[OmniFaces utilities (2.0)] Get the input stream for an application resource mapped to the specified path

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[OmniFaces utilities] The getResourceAsStream() method returns an input stream for an application resource mapped to the specified path, if it exists; otherwise, return null.

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Method:

See also: Faces#getContext()

Usage:

For example, when you download a file, you can use Faces#getResourceAsStream(), as below:

public void readFileAction() throws IOException, URISyntaxException {

  FacesContext facesContext = FacesContext.getCurrentInstance();

  ExternalContext externalContext = facesContext.getExternalContext();

  Path path = Paths.get(externalContext.getRealPath("/resources/rafa.txt"));

  BasicFileAttributes attrs = Files.readAttributes(path, BasicFileAttributes.class);

  externalContext.responseReset();

  externalContext.setResponseContentType("text/plain");

  externalContext.setResponseContentLength((int) attrs.size());

  externalContext.setResponseHeader("Content-Disposition", "attachment; filename=\"" + "rafa.txt" + "\"");

 

  int nRead;

  byte[] data = new byte[128];

  InputStream inStream = Faces.getResourceAsStream("/resources/rafa.txt");

  try (OutputStream output = externalContext.getResponseOutputStream()) {

       while ((nRead = inStream.read(data, 0, data.length)) != -1) {

               output.write(data, 0, nRead);

       }

       output.flush();

  }

  facesContext.responseComplete();

}

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