Add a input file with JSF 1.2

I need to upload in a form dedicated to upload files. In my project I can use JSF 1.2 and RichFaces 3.3.3 but I can't use the <rich:fileUpload/> because my client wants a simple input, just like <input type="file"/>.

If I could I would use Primeface's or Tomahawk's file upload, but I'm forbidden, I can't use other libraries, I also can't use Servlet 3.0 nether Apache fileupload. What can I do now? I've seen other similar questions, but they could use other libs, I just can't, I'm restricted...

Solution

To solve this issue with an acceptable solution I created a normal form and a servlet, the servlet receives the multipart/form-data request and uses the org.ajax4jsf.request.MultipartRequest included in RichFaces 3.3.3 to parse the received parameters and the attached file, then I save the File instance in a session and I restore it inside the JSF context.

xhtml:

<a4j:form >
    <a4j:jsFunction name="finishUpload" 
            action="#{importacaoController.actionUploadArquivoDadosXX}"
            reRender="uploadedFile,globalMensagens" />
    <a4j:jsFunction
        name="tipoNaoSuportado" reRender="globalMensagens" action="#{importacaoController.actionTipoNaoSuportado }"
        />
</a4j:form>
<form target="uploader" id="uploaderForm" action="#{request.contextPath}/MyServlet"
    method="post" enctype="multipart/form-data" style="position: absolute;margin: -210px 0 0 300px;">
    <div class="modulo-6-12">
        <label for="uploadFileField">Anexar arquivo</label><br/>
        <input type="file" id="uploadFileField" name="upload" onchange="jQuery('#uploaderForm').submit();" />
    <br />
    <small><h:outputText id="uploadedFile" value="#{importacaoController.arquivoConfig.name}" /></small>
    </div>
</form>
<iframe id="uploader" width="0" height="0" src="" style="display: none; border: 0; margin:0;padding:0;"></iframe>

Servlet:

public class MyServlet extends HttpServlet {

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String encoding = request.getCharacterEncoding();
        if(encoding == null) request.setCharacterEncoding("UTF-8");
        MultipartRequest mpRequest = new MultipartRequest(request,true,10*1024*1024,"importarXX");
        String field = "upload";
        Object o =mpRequest.getFile(field);
        if(o instanceof File)
        {
            File file = (File)o;
            HttpSession sess = request.getSession();
            String name = mpRequest.getFileName(field);

            Writer w = response.getWriter();
            w.write("<html><head><script>");
            if(!name.endsWith(".xls"))
            {

                w.write("parent.window.tipoNaoSuportado()" +
                        //"alert('Só são permitidos arquivos com extensão .xls');" +
                        "</script></head><body></body></html>");
                w.close();
                file.delete();
                return;
            }

            sess.setAttribute("importarXXFile", o);
            sess.setAttribute("importarXXFileName", name);
            w.write("parent.window.finishUpload();</script></head><body>Sucesso</body></html>");
            w.close();
        }
    }
}

Controller:

public boolean actionUploadArquivoDadosXX(){
    flgTipoNaoSuportado = false;
    HttpSession sess = ((HttpServletRequest) FacesContext.getCurrentInstance().getExternalContext().getRequest()).getSession();
    File uploadedFile = (File) sess.getAttribute("importarXXFile");
    String uploadedFileName = (String) sess.getAttribute("importarXXFileName");
    boolean ret = false;

    if(uploadedFile != null && uploadedFileName != null){
        BeanArquivoUpload arquivo = new BeanArquivoUpload();
        arquivo.setFile(uploadedFile);
        arquivo.setName(uploadedFileName);
        arquivo.setFileSize(uploadedFile.length());
        setArquivoConfig(arquivo);
        ret = true;
    }
    else
    {
         setArquivoConfig(null);
    }

    sess.removeAttribute("importarXXFile");
    sess.removeAttribute("importarXXFileName");

    return ret;


}