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annotate mod_delegation/README.markdown @ 4688:05725276fac0

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mod_bookmarks2: Use same default as mod_pep for max_items Should fix the issue with max items until the proper "max" can be used, by following the configured max. While "max" is already in trunk, it's not easily usable in 0.11.x This limit and option was added to mod_pep in Prosody rev aefb96a52f5f
author Kim Alvefur <zash@zash.se>
date Wed, 15 Sep 2021 17:39:37 +0200
parents ea6b5321db50
children 679f1834dbdb
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1 ---
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2 labels:
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3 - 'Stage-Beta'
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4 summary: 'XEP-0355 (Namespace Delegation) implementation'
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5 ...
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6
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7 Introduction
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8 ============
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9
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10 Namespace Delegation is an extension which allows server to delegate
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11 some features handling to an entity/component. Typical use case is an
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12 external PEP service, but it can be used more generally when your
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13 preferred server lack one internal feature and you found an external
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14 component which can do it.
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15
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16 Details
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17 =======
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18
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19 You can have all the details by reading the
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20 [XEP-0355](http://xmpp.org/extensions/xep-0355.html). Only the admin
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21 mode is implemented so far.
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22
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23 Usage
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24 =====
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25
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26 To use the module, like usual add **"delegation"** to your
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27 modules\_enabled. Note that if you use it with a local component, you
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28 also need to activate the module in your component section:
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29
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30 modules_enabled = {
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31 [...]
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32
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33 "delegation";
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34 }
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35
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36 [...]
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37
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38 Component "youcomponent.yourdomain.tld"
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39 component_secret = "yourpassword"
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40 modules_enabled = {"delegation"}
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41
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42 then specify delegated namespaces **in your host section** like that:
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43
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44 VirtualHost "yourdomain.tld"
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45
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46 delegations = {
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47 ["urn:xmpp:mam:0"] = {
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48 filtering = {"node"};
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49 jid = "pubsub.yourdomain.tld";
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50 },
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51 ["http://jabber.org/protocol/pubsub"] = {
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52 jid = "pubsub.yourdomain.tld";
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53 },
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54 }
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55
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56 Here all MAM requests with a "node" attribute (i.e. all MAM pubsub
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57 request) will be delegated to pubsub.yourdomain.tld. Similarly, all
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58 pubsub request to the host (i.e. the PEP requests) will be delegated to
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59 pubsub.yourdomain.tld.
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60
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61 **/!\ Be extra careful when you give a delegation to an entity/component,
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62 it's a powerful access, only do it if you absoly trust the
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63 component/entity, and you know where the software is coming from**
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64
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65 Configuration
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66 =============
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67
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68 The configuration is done with a table which map delegated namespace to
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69 namespace data. Namespace data MUST have a **jid** (in the form **jid =
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70 "delegated@domain.tld"**) and MAY have an additional **filtering**
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71 array. If filtering is present, request with attributes in the array
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72 will be delegated, other will be treated normally (i.e. by Prosody).
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73
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74 If your are not a developper, the delegated namespace(s)/attribute(s)
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75 are most probably specified with the external component/entity you want
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76 to use.
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77
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78 The pseudo-namespace `http://jabber.org/protocol/disco#items:*` is used
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79 to delegate remaining disco#items (i.e. items nodes not already handled
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80 by Prosody itself).
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81
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82 Compatibility
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83 =============
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84
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85 If you use it with Prosody 0.9 and a component, you need to patch
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86 core/mod\_component.lua to fire a new signal. To do it, copy the
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87 following patch in a, for example, /tmp/component.patch file:
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88
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89 diff --git a/plugins/mod_component.lua b/plugins/mod_component.lua
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90 --- a/plugins/mod_component.lua
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91 +++ b/plugins/mod_component.lua
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92 @@ -85,6 +85,7 @@
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93 session.type = "component";
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94 module:log("info", "External component successfully authenticated");
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95 session.send(st.stanza("handshake"));
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96 + module:fire_event("component-authenticated", { session = session });
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97
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98 return true;
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99 end
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100
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101 Then, at the root of prosody, enter:
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102
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103 `patch -p1 < /tmp/component.patch`
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104
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105 ----- ----------------------------------------------------
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106 0.10 Works
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107 0.9 Need a patched core/mod\_component.lua (see above)
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108 ----- ----------------------------------------------------
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109
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110 Note
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111 ====
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112
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113 This module is often used with mod\_privilege (c.f. XEP for more
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114 details)