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annotate sat/plugins/plugin_misc_download.py @ 3195:29d72336a40d

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changelog: update
author Goffi <goffi@goffi.org>
date Fri, 28 Feb 2020 18:10:58 +0100
parents d92a144f3589
children 2c0628f3927e
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1 #!/usr/bin/env python3
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2
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3 # SAT plugin for downloading files
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4 # Copyright (C) 2009-2020 Jérôme Poisson (goffi@goffi.org)
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5
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6 # This program is free software: you can redistribute it and/or modify
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7 # it under the terms of the GNU Affero General Public License as published by
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8 # the Free Software Foundation, either version 3 of the License, or
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9 # (at your option) any later version.
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10
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11 # This program is distributed in the hope that it will be useful,
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12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 # GNU Affero General Public License for more details.
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15
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16 # You should have received a copy of the GNU Affero General Public License
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17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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18
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19 from pathlib import Path
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20 from urllib.parse import urlparse, unquote
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21 import hashlib
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22 import treq
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23 from twisted.internet import defer
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24 from twisted.words.protocols.jabber import error as jabber_error
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25 from sat.core.i18n import _, D_
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26 from sat.core.constants import Const as C
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27 from sat.core.log import getLogger
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28 from sat.core import exceptions
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29 from sat.tools import xml_tools
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30 from sat.tools.common import data_format
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31 from sat.tools import stream
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32
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33 log = getLogger(__name__)
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34
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35
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36 PLUGIN_INFO = {
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37 C.PI_NAME: "File Download",
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38 C.PI_IMPORT_NAME: "DOWNLOAD",
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39 C.PI_TYPE: C.PLUG_TYPE_MISC,
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40 C.PI_MAIN: "DownloadPlugin",
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41 C.PI_HANDLER: "no",
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42 C.PI_DESCRIPTION: _("""File download management"""),
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43 }
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44
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45
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46 class DownloadPlugin(object):
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47
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48 def __init__(self, host):
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49 log.info(_("plugin Download initialization"))
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50 self.host = host
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51 host.bridge.addMethod(
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52 "fileDownload",
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53 ".plugin",
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54 in_sign="ssss",
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55 out_sign="a{ss}",
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56 method=self._fileDownload,
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57 async_=True,
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58 )
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59 host.bridge.addMethod(
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60 "fileDownloadComplete",
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61 ".plugin",
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62 in_sign="ssss",
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63 out_sign="s",
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64 method=self._fileDownloadComplete,
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65 async_=True,
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66 )
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67 self._download_callbacks = {}
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68 self.registerScheme('http', self.downloadHTTP)
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69 self.registerScheme('https', self.downloadHTTP)
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70
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71 def _fileDownload(self, uri, dest_path, options_s, profile):
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72 client = self.host.getClient(profile)
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73 options = data_format.deserialise(options_s)
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74
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75 return defer.ensureDeferred(self.fileDownload(
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76 client, uri, Path(dest_path), options
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77 ))
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78
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79 async def fileDownload(self, client, uri, dest_path, options=None):
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80 """Download a file using best available method
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81
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82 parameters are the same as for [download]
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83 @return (dict): action dictionary, with progress id in case of success, else xmlui
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84 message
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85 """
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86 try:
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87 progress_id, __ = await self.download(client, uri, dest_path, options)
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88 except Exception as e:
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89 if (isinstance(e, jabber_error.StanzaError)
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90 and e.condition == 'not-acceptable'):
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91 reason = e.text
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92 else:
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93 reason = str(e)
