title: Param-mapping Plugin keywords: [“param-mapping-plugin”] description: param-mapping-plugin

1. Overview

1.1 Plugin Name

  • ParamMapping Plugin

1.2 Appropriate Scenario

  • Add/remove/replace certain fixed parameters to the request

1.3 Plugin functionality

  • paramMapping is used to edit your request parameters.

1.4 Plugin code

  • Core Module shenyu-plugin-param-mapping

  • Core Class org.apache.shenyu.plugin.param.mapping.ParamMappingPlugin

1.5 Added Since Which shenyu version

  • Since ShenYu 2.4.0

2. How to use plugin

2.1 Plugin-use procedure chart

2.2 Import pom

  • Introduce paramMapping dependency in the pom.xml file of the gateway.
<!-- apache shenyu param_mapping plugin start-->
<dependency>
  <groupId>org.apache.shenyu</groupId>
  <artifactId>shenyu-spring-boot-starter-plugin-param-mapping</artifactId>
  <version>${project.version}</version>
</dependency>
<!-- apache shenyu param_mapping plugin end-->

2.3 Enable plugin

  • In shenyu-admin --> BasicConfig --> Plugin --> paramMapping set Status enabled.

2.4 Config plugin

2.4.1 Plugin Config

  • you should open this plugin when using.

2.4.2 Selector Config

  • Selectors and rules, please refer to:Selector And Rule Config。

  • Only those matched requests can be modified your request body.

2.4.3 Rule Config

  • param details:

    • addParameterKeys: add a new key-value on body
    • replaceParameterKeys: replace request body's key ，key is the value to be replaced，value is the value after replacement
    • removeParameterKeys: remove a body key

  • param_mapping modify the request body is achieved through JSONPath , $. represents the root directory.

2.5 Examples

2.5.1 Add parameters in request

2.5.1.1 Config Plugin

  • you should open the plugin when using.

2.5.1.2 Selector Config

2.5.1.3 Rule Config

use the configuration，unopened the plugin，request body is:

{"id":3,"data":{"value":"18","age":"36"}}

2.5.1.4 Check Result

open the plugin，the final request body is

{"name":"shenyu","userId":3,"data":{"age":"36"}}

add a new key-value name:shenyu,replace the key id to userId, remove the key data.value .

3. How to disable plugin

  • In shenyu-admin --> BasicConfig --> Plugin --> paramMapping set Status disable.