xmlstarlet 用于在 xml 字段下插入字符串

Question

我们有一个如下所示的policy.xml文件，需要根据shell脚本的条件，在(

inbound or backend or outbound

)下的xml文件的每个会话下插入如下字符串，示例策略.xml

<base />

要添加的字符串

<policies>
    <inbound>
      <base />
    </inbound>
    <backend>
      <base />
    </backend>
    <outbound>
      <base />
    </outbound>
    <on-error>
      <base />
    </on-error>
</policies>

我们尝试使用 xmlstarlet 来实现此目的，但无法实现我们想要的

例如导入[policies/inbound/base]下的字符串

<rate-limit-by-key calls="xx" renewal-period="xx" counter-key="@(Regex.Match(context.x.y.GetValueOrDefault("xxxxxxx",""), @"^[.x-y]*")?.Value)" />`

我们的脚本

xmlstarlet edit --subnode "//policies/inbound/" xxxxxxxxxxxxxxxx policy.xml > custompolicy.xml

为“入站”成功的条件生成的自定义策略文件的预期输出

#!/bin/bash
################Variables##################
source parse_yaml.sh
eval $(parse_yaml input2.yaml policy)

ipfilter="<rate-limit-by-key calls="xxx" renewal-period="xx" counter-key="@(Regex.Match(context.x.y.GetValueOrDefault("xxxxxxx",""), @"^[.x-y]*")?.Value)" />"

echo ".............Eval Result..............................."
for f in $policy_ ; do eval echo \$f \$${f}_ ; done
echo "............Eval Result................................"
echo " ********policy is ************ "

for f in $policy_ ; do
  if [[ $(eval echo \$${f}_name) == "ipfilter" ]]; then
    echo " given policy name is ipfilter "
    if [[ $(eval echo \$${f}_scope) == "api" ]]; then
    echo "decided the scope of Ipfilter policy as api "
    fi
    for g in $(eval echo \$${f}_apis_); do
     echo " this policy will be applied to apis, $g"
     for h in $(eval echo \$${g}_session_); do
     echo " this policy will be applied to api, $g under sesion $h "
     if [[ $(eval echo \$${g}_session_) == "inbound" ]]; then
     echo "add the add Ipfilter string to the inbound session of xml"
     xmlstarlet edit --subnode "//policies/ibound/" xxxxxxxxxxxxxxxx policy.xml > custompolicy.xml
     fi
     done

Answer 1

XSLT 使用所谓的“身份转换”模式。

您只需要知道如何在您的环境中启动 XSLT 转换。

输入XML

<policies>
    <inbound>
      <base />
      <rate-limit-by-key calls="xxx" renewal-period="xx" counter-key="@(Regex.Match(context.x.y.GetValueOrDefault("xxxxxxx",""), @"^[.x-y]*")?.Value)" />
    </inbound>
    <backend>
      <base />
    </backend>
    <outbound>
      <base />
    </outbound>
    <on-error>
      <base />
    </on-error>
</policies>

XSLT 1.0

<policies>
    <inbound>
        <base/>
    </inbound>
    <backend>
        <base/>
    </backend>
    <outbound>
        <base/>
    </outbound>
    <on-error>
        <base/>
    </on-error>
</policies>

输出XML

<?xml version="1.0"?>
<xsl:stylesheet version="1.0"
                xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
   <xsl:output method="xml" omit-xml-declaration="yes"
               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="inbound | backend | outbound">
        <xsl:copy>
            <xsl:copy-of select="*"/>
            <rate-limit-by-key calls="xx" renewal-period="xx" counter-key='@(Regex.Match(context.x.y.GetValueOrDefault("xxxxxxx",""), @"^[.x-y]*")?.Value)' />
        </xsl:copy>
    </xsl:template>
</xsl:stylesheet>