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94 msg = D_("Can't download file: {reason}").format(reason=reason)
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95 log.warning(msg)
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96 return {
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97 "xmlui": xml_tools.note(
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98 msg, D_("Can't download file"), C.XMLUI_DATA_LVL_WARNING
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99 ).toXml()
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100 }
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101 else:
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102 return {"progress": progress_id}
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103
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104 def _fileDownloadComplete(self, uri, dest_path, options_s, profile):
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105 client = self.host.getClient(profile)
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106 options = data_format.deserialise(options_s)
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107
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108 d = defer.ensureDeferred(self.fileDownloadComplete(
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109 client, uri, dest_path, options
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110 ))
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111 d.addCallback(lambda path: str(path))
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112 return d
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113
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114 async def fileDownloadComplete(self, client, uri, dest_path, options=None):
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115 """Helper method to fully download a file and return its path
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116
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117 parameters are the same as for [download]
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118 @return (str): path to the downloaded file
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119 use empty string to store the file in cache
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120 """
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121 __, download_d = await self.download(client, uri, dest_path, options)
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122 dest_path = await download_d
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123 return dest_path
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124
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125 async def download(self, client, uri, dest_path, options=None):
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126 """Send a file using best available method
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127
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128 @param uri(str): URI to the file to download
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129 @param dest_path(str, Path): where the file must be downloaded
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130 if empty string, the file will be stored in local path
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131 @param options(dict, None): options depending on scheme handler
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132 Some common options:
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133 - ignore_tls_errors(bool): True to ignore SSL/TLS certificate verification
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134 used only if HTTPS transport is needed
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135 @return (tuple[unicode,D(unicode)]): progress_id and a Deferred which fire
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136 download URL when download is finished
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137 progress_id can be empty string if the file already exist and is not
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138 downloaded again (can happen if cache is used with empty dest_path)
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139 """
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140 if options is None:
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141 options = {}
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diff changeset
142
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Goffi <goffi@goffi.org>
parents:
diff changeset
143 uri_parsed = urlparse(uri, 'http')
3187
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Goffi <goffi@goffi.org>
parents: 3186
diff changeset
144 if dest_path:
d92a144f3589 plugin download: use cache if dest_path is empty:
Goffi <goffi@goffi.org>
parents: 3186
diff changeset
145 dest_path = Path(dest_path)
d92a144f3589 plugin download: use cache if dest_path is empty:
Goffi <goffi@goffi.org>
parents: 3186
diff changeset
146 else:
d92a144f3589 plugin download: use cache if dest_path is empty:
Goffi <goffi@goffi.org>
parents: 3186
diff changeset
147 filename = Path(unquote(uri_parsed.path)).name.strip() or C.FILE_DEFAULT_NAME
d92a144f3589 plugin download: use cache if dest_path is empty:
Goffi <goffi@goffi.org>
parents: 3186
diff changeset
148 # we don't use Path.suffixes because we don't want to have more than 2
d92a144f3589 plugin download: use cache if dest_path is empty:
Goffi <goffi@goffi.org>
parents: 3186
diff changeset
149 # suffixes, but we still want to handle suffixes like "tar.gz".
d92a144f3589 plugin download: use cache if dest_path is empty:
Goffi <goffi@goffi.org>
parents: 3186
diff changeset
150 stem, *suffixes = filename.rsplit('.', 2)
d92a144f3589 plugin download: use cache if dest_path is empty:
Goffi <goffi@goffi.org>
parents: 3186
diff changeset
151 # we hash the URL to have an unique identifier, and avoid double download
d92a144f3589 plugin download: use cache if dest_path is empty:
Goffi <goffi@goffi.org>
parents: 3186
diff changeset
152 url_hash = hashlib.sha256(uri_parsed.geturl().encode()).hexdigest()
d92a144f3589 plugin download: use cache if dest_path is empty:
Goffi <goffi@goffi.org>
parents: 3186
diff changeset
153 uid = f"{stem}_{url_hash}"
d92a144f3589 plugin download: use cache if dest_path is empty:
Goffi <goffi@goffi.org>
parents: 3186
diff changeset
154 cache_data = client.cache.getMetadata(uid)
d92a144f3589 plugin download: use cache if dest_path is empty:
Goffi <goffi@goffi.org>
parents: 3186
diff changeset
155 if cache_data is not None:
d92a144f3589 plugin download: use cache if dest_path is empty:
Goffi <goffi@goffi.org>
parents: 3186
diff changeset
156 # file is already in cache, we return it
d92a144f3589 plugin download: use cache if dest_path is empty:
Goffi <goffi@goffi.org>
parents: 3186
diff changeset
157 download_d = defer.succeed(cache_data['path'])
d92a144f3589 plugin download: use cache if dest_path is empty:
Goffi <goffi@goffi.org>
parents: 3186
diff changeset
158 return '', download_d
d92a144f3589 plugin download: use cache if dest_path is empty:
Goffi <goffi@goffi.org>
parents: 3186
diff changeset
159 else:
d92a144f3589 plugin download: use cache if dest_path is empty:
Goffi <goffi@goffi.org>
parents: 3186
diff changeset
160 # the file is not in cache
d92a144f3589 plugin download: use cache if dest_path is empty:
Goffi <goffi@goffi.org>
parents: 3186
diff changeset
161 unique_name = '.'.join([uid] + suffixes)
d92a144f3589 plugin download: use cache if dest_path is empty:
Goffi <goffi@goffi.org>
parents: 3186
diff changeset
162 with client.cache.cacheData("DOWNLOAD", uid, filename=unique_name) as f:
d92a144f3589 plugin download: use cache if dest_path is empty:
Goffi <goffi@goffi.org>
parents: 3186
diff changeset
163 # we close the file and only use its name, the file will be opened
d92a144f3589 plugin download: use cache if dest_path is empty:
Goffi <goffi@goffi.org>
parents: 3186
diff changeset
