How to determine by what IP Address my website has been accessed?
jakarta-ee, java, jsp, servlets, url
Solution
Use method getRemoteAddr() from interface ServletRequest or methods getHeaders() form interface HttpServletRequest:
HttpServletRequest httpRequest = (HttpServletRequest) request;
String userIpAddress = httpRequest.getHeader("X-Forwarded-For");
There's one caution for using the method getRemoteAddr:
Sure you can use the method and in general case you will get IP of client. However, the method is useless if an user is behind a proxy. In this case you'll get the proxy server's IP address and not the client. But the proxy may include the requesting client IP in a special `HTTP` header. So to retrieve real-client-IP call method `getHeader("X-Forwarded-For")`.
An example usage in JSP:
Use set value of IP address in session using JSTL:
<c:set var="userIp" value="${requestScope.header('x-forwarded-for')}" scope="session" />
And then get this value from the session in a convenient place.
In JSP you can use `<c:out value="${sessionScope.userIp}" />` or in servlet as `session.getAttribute('userIp');`
Please read docs:
java.lang.String getRemoteAddr() returns the Internet Protocol (IP) address of the client or last proxy that sent the request.
Problem
I have a web application and for that I want to capture the IP address of the clients who are accessing my website so that I can know what region is the most accessing the application. I am using `Java EE` in my application. Probably there is some solution if we talk about header and when `request` is sent from the end-user.