我想解析 log4j 生成的 xml 日志。 xml 中有一个带有可抛出对象(如果有)的节点。此(多行、选项卡式)文本封装在 CDATA 标记中。
这是整个文件的摘录:
<log4j:event logger="org.codehaus.groovy.grails.web.errors.GrailsExceptionResolver" timestamp="1330083921521" level="ERROR" thread="http-8080-1">
<log4j:message><![CDATA[Exception occurred when processing request: [GET] /test/log/show
Stacktrace follows:]]></log4j:message>
<log4j:throwable><![CDATA[org.xml.sax.SAXParseException: XML document structures must start and end within the same entity.
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1231)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
at test.LogController$_closure2.doCall(LogController.groovy:21)
at test.LogController$_closure2.doCall(LogController.groovy)
at java.lang.Thread.run(Thread.java:662)
]]></log4j:throwable>
</log4j:event>
我用groovys XmlParser解析它:
def parser = new XmlParser(false, false).parse(new File("stack.log"))
return parser.'log4j:event'.collect { l ->
LogEntry entry = new LogEntry()
entry.with {
level = l.'@level'
message = l.'log4j:message'.text()
thread = l.'@thread'
logger = l.'@logger'
timestamp = new Date(l.'@timestamp' as long)
throwable = l.'log4j:throwable'?.text() ?: ''
}
entry
}
“可抛出”字段包含所有文本,但不包含 CR/LF。
有人知道如何应对吗?
提前致谢...
最佳答案
不想只是向你扔代码,但它似乎按预期工作并返回 CRLF
def xml = '''<log>
| <log4j:event logger="org.codehaus.groovy.grails.web.errors.GrailsExceptionResolver" timestamp="1330083921521" level="ERROR" thread="http-8080-1">
| <log4j:message><![CDATA[Exception occurred when processing request: [GET] /test/log/show
|Stacktrace follows:]]></log4j:message>
| <log4j:throwable><![CDATA[org.xml.sax.SAXParseException: XML document structures must start and end within the same entity.
| at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1231)
| at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
| at test.LogController$_closure2.doCall(LogController.groovy:21)
| at test.LogController$_closure2.doCall(LogController.groovy)
| at java.lang.Thread.run(Thread.java:662)
|]]></log4j:throwable>
| </log4j:event>
|</log>'''.stripMargin()
class LogEntry {
def level
def message
def thread
def logger
def timestamp
def throwable
String toString() {
"""EVENT:
| level : $level
| message : $message
| thread : $thread
| logger : $logger
| ts : $timestamp
| thrown : $throwable""".stripMargin()
}
}
def parser = new XmlParser(false, false).parseText( xml )
def entries = parser.'log4j:event'.collect { event ->
new LogEntry().with {
level = event.@level
message = event.'log4j:message'.text()
thread = event.@thread
logger = event.@logger
timestamp = new Date( event.@timestamp as long )
throwable = event.'log4j:throwable'?.text() ?: ''
it
}
}
entries.each {
println it
}
打印:
EVENT:
level : ERROR
message : Exception occurred when processing request: [GET] /test/log/show
Stacktrace follows:
thread : http-8080-1
logger : org.codehaus.groovy.grails.web.errors.GrailsExceptionResolver
ts : Fri Feb 24 11:45:21 GMT 2012
thrown : org.xml.sax.SAXParseException: XML document structures must start and end within the same entity.
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1231)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
at test.LogController$_closure2.doCall(LogController.groovy:21)
at test.LogController$_closure2.doCall(LogController.groovy)
at java.lang.Thread.run(Thread.java:662)
其中有 CRLF 字符,它们应该在...
这是 Groovy 1.8.6 顺便说一句...您使用的是什么版本?您可以升级并重试吗?
关于java - Groovy Xml 解析器忽略 CDATA CRCL,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/9431771/