.fdn.fr"], "invidious"
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113 )
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114
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115 # bridge methods
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116
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117 host.bridge.add_method(
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118 "url_preview_get",
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119 ".plugin",
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120 in_sign="sss",
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121 out_sign="s",
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122 method=self._url_preview_get,
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123 async_=True,
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124 )
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125
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126 # API
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127
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128 def _url_preview_get(
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129 self, url: str, options: str, profile_key: str
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130 ) -> defer.Deferred:
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131 client = self.host.get_client(profile_key)
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132 d = defer.ensureDeferred(
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133 self.get_preview_data(client, url, data_format.deserialise(options))
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134 )
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135 d.addCallback(data_format.serialise)
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136 return d
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137
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138 @async_lru()
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139 async def get_preview_data(
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140 self, client: SatXMPPEntity, url: str, options: dict
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141 ) -> Optional[dict]:
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142 """Fetch preview data from a url using registered protocols
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143
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144 @param url: The url to fetch the preview data from
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145 @param options: Additional options that may be used while fetching preview data
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146 @return: A dictionary containing the preview data or None if no data could be
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147 fetched
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148 """
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149 parsed_url = parse.urlparse(url)
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150 domain = parsed_url.netloc
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151
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152 preview_data: Optional[dict] = None
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153 matched_protocol = None
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154 for registered_domain, registered_protocol in self.domain_protocols.items():
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155 if fnmatch.fnmatch(domain, registered_domain):
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156 matched_protocol = registered_protocol
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157 break
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158
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159 if matched_protocol is not None:
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160 callback = self.protocols[matched_protocol].callback
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161 preview_data = await callback(client, url, options)
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162 else:
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163 for name, protocol in sorted(
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164 self.protocols.items(), key=lambda item: item[1].priority, reverse=True
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165 ):
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166 try:
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167 preview_data = await protocol.callback(client, url, options)
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168 except Exception as e:
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169 log.warning(f"Can't run protocol {name} for {url}: {e}")
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170 else:
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171 if preview_data is not None:
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172 matched_protocol = protocol.name
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173 break
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174
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Goffi <goffi@goffi.org>
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175 if preview_data is not None:
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176 preview_data["protocol"] = matched_protocol
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177 # we don't clean html for youtube as we need Javascript to make it work, and
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178 # for invidious as we generate it ourself
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179 if "html" in preview_data:
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Goffi <goffi@goffi.org>
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180 if matched_protocol in ("oembed-youtube", "invidious"):
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181 # this flag indicate that we know the source of HTML and we should be
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182 # able to trust it. This will add `allow-scripts` and
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183 # `allow-same-origin` in the preview <iframe> "sandbox" attribute
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184 preview_data["html_known"] = True
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185 else:
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186 preview_data["html_known"] = False
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187 clean_xhtml = self.host.plugins["TEXT_SYNTAXES"].clean_xhtml
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Goffi <goffi@goffi.org>
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188 try:
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189 preview_data["html"] = clean_xhtml(preview_data["html"])
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Goffi <goffi@goffi.org>
parents:
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190 except Exception as e:
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parents:
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191 log.warning(f"Can't clean html data: {e}\n{preview_data}")
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parents:
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192 del preview_data["html"]
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parents:
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193
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194 return preview_data
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195
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196 @classmethod
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197 def register(cls, name: str, callback: Callable, priority: int = 0):
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198 """Register a protocol to retrieve preview data
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199
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diff changeset
200 The registered callback should return a dictionary of preview data if available,
eaa0daa7f834 plugin URL preview: URL preview first draft
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parents:
diff changeset
201 or None otherwise.
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parents:
diff changeset
202
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parents:
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203 @param name: Unique name of the protocol
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parents:
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204 @param callback: Async callback function to fetch preview data
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Goffi <goffi@goffi.org>
parents:
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205 @param priority: Priority of the protocol, with higher numbers indicating higher
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
206 priority
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Goffi <goffi@goffi.org>
parents:
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207 @return: None
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Goffi <goffi@goffi.org>
parents:
diff changeset
208 """
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
209 if name in cls.protocols:
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diff changeset
210 raise ConflictError(f"Protocol with the name {name} is already registered.")