164 # by the registered callback
d92a144f3589 plugin download: use cache if dest_path is empty:
Goffi <goffi@goffi.org>
parents: 3186
diff changeset
165 dest_path = f.name
3088
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
166 try:
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
167 callback = self._download_callbacks[uri_parsed.scheme]
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
168 except KeyError:
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
169 raise exceptions.NotFound(f"Can't find any handler for uri {uri}")
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
170 else:
3187
d92a144f3589 plugin download: use cache if dest_path is empty:
Goffi <goffi@goffi.org>
parents: 3186
diff changeset
171 progress_id, download_d = await callback(
d92a144f3589 plugin download: use cache if dest_path is empty:
Goffi <goffi@goffi.org>
parents: 3186
diff changeset
172 client, uri_parsed, dest_path, options)
d92a144f3589 plugin download: use cache if dest_path is empty:
Goffi <goffi@goffi.org>
parents: 3186
diff changeset
173 download_d.addCallback(lambda __: dest_path)
d92a144f3589 plugin download: use cache if dest_path is empty:
Goffi <goffi@goffi.org>
parents: 3186
diff changeset
174 return progress_id, download_d
3088
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
175
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
176 def registerScheme(self, scheme, download_cb):
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
177 """Register an URI scheme handler
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
178
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
179 @param scheme(unicode): URI scheme this callback is handling
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
180 @param download_cb(callable): callback to download a file
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
181 arguments are:
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
182 - (SatXMPPClient) client
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
183 - (urllib.parse.SplitResult) parsed URI
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
184 - (Path) destination path where the file must be downloaded
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
185 - (dict) options
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
186 must return a tuple with progress_id and a Deferred which fire when download
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
187 is finished
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
188 """
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
189 if scheme in self._download_callbacks:
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
190 raise exceptions.ConflictError(
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
191 f"A method with scheme {scheme!r} is already registered"
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
192 )
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
193 self._download_callbacks[scheme] = download_cb
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
194
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
195 def unregister(self, scheme):
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
196 try:
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
197 del self._download_callbacks[scheme]
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
198 except KeyError:
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
199 raise exceptions.NotFound(f"No callback registered for scheme {scheme!r}")
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
200
3186
84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors
Goffi <goffi@goffi.org>
parents: 3136
diff changeset
201 def errbackDownload(self, file_obj, download_d, resp):
84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors
Goffi <goffi@goffi.org>
parents: 3136
diff changeset
202 """Set file_obj and download deferred appropriatly after a network error
84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors
Goffi <goffi@goffi.org>
parents: 3136
diff changeset
203
84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors
Goffi <goffi@goffi.org>
parents: 3136
diff changeset
204 @param file_obj(SatFile): file where the download must be done
84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors
Goffi <goffi@goffi.org>
parents: 3136
diff changeset
205 @param download_d(Deferred): deffered which must be fired on complete download
84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors
Goffi <goffi@goffi.org>
parents: 3136
diff changeset
206 @param resp(treq.response.IResponse): treq response
84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors
Goffi <goffi@goffi.org>
parents: 3136
diff changeset
207 """
84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors
Goffi <goffi@goffi.org>
parents: 3136
diff changeset
208 msg = f"HTTP error ({resp.code}): {resp.phrase.decode()}"
84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors
Goffi <goffi@goffi.org>
parents: 3136
diff changeset
209 file_obj.close(error=msg)
84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors
Goffi <goffi@goffi.org>
parents: 3136
diff changeset
210 download_d.errback(exceptions.NetworkError(msg))
84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors
Goffi <goffi@goffi.org>
parents: 3136
diff changeset
211
3088
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
212 async def downloadHTTP(self, client, uri_parsed, dest_path, options):
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
213 url = uri_parsed.geturl()
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
214
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
215 head_data = await treq.head(url)
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
216 try:
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
217 content_length = int(head_data.headers.getRawHeaders('content-length')[0])
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
218 except (KeyError, TypeError, IndexError):
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
219 content_length = None
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
220 log.debug(f"No content lenght found at {url}")
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
221 file_obj = stream.SatFile(
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
222 self.host,
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
223 client,
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
224 dest_path,
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
225 mode="wb",
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
226 size = content_length,
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
227 )
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
228
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
229 progress_id = file_obj.uid
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
230
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
231 resp = await treq.get(url, unbuffered=True)
3186
84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors
Goffi <goffi@goffi.org>
parents: 3136
diff changeset
232 if resp.code == 200:
84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors
Goffi <goffi@goffi.org>
parents: 3136
diff changeset
233 d = treq.collect(resp, file_obj.write)
84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors
Goffi <goffi@goffi.org>
parents: 3136
diff changeset
234 d.addBoth(lambda _: file_obj.close())
84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors
Goffi <goffi@goffi.org>
parents: 3136
diff changeset
235 else:
84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors
Goffi <goffi@goffi.org>
parents: 3136
diff changeset
236 d = defer.Deferred()
84b0c8b4dee0 plugin download, aesgcm: fixed handling of HTTP errors
Goffi <goffi@goffi.org>
parents: 3136
diff changeset
237 self.errbackDownload(file_obj, d, resp)
3088
d1464548055a plugin file download: meta plugin to handle file download:
Goffi <goffi@goffi.org>
parents:
diff changeset
238 return progress_id, d