Using Rewrite maps. Enabling Pretty Permalinks in WordPress. Testing rule and condition patterns. The following additions, changes, and important bug fixes have been made to URL rewrite module since the Go Live release:.
Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. It tells Apache to do a i. Apache will send the new URL back to the browser or search engine, and the browser or search engine will have to request it again. And search engines will take note of the new URL and update their databases. Smashing Magazine runs on the popular blogging software WordPress.
If you are requesting an existing image or the log-in page wp-login. Internally, index. If you are hired to recreate an existing website from scratch, you might use URL rewriting to redirect the 20 most popular URLs on the old website to the locations on the new website.
This could involve redirecting things like prod. This can be accomplished like so:. For complex content-managed websites, there is still the issue of how to map friendly URLs to underlying resources.
The simple examples above did that mapping by hand, manually associating a URL like horses. Wikipedia looks up the resource based on the title, and WordPress applies some complex internal rule sets. But what if your data is more complex, with thousands of products in hundreds of categories? This section shows the approach that Amazon and many other shopping websites take.
This is very unlikely. The bit at the end is what really matters. It shows that the URL can be automatically generated and can include up to three parts:. Many other shopping websites have URLs like this. In the list below, the ID number and suspected identifier are in bold:. A significant benefit of this type of URL is that the actual words can be changed, as shown below. So products can be renamed without breaking old links. More sophisticated websites like Ciao above will redirect the changed URL back to the real one and thus avoid creating the appearance of duplicate content see below for more on this topic.
Now you know how to map nice friendly URLs to their underlying Web pages, but how should you create those friendly URLs in the first place? If we followed the current advice, we would separate words with hyphens rather than underscores and capitalize consistently. Lowercase might be preferable because most people search in lowercase. You might want to remove apostrophes and parentheses entirely for the same reason.
Whether to replace accented characters is debatable. URLs with accents or any non-Roman characters might look bad or break when rendered in a different character format. But replacing them with their non-accented equivalents might make the URLs harder for search engines to find and even harder if replaced with hyphens. If your website is for a predominately French audience, then perhaps leave the French accents in.
But substitute them if the French words are few and far between on a mainly English website. Search engines generally ignore duplicate content i. But if they think they are being manipulated, search engines will actively penalize the website, so avoid this where possible. Google recommends using redirects to send users from old pages to new ones.
Furthermore, to avoid any risk of duplication, the old URL should automatically redirect to the new one, as WordPress does. Doing this in PHP is relatively easy. If you would like to use this function, be sure to test it in your environment first and with your rewrite rules, to make sure that it does not cause any infinite redirects.
The difference in wording between URL redirect and URL rewrite is subtle but has important implications for providing resources to clients.
A URL redirect involves a client-side operation, where the client is instructed to access a resource at a different address than the client originally requested. This requires a round trip to the server. The redirect URL returned to the client appears in the browser's address bar when the client makes a new request for the resource. When redirecting requests to a different URL, indicate whether the redirect is permanent or temporary by specifying the status code with the response:.
The - Moved Permanently status code is used where the resource has a new, permanent URL and you wish to instruct the client that all future requests for the resource should use the new URL. The client may cache and reuse the response when a status code is received.
The - Found status code is used where the redirection is temporary or generally subject to change. The status code indicates to the client not to store the URL and use it in the future. A URL rewrite is a server-side operation that provides a resource from a different resource address than the client requested.
Rewriting a URL doesn't require a round trip to the server. The rewritten URL isn't returned to the client and doesn't appear in the browser's address bar. Although the client might be able to retrieve the resource at the rewritten URL, the client isn't informed that the resource exists at the rewritten URL when it makes its request and receives the response.
The app applies redirect and rewrite rules and shows the redirected or rewritten URL for several scenarios. Also, use the middleware when the app is hosted on HTTP.
Some of the features of the server modules don't work with ASP. In these scenarios, use the middleware instead. Benchmarking is the only way to know for sure which approach degrades performance the most or if degraded performance is negligible. Rewrite package, which is implicitly included in ASP. Establish URL rewrite and redirect rules by creating an instance of the RewriteOptions class with extension methods for each of your rewrite rules. Chain multiple rules in the order that you would like them processed.
AddRedirectToWwwPermanent : Permanently redirect the request to the www subdomain if the request is non- www. Redirects with a StatusPermanentRedirect status code. AddRedirectToWww : Redirect the request to the www subdomain if the incoming request is non- www.
Redirects with a StatusTemporaryRedirect status code. An overload permits you to provide the status code for the response. Use a field of the StatusCodes class for a status code assignment. Use AddRedirect to redirect requests. The first parameter contains your regex for matching on the path of the incoming URL. The second parameter is the replacement string.
The third parameter, if present, specifies the status code. If you don't specify the status code, the status code defaults to - Found , which indicates that the resource is temporarily moved or replaced.
The redirect URL is sent back to the client with a - Found status code. The browser makes a new request at the redirect URL, which appears in the browser's address bar. Since no rules in the sample app match on the redirect URL:. Be cautious when establishing redirect rules. Redirect rules are evaluated on every request to the app, including after a redirect. It's easy to accidentally create a loop of infinite redirects. The part of the expression contained within parentheses is called a capture group.
The dot. If the status code isn't supplied, the middleware defaults to - Found. If the port isn't supplied:.
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