xpath - 将没有节点本身的xml节点内容提取到jmeter中的变量中

Question

在我的 JMeter 场景中，我正在测试 SOAP Web 服务。我将初始请求发送到 Web 服务 S1，然后使用它的响应来构建对 S2 的请求。S1 的响应格式如下：

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Body>
    <s:response xmlns:s="http://custom.namespace.com/namespace">
    ...
        <s:responseDetails>
            <s:detail1>some info</s:detail>
            <s:detail2>another info<s:detail2>
            ...
        </s:responseDetails>
    </s:response>
</soap:Body>
</soap:Envelope>

我需要使用里面的所有东西<s:responseDetails>来构建对 S2 的请求，但包装在不同的 xml 元素中：

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:s="http://custom.namespace.com/namespace">
<soap:Body>
    <s:request>
        <s:details>
            <s:detail1>some info</s:detail>
            <s:detail2>another info<s:detail2>
            ...
        </s:details>
    </s:request>
</soap:Body>
</soap:Envelope>

请注意请求中的元素<s:details>而不是<s:responseDetails>.

我从 XPath 提取器开始，希望使用 XPath 表达式将<s:responseDetails>标记下的所有内容放入 JMeter 变量中：

• //*[local-name()='responseDetails']/node()- 给我一组具有不同子级的 JMeter 变量<s:responseDetails>，而我希望它们位于一个变量中
• //*[local-name()='responseDetails']- 给我整个节点<s:responseDetails>，由于存在根标签，我无法使用<s:responseDetails>，我需要用它替换<s:details>

将所有内容放入变量的正确表达式是什么<s:responseDetails>，以便我以后可以使用

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:s="http://custom.namespace.com/namespace">
<soap:Body>
    <s:request>
        <s:details>
            ${details}
        </s:details>
    </s:request>
</soap:Body>
</soap:Envelope>

或者也许还有另一种方法可以解决我的问题？

Answer 1

请执行下列操作：

1）添加XPath提取器，就像你做的那样：

• 参考名称：responseFragment
• XPath 查询：//s:response/s:responseDetails
• 使用命名空间=true

2）添加一个Beanshell采样器：

String fragment = vars.get("responseFragment");
// Improve this replacement by regexp to avoid side effects
String newFragment = fragment.replace("responseDetails","details");
 vars.put("modifiedFragment", newFragment);

3）然后使用：${modifiedFragment}

请注意，Beanshell 采样器会稍微降低 JMeter 的性能，但应该是合理的。

请注意，您可以使用外部文件中的 groovy 底层语言和脚本将 Beanshell 采样器替换为 JSR 223。

使用 JMeter > 2.7 版本的性能将优于 beanshell 解决方案，因为新版本的 JMeter 引入了一种新的缓存机制，该机制将“编译”Groovy 脚本并使其几乎与 Java 类一样高效。

