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annotate doc/libervia-cli/pubsub.rst @ 4303:a7ec325246fb

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component email-gateway: first draft: Initial implementation of the Email Gateway. This component uses XEP-0100 for registration. Upon registration and subsequent startups, a connection is made to registered IMAP services, and incoming emails (in `INBOX` mailboxes) are immediately forwarded as XMPP messages. In the opposite direction, an SMTP connection is established to send emails on incoming XMPP messages. rel 449
author Goffi <goffi@goffi.org>
date Fri, 06 Sep 2024 18:07:17 +0200
parents c4418949aa37
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 .. _libervia-cli_pubsub:
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2
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3 =========================
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4 pubsub: PubSub management
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5 =========================
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6
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7 PubSub commands are low level command to handle a PubSub Service.
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8 They are using the generic pubsub arguments
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9
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10 For most of those commands, :ref:`pubsub_common` commands are used to specify the
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11 destination item.
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12
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13 set
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14 ===
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15
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16 Publish a pubsub item.
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17
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18 ``stdin`` is used to get the raw XML of the payload of the item to publish.
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19
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20 ``-f KEY VALUE, --field KEY VALUE`` can be used to specify publish options, i.e. option
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21 which must be set if the node already exists, or used if the node is to be created, see
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22 `XEP-0060 §7.1.5`_ for details.
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24 In the same way as for :ref:`libervia-cli_pubsub_node_create`, ``-F, --full-prefix`` can be used if
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25 you need to specify the full option name.
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27 |e2e_arg|
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29 |pte_arg|
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30
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31 |sign_arg|
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32
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33 .. _XEP-0060 §7.1.5: https://xmpp.org/extensions/xep-0060.html#publisher-publish-options
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34
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35 example
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36 -------
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37
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38 Create an item with a custom note XML::
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39
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40 $ echo '<note xmlns="http://example.net/mynotes">this is a note</note>' | li pubsub set -n "notes"
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41
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42 .. _li_pubsub_get:
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43
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44 get
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45 ===
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46
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47 Retrieve items from specified node. Default output is prettified and highlighted XML.
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48
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49 If the node is end-to-end encrypted, items will be automatically and transparently
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50 decrypted if the shared secrets are known. If you want to avoid this behaviour and get the
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51 items undecrypted, you can use the ``--no-decrypt`` flag.
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52
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53 example
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54 -------
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55
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56 Retrieve the last 5 notes from our custom notes node::
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57
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58 $ li pubsub get -n notes -M 5
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60 .. _li_pubsub_delete:
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62 delete
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63 ======
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64
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65 Delete an item from a node. If ``--no-notification`` is specified, subscribers wont be notified
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66 of the item retraction (this is NOT recommended, as it will cause trouble to keep items in
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67 sync, take caution when using this flag).
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68
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69 By default a confirmation is requested before deletion is requested to the PubSub service,
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70 but you can override this behaviour by using ``-f, --force`` option.
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71
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72 example
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73 -------
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74
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75 Delete item with id ``123456`` from a node::
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76
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77 $ li pubsub delete -n test_node -i 123456
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78
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79 edit
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80 ====
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81
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82 Edit the raw XML of an item payload using your local editor (the one set in ``$EDITOR``).
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83
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84 If you don't change anything or publish an empty blog post, the edition will be cancelled.
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85
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86 :ref:`draft_common` commands can be used.
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87
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88 |e2e_arg|
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90 |pte_arg|
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91
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92 |sign_arg|
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93
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94 example
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95 -------
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96
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97 Edit the last note in our custom node::
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98
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99 $ li pubsub edit -n notes -L
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101 .. _li-pubsub_rename:
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102
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103 rename
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104 ======
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105
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106 Move a item to a new ID. As there is currently no "rename" or "move" operation in XMPP
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107 PubSub, this is done by republishing the item with the new ID, then deleting the old item
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108 if the publication succeed.
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109
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110 This is notably useful when user friendly URL based on ID are used, and one need to fix a
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111 typo or something else.
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112
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113 example
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114 -------
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115
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116 Rename a PubSub item with ID ``123`` to ``456``::
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117
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118 $ li pubsub rename -n some_node -i 123 456
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119
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120 subscribe
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121 =========
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122
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123 Subscribe to a node.
