将用户名和密码传递给WSO2 ESB中的REST API

我正在使用wso2ESB中的REST API调用另一个具有基本身份验证的服务。

这是我的API代码:

<resource methods="POST" uri-template="/deleteZoneFromEnrolment/">
  <inSequence>
     <property xmlns:ns="http://org.apache.synapse/xsd" name="Authorization" expression="fn:concat('Basic ', base64Encode('user:password'))" scope="transport"></property>
     <property name="DISABLE_CHUNKING" value="true" scope="axis2"></property>
     <payloadFactory media-type="xml">
        <format>
           <enr:DeleteZoneFromEnrolment xmlns:enr="http://someURL/Enrolment.xsd">
              <Enrolment>$1</Enrolment>
              <Zone>$2</Zone>
           </enr:DeleteZoneFromEnrolment>
        </format>
        <args>
           <arg evaluator="json" expression="$.enrolment"></arg>
           <arg evaluator="json" expression="$.zone"></arg>
        </args>
     </payloadFactory>
     <send>
        <endpoint key="dev_enrolmentEndpoint"></endpoint>
     </send>
     <log level="full"></log>
  </inSequence>
  <outSequence>
     <property name="messageType" value="application/json" scope="axis2" type="STRING"></property>
     <send></send>
  </outSequence>
  <faultSequence>
     <sequence key="esb_error_handling_response"></sequence>
  </faultSequence>

我使用json POST调用这个REST API,如下所示:

{
 'enrolment':'whatever',
 'zone':'1'
}

如果我硬编码用户和密码,它很好用。但我要向前迈进一步。我需要使用post JSON来传递这个基本授权,我使用这个post JSON来调用ESB中的REST API,或者设置这个API来通过GET/post调用传递身份验证。

有人知道怎么做吗?这就是我正在尝试但没有成功的事情:

在我调用API(POST)之前,在我的应用程序中 http://esbUrl:8280/api/deleteZoneFromEnrolment ),我在Base64中编码字符串“user:password”,结果如下:“cHJhYmF0aDpwcmFiYXRo”。我这样更改我的API代码:

<resource methods="POST" uri-template="/deleteZoneFromEnrolment/">
  <inSequence>
     <property xmlns:ns="http://org.apache.synapse/xsd" name="Authorization" expression="fn:concat('Basic ', json-eval($.user))" scope="transport"></property>
     <property name="DISABLE_CHUNKING" value="true" scope="axis2"></property>
     <payloadFactory media-type="xml">
        <format>
           <enr:DeleteZoneFromEnrolment xmlns:enr="http://someURL/Enrolment.xsd">
              <Enrolment>$1</Enrolment>
              <Zone>$2</Zone>
           </enr:DeleteZoneFromEnrolment>
        </format>
        <args>
           <arg evaluator="json" expression="$.enrolment"></arg>
           <arg evaluator="json" expression="$.zone"></arg>
           <arg evaluator="json" expression="$.user"></arg>
        </args>
     </payloadFactory>
     <send>
        <endpoint key="dev_enrolmentEndpoint"></endpoint>
     </send>
     <log level="full"></log>
  </inSequence>
  <outSequence>
     <property name="messageType" value="application/json" scope="axis2" type="STRING"></property>
     <send></send>
  </outSequence>
  <faultSequence>
     <sequence key="esb_error_handling_response"></sequence>
  </faultSequence>

以及POST json:

{
 'enrolment':'whatever',
 'zone':'1',
 'user':'cHJhYmF0aDpwcmFiYXRo'
}