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copied!<p>The <a href="http://httpd.apache.org/docs/2.2/mod/mod_alias.html#redirect" rel="nofollow noreferrer"><code>Redirect</code></a> directive does only work with the <a href="http://httpd.apache.org/docs/2.2/mod/directive-dict.html#Syntax" rel="nofollow noreferrer">URL path</a> but not the host or query of the URL.</p> <p>But it is possible with <a href="http://httpd.apache.org/docs/2.2/mod/mod_rewrite.html" rel="nofollow noreferrer">mod_rewrite</a>:</p> <pre><code>RewriteCond %{HTTP_HOST} =example.org RewriteCond %{QUERY_STRING} =id=1 RewriteRule ^default\.asp$ http://www.example.org/newpage.html [NC,L,R=301] </code></pre> <p>And as already said in the comments, you can use a <a href="http://httpd.apache.org/docs/2.2/mod/mod_rewrite.html#rewritemap" rel="nofollow noreferrer">rewrite map</a> for the ID-to-alias mapping:</p> <pre><code>1 foo-page 2 bar-page 3 baz-page … </code></pre> <p>The <code>RewriteMap</code> declaration (here a simple plain text file):</p> <pre><code>RewriteMap id-to-alias txt:/absolute/file/system/path/to/id-to-alias.txt </code></pre> <p>And finally the application:</p> <pre><code>RewriteCond %{HTTP_HOST} =example.org RewriteCond %{QUERY_STRING} ^(([^&]*&)*)id=([0-9]+)&?([^&].*)?$ RewriteCond ${id-to-alias:%3}&%1%4 ^([^&]+)&(.*) RewriteRule ^default\.asp$ http://www.example.org/%1.html?%2 [NC,L,R=301] </code></pre> <p>That should also preserver the remaining query. If you don’t want that:</p> <pre><code>RewriteCond %{HTTP_HOST} =example.org RewriteCond %{QUERY_STRING} ^(([^&]*&)*)id=([0-9]+)&?([^&].*)?$ RewriteCond ${id-to-alias:%3} .+ RewriteRule ^default\.asp$ http://www.example.org/%0.html? [NC,L,R=301] </code></pre>

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