rustdoc: Preserve query/fragment in redirects whenever possible.

lifthrasiir · lifthrasiir · commit 4b271f3f64ce · 2014-12-04T12:48:16.000+09:00
We heavily rely on queries and fragments in the URL structure, so
it is desired to preserve them even in the redirects. The generated
redirect pages try to preserve them with scripts, which take
precedence over the original `Refresh` metadata. Non-scripting
browsers would continue to work (with no queries and fragments).
diff --git a/src/librustdoc/html/layout.rs b/src/librustdoc/html/layout.rs
@@ -160,13 +160,16 @@ r##"<!DOCTYPE html>
 }
 
 pub fn redirect(dst: &mut io::Writer, url: &str) -> io::IoResult<()> {
+    // <script> triggers a redirect before refresh, so this is fine.
     write!(dst,
 r##"<!DOCTYPE html>
 <html lang="en">
 <head>
     <meta http-equiv="refresh" content="0;URL={url}">
 </head>
 <body>
+    <p>Redirecting to <a href="{url}">{url}</a>...</p>
+    <script>location.replace("{url}" + location.search + location.hash);</script>
 </body>
 </html>"##,
     url = url,