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124
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125 Subscription is used to get notifications from the node in case of new/updated item or
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126 deletion.
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127
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128 If ``--public`` is used, the subscription will be made visible to anybody. For this to
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129 work, the target pubsub/PEP service must implement `XEP-0465 Public Pubsub
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130 Subscriptions`_. If your own server also implements XEP-0495 (and thus `XEP-0376 Pubsub
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131 Account Management`_ wich is a dependency), your subscription will also be visible to
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132 people requesting pubsub public subscriptions from your account.
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133
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134 .. note::
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135
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136 Making a subscription public is interesting to show your center of interests and to let
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137 other people discover people that you are subscribed to or who are subscribed to you
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138 (this correspond the the "following" and "followers" feature that is seen on some
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139 software).
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140
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141 However, it also makes your subscription visible to evil entities such as
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142 spammer, bot collectings informations for e.g. marketing or surveillance. In some
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143 locations, it may even be life threating as unwisely making public subscription may
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144 show your political views, sexual orientation, religion, etc.
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145
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146 Furthermore, if you make public subscriptions, your JID may be retrieved easily (public
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147 subscriptions can be checked to see if a JID exists and is used, or your JID can be
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148 simply found from subscribed node, or from your subscribers). This is often desirable
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149 in the case of social interactions, but this is to be known if you're willing to keep
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150 your identifier secret (in this case, don't use public subscriptions).
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151
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152
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153 example
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154 -------
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155
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156 Subscribe to an information blog::
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157
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158 $ li pubsub subscribe -n informations -s pubsub.example.net
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159
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160 Pierre wants to subscribe to Louise blog, and to make it public, so other people can
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161 discover it::
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162
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163 $ li pubsub subscribe -n urn:xmpp:microblog:0 -s louise@example.org --public
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164
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165 unsubscribe
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166 ===========
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167
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168 Unsubscribe from a node.
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169
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170 example
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171 -------
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172
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173 Unsubscribe from an information blog::
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174
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175 $ li pubsub unsubscribe -n informations -s pubsub.example.net
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176
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177 subscriptions
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178 =============
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179
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180 Retrieve subscriptions from a user, or subscriptions for all nodes on a service.
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181
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182 If no service and no node are specified, and if your server supports `XEP-0376 Pubsub
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183 Account Management`_, all subscriptions to any server or node of the profile are returned.
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184
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185 ``-n NODE, --node NODE`` can be used to request subscriptions for a specific node (e.g. if
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186 it has subscription with multiple subIDs).
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187
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188 If ``--public`` is used, only public subscriptions are retrieved. This can be used to find
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189 public subscriptions from an external user. The PEP/Pubsub service of the target entity
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190 must implement `XEP-0465 Public Pubsub Subscriptions`_.
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191
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192 .. _XEP-0376 Pubsub Account Management: https://xmpp.org/extensions/xep-0376.html
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193 .. _XEP-0465 Public Pubsub Subscriptions: https://xmpp.org/extensions/inbox/pubsub-public-subscriptions.html
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194
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195
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196 example
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197 -------
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198
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199 Pierre server supports XEP-0465. To check all the node where he has a subscription, Pierre
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200 can use this command::
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201
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202 $ li pubsub subscriptions
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203
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204 Retrieve all subscriptions on a specific pubsub service::
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205
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206 $ li pubsub subscriptions -s pubsub@example.net
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207
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208 Louise wants to checks to which node Pierre is publicly subscribed. She do it with
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209 following command::
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210
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211 $ li pubsub subscriptions --public -s pierre@example.net
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212
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213 affiliations
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214 ============
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215
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216 Retrieve affiliations for all nodes at a service.
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217
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218 ``-n NODE, --node NODE`` can be used to request affiliation for a specific node.
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219
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220 examples
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221 --------
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222
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223 Retrieve all affiliations at a pubsub service::
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224
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225 $ li pubsub affiliations -s pubsub@example.net
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226
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227 Retrieve affiliation for the ``notes`` node::
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228
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229 $ li pubsub affiliations -s pubsub@example.net -n notes
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230
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231 reference
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232 =========
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233
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234 Send a reference (e.g. a mention) of a pubsub item to an entity.