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parents:
diff changeset
211
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parents:
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212 cls.protocols[name] = Protocol(name=name, callback=callback, priority=priority)
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parents:
diff changeset
213
eaa0daa7f834 plugin URL preview: URL preview first draft
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parents:
diff changeset
214 @classmethod
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Goffi <goffi@goffi.org>
parents:
diff changeset
215 def register_domain_protocol(cls, domains: Union[str, List[str]], protocol_name: str):
eaa0daa7f834 plugin URL preview: URL preview first draft
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parents:
diff changeset
216 """Register a protocol for a specific domain or list of domains
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
217
eaa0daa7f834 plugin URL preview: URL preview first draft
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parents:
diff changeset
218 @param domains: The domain name or list of domain names
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parents:
diff changeset
219 @param protocol_name: The name of the protocol to be associated with the domain(s)
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220 @return: None
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
221 """
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
222 protocol_name = protocol_name.replace(" ", "").lower()
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
223 if protocol_name not in cls.protocols:
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
224 raise ConflictError(
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
225 f"Protocol with the name {protocol_name} is not registered."
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
226 )
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
227
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
228 if isinstance(domains, str):
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
229 domains = [domains]
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
230
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
231 for domain in domains:
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
232 domain = domain.strip()
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
233 if not domain:
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
234 log.warning("empty string used as domain, ignoring")
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
235 continue
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
236 cls.domain_protocols[domain] = protocol_name
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
237
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
238 # Open Graph
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
239
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
240 async def fetch_open_graph_data(
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
241 self, client: SatXMPPEntity, url: str, options: dict
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
242 ) -> Optional[dict]:
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
243 """Fetch Open Graph data from a url
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
244
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
245 This method implements the Open Graph protocol, details of which can be found at:
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
246 http://ogp.me/
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
247
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
248 @param url: The url to fetch the Open Graph data from
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
249 @param options: Additional options that may be used while fetching data
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
250 @return: A dictionary containing the Open Graph data or None if no data could be
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
251 fetched
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
252 """
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
253 resp = await treq.get(url)
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
254
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
255 if resp.code == 200:
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
256 html = await resp.text()
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
257 parser = etree.HTMLParser()
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
258 tree = etree.fromstring(html, parser)
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
259
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
260 # Extract Open Graph data
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
261 metadata = {}
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
262 for tag in OG_TAGS:
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
263 og_el = tree.find('.//meta[@property="og:{tag}"]'.format(tag=tag))
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
264 if og_el is not None:
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
265 metadata[tag] = og_el.get("content")
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
266
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
267 if metadata:
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Goffi <goffi@goffi.org>
parents:
diff changeset
268 if "site_name" in metadata and not "provider_name" in metadata:
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
269 metadata["provider_name"] = metadata["site_name"]
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
270 return metadata
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parents:
diff changeset
271
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
272 return None
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
273 else:
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
274 raise PreviewFetchError(
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
275 f"Failed to fetch preview for {url}, status code: {resp.code}"
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
276 )
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
277
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
278 # oEmbed
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parents:
diff changeset
279
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parents:
diff changeset
280 async def _fetch_oembed_data(self, oembed_url: str) -> Optional[dict]:
eaa0daa7f834 plugin URL preview: URL preview first draft
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parents:
diff changeset
281 """Fetch oEmbed data from a given oEmbed URL
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Goffi <goffi@goffi.org>
parents:
diff changeset
282
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Goffi <goffi@goffi.org>
parents:
diff changeset
283 @param oembed_url: The url to fetch the oEmbed data from
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
284 @return: A dictionary containing the oEmbed data or None if no data could be
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
285 fetched
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
286 """
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
287 resp = await treq.get(oembed_url)
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
288 if resp.code == 200:
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
289 return json.loads(await resp.text())
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
290 else:
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
291 raise PreviewFetchError(
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
292 f"Failed to fetch oEmbed preview for {oembed_url}, status code: "
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
293 f"{resp.code}"
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
294 )
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
295
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
296 async def fetch_youtube_oembed_data(
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parents:
diff changeset
297 self, client: SatXMPPEntity, url: str, options: dict
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Goffi <goffi@goffi.org>
parents:
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298 ) -> Optional[dict]:
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parents:
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299 """Fetch YouTube oEmbed data from a url
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Goffi <goffi@goffi.org>
parents:
diff changeset
300
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parents:
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301 @param url: The url to fetch the YouTube oEmbed data from
