I am trying to print the IP adress of the logged user in my webApplication. If a user connects from another PC (which is under the same network, as the web application is running in my pc) using the IP address 192.168.10.120:8080/WebApplication the code request.getRemoteAddr() or request.getLocalAddr()) returns his IP address. When I log in from my pc which run the web application, I get this IP address 0:0:0:0:0:0:0:1.
Why is that? And what's the difference between these commands (which should I use?).Thank you a lot!
getLocalAddr() gets the IP address of the machine to receive the request. Source. In contrast, getRemoteAddr() obtains the IP address of the machine to request the resource Source.
In your case, as you are trying to access it on your local machine,so it will return that value. But let one of your friend access it, and you will receive the expected result with getRemoteAddr
From the javadoc:
getRemoteAddr - Returns the IP address of the client or last proxy that sent the request
getLocalAddr - Returns the IP address of the interface on which the request was received.
As we move over to IPv6 from IPv4, they are changing the loopback address (localhost) to 0:0:0:0:0:0:0:1 from 127.0.0.1 thats why you are getting this address.
As for the functions:
getRemoteAddr() returns the clients IP
getLocalAddr() returns the IP of the server the application is running on
getRemoteAddr() solves your purpose but if client is behind any proxy then you will get IP address of proxy :
Returns the Internet Protocol (IP) address of the client or last proxy that sent the request.
getLocalAddr() returns the IP of the server the application is running on.
Follow WeChat
Success story sharing
Want to stay one step ahead of the latest teleworks?
Subscribe Now相似问题
- How can I create an executable JAR with dependencies using Maven?
- HTTP URL Address Encoding in Java
- How can I upload files to a server using JSP/Servlet?
- How can I avoid Java code in JSP files, using JSP 2?
- Why does this code using random strings print "hello world"?
- How to find out the currently logged-in user in Spring Boot?
- Difference between javax.servlet-api.jar vs servlet-api.jar