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235
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236 example
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237 -------
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238
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239 Pierre send a reference to Louise to indicate that she has been mentioned in his blog post
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240 with ID ``from-paris-to-noumea-abcd``::
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241
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242 $ li pubsub reference -s pierre@example.net -n urn:xmpp:microblog:0 -i from-paris-to-noumea-abcd louise@example.org
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243
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244
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245 search
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246 ======
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247
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248 Search items corresponding to one or more filter(s).
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249
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250 ``search`` will check all items (or some of them according to options used) from one or
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251 several nodes (several nodes can be checked if recursion is used, see below). For each
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252 item the given filters will be checked, and all corresponding items will be returned.
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253
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254 This is a resource intensive method (both for server and client), use with caution, and
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255 use MAM to do searching when suitable.
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256
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257 filters
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258 -------
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259
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260 To do a search you one or more filters. Filters are checked in the order in which they are
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261 specified. You can use 4 kinds of filters:
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262
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263 ``-t TEXT, --text TEXT``
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264 do a full-text search. If *TEXT* is appearing anywhere in the item (including in XML
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265 tags or arguments), the item is selected
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266
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267 ``-r EXPRESSION, --regex EXPRESSION``
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268 do a regular expression search. `Python standard re module`_ is used internally, so you
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269 can use its syntax.
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270
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271 ``-x XPATH, --xpath XPATH``
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272 use an `XPath version 1.0`_ expression to filter the query. You can have a look at
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273 `Wikipedia XPath page`_ for a user friendly introduction.
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274
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275 ``-P PYTHON_CODE, --python PYTHON_CODE``
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276 use a Python expression to do a test. The expression must return a boolean (``True`` to
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277 keep item, ``False`` otherwise). From within the Python expression 3 variables are
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278 defined: ``item`` which contain the raw item as a string, and ``item_xml`` which is the
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279 parsed XML as an lxml ``etree.Element`` and ``etree`` which is the ``lxml.etree`` module.
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280
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281 .. _Python standard re module: https://docs.python.org/3.7/library/re.html
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282 .. _XPath version 1.0: https://www.w3.org/TR/1999/REC-xpath-19991116/
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283 .. _Wikipedia XPath page: https://en.wikipedia.org/wiki/XPath
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284
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285 filter modifiers
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286 ----------------
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287
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288 Before each filter you can specify one or more filter modifiers. A modifier will change
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289 filter behaviour, it's a flag which can be used either without argument (then it will
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290 activate the flag), or with an explicit boolean value (i.e. ``true`` or ``false``).
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291
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292 The available filters are:
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293
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294 ``-C [BOOLEAN], --ignore-case [BOOLEAN]``
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295 (don't) ignore case. Filters are normally case sensitive, this modifier change this
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296 behaviour.
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297
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298 ``-I [BOOLEAN], --invert [BOOLEAN]``
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299 (don't) invert effect of following filters. This is applying a logical ``NOT`` to the
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300 filter. This means that instead of keeping item matching the filter, it will keep the
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301 items which are **not** matching the filter.
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302
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303 ``-A [BOOLEAN], --dot-all [BOOLEAN]``
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304 (don't) use `DOTALL`_ option for regex. This filter only makes sense before a
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305 ``--regex`` expression.
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306
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307 ``-k [BOOLEAN], --only-matching [BOOLEAN]``
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308 (don't) keep only the matching part of the item. Normally the whole item is returned,
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309 with this flag, only the part matching the filters are kept.
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310
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311 .. _DOTALL: https://docs.python.org/3.7/library/re.html#re.DOTALL
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312
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313 actions
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314 -------
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315
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316 Once filters are set, you may indicate what do to with the found items. By default they
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317 are printed, but you can also use an other li command, or even an external tool.
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318
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319 The following actions are available:
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320
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321 ``print`` (default)
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322 pretty print the found items.
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323
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324 ``exec``
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325 use the given li command on each found item. Everything after the ``exec`` is used to
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326 indicate the command and arguments to use (you must not specify ``li``, use the command
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327 directly). The service, node and item will be set to match the found item.
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328
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329 ``external``
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330 pipe the raw XML of each item to the given command. Everything after the ``external``
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331 action is used to indicate the command and arguments to use.
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332
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333 recursive search
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334 ----------------
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335
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336 By default, only items in the given node will be filtered, but if you specify a recursion
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337 depth > 0 (using ``-D MAX_DEPTH, --max-depth MAX_DEPTH``), every node linked in item will
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338 be checked too, then node linked in linked item and so on until depth level is reached.
