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mod_mam/README.markdown @ 2017:d44ac0756c46

mod_mam: Enable archiving by default, less of a privacy issue if messages expire
author Kim Alvefur <zash@zash.se>
date Tue, 19 Jan 2016 13:34:53 +0100
parent 2016:279885fd9728
child 2022:77b9c7e5fd63
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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-0313: Message Archive Management'
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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 Implementation of [XEP-0313: Message Archive Management].
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11
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12 Details
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13 =======
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14
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15 This module will archive all messages that match the simple rules setup
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16 by the user, and allow the user to access this archive.
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17
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18 Usage
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19 =====
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20
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21 First copy the module to the prosody plugins directory.
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22
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23 Then add "mam" to your modules\_enabled list:
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25 ``` {.lua}
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26 modules_enabled = {
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27 -- ...
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28 "mam",
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29 -- ...
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30 }
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31 ```
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32
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33 Configuration
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34 =============
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35
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36 Option summary
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37 --------------
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38
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39 option type default
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40 ------------------------------ ----------------------- ---------
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41 max\_archive\_query\_results number `50`
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42 default\_archive\_policy boolean or `"roster"` `true`
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43 archive\_expires\_after string `"1w"`
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44
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45 Storage backend
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46 ---------------
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47
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48 mod\_mam uses the store "archive2"[^1]. See [Prosodys data storage
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49 documentation][doc:storage] for information on how to configure storage.
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50
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51 For example, to use mod\_storage\_sql (requires Prosody 0.10 or later):
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53 ``` {.lua}
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54 storage = {
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55 archive2 = "sql";
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56 }
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57 ```
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58
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59 Query size limits
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60 -----------------
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61
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62 max_archive_query_results = 20;
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63
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64 This is the largest number of messages that are allowed to be retrieved
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65 in one request *page*. A query that does not fit in one page will
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66 include a reference to the next page, letting clients page through the
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67 result set. Setting large number is not recomended, as Prosody will be
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68 blocked while processing the request and will not be able to do anything
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69 else.
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70
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71 Archive expiry
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72 --------------
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73
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74 Messages in the archive will expire after some time, by default one
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75 week. This can be changed by setting `archive_expires_after`:
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76
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77 ``` {.lua}
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78 archive_expires_after = "1d" -- one day
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79
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80 archive_expires_after = "1w" -- one week, the default
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81
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82 archive_expires_after = "2m" -- two months
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83
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84 archive_expires_after = "1y" -- one year
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85
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86 archive_expires_after = 60 * 60 -- one hour
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87
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88 archive_expires_after = "never" -- forever
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89 ```
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90
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91 The format is an integer number of seconds or a multiple of a period
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92 given by a suffix that can be one of `d` (day), `w` (week), `m` (month)
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93 or `y` (year). No multiplier means seconds.
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94
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95 Message matching policy
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96 -----------------------
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97
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98 The MAM protocol includes a way for clients to control what messages
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99 should be stored. This allows users to enable or disable archiving by
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100 default or for specific contacts.
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101
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102 ``` {.lua}
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103 default_archive_policy = true
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104 ```
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105
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106 `default_archive_policy =` Meaning
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107 ---------------------------- ------------------------------------------------------
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108 `false` Store no messages. This is the default.
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109 `"roster"` Store messages to/from contacts in the users roster.
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110 `true` Store all messages.
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111
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112 Compatibility
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113 =============
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114
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115 ------- ---------------
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116 trunk Works
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117 0.10 Works [^2]
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118 0.9 Unsupported
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119 0.8 Does not work
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120 ------- ---------------
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121
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122 [^1]: Might be changed to "mam" at some point
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123
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124 [^2]: requires a storage driver with archive support, eg
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125 mod\_storage\_sql in 0.10