我正在尝试在Coldfusion 9上使用带有表格扩展的Markdown。在stackoverflow上有几个关于CF和Markdown的类似问题,但没有一个涉及扩展。
调用pegdown的代码如下:
到目前为止,我已经尝试过以下方法;
- markdownj通过javaloader.cfc
- pegdown通过javaloader.cfc
- showdownjs通过orangepips nice cfc (我会链接所有这些,但只有2个以上的声望)
它们都适用于基本的Markdown,但是没有一个默认支持表格。
pegdown和showdown.js都支持表格扩展。然而,Markdownj目前似乎不支持它,但我认为值得一试。
我认为我的问题在于正确地加载pegdown或showdown中的扩展语法。两者工作方式完全不同,一个是纯Java,另一个是解释Javascript。
对于pegdown
这里的代码非常简单,只使用javaloader加载pegdown及其所需的parboiled库。这部分似乎没有错误,但当我尝试使用pegdown类时,我会得到一个相当普通的错误;
An exception occurred while instantiating a Java object. The class must not be an interface or an abstract class. Error: ''.
调用pegdown的代码如下:
<cfscript>
jClass = [
"#getDirectoryFromPath(getCurrentTemplatePath())#/pegdown/pegdown-1.2.1.jar"
, "#getDirectoryFromPath(getCurrentTemplatePath())#/pegdown/parboiled-core-1.1.3.jar"
];
javaloader = createObject('component','components.javaloader.JavaLoader').init(jClass, true);
variables.pegdown = javaloader.create("org.pegdown.PegDownProcessor");
</cfscript>
<cfdump var="#variables.pegdown#" />
针对 showdownjs:
我尝试将扩展文件(extensions / table.js)添加到评估变量中,并根据文档将扩展变量添加到转换器选项中,但它不起作用。 我猜 showdown.js 不希望在底层的 JavaScript scriptEngineManager 中运行,因为主要的 showdown.js 脚本无法“看到”表格扩展,在第 246 行失败;
The script had an error: sun.org.mozilla.javascript.internal.JavaScriptException: Extension 'undefined' could not be loaded. It was either not found or is not a valid extension. (#246) in at line number 246
我对 showdown.js 的代码是基于上述链接中 Orangepips 的答案。
<cfcomponent output="false" accessors="true">
<cffunction name="init" output="false" access="public" returntype="Showdown" hint="Constructor">
<cfset variables.manager = createObject("java", "javax.script.ScriptEngineManager").init()>
<cfset variables.engine = manager.getEngineByName("javascript")>
<cfreturn this/>
</cffunction>
<cffunction name="toHTML" output="false" access="public" returntype="any" hint="">
<cfargument name="markdownText" type="string" required="true"/>
<cfset var local = structNew()/>
<cfset var bindings = variables.engine.createBindings()>
<cfset var result = "">
<cfset var showdownJS = "" />
<cftry>
<cfset bindings.put("markdownText", arguments.markdownText)>
<cfset variables.engine.setBindings(bindings, createObject("java", "javax.script.ScriptContext").ENGINE_SCOPE)>
<cfset showdownJS &= fileRead('#getDirectoryFromPath(getCurrentTemplatePath())#/showdown.js')>
<cfset showdownJS &= fileRead('#getDirectoryFromPath(getCurrentTemplatePath())#/extensions/table.js')>
<cfset showdownJS &= showdownAdapterJS()>
<cfset result = engine.eval(showdownJS)>
<cfcatch type="javax.script.ScriptException">
<cfset result = "The script had an error: " & cfcatch.Message>
</cfcatch>
</cftry>
<cfreturn result>
</cffunction>
<cffunction name="showdownAdapterJS" output="false" access="private" returntype="string" hint="">
<cfset var local = structNew()/>
<cfsavecontent variable="local.javascript">
<cfoutput>#chr(13)##chr(10)#
var __converter = new Showdown.converter({extensions:['table']});
__converter.makeHtml(markdownText);</cfoutput>
</cfsavecontent>
<cfreturn local.javascript>
</cffunction>
</cfcomponent>
我愿意接受任何想法,对于解决方案并没有特定的偏好。
堆栈跟踪
java.lang.ClassNotFoundException: org.parboiled.BaseParser at
coldfusion.bootstrap.BootstrapClassLoader.loadClass(BootstrapClassLoader.java:235) at
java.lang.ClassLoader.loadClass(Unknown Source) at
com.compoundtheory.classloader.NetworkClassLoader.loadClass(NetworkClassLoader.java:463) at
java.lang.ClassLoader.loadClass(Unknown Source) at
java.lang.ClassLoader.loadClassInternal(Unknown Source) at
java.lang.ClassLoader.defineClass1(Native Method) at
java.lang.ClassLoader.defineClass(Unknown Source) at
