Obtain IP address from nodejs using nginx, socket.io and https - node.js

Question

I'm trying to obtain the client IP address from socket object but since I work in https the address is undefined.
const app = require('https').createServer(optIO).listen(5000);
const io = require('socket.io').listen(app);
io.on('connection', function (socket) {
console.log('connected: ', socket.request.connection.remoteAddress);
});
I tried to using headers but I didn't know how to do it.
My default.conf file:
server {
listen 443 ssl http2;
listen [::]:443 ssl http2;
root /var/www/html;
index index.php index.html;
server_name server.com;
ssl on;
ssl_certificate /var/www/cer/server.chained.crt;
ssl_certificate_key /var/www/cer/server.key;
ssl_prefer_server_ciphers on;
ssl_protocols TLSv1.2;
ssl_ciphers EECDH+CHACHA20:EECDH+AES128:RSA+AES128:EECDH+AES256:RSA+AES256:EECDH+3DES:RSA+3DES:!MD5;
ssl_session_cache shared:SSL:5m;
ssl_session_timeout 5m;
location / {
try_files $uri $uri/ /index.html;
}
add_header Strict-Transport-Security "max-age=15768000" always;
error_page 404 /404.html;
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /var/www/html;
}
location ~ .php$ {
try_files $uri =404;
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
include fastcgi_params;
}
location ~ /\.ht {
deny all;
}
}
server {
listen 80;
listen [::]:80;
server_name server.com;
return 301 https://www.$server_name$request_uri;
}
My nginx.conf file:
user nginx;
worker_processes 1;
error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;
events {
worker_connections 4096;
}
http {
include /etc/nginx/mime.types;
default_type application/octet-stream;
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
access_log /var/log/nginx/access.log main;
sendfile on;
#tcp_nopush on;
keepalive_timeout 5;
gzip on;
include /etc/nginx/conf.d/*.conf;
}
I'm using Socket.io 2.01, Nginx 1.12.0 and Node.js 6.10 in Debian Jesse.

Answer 1

socket.handshake.address.address;

Answer 2

I found the solution in Socket.io with nginx
I put this inside default.conf
server {
listen 443 ssl http2;
{...}
location ~* \.io {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_set_header X-NginX-Proxy true;
proxy_pass https://localhost:5000;
proxy_redirect off;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
}
}