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  1. WebApp Framework Access Restriction

    The WebApp Framework comes with a prepared system for building proper secure Web Applications. By default there is the session manager that generates a unique key for each session and remembers the login state of this session and there are several hooks that allow the developer to easily implement access rules on view level. Now having this all in place it is just a matter of implementing the right hooks to restrict access to parts of the application based on the login state and user rights. But ...
  2. Configuring HTTP Compression for DataFlex WebApps

    A standard feature of the Internet Information Server is HTTP compression. This module is available to optimize the performance of web applications by compressing HTTP responses that are sent to the client. The goal is to decrease the size of the responses to allow faster network transmission. Of course this has the side effect that the CPU usage increases on the server (and on the client). So we are trading CPU usage against bandwidth here. This means that HTTP compression doesn't always make your ...

    Updated 17-Feb-2014 at 04:26 AM by Harm Wibier

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  3. How to Use SOAP Headers to Limit the Lifespan of a WebService Call

    In this blog I will show you how you can limit the amount of time that an application can call a webservice function. It is a small contribution to security and helps you against unwanted webservice calls.

    SOAP Headers
    A SOAP based WebService call always contains a body section and optionally can contain a header section. The use of a SOAP header section on both the Visual DataFlex server as well as client side is good documented in the help provided with the product. The good ...

    Updated 31-Dec-2011 at 07:59 AM by Vincent Oorsprong (Made a link to the conversions library)

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  4. How to Add a Chart to Your Visual DataFlex Web Application?

    What do you need to do when you want to enrich your web application with some charts? First of all it is important to find data that let itself nicely present in a chart but you probably have that else you won't be interested in reading this blog. Then you need to decide what kind of chart you would like to use. Do you want a pie, a bar or a line graph? Dealt with this it is time to find a good API, a good tool that you can use. There are many solutions available on the web. For this blog I used ...

    Updated 2-Dec-2013 at 02:28 AM by Vincent Oorsprong (Images enlarged)

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