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339
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340 For instance, if you want to find all comments of a blog node containing an http(s) link,
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341 you can do that::
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342
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343 $ li pubsub search -n urn:xmpp:microblog:0 -s user@example.net -D 1 -r 'https?://'
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344
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345 examples
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346 --------
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347
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348 Finding all items containing the text "something interesting" in personal blog::
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349
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350 $ li pubsub search -n urn:xmpp:microblog:0 -M -1 -t "something interesting"
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351
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352 Find which blog items in the last 20 have a body with less than 200 characters (note that
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353 body can be either ``<title>`` or ``<content>``, see `XEP-0277`_ for details). Here we use
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354 a python expression on the text of the body to count the number of characters::
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355
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356 $ li pubsub search -n urn:xmpp:microblog:0 -M 20 --python "len((item_xml.find('.//{http://www.w3.org/2005/Atom}content[@type=\"text\"]') or item_xml.find('.//{http://www.w3.org/2005/Atom}title[@type=\"text\"]')).text) < 200"
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357
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358 Find items published by ``toto@example.net`` among last 30 on a blog node, and use
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359 ``pubsub blog`` command to retrieve id and title. We use ``-N`` to specify the ``pubsub``
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360 namespace which is used in the XPath expression, then we use ``exec`` to run ``blog get -k
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361 title -k id`` on found items::
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362
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363 $ li pubsub search -n some_blog_node -s pubsub.example.net -M 30 -N pubsub http://jabber.org/protocol/pubsub -x '/pubsub:item[starts-with(@publisher, "toto@example.net")]' exec blog get -k title -k id
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364
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365 Find items which have **NOT** a title among last 30 items in our personal blog. As
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366 explained in `XEP-0277`_ Atom's ``<title>`` is always used (even if there is only a body
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367 and no title), so we actually look for items without ``<content>``. We do that with an
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368 XPath looking for this ``atom:content`` element, then we use the ``-I [BOOLEAN], --invert
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369 [BOOLEAN]`` to filter out elements which match.::
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370
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371 $ li pubsub search -n urn:xmpp:microblog:0 -M 30 -I -x //atom:content -N atom http://www.w3.org/2005/Atom
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372
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373 Display authors names from last 10 items and their comments, using the ``-k [BOOLEAN],
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374 --only-matching [BOOLEAN]`` modifier to only display the data we need. We use ``-D 1`` to
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375 do a recursive search of level 1, which will also look into comments nodes (using last 10
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376 items there too)::
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377
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378 $ li pubsub search -n urn:xmpp:microblog:0 -M 10 --only-matching -x //atom:author/atom:name -N atom http://www.w3.org/2005/Atom -D 1
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379
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380 .. _XEP-0277: https://xmpp.org/extensions/xep-0277.html
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381
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382 transform
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383 =========
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384
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385 Modify items using an external command.
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386
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387 ``transform`` will retrieve requested items, and will send each of them to the standard
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388 input (stdin) of the specified command. The output of the command will be used, it can be
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389 3 things:
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390
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391 - a raw XML of the modified item, in which case the item will be republished
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392 - the string ``SKIP``, in which case the item will be ignored
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393 - the string ``DELETE``, in which case the item will be retracted
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394
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395 By default a dry run is done, which means that no item is modified or deleted. To actually
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396 do the transformation, you have to use ``--apply`` argument.
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397
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398 If you have to modify the ``publisher`` of an item, you need specific privileges. The
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399 ``--admin`` allows you do to that, but it must be supported by your PubSub service
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400 (currently only ``Libervia PubSub`` supports this non standard feature).
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401
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402 To modify all items of a node, use the ``-A, --all`` option. This will use `RSM`_
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403 repetitively until all items are treated. Of course that means that your PubSub service
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404 must support RSM. The items being republished, they will reappear on top of your node,
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405 that's why it is recommended to use ``--order-by creation`` option when supported by the
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406 service, to keep consistent order and avoid transforming the same items several times.
72583524cfd3 doc (jp): jp commands are now fully documented:
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407
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408 If the command you're using exit with a non zero code, the process will stop. Use ``-I,
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409 --ignore_errors`` if you want to continue transformation even if an non zero code is
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410 returned.
