INTRODUCTION
------------------
I didn't really know what to call this article, but the title notwithstanding,
this article takes you through how to get rid -not exactly, of that damned
http://localhost, thingie when you are running your webapp locally -using a local
httpd like apache, or the more complete package, lampp, wampp or xampp.
This article only discusses apache, but I bet there is some smartie out there who
will make it work for IIS or something.
Please note that I used xampp for this example, because I was trying to stop myself
from, como se dice, swala-ing. So no GNU/Linux (lampp).
The above issue having been brought to the reader's attention, I must add that for
people who have been working with apache, lampp and GNU/Linux will find a way around this
article to make it work for them. However if the gentlemen -ladies too, refered to in
this paragraph just can't make it work, please let me know so I extend this issue to
cover lampp.
PRE-REQUISITES
--------------------
A knowledge of how http daemons, web servers work is assumed in this article
Also a knowledge of name resolution, be it DNS -if you don't know what this means,
this article is not for you, is assumed.
For those lacking the above pre-requisites, I am not in the mood to provide links,
so you just might as well google it.
>:) Happy Hunting!!! (:<
------------------
I didn't really know what to call this article, but the title notwithstanding,
this article takes you through how to get rid -not exactly, of that damned
http://localhost, thingie when you are running your webapp locally -using a local
httpd like apache, or the more complete package, lampp, wampp or xampp.
This article only discusses apache, but I bet there is some smartie out there who
will make it work for IIS or something.
Please note that I used xampp for this example, because I was trying to stop myself
from, como se dice, swala-ing. So no GNU/Linux (lampp).
The above issue having been brought to the reader's attention, I must add that for
people who have been working with apache, lampp and GNU/Linux will find a way around this
article to make it work for them. However if the gentlemen -ladies too, refered to in
this paragraph just can't make it work, please let me know so I extend this issue to
cover lampp.
PRE-REQUISITES
--------------------
A knowledge of how http daemons, web servers work is assumed in this article
Also a knowledge of name resolution, be it DNS -if you don't know what this means,
this article is not for you, is assumed.
For those lacking the above pre-requisites, I am not in the mood to provide links,
so you just might as well google it.
>:) Happy Hunting!!! (:<
DISCUSSION
---------------
Okay, again a recap of the top story...
The article is targeted at final year students who are working on web applications
for their projects. During development the project is hosted locally using a httpd
like -most commonly apache.
The project is then accessed in the browser via http://localhost/theproject, for
viewing and whatever one does during web development.
The problem is that during the presentation, after the development of the project,
using the http://localhost/theproject address to access the webapp is not really
'ish'.
We would want to use an address like www.theproject.org, -please note I am making an
assumption here that the reader is fairly, como se dice, knows whats up!
So how do we achieve this.
This process is two-fold,
1. We need a way to resolve the address www.theproject.org to our ip address.
2. We need a way to make our httpd know what page to serve depending on what
site name we request.
WARNING: All changes made in this article are made as root, so please make backup
copies of the configuration files before you edit them, just in case.
1. RESOLVING www.theproject.org TO IP ADDRESS USING /etc/hosts
------------------------------------------------------------------------------------
Whenever you type an address, like www.facebook.com in the browser, the browser does
name resolution to map the human-rememberable form www.facebook.com to the form the browser can work with, ip adress. This is called Name resolution -approximately.
Name resolution on personal computers is done in two steps, first the TCP/IP stack,
tries to resolve a domain name|host by refering to a file in /etc/hosts.
If a match is found in this file, the TCP/IP stack replaces the domain name|host with
the ip adress blah blah blah.
If the attempt at using /etc/hosts does not turn up a match, the TCP/IP stack then uses
DNS to do the name resolution, and if everything works out fine, DNS returns the ip
address for the domain name|host. DNS is not something I will talk about here.
In our situation, our site www.theproject.org is not a registered domain, it is just a
name we want to use, so we will like to avoid the DNS part, by making an entry for our
site in the /etc/host file.
The /etc/hosts path is for those using GNU/Linux, for those using Windows, the host
file is in c:\windows\system32\drivers\etc\hosts.