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Goffi <goffi@goffi.org>
parents:
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302 @param options: Additional options that may be used while fetching data
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Goffi <goffi@goffi.org>
parents:
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303 @return: A dictionary containing the YouTube oEmbed data or None if no data could
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Goffi <goffi@goffi.org>
parents:
diff changeset
304 be fetched
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Goffi <goffi@goffi.org>
parents:
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305 """
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Goffi <goffi@goffi.org>
parents:
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306 oembed_url = f"https://www.youtube.com/oembed?url={parse.quote(url)}&format=json"
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parents:
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307 data = await self._fetch_oembed_data(oembed_url)
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parents: 4103
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308 if data is not None and "html" in data:
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parents: 4103
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309 html = data["html"]
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parents:
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310 root = etree.HTML(html)
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parents: 4103
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311 iframe_elt = root.xpath("//iframe")
4103
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parents:
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312 if iframe_elt:
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Goffi <goffi@goffi.org>
parents: 4103
diff changeset
313 iframe_elt[0].attrib[
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Goffi <goffi@goffi.org>
parents: 4103
diff changeset
314 "style"
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Goffi <goffi@goffi.org>
parents: 4103
diff changeset
315 ] = "position: absolute; top: 0; left: 0; width: 100%; height: 100%;"
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Goffi <goffi@goffi.org>
parents: 4103
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316 data["html"] = etree.tostring(root, method="html", encoding="unicode")
4103
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parents:
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317 else:
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Goffi <goffi@goffi.org>
parents:
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318 log.warning("No <iframe> found in the YouTube oEmbed response")
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Goffi <goffi@goffi.org>
parents:
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319
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Goffi <goffi@goffi.org>
parents:
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320 return data
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Goffi <goffi@goffi.org>
parents:
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321
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Goffi <goffi@goffi.org>
parents:
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322 async def fetch_generic_oembed_data(
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Goffi <goffi@goffi.org>
parents:
diff changeset
323 self, client: SatXMPPEntity, url: str, options: dict
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Goffi <goffi@goffi.org>
parents:
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324 ) -> Optional[dict]:
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Goffi <goffi@goffi.org>
parents:
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325 """Fetch generic oEmbed data from a url
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Goffi <goffi@goffi.org>
parents:
diff changeset
326
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Goffi <goffi@goffi.org>
parents:
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327 @param url: The url to fetch the oEmbed data from
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Goffi <goffi@goffi.org>
parents:
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328 @param options: Additional options that may be used while fetching data
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Goffi <goffi@goffi.org>
parents:
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329 @return: A dictionary containing the oEmbed data or None if no data could be
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Goffi <goffi@goffi.org>
parents:
diff changeset
330 fetched
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Goffi <goffi@goffi.org>
parents:
diff changeset
331 """
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Goffi <goffi@goffi.org>
parents:
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332 resp = await treq.get(url)
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Goffi <goffi@goffi.org>
parents:
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333 if resp.code == 200:
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Goffi <goffi@goffi.org>
parents:
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334 html = await resp.text()
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Goffi <goffi@goffi.org>
parents:
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335 parser = etree.HTMLParser()
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Goffi <goffi@goffi.org>
parents:
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336 tree = etree.fromstring(html, parser)
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Goffi <goffi@goffi.org>
parents:
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337
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Goffi <goffi@goffi.org>
parents:
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338 # Find oEmbed URL
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Goffi <goffi@goffi.org>
parents:
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339 oembed_link = tree.find('.//link[@type="application/json+oembed"]')
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Goffi <goffi@goffi.org>
parents:
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340 if oembed_link is not None:
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Goffi <goffi@goffi.org>
parents:
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341 oembed_url = oembed_link.get("href")
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Goffi <goffi@goffi.org>
parents:
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342 return await self._fetch_oembed_data(oembed_url)
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Goffi <goffi@goffi.org>
parents:
diff changeset
343 else:
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Goffi <goffi@goffi.org>
parents:
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344 return None
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Goffi <goffi@goffi.org>
parents:
diff changeset
345 else:
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Goffi <goffi@goffi.org>
parents:
diff changeset
346 raise PreviewFetchError(
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Goffi <goffi@goffi.org>
parents:
diff changeset
347 f"Failed to fetch preview for {url}, status code: {resp.code}"
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Goffi <goffi@goffi.org>
parents:
diff changeset
348 )
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Goffi <goffi@goffi.org>
parents:
diff changeset
349
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Goffi <goffi@goffi.org>
parents:
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350 async def fetch_generic_data(
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Goffi <goffi@goffi.org>
parents:
diff changeset
351 self, client: SatXMPPEntity, url: str, options: dict
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Goffi <goffi@goffi.org>
parents:
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352 ) -> Optional[dict]:
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Goffi <goffi@goffi.org>
parents:
diff changeset
353 """Fetch generic data from a url
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
354
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Goffi <goffi@goffi.org>
parents:
diff changeset
355 This method attempts to extract the title, description, and author metadata from
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
356 the HTML of the page. If these data cannot be found, the method will return None.
