I have created a magnolia module and added custom endpoints to upload and
download a file. To upload a file I am using
[code]MgnlContent.getPostedForm()[/code]
and it is working fine, but while downloading I am getting
[code]NullPointerException[/code]
This below is my download code
[code]Picture picture =
userService.getUserPicture(getUserId(request));
OutputStream stream = response.getOutputStream();
org.apache.commons.io.IOUtils.copy(picture.getStream(), stream);
response.setHeader("Content-Disposition", "filename=" +
picture.getName());
response.setHeader("Content-Type", picture.getMimeType());[/code]
When I print the
[code]picture.getStream()[/code] and [code]picture.getName()[/code] on the
standard output below is what gets printed
[code]org.apache.jackrabbit.core.data.LazyFileInputStream@62aaf43e
IMG_20150313_195522382[/code]
So, I can see that input stream is not null. The below is the error stack trace
[code]SEVERE: Servlet.service() for servlet [default] in context with path
[/magnoliaAuthor] threw exception
java.lang.NullPointerException
at org.apache.commons.io.FileUtils.openInputStream(FileUtils.java:291)
at
info.magnolia.module.cache.filter.CacheResponseWrapper.replayContent(CacheResponseWrapper.java:384)
at
info.magnolia.module.cache.filter.CacheResponseWrapper.replay(CacheResponseWrapper.java:344)
at
info.magnolia.module.cache.filter.GZipFilter.doFilter(GZipFilter.java:97)
at
info.magnolia.cms.filters.OncePerRequestAbstractMgnlFilter.doFilter(OncePerRequestAbstractMgnlFilter.java:59)
at
info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:79)
at
info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:81)
at
info.magnolia.cms.security.auth.login.LoginFilter.doFilter(LoginFilter.java:127)
at
info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:85)
at
info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:79)
at
info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:81)
at
info.magnolia.cms.filters.CosMultipartRequestFilter.doFilter(CosMultipartRequestFilter.java:87)
at
info.magnolia.cms.filters.OncePerRequestAbstractMgnlFilter.doFilter(OncePerRequestAbstractMgnlFilter.java:59)
at
info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:79)
at
info.magnolia.cms.filters.ContentTypeFilter.doFilter(ContentTypeFilter.java:112)
at
info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:85)
at
info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:79)
at
info.magnolia.cms.filters.ContextFilter.doFilter(ContextFilter.java:128)
at
info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:85)
at
info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:79)
at
info.magnolia.cms.filters.CompositeFilter.doFilter(CompositeFilter.java:65)
at
info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:85)
at
info.magnolia.cms.filters.SafeDestroyMgnlFilterWrapper.doFilter(SafeDestroyMgnlFilterWrapper.java:107)
at
info.magnolia.cms.filters.MgnlFilterDispatcher.doDispatch(MgnlFilterDispatcher.java:67)
at
info.magnolia.cms.filters.MgnlMainFilter.doFilter(MgnlMainFilter.java:108)
at
info.magnolia.cms.filters.MgnlMainFilter.doFilter(MgnlMainFilter.java:94)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)[/code]
Kindly help on how to resolve this error.
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