Open a new line, and type the following, please use tabs, not spaces;
---------------
Okay, again a recap of the top story...
The article is targeted at final year students who are working on web applications
for their projects. During development the project is hosted locally using a httpd
like -most commonly apache.
The project is then accessed in the browser via http://localhost/theproject, for
viewing and whatever one does during web development.
The problem is that during the presentation, after the development of the project,
using the http://localhost/theproject address to access the webapp is not really
'ish'.
We would want to use an address like www.theproject.org, -please note I am making an
assumption here that the reader is fairly, como se dice, knows whats up!
So how do we achieve this.
This process is two-fold,
1. We need a way to resolve the address www.theproject.org to our ip address.
2. We need a way to make our httpd know what page to serve depending on what
site name we request.
WARNING: All changes made in this article are made as root, so please make backup
copies of the configuration files before you edit them, just in case.
1. RESOLVING www.theproject.org TO IP ADDRESS USING /etc/hosts
------------------------------------------------------------------------------------
Whenever you type an address, like www.facebook.com in the browser, the browser does
name resolution to map the human-rememberable form www.facebook.com to the form the browser can work with, ip adress. This is called Name resolution -approximately.
Name resolution on personal computers is done in two steps, first the TCP/IP stack,
tries to resolve a domain name|host by refering to a file in /etc/hosts.
If a match is found in this file, the TCP/IP stack replaces the domain name|host with
the ip adress blah blah blah.
If the attempt at using /etc/hosts does not turn up a match, the TCP/IP stack then uses
DNS to do the name resolution, and if everything works out fine, DNS returns the ip
address for the domain name|host. DNS is not something I will talk about here.
In our situation, our site www.theproject.org is not a registered domain, it is just a
name we want to use, so we will like to avoid the DNS part, by making an entry for our
site in the /etc/host file.
The /etc/hosts path is for those using GNU/Linux, for those using Windows, the host
file is in c:\windows\system32\drivers\etc\hosts.
Open a new line, and type the following, please use tabs, not spaces;
127.0.0.1 www.theproject.org
::1 www.theproject.org
The above lines causes any name resolution attempt for www.theproject.org to return
the address 127.0.0.1, you can replace the loopback address with another address if
you are going to access the project over a local network.
Usefulness: If you want to, you can actually eliminate the time the browser uses to do
DNS name resolution, by creating entries for all the sites you frequent, hypothetically
this should improve your browsing speed, -initially, please note, I haven't actually
done the study, hence the word hypothetical you see.
2. MAKING APACHE SERVE THE RIGHT PAGE(S) FOR www.theproject.com
----------------------------------------------------------------------------------------
The Apache httpd, has a functionality known as virtual hosts http://httpd.apache.org/docs/2.2/vhosts/.
According to the apache docs:
The term Virtual Host refers to the practice of running more
the address 127.0.0.1, you can replace the loopback address with another address if
you are going to access the project over a local network.
Usefulness: If you want to, you can actually eliminate the time the browser uses to do
DNS name resolution, by creating entries for all the sites you frequent, hypothetically
this should improve your browsing speed, -initially, please note, I haven't actually
done the study, hence the word hypothetical you see.
2. MAKING APACHE SERVE THE RIGHT PAGE(S) FOR www.theproject.com
----------------------------------------------------------------------------------------
The Apache httpd, has a functionality known as virtual hosts http://httpd.apache.org/docs/2.2/vhosts/.
According to the apache docs:
The term Virtual Host refers to the practice of running more
than one web site(such as www.company1.com and
www.company2.com) on a single machine.
Virtual hosts can be "IP-based", meaning that you have a
Virtual hosts can be "IP-based", meaning that you have a
different IP address for every web site, or "name-based",
meaning that you have multiple names running
on each IP address. The fact that they are running on the
same physical server is not apparent to the end user.
Interesting huh? We are interested in name-based virtual host. Why?
Because, we don't want to mess with the httpd serving correctly via http://localhost,
we just want it to add www.theproject.org to the mix, hence our choice.