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Goffi <goffi@goffi.org>
parents:
diff changeset
357
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Goffi <goffi@goffi.org>
parents:
diff changeset
358 @param url: The url to fetch the generic data from
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Goffi <goffi@goffi.org>
parents:
diff changeset
359 @param options: Additional options that may be used while fetching data
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Goffi <goffi@goffi.org>
parents:
diff changeset
360 @return: A dictionary containing the generic data or None if no data could be
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
361 fetched
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
362 """
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
363 resp = await treq.get(url)
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Goffi <goffi@goffi.org>
parents:
diff changeset
364 if resp.code == 200:
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
365 html = await resp.text()
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Goffi <goffi@goffi.org>
parents:
diff changeset
366 parser = etree.HTMLParser()
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Goffi <goffi@goffi.org>
parents:
diff changeset
367 tree = etree.fromstring(html, parser)
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Goffi <goffi@goffi.org>
parents:
diff changeset
368
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Goffi <goffi@goffi.org>
parents:
diff changeset
369 # Find title, description, and author metadata
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Goffi <goffi@goffi.org>
parents:
diff changeset
370 title_el = tree.find(".//title")
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Goffi <goffi@goffi.org>
parents:
diff changeset
371 desc_el = tree.find('.//meta[@name="description"]')
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Goffi <goffi@goffi.org>
parents:
diff changeset
372 author_el = tree.find('.//meta[@name="author"]')
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Goffi <goffi@goffi.org>
parents:
diff changeset
373
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Goffi <goffi@goffi.org>
parents:
diff changeset
374 metadata = {
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
375 "title": title_el.text if title_el is not None else "",
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Goffi <goffi@goffi.org>
parents:
diff changeset
376 "description": desc_el.get("content") if desc_el is not None else "",
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Goffi <goffi@goffi.org>
parents:
diff changeset
377 "author_name": author_el.get("content") if author_el is not None else "",
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Goffi <goffi@goffi.org>
parents:
diff changeset
378 "url": url,
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
379 "provider_name": parse.urlparse(url).netloc,
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
380 "provider_url": f"{parse.urlparse(url).scheme}://{parse.urlparse(url).netloc}",
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
381 }
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
382
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
383 return metadata if any(metadata.values()) else None
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
384 else:
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
385 raise PreviewFetchError(
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
386 f"Failed to fetch generic preview for {url}, status code: {resp.code}"
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
387 )
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
388
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
389 # Wikipedia
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
390
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
391 async def fetch_wikipedia_data(
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
392 self, client: SatXMPPEntity, url: str, options: dict
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
393 ) -> Optional[dict]:
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
394 """Fetch Wikipedia data from a url
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
395
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
396 This method implements the Wikipedia API, details of which can be found at:
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
397 https://www.mediawiki.org/wiki/API:Main_page
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
398
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
399 @param url: The url to fetch the Wikipedia data from
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
400 @param options: Additional options that may be used while fetching data
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
401 @return: A dictionary containing the Wikipedia data or None if no data could be
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
402 fetched
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
403 """
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
404 parsed_url = parse.urlparse(url)
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
405 page_name = parsed_url.path.split("/")[-1]
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
406
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
407 # Use the Wikipedia API to get a summary of the page and a preview image
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
408 api_url = (
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
409 f"https://{parsed_url.netloc}/w/api.php?format=json&action=query&"
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
410 f"prop=extracts|pageimages&exintro&explaintext&redirects=1&piprop=thumbnail"
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
411 f"&pithumbsize=300&titles={page_name}"
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
412 )
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
413
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
414 resp = await treq.get(api_url)
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
415 if resp.code == 200:
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
416 data = json.loads(await resp.text())
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
417 # The page ID is the first key in the "pages" dictionary
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
418 page_id = next(iter(data["query"]["pages"].keys()))
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
419 page = data["query"]["pages"][page_id]
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
420
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
421 # The API may return a page with a missing title or extract if the page does
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
422 # not exist
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
423 if "missing" in page:
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
424 return None
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
425
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
426 return {
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
427 "provider_name": "Wikipedia",
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
428 "provider_url": "https://www.wikipedia.org",
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
429 "title": page.get("title"),
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
430 "description": page.get("extract"),
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
431 "url": url,
4270
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Goffi <goffi@goffi.org>
parents: 4103
diff changeset
432 "image": (
0d7bb4df2343 Reformatted code base using black.
