Mercurial > libervia-backend

annotate sat/plugins/plugin_misc_download.py @ 3120:0c29155ac68b

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core: backend autoconnection: A new Connection/autoconnect_backend param can be set for a profile or component to be started automatically with backend. This is specially useful for components, but can be useful for client profile too (e.g. on Android we need to start profile with backend to get notifications, this part will come with following commits). The new Sqlite.getIndParamValues method allows to retrieve the same parameters for all profiles.
author Goffi <goffi@goffi.org>
date Sat, 25 Jan 2020 21:08:32 +0100
parents d1464548055a
children 9d0df638c8b4
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rev   line source
3088
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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) 2009-2019 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
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21 import treq
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22 from twisted.internet import defer
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23 from twisted.words.protocols.jabber import error as jabber_error
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24 from sat.core.i18n import _, D_
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25 from sat.core.constants import Const as C
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26 from sat.core.log import getLogger
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27 from sat.core import exceptions
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28 from sat.tools import xml_tools
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29 from sat.tools.common import data_format
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30 from sat.tools import stream
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31
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32 log = getLogger(__name__)
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33
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34
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35 PLUGIN_INFO = {
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36 C.PI_NAME: "File Download",
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37 C.PI_IMPORT_NAME: "DOWNLOAD",
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38 C.PI_TYPE: C.PLUG_TYPE_MISC,
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39 C.PI_MAIN: "DownloadPlugin",
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40 C.PI_HANDLER: "no",
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41 C.PI_DESCRIPTION: _("""File download management"""),
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42 }
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43
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44
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45 class DownloadPlugin(object):
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46
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47 def __init__(self, host):
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48 log.info(_("plugin Download initialization"))
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49 self.host = host
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50 host.bridge.addMethod(
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51 "fileDownload",
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52 ".plugin",
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53 in_sign="ssss",
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54 out_sign="a{ss}",
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55 method=self._fileDownload,
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56 async_=True,
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57 )
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58 host.bridge.addMethod(
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59 "fileDownloadComplete",
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60 ".plugin",
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61 in_sign="ssss",
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62 out_sign="s",
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63 method=self._fileDownloadComplete,
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64 async_=True,
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65 )
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66 self._download_callbacks = {}
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67 self.registerScheme('http', self.downloadHTTP)
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68 self.registerScheme('https', self.downloadHTTP)
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69
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70 def _fileDownload(self, uri, dest_path, options_s, profile):
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71 client = self.host.getClient(profile)
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72 options = data_format.deserialise(options_s)
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73
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74 return defer.ensureDeferred(self.fileDownload(
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75 client, uri, Path(dest_path), options
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76 ))
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77
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78 async def fileDownload(self, client, uri, dest_path, options=None):
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79 """Send a file using best available method
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80
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81 parameters are the same as for [download]
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82 @return (dict): action dictionary, with progress id in case of success, else xmlui
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83 message
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84 """
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85 try:
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86 progress_id, __ = await self.download(client, uri, dest_path, options)
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87 except Exception as e:
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88 if (isinstance(e, jabber_error.StanzaError)
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89 and e.condition == 'not-acceptable'):
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90 reason = e.text
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91 else:
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92 reason = str(e)
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93 msg = D_("Can't download file: {reason}").format(reason=reason)
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94 log.warning(msg)
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95 return {
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96 "xmlui": xml_tools.note(
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97 msg, D_("Can't download file"), C.XMLUI_DATA_LVL_WARNING
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98 ).toXml()
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99 }
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100 else:
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101 return {"progress": progress_id}
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102
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103 def _fileDownloadComplete(self, uri, dest_path, options_s, profile):
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104 client = self.host.getClient(profile)
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105 options = data_format.deserialise(options_s)
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106
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107 d = defer.ensureDeferred(self.fileDownloadComplete(
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108 client, uri, Path(dest_path), options
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109 ))
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110 d.addCallback(lambda path: str(path))
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111 return d
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112
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113 async def fileDownloadComplete(self, client, uri, dest_path, options=None):
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114 """Helper method to fully download a file and return its path
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115
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116 parameters are the same as for [download]
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117 @return (str): path to the downloaded file
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118 """
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119 __, download_d = await self.download(client, uri, dest_path, options)
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120 await download_d
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121 return dest_path
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122
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123 async def download(self, client, uri, dest_path, options=None):
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124 """Send a file using best available method
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125
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126 @param uri(str): URI to the file to download
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127 @param dest_path(str, Path): where the file must be downloaded
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128 @param options(dict, None): options depending on scheme handler
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129 Some common options:
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130 - ignore_tls_errors(bool): True to ignore SSL/TLS certificate verification
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131 used only if HTTPS transport is needed
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132 @return (tuple[unicode,D(unicode)]): progress_id and a Deferred which fire
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133 download URL when download is finished
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134 """
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135 if options is None:
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136 options = {}
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137
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138 dest_path = Path(dest_path)
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139 uri_parsed = urlparse(uri, 'http')
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140 try:
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141 callback = self._download_callbacks[uri_parsed.scheme]
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142 except KeyError:
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143 raise exceptions.NotFound(f"Can't find any handler for uri {uri}")
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144 else:
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145 return await callback(client, uri_parsed, dest_path, options)
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146
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147 def registerScheme(self, scheme, download_cb):
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148 """Register an URI scheme handler
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149
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150 @param scheme(unicode): URI scheme this callback is handling
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151 @param download_cb(callable): callback to download a file
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152 arguments are:
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153 - (SatXMPPClient) client
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154 - (urllib.parse.SplitResult) parsed URI
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155 - (Path) destination path where the file must be downloaded
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156 - (dict) options
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157 must return a tuple with progress_id and a Deferred which fire when download
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158 is finished
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159 """
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160 if scheme in self._download_callbacks:
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161 raise exceptions.ConflictError(
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162 f"A method with scheme {scheme!r} is already registered"
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163 )
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164 self._download_callbacks[scheme] = download_cb
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165
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166 def unregister(self, scheme):
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167 try:
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168 del self._download_callbacks[scheme]
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169 except KeyError:
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170 raise exceptions.NotFound(f"No callback registered for scheme {scheme!r}")
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171
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172 async def downloadHTTP(self, client, uri_parsed, dest_path, options):
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173 url = uri_parsed.geturl()
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174
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175 head_data = await treq.head(url)
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176 try:
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177 content_length = int(head_data.headers.getRawHeaders('content-length')[0])
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178 except (KeyError, TypeError, IndexError):
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179 content_length = None
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180 log.debug(f"No content lenght found at {url}")
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181 file_obj = stream.SatFile(
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182 self.host,
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183 client,
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184 dest_path,
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185 mode="wb",
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186 size = content_length,
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187 )
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188
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parents:
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189 progress_id = file_obj.uid
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parents:
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190
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parents:
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191 resp = await treq.get(url, unbuffered=True)
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192 d = treq.collect(resp, file_obj.write)
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193 d.addBoth(lambda _: file_obj.close())
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194 return progress_id, d