To do that the NameVirtualHost directive must be added to the httpd.conf file, with path
c:/xampp/apache/conf/httpd.conf for Windows and for GNU/Linux i have no idea, but if you
need it that bad you could run a find for it, with;
Interesting huh? We are interested in name-based virtual host. Why?
Because, we don't want to mess with the httpd serving correctly via http://localhost,
we just want it to add www.theproject.org to the mix, hence our choice.
To do that the NameVirtualHost directive must be added to the httpd.conf file, with path
c:/xampp/apache/conf/httpd.conf for Windows and for GNU/Linux i have no idea, but if you
need it that bad you could run a find for it, with;
find / -name httpd.conf -exec gedit {}\;
We need to add the following under the 'Main Server configuration' section, right below
the DocumentRoot settings;
the DocumentRoot settings;
NameVirtualHost *:80
<VirtualHost *:80>
ServerName localhost
DocumentRoot "C:/xampp/htdocs"
</VirtualHost>
<VirtualHost *:80>
ServerName www.theproject.org
DocumentRoot "C:/xampp/htdocs/theProject"
</VirtualHost>
ServerName localhost
DocumentRoot "C:/xampp/htdocs"
</VirtualHost>
<VirtualHost *:80>
ServerName www.theproject.org
DocumentRoot "C:/xampp/htdocs/theProject"
</VirtualHost>
The above assumes you are using xampp.
The NameVirtualHost *:80 directive says that we want to declare a virtual host for all
ip addresses on the server. A corresponding VirtualHost container must also be declared
for every NameVirtualHost.
The NameVirtualHost *:80 directive says that we want to declare a virtual host for all
ip addresses on the server. A corresponding VirtualHost container must also be declared
for every NameVirtualHost.
The first VirtualHost block handles request for the server localhost, and serves up pages
from the c:/xampp/htdocs directory, DocumentRoot.This block is important because
when you start using virtual hosts, the default configuration will not work, so you must
explicitly specify how request for the default configuration, localhost in this case is to
handled.
The second VirtualHost block, the one we are interested in, says
that for every request sent to all ip addresses, where the
server name requested is 'www.theproject.org', serve pages from the DocumentRoot
"C:/xampp/htdocs/theProject", this DocumentRoot will be replaced by
/opt/lampp/htdocs/theProject assuming you installed lampp to /opt in GNU/Linux, or again,
/www/theProject if you installed apache directly.
For more explanation on how virtual host works please refer to the apache docs, at
http://httpd.apache.org/docs/2.2/vhosts/.
After you have done all this, restart apache, and now go ahead and access your project
via www.theproject.org.
After doing all the above, congratulations, you may not be able to access you webapp. Why?
Because your browser may be configured to use a proxy, so it will try to resolve
www.theproject.org anyways.
The solution to this is simple;
1. disable proxy, set to no proxy
2. add the site www.theproject.org to the proxy exception list in your browser.
3. or both.
server name requested is 'www.theproject.org', serve pages from the DocumentRoot
"C:/xampp/htdocs/theProject", this DocumentRoot will be replaced by
/opt/lampp/htdocs/theProject assuming you installed lampp to /opt in GNU/Linux, or again,
/www/theProject if you installed apache directly.
For more explanation on how virtual host works please refer to the apache docs, at
http://httpd.apache.org/docs/2.2/vhosts/.
After you have done all this, restart apache, and now go ahead and access your project
via www.theproject.org.
After doing all the above, congratulations, you may not be able to access you webapp. Why?
Because your browser may be configured to use a proxy, so it will try to resolve
www.theproject.org anyways.
The solution to this is simple;
1. disable proxy, set to no proxy
2. add the site www.theproject.org to the proxy exception list in your browser.
3. or both.
Now try again and voila, we are in business. If you did not do voila at the point, please
go over again, and if failing persists, consult me, I might be able to help :)
go over again, and if failing persists, consult me, I might be able to help :)
Usefulness: I used this procedure to setup a bulletin board system on my department's local network, and made it possible for
members to access that local BBS with a name like www.css.org.
