JSP AND JAVA SERVLETS


Directory Structure:
Before you activate the Tomcat server for a domain, Make these directories and files in the root directory of your domain (case sensitive):
/WEB-INF/
/WEB-INF/classes/
/WEB-INF/lib/
/WEB-INF/web.xml
The web.xml is an XML file describing the servlets and other components that make up your application, along with any initialization parameters and container-managed security constraints that you want the server to enforce for you. A basic web.xml file can be found HERE
/WEB-INF/classes/ is where any Java class files are located. If your classes are organized into Java packages, you must reflect this in the directory hierarchy.
For example, a Java class named 'com.mycompany.mypackage.MyServlet' would need to be stored in a file named: /WEB-INF/classes/com/mycompany/mypackage/MyServlet.class.
/WEB-INF/lib/ contains JAR files that contain Java class files (and associated resources) required for your application, such as third party class libraries or JDBC drivers.
More information can be found HERE
Tomcat Manager
To activate or remove the Tomcat server from a domain, go to Tomcat Manager under Account Details on the control panel.
The tomcat server is restarted at midnight every day. This is when any changes will take effect.
Reloading
You may need to reload the Tomcat server on a domain if you make changes to your class files or web.xml. This can be done from the Tomcat Manager on the control panel. Choose your domain from the list, make sure Reload is selected and click Next Step. The reload is instant.
 

TELNET & SSH

To log in to your server, you must use the SSH2 protocol. This is a secure version of Telnet that uses encryption.
For security reasons, all IP addresses are denied SSH access on our servers. To use SSH, you will need to send us a support request asking to be enabled for this service.
Once enabled, an 'SSH MANAGER' option will appear on the Web Tools page of your control panel. This tool allows you to enter your IP address(es) into the system, which will then unblock them.
Please note: For security reasons, these IP addresses will be flushed every night at round 4am.
Never leave your account's home directory when you are in Telnet/SSH as this breaks our terms and conditions.

Telnet Client

If you do not have a Telnet client that supports SSH2, you can download one below:
http://www.controlpanel.cc/putty.exe
The login details you need to use are:
Protocol: SSH2
Hostname: username.dns-systems.net

Telnet Commands

Listed below are some basic Telnet commands:
• ls - This is like typing 'dir' in DOS. It displays files in the current directory.
• pwd - Tells you which directory you are currently in.
• cd directoryname - Changes into the specified directory.
• cd .. - Moves out of the current directory.
• unzip filename.zip - Unzips a ZIP file into the current directory.
• vi file.txt - VI is linux's version of notepad. For more help, look Here
• logout - Logs out of the server.
 

FTP


FTP (file transfer protocol) is the main method of up loading files to you web space, it can also be used to make directories etc. Every account comes with at least one FTP login and password, this is the same as you use to login to the control panel.
To FTP into your account you will first need to get a copy of an FTP program, we recommend Cute FTP, which you can get from www.cuteftp.com. To set up you FTP client you will need to give it some information about our server, this information is listed below:
Username & Password - This is the same as you choose when you started the account and you will find it in your welcome e-mail.
Host name - username.dns-systems.net or you can use any domain on our system by just entering yourdomian.com (no http://). If you would like to have personal ftp server address ie ftp.yourdomain.com then just make the subdomain ftp for the domian you would like the personal ftp.
Host Type - All our servers are Unix based, running Linux operating systems.
 

HTACCESS FILES


You can use a file called .htaccess which is used to change properties of directories on your web-site, such as password protecting them, redirecting people to other addresses, or creating custom error messages.
 

.HTACCESS: PASSWORD PROTECTED DIRECTORIES


1. Make a text file called htaccess.txt in notepad and put the following lines in it:
AuthUserFile /home/username/directoy id/path to directory/.htpasswd
AuthName "My secret area"
AuthType Basic
require valid-user

The top line is the path to the directory you want to password protect. You will need to change the 'username' and 'directory id'. You can find this information on the Account Details page on the control panel.
The .htpasswd contains usernames and passwords, we will create this a bit later.
The "My secret area" text can be anything you want. It will be displayed in the password box when someone tries to access the protected area of the site.
2. Make another text file called htpasswd.txt in notepad and put the following lines in it:
username:password

'username' is the username you want to use, and 'password' is the encrypted password. You can encrypt your password by going to http://www.controlpanel.cc/password.php and copying the encrypted text into your htpasswd.txt file.
You can have as many username:password lines as you want.
3. Upload the two files to the directory that you want passworded. Rename the text files to .htaccess and .htpasswd in your ftp program.
When you go to the web-site, a password window should now appear.
 

.HTACCESS: CUSTOM ERROR MESSAGES


Make a text file called htaccess.txt and enter the following text into it:
ErrorDocument 404 /notfound.html

'404' is the error number (404 means: file not found) and '/notfound.html' is the custom error html document. Upload the file into the directory you want the redirect to work in, then rename it to .htaccess
 

.HTACCESS: REDIRECTION


Make a text file called htaccess.txt and enter the following text into it:
Redirect / http://www.other-site.com

Change 'http://www.other-site.com' to the URL you want the user to be directed to. Upload the file into the directory you want the redirect to work in, then rename it to .htaccess
 

.HTACCESS: RESTRICTING CONTENT


Prevent directory listing
Put the following into a .htaccess file to stop people viewing a directory on your web-site. They will still be-able to access individual files:
Options -Indexes

Restricting access for certain IP addresses
Put the following into a .htaccess file to block IP's from your entire site or directory. Replace the IP addresses with your own values:
Order Allow,Deny
Deny from 111.111.111.111 222.222.222.222
Allow from all

 

.HTACCESS: PHP Configuration


There are two settings you can put into a .htaccess file that allow you to change certain PHP INI settings:
php_value - Used to set a string PHP INI directive. For example: '/path/to/mydir/'
php_flag - Used to set a boolean PHP INI directive. For example: 'On' or 'Off'
EXAMPLES:
php_value include_path /usr/local/lib/php
php_flag register_globals On
 

.HTACCESS: File Types


You can alter the way certain files are handled using a .htaccess file. Some examples are below:
ForceType
The ForceType directive will tell the web-server to treat all files in the current directory as one mime-type. For example, to treat all files in the current directory as PHP files, use the following:
ForceType application/x-httpd-php
AddType
The AddType directive allows you to add new mime-types or alter mime-types for different file extensions. For example:
AddType image/gif .gif
AddHandler
You can use the AddHandler directive to create a cgi-bin directory anywhere in your web-space. The following example will alter the current directory to be a cgi-bin directory:
Options +ExecCGI
AddHandler cgi-script cgi pl
For more information regarding the ForceType and AddHandler directives, Click Here
 

CRON TUTORIAL


Cron allows you to run a program or script at certain times, for example: every 10 minutes or once a day.
Kunal Kapoor has very kindly written a Cron tutorial based around our system.

CLICK HERE to download the tutorial (800k).