Without the condition, this rule would create a loop, with every request matching that rule and being sent back to itself.
Conditions Rewrite rules can be preceded by one or more rewrite conditions, and these can be strung together. If all goes well you should be redirected to http: If a HTTP header is used in a condition this header is added to the Vary header of the response in case the condition evaluates to to true for the request.
This flag is effective only for comparisons between TestString and CondPattern.
They are comma-separated, and contained in square brackets. The condition operates in a similar way to the rule. Either an absolute or a relative URL can be given in the substitution section.
If you only want to apply a rule if one of two conditions match, rather than repeat the rule, add the "OR" flag to the first condition, and if either match then the following rule will be applied. Otherwise, the rule is skipped.
The rule is intended to only redirect requests missing the "www" URL portion, though, and the condition preceding the rule ensures that this happens.
You can also set special flags for CondPattern by appending [flags] as the third argument to the RewriteCond directive, where flags is a comma-separated list of any of the following flags: It allows you to set up a condition that must be true for the following RewriteRule to be processed.
Generally this is a good idea, unless you want the URL to be rewritten further by other RewriteRules later in the. Instead of rewriting the URL internally, Apache will send a message back to the browser an HTTP header to tell it that the document has moved temporarily to the URL given in the "substitution" section.
The general syntax of the directive is: Here are the various ways rewrite conditons can be processed: This creates a rule for rewriting one URL to another. Avoiding errors when reorganizing your site. Many webpages can be accessed via several URLs — for example, www.
There are some special variants of CondPatterns. Includes 3 practical examples: Exceptions and Special Cases Rewrite conditions can be tested in a few different ways - they do not need to be treated as regular expression patterns, although this is the most common way they are used.
So this flag should be only used if the meaning of the Vary header is well understood. Avoiding errors Occasionally you might change the URL of a page on your site.
Following that is what should actually be tested, and then the pattern to test. If used in per-server context i. Place these in a. Most of the time, this is the same as LA-U above. It is not added if the condition evaluates to false for the request.
If you use the Lynx browser which is terminal-basedthen you get the min homepage which could be a version designed for easy, text-only browsing.
CondPattern is the condition pattern, a regular expression which is applied to the current instance of the TestString. You can add as many RewriteRule lines as you like to your.
Directives are simply configuration settings. Other things you should be aware of: Beginner Published on 3 January Categories:The mod_rewrite module uses a rule-based rewriting engine, based on a PCRE regular-expression parser, to rewrite requested URLs on the fly. By default, mod_rewrite maps a URL to a filesystem path.
However, it can also be used to redirect one URL to another URL, or to invoke an internal proxy fetch. URL rewriting with Apache's mod_rewrite.
No flags means that the specified URL (which can be a local file path, absolute URL, or a relative URL for the same server) will be retrieved and.
Many practical examples employing mod_rewrite are discussed in the detailed mod_rewrite documentation. File Not Found Inevitably, URLs will be requested for which no matching file can be found in the filesystem.
Is there any way to rewrite a path to an absolute url rather than a relative url address? The reason why I need to do this is because I am rewriting URLs on a subdomain, but my forum is located on the top level domain and shares the urls from the subdomain.
But since I am rewriting urls on the. I am trying to achieve a basic URL redirection for pretty-URLs, and due to images, CSS etc.
also residing in the same path I need to make sure that if the URL is accessed without a trailing slash. All external redirects (R flag) result in mod_rewrite requiring an absolute URL.
When you don't explicitly include the scheme and hostname in the RewriteRule substitution then Apache will use the current protocol, server name and port.
Apache (or strictly speaking, mod_rewrite) doesn't send a relative URL back in the Location: HTTP response header hoping that the user-agent will resolve the URL.Download