Download the ADF works for a time the frist

I have a ADF table to JSF page which is bounded to the View Object which contains the files downloaded to the user. This View Object contains all the information needed to download a file like blob domain , file type and file name . For each line, there is a download button that allows the user to download the selected file.

All work of things perfectly for the first time. Problem is when the download user press some file it already download it, the file get damaged. The file appears in the download section for the browser, but when I tried to open it it says the file cannot be opened because the file format or file extension is not supported.

I use Jdeveloper with ADF technology 11.1.2.3

This is the button in the JSF page:

<af:column id="c31">
<af:commandButton text="Download" id="cb12" partialSubmit="true">
   <af:fileDownloadActionListener method="#{ITDetalisBean.downloadSelectedFile}"
  filename="#{row.FileName}" contentType="#{row.FileType}"/>
</af:commandButton>
</af:column>

As you can see the button is placed in <af:column> tag. So for each row file it is matching the download button.

Here is the Bean method:

  public void downloadSelectedFile(FacesContext facesContext, OutputStream outputStream) 
{
   // get the view object from the application module
   AppModuleImpl appM = (AppModuleImpl)(JSFUtils.getApplicationModule("AppModuleDataControl"));
   ViewObject fileUploadedVO = appM.findViewObject("UplodedFilesViewTransient1");

   // get the file content as blob domain from the current row
   BlobDomain blobDomain=(BlobDomain)fileUploadedVO.getCurrentRow().getAttribute("FileContn");


   // download the file using output stream
   try {
   HttpServletResponse response =
   (HttpServletResponse)FacesContext.getCurrentInstance().getExternalContext().getResponse();

   InputStream in = blobDomain.getBinaryStream();
  outputStream = response.getOutputStream();

   byte[] buf = new byte[1024];
   int count;
   while ((count = in.read(buf)) >= 0) {
  outputStream.write(buf, 0, count);
   }

  in.close();
  outputStream.flush();
  outputStream.close();
  facesContext.responseComplete();


   } catch (IOException ex) {
   System.out.println(ex.getMessage());
  ex.printStackTrace();
   } catch (Exception e) {
   System.out.println(e.getMessage());
  e.printStackTrace();
   }
}

In the end, try to call

blobDomain.closeInputStream)

blobDomain.closePutputStream)

Tags: Java

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