Example usage for org.apache.wicket.request.resource SharedResourceReference getKey

Introduction

In this page you can find the example usage for org.apache.wicket.request.resource SharedResourceReference getKey.

Prototype

public final Key getKey() 

Source Link

Usage

From source file:org.opensingular.form.wicket.mapper.attachment.DownloadSupportedBehavior.java

License:Apache License

/**
 * Registra um recurso compartilhado do wicket para permitir o download
 * sem bloquear a fila de ajax do wicket.
 * O recurso compartilhado  removido to logo o download  executado
 * Esse procedimento visa garantir que somente quem tem acesso  pgina pode fazer
 * download dos arquivos./*from   w w  w  .  j a  v a 2s. c o  m*/
 *
 * @param filename
 * @return
 */
private String getDownloadURL(String id, String filename) {
    String url = DOWNLOAD_PATH + "/" + id + "/" + new Date().getTime();
    SharedResourceReference ref = new SharedResourceReference(String.valueOf(id));
    AbstractResource resource = new AbstractResource() {
        @Override
        protected ResourceResponse newResourceResponse(Attributes attributes) {
            IAttachmentRef fileRef = findAttachmentRef(id);
            if (fileRef == null) {
                return new ResourceResponse().setStatusCode(HttpServletResponse.SC_NOT_FOUND);
            }
            ResourceResponse resourceResponse = new ResourceResponse();
            if (fileRef.getSize() > 0) {
                resourceResponse.setContentLength(fileRef.getSize());
            }
            resourceResponse.setFileName(filename);
            try {
                resourceResponse.setContentDisposition(contentDisposition);
                resourceResponse.setContentType(fileRef.getContentType());
                resourceResponse.setWriteCallback(new WriteCallback() {
                    @Override
                    public void writeData(Attributes attributes) throws IOException {
                        try (InputStream inputStream = fileRef.getContentAsInputStream()) {
                            IOUtils.copy(inputStream, attributes.getResponse().getOutputStream());
                            /*Desregistrando recurso compartilhado*/
                            WebApplication.get().unmount(url);
                            WebApplication.get().getSharedResources().remove(ref.getKey());
                        } catch (Exception e) {
                            getLogger().error("Erro ao recuperar arquivo.", e);
                            ((WebResponse) attributes.getResponse())
                                    .setStatus(HttpServletResponse.SC_NOT_FOUND);
                            resourceResponse.setStatusCode(HttpServletResponse.SC_NOT_FOUND);
                        }
                    }
                });
            } catch (Exception e) {
                getLogger().error("Erro ao recuperar arquivo.", e);
                resourceResponse.setStatusCode(HttpServletResponse.SC_NOT_FOUND);
            }
            return resourceResponse;
        }
    };
    /*registrando recurso compartilhado*/
    WebApplication.get().getSharedResources().add(String.valueOf(id), resource);
    WebApplication.get().mountResource(url, ref);
    String path = WebApplication.get().getServletContext().getContextPath() + "/"
            + WebApplication.get().getWicketFilter().getFilterPath() + url;
    path = path.replaceAll("\\*", "").replaceAll("//", "/");
    return path;
}

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