If I do that, i ge the following error;


Internal Server Error

Message: null

Description: java.lang.NullPointerException

Sender: org.apache.cocoon.servlet.CocoonServlet

Source: Cocoon Servlet

Request URI

download/test.pdf

cause

java.lang.NullPointerException

request-uri

/cocoontest/download/test.pdf

stacktrace

java.lang.NullPointerException
                at org.apache.catalina.connector.ResponseBase.setContentType(ResponseBase.java:874)
                at org.apache.catalina.connector.HttpResponseBase.setContentType(HttpResponseBase.java:853)
                at org.apache.catalina.connector.ResponseFacade.setContentType(ResponseFacade.java:197)
                at org.apache.cocoon.environment.http.HttpResponse.setContentType(HttpResponse.java:214)
                at org.apache.cocoon.environment.http.HttpEnvironment.setContentType(HttpEnvironment.java:216)
                at org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.setupReader(AbstractProcessingPipeline.java:583)
                at org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.preparePipeline(AbstractProcessingPipeline.java:515)
                at org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.process(AbstractProcessingPipeline.java:479)
                at org.apache.cocoon.components.treeprocessor.sitemap.ReadNode.invoke(ReadNode.java:119)
                at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:84)
                at org.apache.cocoon.components.treeprocessor.sitemap.ActTypeNode.invoke(ActTypeNode.java:176)
                at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:84)
                at org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invoke(PreparableMatchNode.java:165)
                at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:108)
                at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:163)
                at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:108)
                at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:152)
                at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:354)
                at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:307)
                at org.apache.cocoon.Cocoon.process(Cocoon.java:656)
                at org.apache.cocoon.servlet.CocoonServlet.service(CocoonServlet.java:1112)
                at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
                at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
                at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
                at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
                at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
                at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
                at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
                at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
                at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
                at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
                at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
                at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
                at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
                at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
                at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
                at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
                at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
                at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
                at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:509)
                at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
                at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
                at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
                at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
                at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
                at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
                at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
                at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1040)
                at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1151)
                at java.lang.Thread.run(Thread.java:534)

Apache Cocoon 2.1.4-dev




> >2de question; I want the user to download the file, that
> when teh user
> >cliks the link, his browser opens a download dialog box so heb can
> >choose where to save the file.
> >
> >how do I do that?
>
> To a large extent, that depends on the browser they're using
> - for example, I have mine set to automatically download
> files to a specific folder without prompting.
>
> More generally, though, if the browser has a plugin that can
> handle the returned mime type it will open it in that;
> otherwise it will download it.  
> There may also be a separate "download this link" option on
> the RMB popup menu to allow it to be saved rather than opened.
> If you want to force files to be downloaded rather than
> handled by plugins, you could return application/octet-stream
> as the mime type instead of the actual value.

I use the following strategy, which should work for most browsers I
believe:

                <map:match pattern="download/*">
       <map:act type="set-header">
         <map:parameter name="Content-Type"
value="application/x-download"/>
         <map:parameter name="Content-Disposition" value="attachment ;
filename={1}"/>

         <map:read src="" />
       </map:act>
                </map:match>

PS: {global:datadir} refers to a datadir element in
map:pipelines/map:component-configurations/global-variables

Kind regards,
Geert
 

Drs. G.P.H. Josten
Consultant



Daidalos BV
Source of Innovation
Hoekeindsehof 1-4
2665  JZ  Bleiswijk
Tel.: +31 (0) 10 850 1200
Fax: +31 (0) 10 850 1199
www.daidalos.nl
KvK 27164984


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