/public-ip

public-ip webapi sample

Primary LanguageC#

public ip

description

Simple webapi that returns the public ip of the connecting client

quickstart

dotnet build -c Release

  • copy src/bin/Release/net9.0/publish folder to some /srv/app/public-ip ( see below publish with script )

  • setup a nginx ( see below nginx )

connect to https://util.somedomain/ip to get public ip of connecting client.

deploy samples

nginx

Following an example of /etc/nginx/conf.d/util.somedomain.conf replacing

  • somedomain with the domain name ( to enable https cert see here )
  • UTILSERVERIP with the ip where this service run ( see setup systemd )
server {
  root /var/www/html;

  server_name util.somedomain;
  access_log /var/log/nginx/util.access.log;
  error_log /var/log/nginx/util.error.log notice;  

  location /ip/ {
    rewrite /ip / break; # handle exact /ip request rewrite to /
    rewrite /ip/(.*) /$1 break; # handle /ip/somearg requests rewrite to /someargs
    include /etc/nginx/mime.types;
    
    proxy_set_header Host $host;
    proxy_pass http://UTILSERVERIP:5001;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
  }

  listen 443 ssl;
  ssl_certificate /etc/letsencrypt/live/somedomain.com/fullchain.pem;
  ssl_certificate_key /etc/letsencrypt/live/somedomain.com/privkey.pem;
  include /etc/letsencrypt/options-ssl-nginx.conf;
  ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;
}

server {
  if ($host = util.somedomain.com) {
    return 301 https://$host$request_uri;
  }

  server_name util.somedomain.com;
  listen 80;
  return 404;
}

util server service

following and example for the systemd service /etc/systemd/system/public-ip.service

[Unit]
Description=Public ip utility
After=network.target
StartLimitIntervalSec=0

[Service]
Type=simple
Restart=always
RestartSec=10
User=user
Group=user
SyslogIdentifier=public-ip
KillSignal=SIGINT
EnvironmentFile=/root/security/public-ip.env
ExecStart=/srv/app/public-ip/bin/PublicIp

[Install]
WantedBy=multi-user.target

where the /root/security/public-ip.env could contains

DOTNET_ROOT=/opt/dotnet
ASPNETCORE_ENVIRONMENT=Production
ASPNETCORE_URLS=http://UTILSERVERIP:5001

publish with script

following and example of a publish.sh script to publish the app to a server

#!/bin/bash

exdir=$(dirname $(readlink -f "$BASH_SOURCE"))

cd "$exdir"

dotnet publish -c Release

rsync -arvx --delete "$exdir"/src/bin/Release/net9.0/publish/ main-apps:/srv/app/public-ip/bin/

ssh main-apps service public-ip restart

how this project was built

mkdir public-ip

dotnet new sln
dotnet new gitignore
dotnet new webapi -o src -n PublicIp -f net9.0 --no-openapi --no-https
dotnet sln add src