我构建了一个基本上期望不同于最终端点期望接收的JSON输入对象的代理。因此,为了将请求对象从一个连接到另一个,我使用AssingMessage策略来转换json输入。如何在APIGEE中忽略JSON AssignMessage载荷中的空值?
我在做这样的事情:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<AssignMessage async="false" continueOnError="false" enabled="true" name="Assign-Message-Sample">
<DisplayName>Assign Message-Sample</DisplayName>
<Remove>
<Headers>
<Header name="login_id"/>
<Header name="Authorization"/>
</Headers>
<Payload>true</Payload>
</Remove>
<Set>
<Payload contentType="application/json">
{
"valueA": "{clientrequest.valueA}",
"valueB": "{clientrequest.valueB}",
"valueC": "{clientrequest.valueC}",
"valueD": "{clientrequest.valueD}",
"valueE": "{clientrequest.valueE}",
"valueF": "{clientrequest.valueF}",
}
</Payload>
<Verb>POST</Verb>
</Set>
<IgnoreUnresolvedVariables>true</IgnoreUnresolvedVariables>
<AssignTo createNew="false" transport="http" type="request"/>
</AssignMessage>
问题是当某些值是空的。目标服务器不能正确处理任何空值(从我的控制中转义)。
我的问题是:如果值为空,我怎样才能完全跳过一个参数?
我正在寻找这样的事情(或更好的选择):
<Payload contentType="application/json">
{
<skip-if-empty name="clientrequest.valueA">
"valueA": "{clientrequest.valueA}",
</skip-if-empty>
"valueB": "{clientrequest.valueB}",
...
}
</Payload>