如何将（JSON转换为XML）请求和响应（XML转换为JSON）以调用外部Soap服务

我是wso2的新手。我的要求是

1）我想将传入的JSON请求转换为XML格式

2）将XML请求发送到外部SOAP服务

3）响应将以XML格式获取，并且需要将其转换为JSON格式

有人做过吗？如果是这样，请您分享您的表现吗？

我具有以下用于PROXY服务的配置

`<?xml version="1.0" encoding="UTF-8"?>
<proxy xmlns="http://ws.apache.org/ns/synapse"
       name="CelsiusToFahrenheitService"
       transports="https,http"
       statistics="disable"
       trace="disable"
       startOnLoad="true">
   <target>
      <inSequence>
         <property name="messageType" value="text/xml" scope="axis2"/>
         <property name="Proxy-Authorization"
                   expression="fn:concat('Basic', base64Encode('INDIA\username:pwd'))"
                   scope="transport"/>
         <property name="POST_TO_URI" value="true" scope="axis2"/>
         <property name="DISABLE_CHUNKING" value="true" scope="axis2"/>
         <header name="Action"
                 value="http://www.w3schools.com/webservices/CelsiusToFahrenheit"/>
         <send>
            <endpoint>
               <address uri="http://www.w3schools.com/webservices/tempconvert.asmx"
                        format="soap11"/>
            </endpoint>
         </send>
      </inSequence>
      <outSequence>
         <property name="messageType" value="text/xml" scope="axis2"/>
         <send/>
      </outSequence>
   </target>
   <description/>
</proxy>`

XML请求

<CelsiusToFahrenheit xmlns="http://www.w3schools.com/webservices/"> <Celsius>20</Celsius> </CelsiusToFahrenheit>

XMl回应

<CelsiusToFahrenheitResponse xmlns="http://www.w3schools.com/webservices/"> <CelsiusToFahrenheitResult>68</CelsiusToFahrenheitResult> </CelsiusToFahrenheitResponse>

需要以JSON形式发送REQUEST，而RESPOSNE也以JSON形式发送

谁能帮我解决这个问题

如何使用ScriptMediator进行上述代理服务。我从这里获得了示例（https://docs.wso2.org/display/ESB481/Sample+441%3A+Converting+JSON+to+XML+Using+JavaScript）

我已经完成了这样的配置（不知道它是否正确）

<?xml version="1.0" encoding="UTF-8"?> <proxy xmlns="http://ws.apache.org/ns/synapse" name="JsonToXMLProxy" transports="https,http" statistics="disable" trace="disable" startOnLoad="true"> <target> <inSequence> <script language="js">var cel= mc.getPayloadJSON().CelsiusToFahrenheit.Celsius.toString(); mc.setPayloadXML( &lt;CelsiusToFahrenheit xmlns="http://www.w3schools.com/webservices/"&gt; &lt;Celsius&gt;{cel}&lt;/Celsius&gt; &lt;/CelsiusToFahrenheit&gt;);</script> <property name="messageType" value="text/xml" scope="axis2"/> <log level="full"/> </inSequence> <outSequence> <log level="full"/> <property name="messageType" value="text/xml" scope="axis2"/> <send/> </outSequence> <endpoint> <address uri="http://www.w3schools.com/webservices/tempconvert.asmx" format="soap11"/> </endpoint> </target> <description/> </proxy>

但是我正在得到这样的例外

`[2014-03-20 18:19:02,391]  INFO - LogMediator To: /services/JsonToXMLProxy.JsonToXMLProxyHttpEndpoint, MessageID: urn:uuid:a2eeeb26-94e1-4ed1-a3f9-79f1d1461821, Direction: request, Envelope: <?xml version="1.0" encoding="utf-8"?><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"><soapenv:Body><CelsiusToFahrenheit xmlns="http://www.w3schools.com/webservices/"><Celsius>20</Celsius></CelsiusToFahrenheit></soapenv:Body></soapenv:Envelope>
[2014-03-20 18:19:03,130]  WARN - ClientHandler Received an unexpected response - of content type : text/html and status code : 411 with reason : Length Required For : 172.26.40.214:8080 For Request : Axis2Request [Message ID : urn:uuid:39d47344-f74c-4ec5-855b-5eb90e178b6d] [Status Completed : true] [Status SendingCompleted : true]
[2014-03-20 18:19:04,133]  INFO - BuilderUtil OMException in getSOAPBuilder
org.apache.axiom.om.OMException: SOAP message MUST NOT contain a Document Type Declaration(DTD)
        at org.apache.axiom.soap.impl.builder.StAXSOAPModelBuilder.createDTD(StAXSOAPModelBuilder.java:462)
        at org.apache.axiom.om.impl.builder.StAXOMBuilder.next(StAXOMBuilder.java:282)
        at org.apache.axiom.soap.impl.builder.StAXSOAPModelBuilder.getSOAPEnvelope(StAXSOAPModelBuilder.java:204)
        at org.apache.axiom.soap.impl.builder.StAXSOAPModelBuilder.<init>(StAXSOAPModelBuilder.java:154)
        at org.apache.axiom.soap.impl.builder.StAXSOAPModelBuilder.<init>(StAXSOAPModelBuilder.java:140)
        at org.apache.axis2.builder.BuilderUtil.getSOAPBuilder(BuilderUtil.java:659)
        at org.apache.axis2.transport.TransportUtils.createDocumentElement(TransportUtils.java:198)
        at org.apache.axis2.transport.TransportUtils.createSOAPMessage(TransportUtils.java:146)
        at org.apache.synapse.transport.nhttp.ClientWorker.run(ClientWorker.java:253)
        at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:172)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
        at java.lang.Thread.run(Thread.java:722)
[2014-03-20 18:19:04,137]  INFO - BuilderUtil Remaining input stream :[]
[2014-03-20 18:19:04,137]  WARN - ClientWorker Unexpected response received. HTTP response code : 411 HTTP status : Length Required exception : SOAP message MUST NOT contain a Document Type Declaration(DTD)
[2014-03-20 18:19:04,153]  INFO - LogMediator To: http://www.w3.org/2005/08/addressing/anonymous, WSAction: , SOAPAction: , MessageID: urn:uuid:39d47344-f74c-4ec5-855b-5eb90e178b6d, Direction: response, Envelope: <?xml version="1.0" encoding="utf-8"?><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"><soapenv:Body><soapenv:Fault><faultcode>411</faultcode><faultstring>Unexpected response received. HTTP response code : 411 HTTP status : Length Required exception : SOAP message MUST NOT contain a Document Type Declaration(DTD)</faultstring><detail>Unexpected response received. HTTP response code : 411 HTTP status : Length Required exception : SOAP message MUST NOT contain a Document Type Declaration(DTD)</detail></soapenv:Fault></soapenv:Body></soapenv:Envelope>`

请帮我解决这个问题

提前致谢。