2015-09-08 22:10 GMT+02:00 Brian <brian...@emailbb.com>: > Hello José, > > That’s a nice idea indeed (A VERY NICE ONE!), but an extra work because of > the networking effort. I'm talking about a site that can get hundreds of > requests per second.
But you would want to execute ServletRequest.getRemoteHost() in every request , right ? That was your question. I don't know how is the Tomcat 6's ServletRequest.getRemoteHost() implementation , but I guess it's not very different to my code Regards > > Since Nginx has access to this information, I bet there must be a way to pass > it to Tomcat the same way the IP address can be passed! But for some reason I > can't find it and I have spent quite some time looking for it. > > Thanks a lot! > > >> -----Original Message----- >> From: Jose María Zaragoza [mailto:demablo...@gmail.com] >> Sent: martes, 08 de septiembre de 2015 02:58 p.m. >> To: Tomcat Users List <users@tomcat.apache.org> >> Subject: Re: ServletRequest.getRemoteHost() not working when Tomcat is >> behind Nginx (Nginx as a reverse proxy) >> >> 2015-09-08 21:22 GMT+02:00 Brian <brian...@emailbb.com>: >> > Hi, >> > >> > >> > >> > First of all, I'm using: >> > >> > - Tomcat 7.0.50 >> > >> > - Nginx 1.4.7 >> > >> > >> > >> > When I use Tomcat alone, ServletRequest.getRemoteHost() >> > >> (http://docs.oracle.com/javaee/6/api/javax/servlet/ServletRequest.html#getRe >> > moteHost() >> > >> <http://docs.oracle.com/javaee/6/api/javax/servlet/ServletRequest.html#getRe >> > moteHost())> ) works fine. But when Tomcat is behind Nginx (Nginx acting >> > as a reverse proxy), it does not. >> > >> > Just to make myself clear, this is the architecture I'm talking about: >> > >> > >> > >> > Client -----> Nginx (as a reverse proxy) -----> Tomcat. >> > >> > >> > >> > The problem is that ServletRequest.getRemoteHost() gives me the hostname of >> > the proxy itself (meaning Nginx) and not that of the client. >> > >> > >> > >> > I was able to get the IP address of the visitor (and not that of the host >> > where Nginx is running) doing this on Nginx: >> > >> > >> > >> > server { >> > >> > listen 80; >> > >> > server_name www.acme.com acme.com; >> > >> > location / { >> > >> > proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; >> > <------- This line did the trick >> > >> > proxy_set_header Host $http_host; >> > >> > proxy_pass http://152.53.163.220:80/; >> > >> > } >> > >> > } >> > >> > >> > >> > And then inspecting the content of the "X-Forwarded-For" header in my java >> > programming. But what do I do to obtain the remote hostname? I guess it is >> > something similar, but I haven't found a solution. What I want to know is: >> > >> > - Exactly what configuration do I need in Nginx >> > >> > - Exactly what do I do from Java to obtain the value. >> >> Why not do you perform a reverse DNS lookup by code ? Something like : >> >> InetAddress addr = InetAddress.getByName("xx.xx.xx.xx"); >> String host = addr.getCanonicalHostName(); >> System.out.println(host); >> >> You only need to extract 'X-Forwarded-For' header from request and >> execute that piece of code >> >> >> Regards >> >> > >> > >> > >> > Thanks in advance, >> > >> > >> > >> > Brian >> > >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org >> For additional commands, e-mail: users-h...@tomcat.apache.org > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