Goffi <goffi@goffi.org>
parents: 4103
diff changeset
433 page.get("thumbnail", {}).get("source")
0d7bb4df2343 Reformatted code base using black.
Goffi <goffi@goffi.org>
parents: 4103
diff changeset
434 if "thumbnail" in page
0d7bb4df2343 Reformatted code base using black.
Goffi <goffi@goffi.org>
parents: 4103
diff changeset
435 else None
0d7bb4df2343 Reformatted code base using black.
Goffi <goffi@goffi.org>
parents: 4103
diff changeset
436 ),
4103
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
437 }
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
438 else:
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
439 raise PreviewFetchError(
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
440 f"Failed to fetch Wikipedia preview for {url}, status code: {resp.code}"
eaa0daa7f834 plugin URL preview: URL preview first draft
Goffi <goffi@goffi.org>
parents:
diff changeset
441 )
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442
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443 # Invidious
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444
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445 async def fetch_invidious_data(
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446 self, client: SatXMPPEntity, url: str, options: dict
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447 ) -> Optional[dict]:
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448 """
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449 Fetch Invidious data from a url and generate HTML iframe.
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450
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451 @param url: The url to fetch the Invidious data from.
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452 @param options: Additional options that may be used while fetching data.
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453 @return: A dictionary containing the Invidious data or None if no data could be fetched.
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454 """
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455 parsed_url = parse.urlparse(url)
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456 if "watch" in parsed_url.path:
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457 video_id = parse.parse_qs(parsed_url.query).get("v", [None])[0]
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458 else:
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459 video_id = parsed_url.path.strip("/")
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460 if not video_id:
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461 log.warning(f"Can't extract video ID from {url}")
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462 return None
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463
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464 invidious_api_url = f"https://{parsed_url.netloc}/api/v1/videos/{video_id}"
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465
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466 resp = await treq.get(invidious_api_url)
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467 if resp.code == 200:
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468 video_data = await resp.json()
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469 # construct the iframe html code
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470 html = (
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471 f"<iframe"
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472 f' width="100%"'
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473 f' height="auto"'
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474 f' src="https://{parsed_url.netloc}/embed/{video_id}"'
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475 f' frameborder="0" '
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476 f' allow="'
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477 f" accelerometer;"
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478 f" autoplay;"
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479 f" clipboard-write;"
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480 f" encrypted-media;"
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481 f" gyroscope;"
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482 f' picture-in-picture"'
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483 f' style="'
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484 f" position: absolute;"
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485 f" top: 0;"
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486 f" left: 0;"
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487 f" width: 100%;"
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488 f' height: 100%;"'
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489 f" allowfullscreen></iframe>"
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490 )
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491 # structure the data to be returned
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492 data = {
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493 "title": video_data.get("title"),
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494 "description": video_data.get("description"),
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495 "url": url,
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496 "image": video_data.get("videoThumbnails", [{}])[0].get("url"),
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497 "provider_name": "Invidious",
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498 "provider_url": f"https://{parsed_url.netloc}",
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499 "html": html,
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500 "author_name": video_data.get("author"),
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501 "author_url": f"https://{parsed_url.netloc}/channel/{video_data.get('authorId')}",
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502 }
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503 return data
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504 else:
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505 log.warning(f"Unable to fetch video data from Invidious API for {video_id}")
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506 return None