Azure API 管理服务集正文策略 - 修改 JSON 对 return 某些字段的响应

Question

基于

Azure API Management Service "Set body" Policy

我们可以修改 API 服务的响应。例如，而不是 returning 下面：

{ 
  "company" : "Azure",
  "service" : "API Management"
}

我们只想 return :

{ "company" : "Azure" }

我不确定如何完成此操作，因为我不知道他们在文档中使用了哪种编程语言/语法，如下所示：

<set-body>  
@{   
    string inBody = context.Request.Body.As<string>(preserveContent: true);   
    if (inBody[0] =='c') {   
        inBody[0] = 'm';   
    }   
    return inBody;   
}  
</set-body>

Answer 1

您所看到的叫做 Policy expressions，在 official documentation here 上有很好的描述。该网站的简短引述如下：

Policy expressions syntax is C# 6.0. Each expression has access to the implicitly provided context variable and an allowed subset of .NET Framework types.

set-body samples 中更合适的示例是过滤输出的示例：

<!-- Copy this snippet into the outbound section to remove a number of data elements from the response received from the backend service based on the name of the api product -->  
    <set-body>@{  
        var response = context.Response.Body.As<JObject>();  
        foreach (var key in new [] {"minutely", "hourly", "daily", "flags"}) {  
          response.Property (key).Remove ();  
        }  
        return response.ToString();  
      }  
    </set-body>

要为您的特定对象自定义它 - 您想要删除 service 属性:

    <set-body>@{  
        var response = context.Response.Body.As<JObject>();  
        foreach (var key in new [] {"service"}) {  
          response.Property (key).Remove ();  
        }  
        return response.ToString();  
      }  
    </set-body>

Azure API 管理服务集正文策略 - 修改 JSON 对 return 某些字段的响应

Azure API Management Service Set body Policy - modify JSON response to return certain fields

azure

azure-api-management