Use Custom Variables in Policy Expressions

Q

How to use custom variables created by "set-variable" statements in policy expressions?

✍: FYIcenter.com

A

If you want to access custom variables created by "set-variable" statements, you can use the IReadOnlyDictionary object through "context.Variables".

For example, the following policy creates a custom variable during the inbound processing step and used it in the output processing step:

<inbound>
    <set-variable name="method" value="@(context.Request.Method)"/>
</inbound>
<outbound>
    <trace source="DEBUG">@(context.Variables["method"])</trace>
</outbound>

Â

â‡’ 'choose ... when ...' Statements to Control Execution Flows

â‡ 'set-variable' Statement to Create Custom Variables

â‡‘ Using Azure API Policy

â‡‘â‡‘ Microsoft Azure API Management Tutorials

2018-01-24, 1357👍, 0💬

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💬 2021-10-02 FYIcenter.com: @Joe, just follow "Edit API Operation Policy" tutorial, and enter the above code into the policy file.

💬 2021-09-28 Joe D: Do you have any examples of how you would use this? I am really lost on how to implement this.

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