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我有以下 XML 摘录。完整的 XML 是 OVF 定义。

<?xml version="1.0" encoding="UTF-8"?>
<Envelope xmlns="http://schemas.dmtf.org/ovf/envelope/1" xmlns:cim="http://schemas.dmtf.org/wbem/wscim/1/common" xmlns:ovf="http://schemas.dmtf.org/ovf/envelope/1" xmlns:rasd="http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_ResourceAllocationSettingData" xmlns:vmw="http://www.vmware.com/schema/ovf" xmlns:vssd="http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_VirtualSystemSettingData" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" x xml:lang="en-US">
      <Item>
        <rasd:Caption ovf:msgid="network.eth0.caption"/>
        <rasd:Connection>eth0</rasd:Connection>
        <rasd:Description ovf:msgid="network.eth0.description"/>
        <rasd:ElementName>eth0</rasd:ElementName>
        <rasd:InstanceID>13</rasd:InstanceID>
        <rasd:ResourceSubType>VmxNet3</rasd:ResourceSubType>
        <rasd:ResourceType>10</rasd:ResourceType>
      </Item>
      <Item>
        <rasd:Caption ovf:msgid="network.eth1.caption"/>
        <rasd:Connection>eth1</rasd:Connection>
        <rasd:Description ovf:msgid="network.eth1.description"/>
        <rasd:ElementName>eth1</rasd:ElementName>
        <rasd:InstanceID>14</rasd:InstanceID>
        <rasd:ResourceSubType>VmxNet3</rasd:ResourceSubType>
        <rasd:ResourceType>10</rasd:ResourceType>
      </Item>
      <Item>
        <rasd:Caption ovf:msgid="network.eth2.caption"/>
        <rasd:Connection>eth2</rasd:Connection>
        <rasd:Description ovf:msgid="network.eth2.description"/>
        <rasd:ElementName>eth2</rasd:ElementName>
        <rasd:InstanceID>15</rasd:InstanceID>
        <rasd:ResourceSubType>VmxNet3</rasd:ResourceSubType>
        <rasd:ResourceType>10</rasd:ResourceType>
      </Item>
      <Item>
        <rasd:Caption ovf:msgid="network.eth3.caption"/>
        <rasd:Connection>eth3</rasd:Connection>
        <rasd:Description ovf:msgid="network.eth3.description"/>
        <rasd:ElementName>eth3</rasd:ElementName>
        <rasd:InstanceID>16</rasd:InstanceID>
        <rasd:ResourceSubType>VmxNet3</rasd:ResourceSubType>
        <rasd:ResourceType>10</rasd:ResourceType>
      </Item>     
</Envelope>

我试图在该行<rasd:AutomaticAllocation>false</rasd:AutomaticAllocation>之前插入该行,<rasd:Connection>eth*</rasd:Connection>但不是在所有行上。到目前为止,我已经获得了以下 XSL 并且它可以工作,但问题是我必须对要禁用的每个接口进行硬编码。

<xsl:template match="rasd:Connection[text()='eth0']">
    <xsl:if test="$disableEths='true'">
        <xsl:element name="rasd:AutomaticAllocation">false</xsl:element>
        <xsl:copy-of select="."/>
    </xsl:if>
</xsl:template> 
<xsl:template match="rasd:Connection[text()='eth1']">
    <xsl:if test="$disableEths='true'">
        <xsl:element name="rasd:AutomaticAllocation">false</xsl:element>
        <xsl:copy-of select="."/>
    </xsl:if>
</xsl:template> 
<xsl:template match="rasd:Connection[text()='eth2']">
    <xsl:if test="$disableEths='true'">
        <xsl:element name="rasd:AutomaticAllocation">false</xsl:element>
        <xsl:copy-of select="."/>
    </xsl:if>
</xsl:template>

有没有办法让用户传入一个包含他们想要禁用的分隔值列表的参数,如果没有输入参数,不要禁用它们中的任何一个?如果重要,请使用 xsltproc 作为处理器。

4

2 回答 2

2

正如评论中所建议的,用户是否应该生成一个 xml 文件,例如DisableItems.xml如下所示(顺便说一下,可以从文本分隔文件、.txt、.csv、.tab 等生成,使用通用语言:C#、Java、Perl、PHP、Python、R、VB...):

<?xml version="1.0" encoding="UTF-8"?>
<root>
  <disableitem>eth1</disableitem>
  <disableitem>eth2</disableitem>
  <disableitem>eth3</disableitem>  
</root>

然后,XSLT 可以使用它的document()函数进行相应的搜索。确保其他 xml 文件与原始源 xml 位于同一目录中:

<xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"
               xmlns:rasd="http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_ResourceAllocationSettingData">
<xsl:output version="1.0" encoding="UTF-8" indent="yes" />
<xsl:strip-space elements="*"/>