自 2012 年 9 月 3 日起，此机制在JMeter Nightly build中可用。

JMeter 测试计划示例：

    <?xml version="1.0" encoding="UTF-8"?>
<jmeterTestPlan version="1.2" properties="2.3" jmeter="2.8-SNAPSHOT.20120903">
  <hashTree>
    <TestPlan guiclass="TestPlanGui" testclass="TestPlan" testname="Test Plan" enabled="true">
      <stringProp name="TestPlan.comments"></stringProp>
      <boolProp name="TestPlan.functional_mode">false</boolProp>
      <boolProp name="TestPlan.serialize_threadgroups">false</boolProp>
      <elementProp name="TestPlan.user_defined_variables" elementType="Arguments" guiclass="ArgumentsPanel" testclass="Arguments" testname="User Defined Variables" enabled="true">
        <collectionProp name="Arguments.arguments"/>
      </elementProp>
      <stringProp name="TestPlan.user_define_classpath"></stringProp>
    </TestPlan>
    <hashTree>
      <ThreadGroup guiclass="ThreadGroupGui" testclass="ThreadGroup" testname="Thread Group" enabled="true">
        <stringProp name="ThreadGroup.on_sample_error">continue</stringProp>
        <elementProp name="ThreadGroup.main_controller" elementType="LoopController" guiclass="LoopControlPanel" testclass="LoopController" testname="Loop Controller" enabled="true">
          <boolProp name="LoopController.continue_forever">false</boolProp>
          <stringProp name="LoopController.loops">1</stringProp>
        </elementProp>
        <stringProp name="ThreadGroup.num_threads">1</stringProp>
        <stringProp name="ThreadGroup.ramp_time">1</stringProp>
        <longProp name="ThreadGroup.start_time">1346673693000</longProp>
        <longProp name="ThreadGroup.end_time">1346673693000</longProp>
        <boolProp name="ThreadGroup.scheduler">false</boolProp>
        <stringProp name="ThreadGroup.duration"></stringProp>
        <stringProp name="ThreadGroup.delay"></stringProp>
      </ThreadGroup>
      <hashTree>
        <JavaSampler guiclass="JavaTestSamplerGui" testclass="JavaSampler" testname="Java Request" enabled="true">
          <elementProp name="arguments" elementType="Arguments" guiclass="ArgumentsPanel" testclass="Arguments" enabled="true">
            <collectionProp name="Arguments.arguments">
              <elementProp name="Sleep_Time" elementType="Argument">
                <stringProp name="Argument.name">Sleep_Time</stringProp>
                <stringProp name="Argument.value">100</stringProp>
                <stringProp name="Argument.metadata">=</stringProp>
              </elementProp>
              <elementProp name="Sleep_Mask" elementType="Argument">
                <stringProp name="Argument.name">Sleep_Mask</stringProp>
                <stringProp name="Argument.value">0xFF</stringProp>
                <stringProp name="Argument.metadata">=</stringProp>
              </elementProp>
              <elementProp name="Label" elementType="Argument">
                <stringProp name="Argument.name">Label</stringProp>
                <stringProp name="Argument.value">OK</stringProp>
                <stringProp name="Argument.metadata">=</stringProp>
              </elementProp>
              <elementProp name="ResponseCode" elementType="Argument">
                <stringProp name="Argument.name">ResponseCode</stringProp>
                <stringProp name="Argument.value">200</stringProp>
                <stringProp name="Argument.metadata">=</stringProp>
              </elementProp>
              <elementProp name="ResponseMessage" elementType="Argument">
                <stringProp name="Argument.name">ResponseMessage</stringProp>
                <stringProp name="Argument.value">200</stringProp>
                <stringProp name="Argument.metadata">=</stringProp>
              </elementProp>
              <elementProp name="Status" elementType="Argument">
                <stringProp name="Argument.name">Status</stringProp>
                <stringProp name="Argument.value">OK</stringProp>
                <stringProp name="Argument.metadata">=</stringProp>
              </elementProp>
              <elementProp name="SamplerData" elementType="Argument">
                <stringProp name="Argument.name">SamplerData</stringProp>
                <stringProp name="Argument.value"></stringProp>
                <stringProp name="Argument.metadata">=</stringProp>
              </elementProp>
              <elementProp name="ResultData" elementType="Argument">
                <stringProp name="Argument.name">ResultData</stringProp>
                <stringProp name="Argument.value">&lt;soap:Envelope xmlns:soap=&quot;http://schemas.xmlsoap.org/soap/envelope/&quot;&gt; &lt;soap:Body&gt;     &lt;s:response xmlns:s=&quot;http://custom.namespace.com/namespace&quot;&gt;         &lt;s:responseDetails&gt;             &lt;s:detail1&gt;some info&lt;/s:detail1&gt;             &lt;s:detail2&gt;another info&lt;/s:detail2&gt;         &lt;/s:responseDetails&gt;     &lt;/s:response&gt; &lt;/soap:Body&gt; &lt;/soap:Envelope&gt;</stringProp>
                <stringProp name="Argument.metadata">=</stringProp>
              </elementProp>
            </collectionProp>
          </elementProp>
          <stringProp name="classname">org.apache.jmeter.protocol.java.test.JavaTest</stringProp>
        </JavaSampler>
        <hashTree>
          <XPathExtractor guiclass="XPathExtractorGui" testclass="XPathExtractor" testname="XPath Extractor" enabled="true">
            <stringProp name="XPathExtractor.default"></stringProp>
            <stringProp name="XPathExtractor.refname">TOTO</stringProp>
            <stringProp name="XPathExtractor.xpathQuery">//s:response/s:responseDetails</stringProp>
            <boolProp name="XPathExtractor.validate">false</boolProp>
            <boolProp name="XPathExtractor.tolerant">false</boolProp>
            <boolProp name="XPathExtractor.namespace">true</boolProp>
            <boolProp name="XPathExtractor.whitespace">true</boolProp>
          </XPathExtractor>
          <hashTree/>
        </hashTree>
        <DebugSampler guiclass="TestBeanGUI" testclass="DebugSampler" testname="Debug Sampler" enabled="true">
          <boolProp name="displayJMeterProperties">false</boolProp>
          <boolProp name="displayJMeterVariables">true</boolProp>
          <boolProp name="displaySystemProperties">false</boolProp>
        </DebugSampler>
        <hashTree/>
        <ResultCollector guiclass="ViewResultsFullVisualizer" testclass="ResultCollector" testname="View Results Tree" enabled="true">
          <boolProp name="ResultCollector.error_logging">false</boolProp>
          <objProp>
            <name>saveConfig</name>
            <value class="SampleSaveConfiguration">
              <time>true</time>
              <latency>true</latency>
              <timestamp>true</timestamp>
              <success>true</success>
              <label>true</label>
              <code>true</code>
              <message>false</message>
              <threadName>true</threadName>
              <dataType>false</dataType>
              <encoding>false</encoding>
              <assertions>true</assertions>
              <subresults>false</subresults>
              <responseData>false</responseData>
              <samplerData>false</samplerData>
              <xml>false</xml>
              <fieldNames>false</fieldNames>
              <responseHeaders>false</responseHeaders>
              <requestHeaders>false</requestHeaders>
              <responseDataOnError>false</responseDataOnError>
              <saveAssertionResultsFailureMessage>false</saveAssertionResultsFailureMessage>
              <assertionsResultsToSave>0</assertionsResultsToSave>
              <bytes>true</bytes>
              <hostname>true</hostname>
              <threadCounts>true</threadCounts>
              <sampleCount>true</sampleCount>
            </value>
          </objProp>
          <stringProp name="filename"></stringProp>
        </ResultCollector>
        <hashTree/>
      </hashTree>
    </hashTree>
  </hashTree>
</jmeterTestPlan>

另一种方式：

1）添加XPath提取器，就像你做的那样：

• 参考名称：responseFragment
• XPath 查询：//s:response/s:responseDetails/*
• 使用命名空间=true

2）添加一个Beanshell采样器：

int number = Integer.parseInt(vars.get("fullAnswer_matchNr"));
StringBuilder builder = new StringBuilder();
for(int i=0;i<number;i++) {
     builder.append(vars.get("fullAnswer_"+(i+1)));
}
vars.put("body", builder.toString());

3）使用身体

这个比较干净，因为没有替代品

Answer 2

您能否省略<s:details>标签并像这样发送请求：

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:s="http://custom.namespace.com/namespace">
<soap:Body>
    <s:request>
        ${details}
    </s:request>
</soap:Body>
</soap:Envelope>