Briefly, the questions I need quick answers to are:
Can Apache be configured to directly proxy a request for content on a remote
server to the machine routing requests to the Internet (the connection to the
Internet) after looking for, and not finding, static content on the hard drive?.
Another question would be can another Apache instance on another port be
chained with the original server to proxy the requests to the routing machine
(if so, how).
First some background, see below for my detailed questions. ------>
Our project has setup a small server that uses Apache to serve web sites
we collect (with permission)in schools without Internet access. The server sits
on their network and serves up the content over their LAN. In some situations,
we would like to have the server behave more like a proxy server for schools
that have limited Internet access. If the content is not found in the
collection of web sites, then they would be passed on to their schools internet
connection and if their school uses a proxy on their network with caching, then
that would be hit first and then the connection out.
Currently, using the rewrite module, Apache tries to fulfill the request
from the directories on the appliances hard drive. If the content is not there
(if the request is for content on a remote host), Apache responds with a custom
error page. This essentially satisfies our goal of having the appliance act as
a stand-alone server in situations where the organization implementing the
eAppliance does not have a connection to the Internet.
Widernet needs the eAppliance to be flexible and to be able to work in an
organization that has a connection to the Internet. The appliance has to
either configure itself and/or have a one time configuration done by
programmers at the eGranary base (University of Iowa).
One solution is that Apache can be configured to directly proxy the
request for content on a remote server to the machine routing requests to the
Internet (the connection to the Internet). Another solution would be to have
another Apache server on another port proxy the requests to the routing
machine. So, the answers we need to know quickly are
whether Apache can be configured this way (if so, how) or if two or more Apache
instances can be chained to perform the same functionality.
Widernet programmers, University of Iowa
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