How to read document in java-backed web script ???

[dark_rider]

I have a nodeRef that I want to read. I am sure the nodeRef is valid.
When I try to read it like this code ContentReader reader = serviceRegistry.getContentService().getReader(fileNodeRefference, ContentModel.PROP_CONTENT);
it throws an exception

net.sf.acegisecurity.providers.ProviderNotFoundException: No authentication provider for net.sf.acegisecurity.providers.UsernamePasswordAuthenticationToken
   at net.sf.acegisecurity.providers.ProviderManager.doAuthentication(ProviderManager.java:169)
   at net.sf.acegisecurity.AbstractAuthenticationManager.authenticate(AbstractAuthenticationManager.java:49)
   at net.sf.acegisecurity.intercept.AbstractSecurityInterceptor.beforeInvocation(AbstractSecurityInterceptor.java:372)
   at net.sf.acegisecurity.intercept.method.aopalliance.MethodSecurityInterceptor.invoke(MethodSecurityInterceptor.java:77)
   at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
   at org.alfresco.repo.model.ml.MLContentInterceptor.invoke(MLContentInterceptor.java:85)
   at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
   at org.alfresco.repo.security.permissions.impl.ExceptionTranslatorMethodInterceptor.invoke(ExceptionTranslatorMethodInterceptor.java:43)
   at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
   at org.alfresco.repo.audit.AuditComponentImpl.audit(AuditComponentImpl.java:279)
   at org.alfresco.repo.audit.AuditMethodInterceptor.proceedWithAudit(AuditMethodInterceptor.java:228)
   at org.alfresco.repo.audit.AuditMethodInterceptor.proceed(AuditMethodInterceptor.java:195)
   at org.alfresco.repo.audit.AuditMethodInterceptor.invoke(AuditMethodInterceptor.java:140)
   at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
   at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:107)
   at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
   at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
   at $Proxy49.getReader(Unknown Source)
   at org.example.Encrypt.executeImpl(Encrypt.java:109)
   at org.springframework.extensions.webscripts.DeclarativeWebScript.execute(DeclarativeWebScript.java:64)
   at org.alfresco.repo.web.scripts.RepositoryContainer$2.execute(RepositoryContainer.java:367)
   at org.alfresco.repo.transaction.RetryingTransactionHelper.doInTransaction(RetryingTransactionHelper.java:321)
   at org.alfresco.repo.web.scripts.RepositoryContainer.transactionedExecute(RepositoryContainer.java:417)
   at org.alfresco.repo.web.scripts.RepositoryContainer.transactionedExecuteAs(RepositoryContainer.java:434)
   at org.alfresco.repo.web.scripts.RepositoryContainer.executeScript(RepositoryContainer.java:298)
   at org.springframework.extensions.webscripts.AbstractRuntime.executeScript(AbstractRuntime.java:319)
   at org.springframework.extensions.webscripts.AbstractRuntime.executeScript(AbstractRuntime.java:177)
   at org.springframework.extensions.webscripts.servlet.WebScriptServlet.service(WebScriptServlet.java:116)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
   at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
   at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
   at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
   at java.lang.Thread.run(Thread.java:619)
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and xml file content is

<webscript>
<shortname>Encrypt File</shortname>
<description>Encrypt file contents</description>
<url>/encrypt/{folderpath}?nodeRef={nodeRef?}</url>
<authentication>user</authentication>
</webscript>
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Where am I wrong, is there any idea?

[mrogers]

You have a security exception there, how has the current thread been authenticated?

[gyro_gearless]

Hmmm, shouldn't the webscript framework handle the authentication itself? So i suspect there is something worng either the invocation of the webscript or its configuration…

@Dark_rider: Can you post the configuration  details from your -context.xml and the URL used to invoke the webscript?

Cheers
Gyro