ExtJS处理响应将PDF保存为StreamingOutput

Question

我正在使用extJS 4.2.1，我希望显示一个存储在ResponseBuilder中的PDF文件作为StreamingOutput对象。当响应返回到extjs控制器时，我不知道如何处理它以便在新页面上显示PDF。

@GET
@Path("/images/{imageNumber}/{imageType}")
@Produces({"application/pdf"})
public Response openDocument(@PathParam("company") String company, 
@PathParam("imageNumber") String imageNumber, @PathParam("imageType") String imageType){

final File imageFile = new File("/someRemoteDir/28717484.pdf");
StreamingOutput stream = new StreamingOutput() {

public void write(OutputStream output) throws IOException, WebApplicationException {
try {
  InputStream input = new FileInputStream(imageFile);
  byte[] buf = new byte[8192];
  int c = 0;
  while ((c = input.read(buf, 0, buf.length)) > 0) {
                    output.write(buf, 0, c);
                    output.flush();
  }
  output.close();
  input.close();
  } catch (IOException e) {
  e.printStackTrace();
  }
 }
};

ResponseBuilder response = Response.ok(stream);
response.type("application/pdf");
response.status(200);
response.header("Accept-Ranges","bytes");
response.header("Cache-Control",null);
response.header("Pragma",null);
response.header("Content-Disposition","inline; filename=\"" + imageDoc.getNumber() +"\"");
return response.build();
}

extJS控制器

Ext.Ajax.request({
  method: 'GET',
  url: CTrack.Config.appPath('loads/images/' + imageNumber + '/' + imageType),
  jsonSubmit: true,
  success: function(response, opt) {
    if (response.status == 200) {
       NOT SURE WHAT TO DO HERE?.........
    } else {
        me.displayError(errorMsg);
    } },
  failure: function(response, opt) { 
    console.log('Failure');
  }

...