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Tip of the Day
Language: Java
Expertise: Beginner
Oct 30, 1999



Building the Right Environment to Support AI, Machine Learning and Deep Learning

Checking Browser Locale

Similar to GzipServlet, this tip uses header information for tuning output of our servlets; this one allows you to check the header 'Accept-Language'. If your user has set some language preferences within her own browser, you can read these settings through this header:
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class BrowserLocaleServlet extends HttpServlet {
    public void doGet 
(HttpServletRequest req,HttpServletResponse res) throws ServletException, IOException { doPost(req,res); } public void doPost (HttpServletRequest req,
HttpServletResponse res) throws ServletException, IOException { String userLocale=req.getHeader("Accept-Language"); PrintWriter out=res.getWriter(); res.setContentType("text/html"); out.println("<html>"); out.println("<br>User settings are: "+userLocale); out.println("</html>"); out.flush(); out.close(); } }
For example, in my case, the output is 'User settings are: en'. Depending on that settings, you can format, for example, your date before output. You should note that you have to see the HTTP manual for a full description of coding issues in this string.
Dmitry Namiot
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