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view xml/en/docs/stream/ngx_stream_mqtt_filter_module.xml @ 2968:3ba229c95e50
Linux packages: documented lack of HTTP/3 support for older distros.
author | Konstantin Pavlov <thresh@nginx.com> |
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date | Tue, 23 May 2023 14:53:59 -0700 |
parents | a85e4d126bc7 |
children | 6e094f915896 |
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<?xml version="1.0"?> <!-- Copyright (C) Nginx, Inc. --> <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd"> <module name="Module ngx_stream_mqtt_filter_module" link="/en/docs/http/ngx_stream_mqtt_filter_module.html" lang="en" rev="1"> <section id="summary"> <para> The <literal>ngx_stream_mqtt_filter_module</literal> module (1.23.4) provides support for Message Queuing Telemetry Transport protocol (MQTT) versions <link url="https://docs.oasis-open.org/mqtt/mqtt/v3.1.1/mqtt-v3.1.1.html">3.1.1</link> and <link url="https://docs.oasis-open.org/mqtt/mqtt/v5.0/mqtt-v5.0.html">5.0</link>. </para> <para> <note> This module is available as part of our <commercial_version>commercial subscription</commercial_version>. </note> </para> </section> <section id="example" name="Example Configuration"> <para> <example> listen 127.0.0.1:18883; proxy_pass backend; proxy_buffer_size 16k; mqtt on; mqtt_set_connect clientid "$client"; mqtt_set_connect username "$name"; </example> </para> </section> <section id="directives" name="Directives"> <directive name="mqtt"> <syntax><literal>on</literal> | <literal>off</literal></syntax> <default>off</default> <context>stream</context> <context>server</context> <para> Enables the MQTT protocol for the given virtual server. </para> </directive> <directive name="mqtt_rewrite_buffer_size"> <syntax><value>size</value></syntax> <default>4k|8k</default> <context>server</context> <para> Sets the <value>size</value> of the buffer used for writing a modified message. By default, the buffer size is equal to one memory page. This is either 4K or 8K, depending on a platform. It can be made smaller, however. </para> </directive> <directive name="mqtt_set_connect"> <syntax><literal>field</literal> <value>value</value></syntax> <default/> <context>server</context> <para> Sets the message <literal>field</literal> to the given <literal>value</literal> for CONNECT message. The following fields are supported: <literal>clientid</literal>, <literal>username</literal>, and <literal>password</literal>. The value can contain text, variables, and their combination. </para> <para> Several <literal>mqtt_set_connect</literal> directives can be specified on the same level: <example> mqtt_set_connect clientid "$client"; mqtt_set_connect username "$name"; </example> </para> </directive> </section> </module>