use the current language in "Accept-Language" HTTP header

package/yast2-registration.spec

@@ -31,8 +31,10 @@ Requires:       yast2-pkg-bindings >= 2.17.20
 # Y2Logger
 Requires:       yast2-ruby-bindings >= 3.1.7
 # SCC API library
-Requires:       rubygem-scc_api
+Requires:       rubygem-scc_api >= 0.2.3
 Requires:       yast2-slp >= 3.1.2
+# Language module
+Requires:       yast2-country
 
 BuildRequires:  yast2 >= 2.23.13
 BuildRequires:  update-desktop-files

src/clients/inst_scc.rb

@@ -47,6 +47,7 @@ def main
       Yast.import "Mode"
       Yast.import "Progress"
       Yast.import "PackageCallbacks"
+      Yast.import "Language"
 
       # redirect the scc_api log to y2log
       SccApi::GlobalLogger.instance.log = Y2Logger.instance
@@ -95,6 +96,9 @@ def main
     def register(email, reg_code)
       scc = SccApi::Connection.new(email, reg_code)
 
+      # set the current language to receive translated error messages
+      scc.language = language
+
       # announce (register the system) first
       credentials = run_with_feedback(_("Registering the System..."), _("Contacting the SUSE Customer Center server")) do
         scc.announce
@@ -243,6 +247,19 @@ def ensure_zypp_config_writable
       end
     end
 
+    def language
+      lang = Language.language
+      log.info "Current language: #{lang}"
+
+      # remove the encoding (e.g. ".UTF-8")
+      lang.gsub!(/\..*$/, "")
+      # replace lang/country separator "_" -> "-"
+      # see http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.4
+      lang.gsub!("_", "-")
+
+      log.info "Language for HTTP requests set to #{lang.inspect}"
+      lang
+    end
   end
 end