URL rewriting

To understand why these extra steps need to be performed, recall that the URL rewriting engine is at the ASP. NET level.

To see how HTTP handlers can be used to perform URL rewriting, consult the code available for download with this article.

If you're not using URL rewriting, you need to have the front controller specified.

Under regular expression URL rewriting, every rewritten URI has at least one denotative twin.

Custom headers are commonly used for session management when using URL-rewriting.

Depending on your setup, you might have URL rewriting, dynamic generation by pathname, and so on.

A simple and common example of URL rewriting is in mapping path-based resource descriptions onto FastCGI (or just CGI) calls.

URL rewriting enables you to transparently forward requests to the new page location.

URL rewriting is the process of intercepting an incoming Web request and automatically redirecting it to a different URL.

In my defense, it's a lot more difficult to set up a PHP service that handles POST, DELE, and all the URL rewriting required by REST.

Prior to ASP. NET, URL rewriting on IIS Web servers needed to be implemented using an ISAPI filter.

However, we will discuss the tradeoffs between implementing URL rewriting as an ISAPI filter versus using techniques available in ASP. NET.

The good news is that, in general, you do not need to understand URL rewriting to use it.

URL rewriting is the process of intercepting an incoming Web request and redirecting the request to a different resource.

Over the next section we'll look at building a reusable URL rewriting engine.

Finally, I'll assume that your Apache Web server is configured to support virtual hosting, URL rewriting, and PUT and DELETE requests.

The remaining three sections of this article examine real-world uses of URL rewriting.

To demonstrate the URL rewriting engine in action, let's build an ASP. NET Web application that utilizes simple URL rewriting.

Web clippers perform URL rewriting on all hypertext links before returning the Web content to the browser.

The ASP. NET page developer utilizing the URL rewriting engine can specify the rewriting rules in the Web. config file.

The entire code for the URL rewriting engine is available for download with this article.

First, you'll need to indicate in the Web. config file if you want perform URL rewriting with the HTTP module or the HTTP handler.

So, when should URL rewriting be performed in an HTTP module?

We'll also see how URL rewriting can be used to create an intelligent 404 error.

You can configure these URL rewriting options when you create a Web clipper, or you can add these options later.

So, if you rely on Windows authentication and file authorization, you will want to use the HTTP module approach for URL rewriting.

URL rewriting is used to manipulate URL paths before the request is handled by the Web server.

Web clippers do this using a technique called URL rewriting.

We will use the portlet from the URL Rewriting section of this article.

When you have completed these steps, the finished URL Rewriting Example Web clipper should look like Figure 8.

Figures 5, 6, and 7 show the URL rewriting in action.

Controlling link traversal behavior with URL rewriting