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Filter doubts
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Micheal John
Ranch Hand
Joined: Nov 01, 2006
Posts: 344
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What is the main purpose of Filter? I can't get it.. Why/where to use filters?
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Micheal John
SCJP 1.4 (86%), SCWCD 1.4 (86%), SCBCD 1.3 (85%), SCDJWS (Just Started...) - Satisfaction Lies in Our EFFORT, Not in the ATTAINMENT
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Muhammad Saifuddin
Ranch Hand
Joined: Dec 06, 2005
Posts: 1318
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read (online) the chapter 9 : Servlet And Jsp Filters of SERVLETS and JAVASERVER PAGES by Marty Hall
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Saifuddin..
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Dave Wingate
Ranch Hand
Joined: Mar 26, 2002
Posts: 262
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You might also be interested in this thread.
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Fun programming etcetera!
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Bear Bibeault
Author and ninkuma
Marshal
Joined: Jan 10, 2002
Posts: 56185
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Filters are used for any purpose for which you may wish to pre-process or post-process requests.
For example, I extensively use filters for authentication checking.
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Adeel Ansari
Ranch Hand
Joined: Aug 15, 2004
Posts: 2874
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Typically fitlers are used for caching purpose, authentication puropose (as Bear already mentioned), compression purpose and etc.
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Micheal John
Ranch Hand
Joined: Nov 01, 2006
Posts: 344
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Why we have to use Filters for authentication? If I am configuring the DD with <login-config>BASIC/DIGEST</login-config>, it will take care of the authentication? Then Why we should use Filters for authentication?
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Bear Bibeault
Author and ninkuma
Marshal
Joined: Jan 10, 2002
Posts: 56185
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Not all authentication requirements can be handled by the simple, built-in schemes.
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Micheal John
Ranch Hand
Joined: Nov 01, 2006
Posts: 344
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Thanks to all of you and especially to Saif uddin, who gievn the wondeful link to Filters by Hall and his explanation is good and thanks once again thanks to (H)all!!
[ January 16, 2007: Message edited by: Micheal John ]
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subject: Filter doubts
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