72583524cfd3 doc (jp): jp commands are now fully documented:
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411
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412 .. _RSM: https://xmpp.org/extensions/xep-0059.html
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413
72583524cfd3 doc (jp): jp commands are now fully documented:
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414 example
72583524cfd3 doc (jp): jp commands are now fully documented:
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415 -------
72583524cfd3 doc (jp): jp commands are now fully documented:
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416
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417 Imagine that you want to replace all occurrences of "SàT" by "Libervia" in your personal blog. You first create a Python script like this:
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418
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419 .. sourcecode:: python
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420
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421 #!/usr/bin/env python3
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422
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423 import sys
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424 item_raw = sys.stdin.read()
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425 if not "SàT" in item_raw:
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426 print("SKIP")
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427 else:
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428 print(item_raw.replace("SàT", "Libervia"))
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429
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430 And save it a some location, e.g. ``~/expand_sat.py`` (don't forget to make it executable
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431 with ``chmod +x ~/expand_sat.py``).
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432
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433 To be sure it's safe, you can first do a dry-run and check the result::
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434
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435 $ li pubsub transform -n urn:xmpp:microblog:0 -A -o creation ~/expand_sat.py
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436
72583524cfd3 doc (jp): jp commands are now fully documented:
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437 Once you have checked that you have the expected behaviour, you can apply the
72583524cfd3 doc (jp): jp commands are now fully documented:
Goffi <goffi@goffi.org>
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438 transformations::
72583524cfd3 doc (jp): jp commands are now fully documented:
Goffi <goffi@goffi.org>
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439
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440 $ li pubsub transform -n urn:xmpp:microblog:0 -A -o creation --apply ~/expand_sat.py
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441
72583524cfd3 doc (jp): jp commands are now fully documented:
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442 And that's it. You can use the same technique for more complex transformations, including
72583524cfd3 doc (jp): jp commands are now fully documented:
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443 modifying the XML (with Python, you can easily do that with standard
72583524cfd3 doc (jp): jp commands are now fully documented:
Goffi <goffi@goffi.org>
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444 ``xml.etree.ElementTree`` module or with ``lxml.etree``).
72583524cfd3 doc (jp): jp commands are now fully documented:
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445
72583524cfd3 doc (jp): jp commands are now fully documented:
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446 uri
72583524cfd3 doc (jp): jp commands are now fully documented:
Goffi <goffi@goffi.org>
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447 ===
72583524cfd3 doc (jp): jp commands are now fully documented:
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diff changeset
448
72583524cfd3 doc (jp): jp commands are now fully documented:
Goffi <goffi@goffi.org>
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449 Build an XMPP URI linking to a PubSub node or item.
72583524cfd3 doc (jp): jp commands are now fully documented:
Goffi <goffi@goffi.org>
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450
72583524cfd3 doc (jp): jp commands are now fully documented:
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451 example
72583524cfd3 doc (jp): jp commands are now fully documented:
Goffi <goffi@goffi.org>
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452 -------
72583524cfd3 doc (jp): jp commands are now fully documented:
Goffi <goffi@goffi.org>
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diff changeset
453
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Goffi <goffi@goffi.org>
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454 Build a link to personal blog::
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Goffi <goffi@goffi.org>
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455
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456 $ li pubsub uri -n urn:xmpp:microblog:0
3041
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Goffi <goffi@goffi.org>
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457
72583524cfd3 doc (jp): jp commands are now fully documented:
Goffi <goffi@goffi.org>
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diff changeset
458 node
72583524cfd3 doc (jp): jp commands are now fully documented:
Goffi <goffi@goffi.org>
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459 ====
72583524cfd3 doc (jp): jp commands are now fully documented:
Goffi <goffi@goffi.org>
parents:
diff changeset
460
3488
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Goffi <goffi@goffi.org>
parents: 3100
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461 Subcommands for node management. Please check :ref:`libervia-cli_pubsub_node`.
