RL-ARM User's Guide

HTTP Server

Hypertext Mark-up Language (HTML) is the primary language for formatting web pages. With HTML, you describe what a page must look like, what types of fonts to use, what color the text should be, where paragraph marks must come, and many more aspects of the document.

There are two types of web pages which are stored on a web server and sent to a web client on request:

• Static Web pages do not change their content. When the page is requested, it is sent to the web client as it is. It is not modified.
• Dynamic Web pages are generated when the page is requested. Pages that show system settings or log records are examples of dynamic pages.

RL-TCPnet supports both of them. Static web pages are generally stored in the virtual ROM file system. The files are converted into C-code by the FCARM file converter and compiled into code.

Supported Features and Technologies

The Embedded Web server has integrated several advanced features, which support the usage of many advanced web technologies:

• Script language
  is used to generate Dynamic Web pages.
• Ajax programming
  allows you to move the Web page processing from the Web server to the client browser.
• SOAP interface
  allows you to produce some cutting edge user interfaces.
• HTTP Caching
  supports the local caching at the browser and improves the Web Server performance a lot.
• Web on SD Card
  allows you to store the complete Web site resource files on SD Card. Web files can be updated with HTTP file upload.
• Access filtering
  allows you to filter out the hosts, which are not allowed to connect to the Web Server.
• Multi-language Web pages
  You can use language information to generate language specific web pages with the help of the integrated script language.
• Multi-user Web authentication
  allows you to add additional user accounts and different access rights for each user.

Note

• To use an Embedded Web Server, you must enable and configure it in the configuration file.