java.lang.ClassLoader.defineClass(Unknown Source) at
com.compoundtheory.classloader.NetworkClassLoader.loadClass(NetworkClassLoader.java:450) at
java.lang.ClassLoader.loadClass(Unknown Source) at
java.lang.ClassLoader.loadClassInternal(Unknown Source) at
java.lang.Class.getDeclaredFields0(Native Method) at
java.lang.Class.privateGetDeclaredFields(Unknown Source) at
java.lang.Class.privateGetPublicFields(Unknown Source) at
java.lang.Class.getFields(Unknown Source) at
coldfusion.runtime.java.ObjectHandler.Initialize(ObjectHandler.java:35) at
coldfusion.runtime.java.ObjectHandler.<init>(ObjectHandler.java:30) at
coldfusion.runtime.java.ReflectionCache$1.fetch(ReflectionCache.java:29) at
coldfusion.util.SoftCache.get_statsOff(SoftCache.java:133) at
coldfusion.util.SoftCache.get(SoftCache.java:81) at
coldfusion.runtime.java.ReflectionCache.get(ReflectionCache.java:36) at
coldfusion.runtime.java.JavaProxy.<init>(JavaProxy.java:35) at
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at
sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at
java.lang.reflect.Constructor.newInstance(Unknown Source) at
coldfusion.runtime.java.JavaProxy.CreateObject(JavaProxy.java:166) at
coldfusion.runtime.java.JavaProxy.invoke(JavaProxy.java:80) at
coldfusion.runtime.CfJspPage._invoke(CfJspPage.java:2360) at
cfJavaLoader2ecfc535209679$funcCREATEJAVAPROXY.runFunction(/srv/vhosts/myproject/httpdocs/components/javaloader/JavaLoader.cfc:329) at
coldfusion.runtime.UDFMethod.invoke(UDFMethod.java:472) at
coldfusion.filter.SilentFilter.invoke(SilentFilter.java:47) at
coldfusion.runtime.UDFMethod$ReturnTypeFilter.invoke(UDFMethod.java:405) at
coldfusion.runtime.UDFMethod$ArgumentCollectionFilter.invoke(UDFMethod.java:368) at
coldfusion.filter.FunctionAccessFilter.invoke(FunctionAccessFilter.java:55) at
coldfusion.runtime.UDFMethod.runFilterChain(UDFMethod.java:321) at
coldfusion.runtime.UDFMethod.invoke(UDFMethod.java:220) at
coldfusion.runtime.CfJspPage._invokeUDF(CfJspPage.java:2582) at
cfJavaLoader2ecfc535209679$funcCREATE.runFunction(/srv/vhosts/myproject/httpdocs/components/javaloader/JavaLoader.cfc:87) at
coldfusion.runtime.UDFMethod.invoke(UDFMethod.java:472) at
coldfusion.filter.SilentFilter.invoke(SilentFilter.java:47) at
coldfusion.runtime.UDFMethod$ReturnTypeFilter.invoke(UDFMethod.java:405) at
coldfusion.runtime.UDFMethod$ArgumentCollectionFilter.invoke(UDFMethod.java:368) at
coldfusion.filter.FunctionAccessFilter.invoke(FunctionAccessFilter.java:55) at
coldfusion.runtime.UDFMethod.runFilterChain(UDFMethod.java:321) at
coldfusion.runtime.UDFMethod.invoke(UDFMethod.java:220) at
coldfusion.runtime.TemplateProxy.invoke(TemplateProxy.java:491) at
coldfusion.runtime.TemplateProxy.invoke(TemplateProxy.java:337) at
coldfusion.runtime.CfJspPage._invoke(CfJspPage.java:2360) at
cfpegdown2ecfm1473046932.runPage(/srv/vhosts/myproject/httpdocs/_temp/markdown/pegdown.cfm:22) at
coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:231) at
coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:416) at
coldfusion.runtime.CfJspPage._emptyTcfTag(CfJspPage.java:2722) at
cfApplication2ecfc294205112$funcONREQUEST.runFunction(/srv/vhosts/myproject/httpdocs/Application.cfc:377) at
coldfusion.runtime.UDFMethod.invoke(UDFMethod.java:472) at
coldfusion.runtime.UDFMethod$ReturnTypeFilter.invoke(UDFMethod.java:405) at
coldfusion.runtime.UDFMethod$ArgumentCollectionFilter.invoke(UDFMethod.java:368) at
coldfusion.filter.FunctionAccessFilter.invoke(FunctionAccessFilter.java:55) at
coldfusion.runtime.UDFMethod.runFilterChain(UDFMethod.java:321) at
coldfusion.runtime.UDFMethod.invoke(UDFMethod.java:220) at
coldfusion.runtime.TemplateProxy.invoke(TemplateProxy.java:491) at
