Accessing the ACE IMS via python

Using hashlib, and binascii we can use python to both generate a digest and grab an ace token for that digest.

While this example only sends one request in a call, you should batch your requests prior to requesting a token. Just send a ‘list’ of tokenRequest objects to requestTokensImmediate. The IMS will support up to 10,000 requests per call.

import hashlib
import binascii
from suds.client import Client

filename='test2.py'

digFile = open(filename,'rb')
hashAlg = hashlib.sha256()
hashAlg.update(digFile.read())
filedigest = binascii.b2a_hex(hashAlg.digest())

url='http://ims.umiacs.umd.edu:8080/ace-ims/IMSWebService?wsdl'
client = Client(url)

print  filename, ' ', filedigest

request = client.factory.create('tokenRequest')
request.hashValue = filedigest
request.name = filename

result = client.service.requestTokensImmediate('SHA-256-0',request)
print result

The result spits back a token that you can use to validate a file.

[python] [toaster@loach ace-cli]$ python test2.py
test2.py   164182eef9792e2e1c5005cd9240ff508aef042b8fa344597431eae39370c784
[(tokenResponse){
  digestService = "SHA-256"
  name = "test2.py"
  proofElements[] =
     (proofElement){
        hashes[] =
           "c5e82872eeee3dfa539202a9757f8a5364b6fded4dfcb40b66084158f2b5c627",
        index = 0
     },
     (proofElement){
        hashes[] =
           "6e16a71847403f4e586625463160993bfab189c0bba771d81354c03d9c3591fd",
        index = 0
     },
     (proofElement){
        hashes[] =
           "0879b385c366d07142446a18dfb6d19c468a733991e9685fc75ce6f4b929b659",
        index = 0
     },
     (proofElement){
        hashes[] =
           "e19dd18bd9eabf79a074d72231a7117bd2319a859d31a429575b4657e85d0c95",
        index = 1
     },
  roundId = 2893078
  statusCode = 100
  timestamp = 2011-01-07 13:08:27.000253
  tokenClassName = "SHA-256-0"
}]

Simple Effect

Pivot nicely provides a few nice effects for items. This is useful for images, etc but if you want to make a simple text-based header it needs the tiniest bit of tweaking.

What we need is to translate the reflection so it overlaps the text a little.

We can just modify the Reflection effect and two properties for x & y reflection translation and tweak where the reflection is drawn. Here’s the modified ConfigurableReflection class

public class ConfigurableReflection extends ReflectionDecorator {

    private Component component = null;
    private Graphics2D graphics = null;
    private BufferedImage componentImage = null;
    private Graphics2D componentImageGraphics = null;

    private int yTranslate = 0;
    private int xTranslate = 0;

    public void setXTranslate(int xTranslate) {
        this.xTranslate = xTranslate;
    }

    public void setYTranslate(int yTranslate) {
        this.yTranslate = yTranslate;
    }

    public int getXTranslate() {
        return xTranslate;
    }

    public int getYTranslate() {
        return yTranslate;
    }

    

    @Override
    public Graphics2D prepare(Component component, Graphics2D graphics) {
        this.component = component;
        this.graphics = graphics;

        int width = component.getWidth();
        int height = component.getHeight();

        componentImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
        componentImageGraphics = componentImage.createGraphics();

        // Clear the image background
        componentImageGraphics.setComposite(AlphaComposite.Clear);
        componentImageGraphics.fillRect(0, 0, componentImage.getWidth(), componentImage.getHeight());

        componentImageGraphics.setComposite(AlphaComposite.SrcOver);

        return componentImageGraphics;
    }

    @Override
    public void update() {
        // Draw the component
        graphics.drawImage(componentImage, 0, 0, null);

        // Draw the reflection
        int width = componentImage.getWidth();
        int height = componentImage.getHeight();

        GradientPaint mask = new GradientPaint(0, height / 4f, new Color(1.0f, 1.0f, 1.0f, 0.0f),
                0, height, new Color(1.0f, 1.0f, 1.0f, 0.5f));
        componentImageGraphics.setPaint(mask);

        componentImageGraphics.setComposite(AlphaComposite.DstIn);
        componentImageGraphics.fillRect(0, 0, width, height);

        componentImageGraphics.dispose();
        componentImageGraphics = null;

        componentImage.flush();

        graphics.transform(getTransform(component));

        graphics.drawImage(componentImage, 0, 0, null);

        componentImage = null;
        component = null;
        graphics = null;
    }

    @Override
    public Bounds getBounds(Component component) {
        // MODIFICATION for new translation
        return new Bounds(0, 0, component.getWidth() + xTranslate, component.getHeight() * 2 + yTranslate);
    }

    @Override
    public AffineTransform getTransform(Component component) {
        AffineTransform transform = AffineTransform.getScaleInstance(1.0, -1.0);
        // MODIFICATION for new translation
        transform.translate(xTranslate, -((component.getHeight() * 2) + yTranslate));

        return transform;
    }
}

Simple netbeans Pivot module

I got a little tired re-running my entire app just to see what the current pivot layout would look like, so here’s a quick and dirty plugin for Netbeans 6.8 which does the following:

  • Pivot 1.5.1 library
  • XML-editing and formatting for .wtkx files
  • right-click, ‘Preview WTKX’ function

download

To use this module on a pivot project, Right-click on project, select properties and add the new Pivot 1.5.1 library to your project. When viewing a file, you first need to build your project then right click on the .wtkx files to preview.