large size file with <s:resource> and <s:download>, 403 error

[lit0908]

Hi,

     What I am trying to do is a file download page. It works fine for small size file(probably less than 100MB), but when I try to download a large size file, it give me a page with "HTTP Status 403 - Access to the requested resource has been denied"。

     Don't know why is this happening and really new to this area. I have searched the forum, but nothing helped.

     Here is my code.

     web.xml

   <!-- Document Store Servlet -->
   <servlet>
            <servlet-name>Document Store Servlet</servlet-name>
            <servlet-class>org.jboss.seam.document.DocumentStoreServlet</servlet-class>
   </servlet>
   
   <servlet-mapping>
               <servlet-name>Document Store Servlet</servlet-name>
               <url-pattern>/seam/docstore/*</url-pattern>
   </servlet-mapping>

     fileDownloadTest.xhtml

<rich:panel>
                  <f:facet name="header">Files Uploaded</f:facet>
                  
                  <div class="results">
                      <h:outputText value="No files exists" rendered="#{empty attachmentList}"/>
                      <rich:dataTable id="attachmentList" 
                                                     var="entry"
                                           value="#{attachmentList}" 
                                                  rendered="#{not empty attachmentList}">
                          <rich:column>
                              <f:facet name="header">File Name</f:facet>
                              <s:link value="#{entry.name}"/>
                          </rich:column>
                          <rich:column>
                              <f:facet name="header">Content Type</f:facet>
                              #{entry.type}
                          </rich:column>
                          <rich:column>
                              <f:facet name="header">Size(bytes)</f:facet>
                              #{entry.size}
                          </rich:column>
                          <rich:column>
                              <f:facet name="header">Action</f:facet>
                              <s:download src="/resources.xhtml">
                                        Download
                                        <f:param name="attachmentId" value="#{entry.id}"></f:param>
                              </s:download>
                          </rich:column>
                      </rich:dataTable>
                  </div>
              </rich:panel>

     resources.xhtml

<s:resource xmlns="http://www.w3.org/1999/xhtml"


    xmlns:s="http://jboss.com/products/seam/taglib"


    data="#{attachmentDownloadManager.file}"


    contentType="#{attachmentDownloadManager.contentType}"


    fileName="#{attachmentDownloadManager.fileName}" />

     resources.page.xml

<page xmlns="http://jboss.com/products/seam/pages"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://jboss.com/products/seam/pages http://jboss.com/products/seam/pages-2.2.xsd"
      action="#{attachmentDownloadManager.prepareDoc()}">
</page>

     AttachmentDownloadManagerAction.java

@Stateful
@Name("attachmentDownloadManager")
@Scope(ScopeType.EVENT)
public class AttachmentDownloadManagerAction implements AttachmentDownloadManager{


          @Logger
          private Log log;
  
          @PersistenceContext(type = PersistenceContextType.EXTENDED)
          private EntityManager em;
  
          @RequestParameter
          private Long attachmentId;
  
          private File file;
          private String fileName;
          private String contentType;
  
  
          @Factory("attachmentList")
          public List<Attachment> getAttachmentList(){
                    List<Attachment> list = new ArrayList<Attachment>();
                    list = em.createQuery("select a from Attachment a").getResultList();
                    return list;
          }
  
          public void prepareDoc(){
                    log.info("prepareDoc() Id-" + attachmentId);
                    Attachment attachment = em.find(Attachment.class, attachmentId);
                    this.fileName = attachment.getName();
                    this.contentType = attachment.getType();
                    file = new File(attachment.getLocation() + attachment.getName());
  
                    log.info("prepareDoc() File ready");
          }
  
          public File getFile() {return file;}
          public void setFile(File file) {this.file = file;}
  
          public String getFileName() {return fileName;}
          public void setFileName(String fileName) {this.fileName = fileName;}
  
          public String getContentType() {return contentType;}
          public void setContentType(String contentType) {this.contentType = contentType;}
  
          @Remove
          public void destroy(){
  
          }
}

Thanks for your time and help in advance.