More specific error messages for problems with schleuder-api-daemon

config/initializers/zzz_check_api_version.rb

@@ -12,6 +12,14 @@ if API_REQUIRED
       Rails.logger.error "schleuder-api-daemon is not running! '#{exc}'. This schleuder-web will be very useless without schleuder-api-daemon!"
     rescue ActiveResource::BadRequest => exc
       Rails.logger.error "schleuder-api-daemon returned HTTP status code 400: '#{exc}'. Please have a look at its output to find out about the causal problem. This schleuder-web will be very useless without schleuder-api-daemon!"
+    rescue ActiveResource::UnauthorizedAccess => exc
+      Rails.logger.error "Authentication failed with schleuder-api-daemon! Please check that the configured `api_key` is correct (in config/schleuder-web.yml)"
+    rescue ActiveResource::SSLError => exc
+      if exc.message.include?("certificate verify failed")
+        Rails.logger.error "Verifying the certificate of schleuder-api-daemon failed! Please check that the configured `tls_fingerprint` is correct (in config/schleuder-web.yml)."
+      else
+        Rails.logger.error "An unknow SSL-related error occurred while contacting schleuder-api-daemon: #{exc}"
+      end
     rescue StandardError => exc
       Rails.logger.error "An unknown error occurred while contacting schleuder-api-daemon: #{exc}"
     end