【发布时间】:2015-06-02 10:36:51
【问题描述】:
我有一个文件 Sample.xml,其中包含很多服务 结构是这样的
问题: 输入:队列名称 输出:服务块
样本 输入:ABC.getme2
输出:
<service name="GETME2" min="1" max="10" idleTime="300" backend="ABC">
<handlerContainer className="com.abc.xyz.wqere.abcqwere">
<handler className="com.abc.xyz.qweqweqwe.werwerwerwer"/>
</handlerContainer>
<mqListener queue="ABC.getme2" suggExpiry="30" minExpiry="4" maxExpiry="500" copyMessageId="true"/>
</service>
XML 结构:
<?xml version="1.0" encoding="UTF-8"?>
<deploymentconfig xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<configfile>sample.xml</configfile>
<exceptionsFilterConfigFile>asdasd.xml</exceptionsFilterConfigFile>
<keyInfoConfigFile>asdasd.xml</keyInfoConfigFile>
<services>
<service name="GETME" min="1" max="10" idleTime="300" backend="ABC">
<handlerContainer className="com.abc.xyz.wqere.abcqwere">
<handler className="com.abc.xyz.qweqweqwe.werwerwerwer"/>
</handlerContainer>
<mqListener queue="ABC.getme" suggExpiry="30" minExpiry="4" maxExpiry="500" copyMessageId="true"/>
</service>
<service name="GETME2" min="1" max="10" idleTime="300" backend="ABC">
<handlerContainer className="com.abc.xyz.wqere.abcqwere">
<handler className="com.abc.xyz.qweqweqwe.werwerwerwer"/>
</handlerContainer>
<mqListener queue="ABC.getme2" suggExpiry="30" minExpiry="4" maxExpiry="500" copyMessageId="true"/>
</service>
. . . .a lot of services like this . . . .
. . . .a lot of services like this . . . .
. . . .a lot of services like this . . . .
. . . .a lot of services like this . . . .
</services>
<batchServices>
<batchService name="batch1">
<executor className="com.abc.xyz.qwer.qweqwewqe.ffdsdfsdfsdfsdf" />
</batchService>
<batchService name="batch2">
<executor className="com.abc.xyz.qwer.qweqwewqe.zxcsadsad" />
</batchService>
. . . .a lot of batch services like this . . . .
. . . .a lot of batch services like this . . . .
. . . .a lot of batch services like this . . . .
. . . .a lot of batch services like this . . . .
</batchServices>
<timerservices>
<timerservice> - a lot of timeservice
</timerservices>
<connectionPools>
<pool>
<name>asdasd</name>
<driver>oracle.jdbc.driver.OracleDriver</driver>
<url>$asdasd_URL</url>
<userId>$asdasd_USER</userId>
<password>$asdasd_PASSWORD</password>
<minConnections>0</minConnections>
<maxConnections>10</maxConnections>
<poolUrl>jdbc:asdsad:asdasdsad</poolUrl>
<testSql>select * from abc</testSql>
</pool>
. . a lot of pools. . .
</connectionpools>
</deploymentconfig>
我需要像这样 grep 一个 xml 块:
<service name="GETME" min="1" max="10" idleTime="300" backend="ABC">
<handlerContainer className="com.abc.xyz.wqere.abcqwere">
<handler className="com.abc.xyz.qweqweqwe.werwerwerwer"/>
</handlerContainer>
<mqListener queue="ABC.getme" suggExpiry="30" minExpiry="4" maxExpiry="500" copyMessageId="true"/>
</service>
我只需要提供队列名称
QUEUENAME=INSERT_HERE
grep ______________ $QUEUENAME. . .
我尝试了下面的答案
xmllint --xpath '//service[@name="GETME"]' Sample.xml
和
xmllint --xpath '/services/service[@name="GETME"]' Sample.xml
和
xmlstarlet sel -t -v "/services/service[@name='GETME']/mqListener/@queue" Sample.xml
但没有成功
这是输出:
Usage : xmllint [options] XMLfiles ...
