Nguyễn Thành Long long25vn

Virtual Hosts on nginx (CSC309)

When hosting our web applications, we often have one public IP address (i.e., an IP address visible to the outside world) using which we want to host multiple web apps. For example, one may wants to host three different web apps respectively for example1.com, example2.com, and example1.com/images on the same machine using a single IP address.

How can we do that? Well, the good news is Internet browsers

Hey! I saw this has been indexed by the search engines. It is a first draft of a post I ended up publishing on my blog at: Scaling PostgreSQL With Pgpool and PgBouncer

Thanks for stopping by!

PostgreSQL and Pgpool Architecture

Copying Values from JSON to Struct using reflect Package

This is a sample script for copying values from JSON to a struct using reflect package.

Script :

package main

import (
	"encoding/json"
	"fmt"

	bash-4.3# cat /proc/1/cpuset
	/docker/13f8c221656e202db979d1e607c9c902282d8719ab70715978dd04ee6069d61e
	bash-4.3# DOCKER_CID=$(cat /proc/1/cpuset \| cut -c9-)
	bash-4.3# echo $DOCKER_CID
	13f8c221656e202db979d1e607c9c902282d8719ab70715978dd04ee6069d61e

	version: '3'

	services:
	frontproxy:
	image: traefik
	command: --api --docker
	ports:
	- "80:80"
	- "443:443"
	volumes:

	# to list all ports that are used
	sudo netstat -ntlp \| grep LISTEN

	# you can obtain a specific port using the following command
	sudo netstat -ntlp \| grep :8080

	# when you execute the command above you will see some thing like that
	tcp 0 0 0.0.0.0:27370 0.0.0.0:* LISTEN 4394/skype
	tcp 0 0 127.0.1.1:53 0.0.0.0:* LISTEN 2216/dnsmasq
	tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN 4912/cupsd

	package main

	import (
	"flag"
	"golang.org/x/net/websocket"
	"io"
	"log"
	"net"
	"net/http"
	"os"

	<html>
	<head>
	<title>WebSocket demo</title>
	</head>
	<body>

	<div>
	<form>
	<label for="numberfield">Number</label>
	<input type="text" id="numberfield" placeholder="12"/><br />

	package main

	import (
	"fmt"
	"sync"
	"time"
	)

	func main() {