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Apache: Name Based Virtual Host

The server machine has a primary name server.domain.tld. Then there are two aliases (CNAMEs) for that server say www.domain.tld and www.sub.domain.tld for the address server.domain.tld.

We need different server configuration for each name so that each name can act as differrent web servers.

Here is the configuration for the vhost.conf file (the one that will be included in the main config file httpd.conf)

The asterisks match all addresses, so the main server serves no requests. Due to the fact that www.domain.tld is first in the configuration file, it has the highest priority and can be seen as the default or primary server.

Apache: Config for IP-based virtual hosts

Setup 1

The server machine has two IP addresses (111.22.33.44 and 111.22.33.55) which resolve to the names server.domain.tld and www.otherdomain.tld respectively. The hostname www.domain.tld is an alias (CNAME) for server.domain.tld and will represent the main server.

Here is the configuration for the vhost.conf file (the one that will be included in the main config file httpd.conf)

www.otherdomain.tld can only be reached through the address 111.22.33.55, while www.domain.tld can only be reached through 111.22.33.44 (which represents our main server).

Setup 2

Same as setup 1, but we don’t want to have a dedicated main server.

Here is the configuration for the vhost.conf file (the one that will be included in the main config file httpd.conf)

The main server can never catch a request, because all IP addresses of our machine are in use for IP-based virtual hosts (only localhost requests can hit the main server).

Setup 3:

The server machine has two IP addresses (111.22.33.44 and 111.22.33.55) which resolve to the names server.domain.tld and www-cache.domain.tld respectively. The hostname www.domain.tld is an alias (CNAME) for server.domain.tld and will represent the main server. www-cache.domain.tld will become our proxy-cache listening on port 8080, while the web server itself uses the default port 80.

Here is the configuration for the vhost.conf file (the one that will be included in the main config file httpd.conf)

The main server can never catch a request, because all IP addresses (apart from localhost) of our machine are in use for IP-based virtual hosts. The web server can only be reached on the first address through port 80 and the proxy only on the second address through port 8080.

Port-based vhosts

The server machine has one IP address (111.22.33.44) which resolves to the name www.domain.tld. If we don’t have the option to get another address or alias for our server we can use port-based vhosts if we need a virtual host with a different configuration.

Here is the configuration for the vhost.conf file (the one that will be included in the main config file httpd.conf)

A request to www.domain.tld on port 80 is served from the main server and a request to port 8080 is served from the virtual host.

Pendahuluan

Class C# di bawah ini berguna untuk mengakses file Ini yang memanfaatkan 2 functions dari KERNEL32.dll, yaitu : WritePrivateProfileString dan GetPrivateProfileString

Namespaces yang diperlukan System.Runtime.InteropServices dan System.Text

Class

using System;
using System.Runtime.InteropServices;
using System.Text;

namespace Ini
{
    /// <summary>
    /// Create a New INI file to store or load data
    /// </summary>

    public class IniFile
    {
        public string path;

        [DllImport("kernel32")]
        private static extern long WritePrivateProfileString(string section,
            string key,string val,string filePath);
        [DllImport("kernel32")]
        private static extern int GetPrivateProfileString(string section,
                 string key,string def, StringBuilder retVal,
            int size,string filePath);

        /// <summary>
        /// INIFile Constructor.
        /// </summary>
        /// <PARAM name="INIPath"></PARAM>

        public IniFile(string INIPath)
        {
            path = INIPath;
        }

        /// <summary>
        /// Write Data to the INI File
        /// </summary>
        /// <PARAM name="Section"></PARAM>
        /// Section name
        /// <PARAM name="Key"></PARAM>
        /// Key Name
        /// <PARAM name="Value"></PARAM>
        /// Value Name

        public void IniWriteValue(string Section,string Key,string Value)
        {
            WritePrivateProfileString(Section,Key,Value,this.path);
        }

        /// <summary>
        /// Read Data Value From the Ini File
        /// </summary>
        /// <PARAM name="Section"></PARAM>
        /// <PARAM name="Key"></PARAM>
        /// <PARAM name="Path"></PARAM>
        /// <returns></returns>

        public string IniReadValue(string Section,string Key)
        {
            StringBuilder temp = new StringBuilder(255);
            int i = GetPrivateProfileString(Section,Key,"",temp,
                                            255, this.path);
            return temp.ToString();

        }
    }
}

Menggunakan class

Langkah yang diperlukan untuk menggunakan class Ini:

1. Pada definisi project namespace tambahkan:

   using Ini;

2. Buat object berjenis INIFile seperti ini:

   INIFile ini = new INIFile("C:\\test.ini");

3. Gunakan IniWriteValue untuk menulis nilai baru pada suatu key dalam sebuah section atau gunakan IniReadValue untuk membaca suatu value dari sebuah key dalam suatu Section.
4. Misalnya isi dari test.ini adalah sbb:

   [database]
   conn=mssql

5. Maka untuk membaca nilai dari key conn, dapat digunakan perintah sbb:

   string conn = ini.IniReadValue("database", "conn");

Akhmad Daniel Sembiring

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Sumber: www.codeproject.com