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annotate xml/en/docs/stream/ngx_stream_mqtt_preread_module.xml @ 3004:c95cbff9f571
Added info about the Unit 1.31.0 release.
author | Artem Konev <artem.konev@nginx.com> |
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date | Thu, 31 Aug 2023 22:38:02 +0100 |
parents | a85e4d126bc7 |
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1 <?xml version="1.0"?> |
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2 |
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3 <!-- |
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4 Copyright (C) Nginx, Inc. |
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5 --> |
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6 |
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7 <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd"> |
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8 |
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9 <module name="Module ngx_stream_mqtt_preread_module" |
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10 link="/en/docs/http/ngx_stream_mqtt_preread_module.html" |
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11 lang="en" |
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12 rev="1"> |
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13 |
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14 <section id="summary"> |
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15 |
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16 <para> |
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17 The <literal>ngx_stream_mqtt_preread_module</literal> module (1.23.4) allows |
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18 extracting information from the CONNECT message |
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19 of the Message Queuing Telemetry Transport protocol (MQTT) versions |
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20 <link url="https://docs.oasis-open.org/mqtt/mqtt/v3.1.1/mqtt-v3.1.1.html">3.1.1</link> |
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21 and |
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22 <link url="https://docs.oasis-open.org/mqtt/mqtt/v5.0/mqtt-v5.0.html">5.0</link>, |
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23 for example, a username or a client ID. |
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24 </para> |
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25 |
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26 <para> |
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27 <note> |
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28 This module is available as part of our |
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29 <commercial_version>commercial subscription</commercial_version>. |
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30 </note> |
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31 </para> |
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32 |
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33 </section> |
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34 |
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35 |
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36 <section id="example" name="Example Configuration"> |
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37 |
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38 <para> |
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39 <example> |
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40 mqtt_preread on; |
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41 return $mqtt_preread_clientid; |
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42 </example> |
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43 </para> |
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44 |
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45 </section> |
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46 |
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47 |
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48 <section id="directives" name="Directives"> |
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49 |
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50 <directive name="mqtt_preread"> |
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51 <syntax><literal>on</literal> | <literal>off</literal></syntax> |
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52 <default>off</default> |
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53 <context>stream</context> |
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54 <context>server</context> |
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55 |
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56 <para> |
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57 Enables extracting information from the MQTT CONNECT message at |
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58 the <link doc="stream_processing.xml" id="preread_phase">preread</link> phase. |
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59 </para> |
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60 |
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61 </directive> |
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62 |
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63 </section> |
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64 |
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65 |
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66 <section id="variables" name="Embedded Variables"> |
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67 |
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68 <para> |
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69 <list type="tag"> |
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70 |
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71 <tag-name id="var_mqtt_preread_clientid"><var>$mqtt_preread_clientid</var></tag-name> |
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72 <tag-desc> |
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73 the <literal>clientid</literal> value from the CONNECT message |
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74 </tag-desc> |
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75 |
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76 <tag-name id="var_mqtt_preread_username"><var>$mqtt_preread_username</var></tag-name> |
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77 <tag-desc> |
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78 the <literal>username</literal> value from the CONNECT message |
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79 </tag-desc> |
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80 |
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81 </list> |
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82 </para> |
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83 |
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84 </section> |
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85 |
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86 </module> |