Add basic support for influencing language selection via cookies.

[mirror/dsa-puppet.git] / modules / roles / templates / apache-www.debian.org.erb

diff --git a/modules/roles/templates/apache-www.debian.org.erb b/modules/roles/templates/apache-www.debian.org.erb
index d221e0c..e673afd 100644 (file)
--- a/modules/roles/templates/apache-www.debian.org.erb
+++ b/modules/roles/templates/apache-www.debian.org.erb
@@ -130,6 +130,22 @@
    # this behavior, and proxies will be allowed to cache the documents.
    CacheNegotiatedDocs On
 
+   # The UI for language selection in browsers is rarely used or known about
+   # by visitors so websites need to provide a way for visitors to influence
+   # content negotiation using the website itself in addition to the browser.
+   # Setting a cookie is the simplest option for us as the URLs don't change.
+   # The GDPR does not apply and to satisfy the EU cookie law we can include
+   # some explanatory text around the form that sets the cookie.
+   # The use of POST requests will ensure each cookie is only set explictly.
+   # Since Apache mod_rewrite cannot inspect POST data, we use URLs instead.
+   RewriteEngine on
+   RewriteCond %{REQUEST_METHOD} ^POST$
+   RewriteRule /intro/cn/setlang/([a-z]{2}(?:-[a-z]{2})?)/(.*) /$2 [last,redirect,cookie=lang:$1:www.debian.org:40320:/:secure:]
+   RewriteCond %{REQUEST_METHOD} ^POST$
+   RewriteRule /intro/cn/unsetlang/(.*) /$2 [last,redirect,cookie=lang:invalid:www.debian.org:-1:/:secure:]
+   SetEnvIf Cookie "lang=(.+)" prefer-language=$1
+   Header append Vary cookie
+
 # Custom Error
    ErrorDocument 404 /devel/website/errors/404
    RewriteCond %{DOCUMENT_ROOT}/devel/website/errors/404.$2.html -f
@@ -145,7 +161,6 @@
 #   Redirect /OpenHardware http://www.openhardware.org
    Redirect /OpenSource https://opensource.org
    Redirect /Bugs/db/ix/pseudopackages.html /Bugs/pseudo-packages
-   RewriteEngine on
    RewriteRule ^/Bugs/db/pa/l([^/]+).html$ https://bugs.debian.org/$1
    RewriteRule ^/Bugs/db/[[:digit:]][[:digit:]]/([[:digit:]][[:digit:]][[:digit:]]+).html$ https://bugs.debian.org/$1
    RewriteRule ^/Bugs/db/ma/l([^/]+).html$ https://bugs.debian.org/cgi-bin/pkgreport.cgi?maintenc=$1