ASP.NET PDF Viewer using C#, VB/NET

The LSP makes clear that in [object design] the ISA relationship pertains to behavior Well, it seems to me that what went wrong was that we got mired in the world of objects To say it one more time: The inheritance model that Hugh Darwen and I propose (a) does not involve objects and (b) does understand that a square is a rectangle (and a circle is an ellipse) And we would really like to suggest, with all due respect, that the industry leaders in this field, instead of spending so much time and effort in trying to persuade the rest of us that squares aren t rectangles and circles aren t ellipses, would take a look at our model and see how we do it.

ssrs code 128, ssrs code 39, ssrs fixed data matrix, winforms pdf 417 reader, winforms qr code reader, winforms upc-a reader, c# remove text from pdf, itextsharp replace text in pdf c#, winforms ean 13 reader, itextsharp remove text from pdf c#,

<script type="text/javascript"> function submitInfo(name) { document.write(name);

After your first export completes, a dialog box pops up, asking you to consider making a one-time financial donation to the Ardour project or to become a regular subscriber (see Figure 9-48). This is optional and doesn t affect the operation of the program. If you do decide to donate and click the appropriate option, a web browser opens at the donation page of the http://ardour.org web site. It s an innovative way to approach the funding of a major Free Software project.

Anyway, I more or less stopped reading Martin s paper at this point except for the following small point, which I noticed on the next page: [When] redefining a routine [in a derivative], you may only replace its precondition by a weaker one, and its postcondition by a stronger one Actually, Martin says this is a quote from Bertrand Meyer s book Object Oriented Software Construction (Prentice Hall, 1988); the text in brackets is thus Tockey s editing of Meyer s original, not editing by me Anyway, the overall quote looks like something Tockey said in his article too (perhaps Tockey got it from here); in effect, therefore, I ve already dealt with it, at least to some extent, but as I promised earlier I ll come back and take a closer look at it later in this chapter..

Figure 11-8. Application with a text box and a submit button to call a JavaScript function After the user submits the form, the name displays on the web page as intended. However, take a look in Figure 11-9 at what happens if the user inserts the following code instead of a name:

It was with a certain sense of relief and anticipation that I turned to the original Liskov/Wing paper, A Behavioral Notion of Subtyping. Surely here, I thought, I would find much greater precision and clarity of thinking and expression. Nor was I disappointed. Indeed, the paper

As you can see, we inserted JavaScript code, which was passed to the HTML page and executed by the browser. Displaying an alert box is pretty harmless, but having the ability to add the script tag lets the attacker inject a script, such as:

Figure 9-48. Ardour s first export triggers a dialog box asking for an optional financial donation. In the next chapter, you look at ways of making your Ardour project sound even better and how to use the graphics skills you ve acquired in earlier chapters to make your CD look good too.

Web applications are applications built on the technology that powers the Web. The HTTP protocol and the associated programming paradigm are a prominent part of this technology set. In Java, the raw lowlevel HTTP and related infrastructure is abstracted out as a higher-level API and managed components. At the heart of this abstraction is the Servlet specification, which wraps HTTP methods and HTTP protocol handling in objects. Web applications written in Java are packaged with all assets, associated libraries, class files, and any other resources into a special archive file format: a web application archive (WAR). These WAR files are deployed on a servlet container or an application server (which contains a servlet container). Most data services, especially LCDS and BlazeDS, are web applications and exist as WAR files. The remoting gateway is a servlet, and data service elements are web components. A little later, in the section

was so clear that its errors were clear, too! Indeed, I found there were so many comments I wanted to make on that paper that I decided to devote the entire remainder of this chapter (except for the final section, Substitutability Defined ) to the Liskov/Wing paper specifically.

Downloading and deploying the web application, you will see how deploying LCDS or BlazeDS is identical to deploying any other web application distributed in a WAR file format. In both BlazeDS and LCDS, the primary communication responsibilities are handled by a message broker, which is created on startup by a servlet called the MessageBrokerServlet. The application server s standard class loader loads it like any other servlet. This message broker is extremely flexible, and all types of available services and endpoints can be configured for it fairly easily. All such configurations reside in an XML configuration file, which I talk about later in the section Configuring data services.