[Thymeleaf] 템플릿 html 파일 주석 내용으로 인한 500 에러 발생

점프 투 스프링부트 실습중 Thymeleaf 템플릿 파일 파싱중 500 에러가 발생했다.

 

2장 7 질문 목록과 템플릿의 끝부분에 자주 사용하는 타임리프 속성이 나온다.

https://wikidocs.net/161186

2-07 질문 목록과 템플릿

공부 삼아서 타임리프 속성을 주석으로 템플릿 파일에 저장하고 실행하니 이런 에러가 나왔다.

타임리프 주석 부분의 문제로 500 에러 발생

캡처화면으로 한 화면에 나오지 않지만..

"question_list" - line 38, col 15 부분에서 [[]] 로 에러가 발생했다고 나온다.

html 파일이라 주석안에 넣으면 문제가 안될줄 알았는데

타임리프가 주석까지도 파싱할줄은 몰랐다.

https://github.com/cs7998/Jump-to-SpringBoot/commit/45a5d69c91f1d5be0e305c69c9007cd918cbf9f2

[Fix] TemplateInputException Error · cs7998/Jump-to-SpringBoot@45a5d69

 

 

Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.

Sun Feb 26 23:20:27 KST 2023
There was an unexpected error (type=Internal Server Error, status=500).
An error happened during template parsing (template: "class path resource [templates/question_list.html]")
org.thymeleaf.exceptions.TemplateInputException: An error happened during template parsing (template: "class path resource [templates/question_list.html]")
	at org.thymeleaf.templateparser.markup.AbstractMarkupTemplateParser.parse(AbstractMarkupTemplateParser.java:241)
	at org.thymeleaf.templateparser.markup.AbstractMarkupTemplateParser.parseStandalone(AbstractMarkupTemplateParser.java:100)
	at org.thymeleaf.engine.TemplateManager.parseAndProcess(TemplateManager.java:666)
	at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1103)
	at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1077)
	at org.thymeleaf.spring6.view.ThymeleafView.renderFragment(ThymeleafView.java:372)
	at org.thymeleaf.spring6.view.ThymeleafView.render(ThymeleafView.java:192)
	at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1415)
	at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1159)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1098)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:974)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1011)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:903)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:705)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:885)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:814)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:223)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:158)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:185)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:158)
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:185)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:158)
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:185)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:158)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:185)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:158)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:177)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:119)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:400)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:859)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1734)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: org.attoparser.ParseException: Could not parse as expression: "" (template: "question_list" - line 38, col 15)
	at org.attoparser.MarkupParser.parseDocument(MarkupParser.java:393)
	at org.attoparser.MarkupParser.parse(MarkupParser.java:257)
	at org.thymeleaf.templateparser.markup.AbstractMarkupTemplateParser.parse(AbstractMarkupTemplateParser.java:230)
	... 48 more
Caused by: org.thymeleaf.exceptions.TemplateProcessingException: Could not parse as expression: "" (template: "question_list" - line 38, col 15)
	at org.thymeleaf.standard.expression.StandardExpressionParser.parseExpression(StandardExpressionParser.java:131)
	at org.thymeleaf.standard.expression.StandardExpressionParser.parseExpression(StandardExpressionParser.java:62)
	at org.thymeleaf.standard.expression.StandardExpressionParser.parseExpression(StandardExpressionParser.java:44)
	at org.thymeleaf.standard.inline.AbstractStandardInliner.processExpression(AbstractStandardInliner.java:527)
	at org.thymeleaf.standard.inline.AbstractStandardInliner.performInlining(AbstractStandardInliner.java:389)
	at org.thymeleaf.standard.inline.AbstractStandardInliner.inline(AbstractStandardInliner.java:283)
	at org.thymeleaf.standard.processor.StandardInliningCommentProcessor.doProcess(StandardInliningCommentProcessor.java:55)
	at org.thymeleaf.processor.comment.AbstractCommentProcessor.process(AbstractCommentProcessor.java:57)
	at org.thymeleaf.util.ProcessorConfigurationUtils$CommentProcessorWrapper.process(ProcessorConfigurationUtils.java:681)
	at org.thymeleaf.engine.ProcessorTemplateHandler.handleComment(ProcessorTemplateHandler.java:665)
	at org.thymeleaf.engine.TemplateHandlerAdapterMarkupHandler.handleComment(TemplateHandlerAdapterMarkupHandler.java:205)
	at org.attoparser.AbstractChainedMarkupHandler.handleComment(AbstractChainedMarkupHandler.java:193)
	at org.attoparser.HtmlMarkupHandler.handleComment(HtmlMarkupHandler.java:195)
	at org.attoparser.AbstractChainedMarkupHandler.handleComment(AbstractChainedMarkupHandler.java:193)
	at org.attoparser.ParsingCommentMarkupUtil.parseComment(ParsingCommentMarkupUtil.java:54)
	at org.attoparser.MarkupParser.parseBuffer(MarkupParser.java:753)
	at org.attoparser.MarkupParser.parseDocument(MarkupParser.java:301)
	... 50 more