diff --git a/dspace-server-webapp/src/main/java/org/dspace/app/rest/filter/ContentLanguageHeaderResponseFilter.java b/dspace-server-webapp/src/main/java/org/dspace/app/rest/filter/ContentLanguageHeaderResponseFilter.java new file mode 100644 index 0000000000..e5bda29c84 --- /dev/null +++ b/dspace-server-webapp/src/main/java/org/dspace/app/rest/filter/ContentLanguageHeaderResponseFilter.java @@ -0,0 +1,52 @@ +package org.dspace.app.rest.filter; + +import java.io.IOException; +import java.util.Locale; +import javax.servlet.Filter; +import javax.servlet.FilterChain; +import javax.servlet.FilterConfig; +import javax.servlet.ServletException; +import javax.servlet.ServletRequest; +import javax.servlet.ServletResponse; +import javax.servlet.http.HttpServletResponse; + +import org.dspace.core.I18nUtil; +import org.springframework.stereotype.Component; + +/** + * This filter assures that when the dspace instance supports multiple languages + * they are noted in the Content-Language Header of the response + * + * @author Mykhaylo Boychuk (at 4science.it) + */ +@Component +public class ContentLanguageHeaderResponseFilter implements Filter { + + @Override + public void init(FilterConfig filterConfig) throws ServletException { + } + + @Override + public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) + throws IOException, ServletException { + chain.doFilter(request, response); + + HttpServletResponse httpServletResponse = (HttpServletResponse) response; + if (!httpServletResponse.containsHeader("Content-Language")) { + Locale[] locales = I18nUtil.getSupportedLocales(); + StringBuilder locsStr = new StringBuilder(); + for (Locale locale : locales) { + if (locsStr.length() > 0) { + locsStr.append(","); + } + locsStr.append(locale.getLanguage()); + } + httpServletResponse.setHeader("Content-Language", locsStr.toString()); + } + } + + @Override + public void destroy() { + } + +}