Parse the XML files and output the result of the parsing
--version : display the version of the XML library used
--debug : dump a debug tree of the in-memory document
--shell : run a navigating shell
--debugent : debug the entities defined in the document
--copy : used to test the internal copy implementation
--recover : output what was parsable on broken XML documents
--noent : substitute entity references by their value
--noout : don't output the result tree
--path 'paths': provide a set of paths for resources
--load-trace : print trace of all external entites loaded
--nonet : refuse to fetch DTDs or entities over network
--nocompact : do not generate compact text nodes
--htmlout : output results as HTML
--nowrap : do not put HTML doc wrapper
--valid : validate the document in addition to std well-formed check
--postvalid : do a posteriori validation, i.e after parsing
--dtdvalid URL : do a posteriori validation against a given DTD
--dtdvalidfpi FPI : same but name the DTD with a Public Identifier
--timing : print some timings
--output file or -o file: save to a given file
--repeat : repeat 100 times, for timing or profiling
--insert : ad-hoc test for valid insertions
--compress : turn on gzip compression of output
--html : use the HTML parser
--xmlout : force to use the XML serializer when using --html
--push : use the push mode of the parser
--memory : parse from memory
--maxmem nbbytes : limits memory allocation to nbbytes bytes
--nowarning : do not emit warnings from parser/validator
--noblanks : drop (ignorable?) blanks spaces
--nocdata : replace cdata section with text nodes
--format : reformat/reindent the input
--encode encoding : output in the given encoding
--dropdtd : remove the DOCTYPE of the input docs
--c14n : save in W3C canonical format (with comments)
--exc-c14n : save in W3C exclusive canonical format (with comments)
--nsclean : remove redundant namespace declarations
--testIO : test user I/O support
--catalogs : use SGML catalogs from $SGML_CATALOG_FILES
otherwise XML Catalogs starting from
file:///etc/xml/catalog are activated by default
--nocatalogs: deactivate all catalogs
--auto : generate a small doc on the fly
--xinclude : do XInclude processing
--noxincludenode : same but do not generate XInclude nodes
--loaddtd : fetch external DTD
--dtdattr : loaddtd + populate the tree with inherited attributes
--stream : use the streaming interface to process very large files
--walker : create a reader and walk though the resulting doc
--pattern pattern_value : test the pattern support
--chkregister : verify the node registration code
--relaxng schema : do RelaxNG validation against the schema
--schema schema : do validation against the WXS schema
--schematron schema : do validation against a schematron
--sax1: use the old SAX1 interfaces for processing
--sax: do not build a tree but work just at the SAX level
Libxml project home page: http://xmlsoft.org/
To report bugs or get some help check: http://xmlsoft.org/bugs.html
这是版本
xmllint: using libxml version 20626
【问题讨论】:
-
...所以,您没有支持 XPath 的 xmllint,也没有 xmlstarlet -- 我们真的需要知道您做什么拥有(最近的 Python,也许?),然后我们才能获得更多帮助。
-
我看到了一些在 awk 和 sed 中完成的 XML 解析。这可以使用这些命令来完成吗?我真的不确定我有什么有用的东西。 xmllint 和 xmlstarlet 是最好的选择 - stackoverflow.com/questions/15879169/…
-
不,
awk和sed不足以完成任务。另见stackoverflow.com/questions/1732348/…——它从关于语言理论的(准确)陈述开始。诚然,awk比 BRE 更具表现力,理论上可以在 awk 中编写 XML 解析器,但是 - 与任何其他 XML 解析器一样 - 这将是构建和测试的主要项目;大型 XML 操作库需要以人为单位的努力才能达到完全合规性。 -
您可以使用 awk 创建一些看起来可以运行一段时间的东西,但是如果加上命名空间、cmets、CDATA 部分,您很快就会开始遇到错误。使用适当的 XML 解析器,您会得到真正保证做正确的事。
-
也就是说——任何现代平台都将包含 Python 解释器和适当的 XML 解析器。从 shell 调用 Python 真的没那么难。
标签: xml shell unix xpath xmllint