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From Xilei Wang <xwang_t...@yahoo.com>
Subject ajp12, ajp13, mod_webapp, and http protocols
Date Sat, 05 May 2001 01:01:17 GMT
Hi Tomcat group,

I am using mod_jk right now and I am wondering why
ajp12, ajp13, and mod_webapp protocols were originally
introduced.

http protocol can be passed through most firewalls
whereas ajp12 and ajp13 can not.  In some real world
websites, there are lots of cases that there is an
inner firewall between Web server and web container.

http protocol version 1.1's "keepalive" could be used
for consistant connections.

Almost all the available web containers have at least
one http listener while some of them do not support
ajpxx protocols, such as the current Orion.

I implemented an http worker in mod_jk by myself and
it works fine for me.

So, my question is, what are the advantages of ajp12,
ajp13, and mod_webapp protocols versus http protocol?

Quite possiblly I missed or misunderstood something. 
Any feedback is greatly appreciated.

Thanks.

-- Kevin

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