coldfusion.runtime.TemplateProxy.invoke(TemplateProxy.java:337) at
coldfusion.runtime.AppEventInvoker.invoke(AppEventInvoker.java:88) at
coldfusion.runtime.AppEventInvoker.onRequest(AppEventInvoker.java:280) at
coldfusion.filter.ApplicationFilter.invoke(ApplicationFilter.java:356) at
coldfusion.filter.RequestMonitorFilter.invoke(RequestMonitorFilter.java:48) at
coldfusion.filter.MonitoringFilter.invoke(MonitoringFilter.java:40) at
coldfusion.filter.PathFilter.invoke(PathFilter.java:94) at
coldfusion.filter.ExceptionFilter.invoke(ExceptionFilter.java:70) at
coldfusion.filter.BrowserDebugFilter.invoke(BrowserDebugFilter.java:79) at
coldfusion.filter.ClientScopePersistenceFilter.invoke(ClientScopePersistenceFilter.java:28) at
coldfusion.filter.BrowserFilter.invoke(BrowserFilter.java:38) at
coldfusion.filter.NoCacheFilter.invoke(NoCacheFilter.java:46) at
coldfusion.filter.GlobalsFilter.invoke(GlobalsFilter.java:38) at
coldfusion.filter.DatasourceFilter.invoke(DatasourceFilter.java:22) at
coldfusion.filter.CachingFilter.invoke(CachingFilter.java:62) at
coldfusion.CfmServlet.service(CfmServlet.java:200) at
coldfusion.bootstrap.BootstrapServlet.service(BootstrapServlet.java:89) at
jrun.servlet.FilterChain.doFilter(FilterChain.java:86) at
com.intergral.fusionreactor.filter.FusionReactorCoreFilter.doRequestNoFilter(FusionReactorCoreFilter.java:712) at
com.intergral.fusionreactor.filter.FusionReactorCoreFilter.doFusionRequest(FusionReactorCoreFilter.java:341) at
com.intergral.fusionreactor.filter.FusionReactorCoreFilter.doFilter(FusionReactorCoreFilter.java:246) at
com.intergral.fusionreactor.filter.FusionReactorFilter.doFilter(FusionReactorFilter.java:121) at
jrun.servlet.FilterChain.doFilter(FilterChain.java:94) at
coldfusion.monitor.event.MonitoringServletFilter.doFilter(MonitoringServletFilter.java:42) at
coldfusion.bootstrap.BootstrapFilter.doFilter(BootstrapFilter.java:46) at
jrun.servlet.FilterChain.doFilter(FilterChain.java:94) at
jrun.servlet.FilterChain.service(FilterChain.java:101) at
jrun.servlet.ServletInvoker.invoke(ServletInvoker.java:106) at
jrun.servlet.JRunInvokerChain.invokeNext(JRunInvokerChain.java:42) at
jrun.servlet.JRunRequestDispatcher.invoke(JRunRequestDispatcher.java:286) at
jrun.servlet.ServletEngineService.dispatch(ServletEngineService.java:543) at
jrun.servlet.jrpp.JRunProxyService.invokeRunnable(JRunProxyService.java:203) at
jrunx.scheduler.ThreadPool$ThreadThrottle.invokeRunnable(ThreadPool.java:428) at
jrunx.scheduler.WorkerThread.run(WorkerThread.java:66)
更新
多亏了barnyr,现在这个问题已经得到解决。
问题出在我对Java的理解不够以及PegDown和Parboiled的一些额外依赖。
Parboiled需要Pegdown的java和core .jars两个文件。
Pegdown需要找到ASM库
我使用了4.1版本并包含了-all-版本。建议只包含必要的asm jars,但目前这已足够让我继续进行下去。
适用于CF9(运行在JRUN / Linux上)的工作代码
<!--- Load some demo markdown content --->
<cfset markdownString = fileRead("#getDirectoryFromPath(getCurrentTemplatePath())#/demo.txt")>
<!--- Directory containing all the necessary jar files. --->
<cfset jarDir = "#getDirectoryFromPath(getCurrentTemplatePath())#pegdown" />
<!--- Array of necessary classes --->
<cfset jClass = [
"#jarDir#/parboiled-java-1.1.3.jar"
, "#jarDir#/asm-all-4.1.jar"
, "#jarDir#/parboiled-core-1.1.3.jar"
, "#jarDir#/pegdown-1.2.1.jar"
] />
<cfset javaloader = createObject('component','components.javaloader.JavaLoader').init(jClass, false) />
<!--- Hex values for different extensions can be found in org.pegdown.Extensions.java (0x20 is for tables support) --->
<cfset variables.pegdown = javaloader.create("org.pegdown.PegDownProcessor").init(javaCast("int", InputBaseN("0x20", 16))) />
<!--- Output the HTML conversion --->
<cfoutput>#variables.pegdown.markdownToHtml(markdownString)#</cfoutput>