  <!-- Identity Transform -->
  <xsl:template match="@*|node()">
    <xsl:copy>
      <xsl:apply-templates select="@*|node()"/>
    </xsl:copy>
  </xsl:template>  

  <xsl:template match="rasd:Connection[text()=document('DisableItems.xml')/root/disableitem]">
    <xsl:element name="rasd:AutomaticAllocation">false</xsl:element>
    <xsl:copy-of select="."/>
  </xsl:template>

</xsl:transform>

输出(注意 eth0 未在查找 xml 中指定没有 false 元素)

<?xml version='1.0' encoding='UTF-8'?>
<Envelope xmlns="http://schemas.dmtf.org/ovf/envelope/1" xmlns:cim="http://schemas.dmtf.org/wbem/wscim/1/common" xmlns:ovf="http://schemas.dmtf.org/ovf/envelope/1" xmlns:rasd="http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_ResourceAllocationSettingData" xmlns:vmw="http://www.vmware.com/schema/ovf" xmlns:vssd="http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_VirtualSystemSettingData" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="en-US">
  <Item>
    <rasd:Caption ovf:msgid="network.eth0.caption"/>
    <rasd:Connection>eth0</rasd:Connection>
    <rasd:Description ovf:msgid="network.eth0.description"/>
    <rasd:ElementName>eth0</rasd:ElementName>
    <rasd:InstanceID>13</rasd:InstanceID>
    <rasd:ResourceSubType>VmxNet3</rasd:ResourceSubType>
    <rasd:ResourceType>10</rasd:ResourceType>
  </Item>
  <Item>
    <rasd:Caption ovf:msgid="network.eth1.caption"/>
    <rasd:AutomaticAllocation>false</rasd:AutomaticAllocation>
    <rasd:Connection>eth1</rasd:Connection>
    <rasd:Description ovf:msgid="network.eth1.description"/>
    <rasd:ElementName>eth1</rasd:ElementName>
    <rasd:InstanceID>14</rasd:InstanceID>
    <rasd:ResourceSubType>VmxNet3</rasd:ResourceSubType>
    <rasd:ResourceType>10</rasd:ResourceType>
  </Item>
  <Item>
    <rasd:Caption ovf:msgid="network.eth2.caption"/>
    <rasd:AutomaticAllocation>false</rasd:AutomaticAllocation>
    <rasd:Connection>eth2</rasd:Connection>
    <rasd:Description ovf:msgid="network.eth2.description"/>
    <rasd:ElementName>eth2</rasd:ElementName>
    <rasd:InstanceID>15</rasd:InstanceID>
    <rasd:ResourceSubType>VmxNet3</rasd:ResourceSubType>
    <rasd:ResourceType>10</rasd:ResourceType>
  </Item>
  <Item>
    <rasd:Caption ovf:msgid="network.eth3.caption"/>
    <rasd:AutomaticAllocation>false</rasd:AutomaticAllocation>
    <rasd:Connection>eth3</rasd:Connection>
    <rasd:Description ovf:msgid="network.eth3.description"/>
    <rasd:ElementName>eth3</rasd:ElementName>
    <rasd:InstanceID>16</rasd:InstanceID>
    <rasd:ResourceSubType>VmxNet3</rasd:ResourceSubType>
    <rasd:ResourceType>10</rasd:ResourceType>
  </Item>
</Envelope>
于 2016-01-23T17:10:16.367 回答
0

如果您传入--stringparam带有逗号分隔值列表的字符串的 a ,那么使用 xsltproc 您可以使用 EXSLTstr:tokenize函数,如下所示:

<?xml version="1.0" encoding="UTF-8" ?>
<xsl:stylesheet
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  version="1.0"
  xmlns:str="http://exslt.org/strings"
  exclude-result-prefixes="str"
  xmlns:rasd="http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_ResourceAllocationSettingData">

<xsl:output indent="yes"/>

<xsl:param name="disableEths" select="'true'"/>
<xsl:param name="con-to-change" select="'eth0,eth1,eth2'"/>

<xsl:template match="@* | node()" name="identity"> 
  <xsl:copy> 
    <xsl:apply-templates select="@* | node()"/> 
  </xsl:copy> 
</xsl:template> 

<xsl:template match="rasd:Connection">
  <xsl:choose>
    <xsl:when test=". = str:tokenize($con-to-change, ',') and $disableEths='true'">
        <rasd:AutomaticAllocation>false</rasd:AutomaticAllocation>
        <xsl:copy-of select="."/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:call-template name="identity"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template> 

</xsl:stylesheet>

当然,最好在匹配模式中直接使用参数,但是在 XSLT 1.0 中不允许在匹配模式中使用变量或参数引用,我认为 xsltproc 允许这样做,但是在测试中match="rasd:Connection[. = str:tokenize($con-to-change, ',')]"我得到了一些错误关于未定义变量的消息,因此我可以建议将检查移至模板的上述内容。

于 2016-01-23T12:18:19.920 回答