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Java servlets are used to deliver some of the key features of the Code Style Web site. This article briefly introduces each, with hyperlinks to working examples throughout the site.
The FontSampler servlet that delivers the Web font sampler is an example of a lightweight Java servlet fulfilling a typical CGI function. This servlet class accepts a limited number of query parameters that are used to present standing text with CSS rules for named fonts, or to display an image of the named font.
The EchoRequest servlet lists all the HTTP headers and URL request parameters sent by Web browsers. This servlet can be used for debugging servlets and with HTML form submissions and browser issues, it reflects whatever request data is sent.
The AnchorPoints class is a simple redirection servlet used as a form based navigation mechanism . The ultimate destination URL is passed to the servlet as a query parameter, and uses an HTTP 302 Found response to forward requests. See the Code Style Site log archive navigation for a working example.
The ViewSource servlet returns a selected Javascript or CSS source file with the content type text/plain render as plain text. The addition of a number=true request parameter adds line numbering to the output.
View the source of this page for example, click Back to return.
ViewSequence is a servlet that shows a numbered sequence of image files with custom page titles and navigational links. All pages are generated dynamically from parameters passed in the initial request and include links to advance to the original article. See the installation steps in the Apache JServ on Windows 95 article for examples of this servlet.
