web application

How can i create fast and easily a web application using java (and MVC)

Using Servlets directly in an application server is not flexible enough and too much code and too complex for simple tasks like providing a webservice interface (REST/SOAP) The solution should contain everything needed to create a new project and describe the concepts of the used tools/frameworks.

Command-line access to REST endpoints

There is a web application that offers and interface via REST-endpoints for remote access and control. I have a Linux box as my main central tool, and I am used to the "command line" way of working. How would I access the web-acpplication using command line?

How to get a consistent website design using Bootstrap

If your are new to CSS and HTML designing your website can be a hard and time consuming activity. To create a site that is easy to use and also looks nice you can spend hour on styling your different object and components.

Using the NetTool to debug and test network applictions

NetTool is a developer tool for monitoring and manipulating application-level network messages, particularly useful for debugging web applications and web services. There are two components to NetTool: the HTTP Client, and the TCP Tunnel.
Further information can be found using the following link: http://nettool.sourceforge.net

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Deploying a Haskell web application to the Cloud

We want to expose our logic that is programmed in the functional programming Haskell as a web service and need to deploy it as a public web service. For this we want to use a PaaS (Platform-as-a-Service) vendor, i.e., 'Cloud hoster', in order to publish this web service with minimal configuration.

How do I implement a custom "paging" script for a variable number of items?

A very common problem in web programming is to implement paging. Paging is required whenever there is an undefined amount of items (usually queried from a database) with a maximum amount of items to be displayed on one page. If there is more than one page, there must be a possibility to navigate through these pages while each page displays the desired amount of items. An example will demonstrate the problem: State: - You have a category containing 23 products to be displayed in the category overview of your webshop - A single page should display a maximum of 8 pages for design and usability reasons Now we have to calculate the number of pages, the number of products to display per page and display everything to the user. This case will result in 3 pages: Page 1 will display the items 1-8, Page 2 will display the pages 9-16 and Page 3 will display the items 17-23. Please show a general algorithm for this problem.

How to implement a secure session management system in PHP (and generally)?

Developers, especially unexperienced PHP developers, have a tendency to not care much care about security-related issues. This is true for the problem of secure sessions, too - and the reason why attackers of a certain website or service can easily hijack sessions to get access to data, which they should not have access to. Because HTTP is a stateless protocol, sessions are required to identify a certain client on multiple requests. In PHP this identification is done via "session IDs", which are exchanged by the client and the webserver on each request (the session ID may be stored as a Cookie, in the URL or hidden field). The server stores the session ID locally to identify a certain client if the session ID is available in a certain request. If an attacker is able to steal the session ID of a certain client, the server will "think", that the attacker is the client. As a result, the attacker will be able to do everything, the client is allowed to do. How do I implement a session management system in PHP (and generally), which is more secure and more protected against "session hijacking" attempts?

Creating a web audio player with GWT

Google Web Toolkit (GWT) is a set of tools that allows for creating JavaScript applications in Java. For a web application I was working on with GWT, I had to create an audiovisualization unit. For that purpose it was necessary to implement an audio player that would play/pause/resume/stop a sound file by request.

Secure Web-Application

Within the framework of the procurement of Web application substantial security holes were evident (recognized by by examinations/ (IT-Securtiy checks). The Web applications are ordered by the company at different suppliers, who carry out the software development. In the course of the agency, however, there is no further specification concerning the requirement to IT-regarding to an implicit approach „it just must be safe “. These facts cause the following problems: + The level of IT-Security is not defined and depends on the provider + The frame of vunerabilities found by security-checks cannot be regarded as lacks, no specification is available. + The repair of vunerabilties depends on the goodwill of the providers + If clients-data are run at this Website, the data protection is not guaranteed.

Reading webpages in Java applications

Many web application fall into the category of "mash ups", meaning that they collect information from different sources (often other web applications) and combine it in a single, coherent user interface that offers additional value to the user. Often this additional value is enough to justify the mash up as a service of its own. In order write such an application, one must first be able to access the web pages in question in the Java code of the own application.

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