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15 lines
1.0 KiB
Markdown
# Plugins
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This directory contains plugins for use with Mosquitto.
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## Message timestamp
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This is an **example** plugin to demonstrate how it is possible to attach MQTT v5 properties to messages after they have been received, and before they are sent on to subscribers.
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This plugin attaches a user-property property to each message which contains the ISO-8601 timestamp of the time the message was received by the broker. This means it is possible for MQTT v5 clients to see how old a retained message is, for example.
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## Payload modification
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This is an **example** plugin to demonstrate how it is possible to modify the payload of messages after they have been received, and before they are sent on to subscribers.
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If you are considering using this feature, you should be very certain you have verified the payload is the correct format before modifying it.
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This plugin adds the text string "hello " to the beginning of each payload, so with anything other than simple plain text messages it will corrupt the payload contents. |