Azure APIM 中的响应映射

Question

Is there any way which can map my response of API into the required format in azure APIM

eg if my API gave a response like

customer:  {
"id" : 123
}

the output I will be needing is

customer: {
"customerID": 123
} 

Is there any way without using a set-body policy? or is there any way where I can define logic which can map Id value to customerID

Answer 1

您可以使用Find and Replace String in Body策略来获得简单的解决方案。

Answer 2

There are two options:

Simple JSON

If you have simple JSON as you have shown in the question, then Find and Replace transformation policy can be helpful. Please note that this policy would just perform string replace. It does not know anything about JSON format. So you have to be extra careful while replacing anything.

But I assume the JSON might not be that simple in real world scenarios.

Complex JSON

You can implement your custom logic by using Set Body Transformation Policy.

Code would be something like below. You can get the JObject and then query and update it.

<choose>
  <when condition="@(context.Response.StatusCode == 200"> 
    <set-body> 
    @{ 
        JObject inBody = context.Request.Body.As<JObject>();

        // Razor view syntax so you can write code as per your need
        JObject customer= (JObject)inBody["customer"];
        var customerIdValue = ((string)customer["id"]);
        customer["CustomerId"] = customerId;

        customer.Property("id").Remove();

        // assuming customer has a description property
        customer.Property("description").AddAfterSelf(new JProperty("customerId", customerIdValue));
        return inBody.ToString(); 
    } 
    </set-body>
  </when>
</choose>

Answer 3

Could also use set-body with liquid template in outbound of your operation:

<set-body template="liquid">{
    "customer": {
        "customerID": {{body.customer.id}}
    }
}</set-body>