Question

I’m trying here to add a specific dialog bean for action on Alfresco Explorer that supposed to download a specific docx file. The code is working fine when I hit the download action, it downloads the file but as mentioned in my question title, the file size is 0 bytes.

I’m using this to do that:

public class NewFormDialog extends BaseDialogBean {

protected String aspect;

protected String finishImpl(FacesContext context, String outcome)
        throws Exception {

    download(aspect);

    // // get the space the action will apply to
    // NodeRef nodeRef = this.browseBean.getActionSpace().getNodeRef();
    //
    // // resolve the fully qualified aspect name
    // QName aspectToAdd = Repository.resolveToQName(this.aspect);
    //
    // // add the aspect to the space
    // getNodeService().addAspect(nodeRef, aspectToAdd, null);
    //
    // // return the default outcome
    return outcome;
}

public boolean getFinishButtonDisabled() {
    return false;
}

public String getFinishButtonLabel() {
    return "Download";
}

public void download(String pAspect) throws ServletException, IOException {

    String filename = pAspect;
    String filepath = "\\";
    BufferedInputStream buf = null;
    ServletOutputStream myOut = null;

    try {
        FacesContext fc = FacesContext.getCurrentInstance();
        HttpServletResponse response = (HttpServletResponse) fc
                .getExternalContext().getResponse();

        myOut = response.getOutputStream();
        File myfile = new File(filepath + filename);

        // set response headers
        response.setContentType("application/octet-stream");

        response.addHeader("Content-Disposition", "attachment; filename="
                + filename);

        response.setContentLength((int) myfile.length());

        FileInputStream input = new FileInputStream(myfile);
        buf = new BufferedInputStream(input);
        int readBytes = 0;

        // read from the file; write to the ServletOutputStream
        while ((readBytes = buf.read()) != -1)
            myOut.write(readBytes);
        myOut.flush();
        response.flushBuffer();

    } catch (IOException ioe) {

        throw new ServletException(ioe.getMessage());

    } finally {
        // close the input/output streams
        if (myOut != null)
            myOut.close();
        if (buf != null)
            buf.close();
        FacesContext.getCurrentInstance().responseComplete();
    }
}

public String getAspect() {
    return aspect;
}

public void setAspect(String aspect) {
    this.aspect = aspect;
}
}

I tried every solution that I found by none works.

Thank you in advance.

Answer 1

The File.length() method returns 0 if the file does not exist. Check to make sure that the file exists.

Tip: The Apache Commons IO library simplifies many I/O related tasks. For example, the following code snippet streams the contents of a file to the servlet response:

HttpServletResponse response = ...
File myfile = ...
InputStream in = null;
OutputStream out = null;
try {
  in = new FileInputStream(myfile);
  out = response.getOutputStream();
  IOUtils.copy(in, out);
} finally {
  IOUtils.closeQuietly(in); //checks for null
  IOUtils.closeQuietly(out); //checks for null
}