dhtmlxGrid is a JavaScript grid control that you can use to create an AJAX interface to a relational database server. The grid view provided by dhtmlxGrid offers actions that one would expect from a desktop grid control, such as sorting by columns by clicking on them, resizing columns, rich cell rendering, keyboard navigation, themes, and drag and drop.
Network administrators frequently use the Lightweight Directory Access Protocol (LDAP) to implement a centralized directory server. You can use LDAP to authenticate users in Apache. Two popular open source LDAP solutions are OpenLDAP and Red Hat Directory Server. According to the Apache documentation, Novell LDAP and iPlanet Directory Server are also supported. This article focuses on OpenLDAP, but the concepts and examples should be applicable to the others.
Ever thought about how nice it would be if you could edit the files stored on your Web server directly without the cumbersome download-edit-upload routine? Web-based Distributed Authoring and Versioning (WebDAV) is the way to do it. A WebDAV server works like a file server that uses HTTP as the underlying protocol. It facilitates collaborative editing and versioning. If you manage a Web server or an enterprise document management system, where different authors need to edit resources, WebDAV is a useful way of providing write access to them. You can use the Apache modules mod_dav and mod_dav_fs for basic WebDAV functionality, while a Subversion module for Apache, mod_dav_svn, provides versioning support.
Managing one site on a Web server can be tough enough, and the job is even harder if you have to host multiple client sites on a badly configured setup. If you're running Apache, you can make things easier by setting up virtual hosts, which let you control multiple domains on one IP address, allowing you to specify URLs like http://clientsdomain.com/file_name.html instead of http://yoursite.com/hosted/clients_directory/file_name.html, and letting you forgo setting up domain forwarding with a /srv/www/htdocs/hosted/clients_directory file.
If you maintain a portal, ecommerce site, or heavily trafficked Web site, you might appreciate the ability to identify the geographical location of your site visitors. Geolocation information can help you localize content, serve relevant local advertisements, offer a download mirror close to visitors, and detect online fraud. Techniques like whois lookup of IP addresses are of some help, but they don't always find accurate locations. A better approach is a database that maps each IP address to a location -- such as MaxMind's GeoIP.
There may or may not be a need for an Apache module implementation of the Atom Publishing Protocol, but Tim Bray has gone ahead and created one anyhow.
Apache Maven 1.1 was released yesterday as the final release with new features to the 1.x branch of Maven. Maven is an open source project management tool for Java developers.