3041
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parents:
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462
3873
8b76caa89aa0 doc (cli/pubsub, cli/blog): `attachments` subcommands documentation:
Goffi <goffi@goffi.org>
parents: 3836
diff changeset
463 attachments
8b76caa89aa0 doc (cli/pubsub, cli/blog): `attachments` subcommands documentation:
Goffi <goffi@goffi.org>
parents: 3836
diff changeset
464 ===========
8b76caa89aa0 doc (cli/pubsub, cli/blog): `attachments` subcommands documentation:
Goffi <goffi@goffi.org>
parents: 3836
diff changeset
465
8b76caa89aa0 doc (cli/pubsub, cli/blog): `attachments` subcommands documentation:
Goffi <goffi@goffi.org>
parents: 3836
diff changeset
466 Subcommands to add or remove data attached to pubsub items. Please check
8b76caa89aa0 doc (cli/pubsub, cli/blog): `attachments` subcommands documentation:
Goffi <goffi@goffi.org>
parents: 3836
diff changeset
467 :ref:`libervia-cli_pubsub_attachments`.
8b76caa89aa0 doc (cli/pubsub, cli/blog): `attachments` subcommands documentation:
Goffi <goffi@goffi.org>
parents: 3836
diff changeset
468
3966
9f85369294f3 doc (encryption, cli): pubsub signing documentation:
Goffi <goffi@goffi.org>
parents: 3951
diff changeset
469 signature
9f85369294f3 doc (encryption, cli): pubsub signing documentation:
Goffi <goffi@goffi.org>
parents: 3951
diff changeset
470 =========
9f85369294f3 doc (encryption, cli): pubsub signing documentation:
Goffi <goffi@goffi.org>
parents: 3951
diff changeset
471
9f85369294f3 doc (encryption, cli): pubsub signing documentation:
Goffi <goffi@goffi.org>
parents: 3951
diff changeset
472 Subcommands to handle items signature. Please check :ref:`libervia-cli_pubsub_signature`.
9f85369294f3 doc (encryption, cli): pubsub signing documentation:
Goffi <goffi@goffi.org>
parents: 3951
diff changeset
473
3951
4b8776eb6826 doc (blog, pubsub): documentation on new e2ee arguments for pubsub, and shared secrets handling:
Goffi <goffi@goffi.org>
parents: 3873
diff changeset
474 secret
4b8776eb6826 doc (blog, pubsub): documentation on new e2ee arguments for pubsub, and shared secrets handling:
Goffi <goffi@goffi.org>
parents: 3873
diff changeset
475 ======
4b8776eb6826 doc (blog, pubsub): documentation on new e2ee arguments for pubsub, and shared secrets handling:
Goffi <goffi@goffi.org>
parents: 3873
diff changeset
476
4b8776eb6826 doc (blog, pubsub): documentation on new e2ee arguments for pubsub, and shared secrets handling:
Goffi <goffi@goffi.org>
parents: 3873
diff changeset
477 Subcommands for pubsub node shared secrets management. Please check :ref:`libervia-cli_pubsub_secret`.
4b8776eb6826 doc (blog, pubsub): documentation on new e2ee arguments for pubsub, and shared secrets handling:
Goffi <goffi@goffi.org>
parents: 3873
diff changeset
478
3041
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Goffi <goffi@goffi.org>
parents:
diff changeset
479 hook
72583524cfd3 doc (jp): jp commands are now fully documented:
Goffi <goffi@goffi.org>
parents:
diff changeset
480 ====
72583524cfd3 doc (jp): jp commands are now fully documented:
Goffi <goffi@goffi.org>
parents:
diff changeset
481
3488
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Goffi <goffi@goffi.org>
parents: 3100
diff changeset
482 Subcommands for hooks management. Please check :ref:`libervia-cli_pubsub_hook`.
3612
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Goffi <goffi@goffi.org>
parents: 3611
diff changeset
483
21e7d46b988c doc (cli/pubsub): document pubsub cache management commands
Goffi <goffi@goffi.org>
parents: 3611
diff changeset
484 cache
21e7d46b988c doc (cli/pubsub): document pubsub cache management commands
Goffi <goffi@goffi.org>
parents: 3611
diff changeset
485 =====
21e7d46b988c doc (cli/pubsub): document pubsub cache management commands
Goffi <goffi@goffi.org>
parents: 3611
diff changeset
486
21e7d46b988c doc (cli/pubsub): document pubsub cache management commands
Goffi <goffi@goffi.org>
parents: 3611
diff changeset
487 Subcommands for cache management. Please check :ref:`libervia-cli_pubsub_cache`.