'choose ... when ...' Statements to Control Execution Flows

Q

How to use 'choose ... when ..." policy statements to control execution flows?

✍: FYIcenter.com

A

If you want to control execution flows in Azure API management process, you can use the 'choose ... when ..." policy statement.

The "choose ... when ..." statement has the following syntax:

<choose>   
    <when condition="Boolean_expression">   
        ...
    </when>   
    <when condition="Boolean_expression">   
        ...
    </when>   
    <otherwise>   
        ...
    </otherwise>   
</choose>

For example,

<choose>  
  <when condition="@(context.Variables.GetValueOrDefault&lt;bool>("isMobile"))">  
    <set-query-parameter name="mobile" exists-action="override">  
      <value>true</value>  
    </set-query-parameter>  
  </when>  
  <otherwise>  
    <set-query-parameter name="mobile" exists-action="override">  
      <value>false</value>  
    </set-query-parameter>  
  </otherwise>  
</choose>

⇒ Policy to Modify Request and Response Body

⇐ Use Custom Variables in Policy Expressions

⇑ Using Azure API Policy

⇑⇑ Microsoft Azure API Management Tutorials

2018-01-19, 2434👍, 0💬

Dump Everything from 'context.Request'
How to build a test service operation to dump everything from the "context.Request" object in the response in Azure API Policy? If you want to build a test service operation to dump everything from the request to the response with an Azure API policy, you can follow this tutorial: 1. Go to the publi... 2018-01-24, 10391👍, 0💬

'set-variable' Statement to Create Custom Variables
How to use the "set-variable" Policy Statement to create custom variables for an Azure API service operation? The "set-variable" policy statement allows you to create custom variables with given values to be used later in other policy statements. The "set-variable" statement has the following syntax... 2018-01-24, 8448👍, 0💬

'xml-to-json' Policy Statement
How to use "xml-to-json" Azure API Policy Statement? The "xml-to-json" Policy Statement allows you to convert the body of the inbound request or outbound response from XML format to JSON format. For example, the following "xml-to-json" policy statement converts the outbound response from XML format ... 2021-10-02, 5407👍, 2💬

💬 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.

'json-to-xml' Azure API Policy Statement
How to use "json-to-xml" Azure API Policy Statement? The "json-to-xml" Policy Statement allows you to convert the body of the inbound request or outbound response from JSON format to XML format. For example, the following "json-to-xml" policy statement converts the output response from JSON format t... 2023-04-25, 4861👍, 2💬

💬 2023-04-23 FYIcenter.com: @lynette, maybe you can add an 'xsl-transform' statement to convert the <document> element something else.

💬 2023-04-19 lynette temple: what do i do if i dont need the <document> element?

'find-and-replace' Policy Statement
How to use the "find-and-replace" Policy Statement for an Azure API service operation? The "find-and-replace" Policy Statement allows you to find and replace a sub string in the request body or response body. For example, the following inbound policy will replace "$id" by the template parameter "id"... 2018-01-19, 3928👍, 0💬

'xsl-transform' Azure API Policy Statement
How to use "xsl-transform" Azure API Policy Statement? The "xsl-transform" Policy Statement allows you to apply an XSL transformation to XML in the body of the inbound request or outbound response. The "xsl-transform" Policy Statement uses the following syntax: <xsl-transform> <... 2017-12-04, 3390👍, 0💬

Using .NET CLR Types in Azure API Policy
How to use .NET CLR Types in Azure API Policy? By default, Azure imports many basic .NET CLR (Common Language Runtime) types into the API policy execution environment. Imported .NET CLR types can be used in any "@(...)" expressions or "@{...}" expression blocks. For example, the following "@{...}" e... 2018-01-24, 2697👍, 0💬

Policy to Modify Request and Response Body
Where to find tutorials on creating Policy to Modify Request and Response Body on Azure API Management Policy? Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on creating Policy to Modify Request and Request Body on Azure API Management Policy. 'f... 2018-01-19, 2538👍, 0💬

'choose ... when ...' Statements to Control Execution Flows
How to use 'choose ... when ..." policy statements to control execution flows? If you want to control execution flows in Azure API management process, you can use the 'choose ... when ..." policy statement. The "choose ... when ..." statement has the following syntax: <choose> <... 2018-01-19, 2435👍, 0💬

All rights in the contents of this web site are reserved by the individual author. fyicenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.