Mule使用XPath从有效载荷中返回值 [英] Mule Using XPath to return a value out of an Payload

问题描述

好的，我被要求创建一个新问题，所以去吧.

OK I was asked to create a new question so here goes.

我想提取SOAP请求中的变量值

I want to extract the values of variables in a SOAP request

我通过SoapUI将SOAP请求发送到m子流

I send a SOAP request via SoapUI to a mule flow

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ws="http://sms.csir.co.za/">
 <soapenv:Header/>
 <soapenv:Body>
  <ws:sendTextMessage>
    <sender>Jaco</sender>
    <to>08277899863</to>
    <text>Hallo Jaco how are you</text>
  </ws:sendTextMessage>
 </soapenv:Body>
</soapenv:Envelope>

这里是the子流，效果很好.

Here is the mule flow that works fine.

<?xml version="1.0" encoding="UTF-8"?>

<mule xmlns:http="http://www.mulesoft.org/schema/mule/http" xmlns="http://www.mulesoft.org/schema/mule/core" xmlns:doc="http://www.mulesoft.org/schema/mule/documentation"
    xmlns:spring="http://www.springframework.org/schema/beans" version="EE-3.4.2"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-current.xsd
http://www.mulesoft.org/schema/mule/core http://www.mulesoft.org/schema/mule/core/current/mule.xsd
http://www.mulesoft.org/schema/mule/http http://www.mulesoft.org/schema/mule/http/current/mule-http.xsd">
    <flow name="jacoFlow1" doc:name="jacoFlow1">
        <http:inbound-endpoint exchange-pattern="request-response" host="localhost" port="8090" doc:name="HTTP"/>
        <object-to-string-transformer doc:name="Object to String"/>
        <logger message="#[payload]" level="INFO" doc:name="Logger"/>
    </flow>
</mule>

我将记录器更改为此内容以查找值

As soon as I change the logger to this to find the value

 <logger message="#[xpath('//soapenv:Envelope/soapenv:Body/ws:sendTextMessage/text/text()').text]" level="INFO" doc:name="Logger"/>

我收到此错误

Execution of the expression "xpath('//soapenv:Envelope/soapenv:Body/ws:sendTextMessage/text/text()').text" failed. (org.mule.api.expression.ExpressionRuntimeException). Message payload is of type: String

推荐答案

由于XPath表达式使用自定义名称空间(soapenv和ws)，因此需要在添加到配置中的表达式管理器元素中声明它们.请参阅: http://www.mulesoft.org/documentation/display/current/XML +命名空间

Since your XPath expression uses custom namespaces (soapenv and ws) you need to declare them in an expression manager element added to your config. See: http://www.mulesoft.org/documentation/display/current/XML+Namespaces

<mulexml:namespace-manager>
    <mulexml:namespace prefix="soapenv"
                       uri="http://schemas.xmlsoap.org/soap/envelope/"/>
    ...
</mulexml:namespace-manager>

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