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Appendix A Caching Solutions and Performance 133
In a typical Server Accelerator configuration, there should be a reverse-map rule
for every map rule, with the origin URL and replacement URL of the map rule
reversed.
Examples of rules and translations
The following examples illustrate several important cases of rewrite rules.
Example 1 This map rule does not specify a path prefix in the target or replacement:
This rule results in the following translations:
Example 2 Map rules with path prefixes specified in the target:
These rules result in the following translations:
Example 3 The order of the rules matters:
These rules result in the following translation:
map http://www.x.com/ http:/server.hoster.com/x/
User Request Translated Request
http://www.x.com/Widgets/
index.html
http://server.hoster.com/x/Widgets/
index.html
http://www.x.com/cgi/form/
submit.sh?arg=true
http://server.hoster.com/x/cgi/
form.submit.sh?arg=true
map http://www.y.com/marketing http://marketing.y.com/
map http://www.y.com/sales http://sales.y.com
map http://www.y.com/engineering http://engineering.y.com/
map http://www.y.com/ http://info.y.com/
User Request Translated Request
http://www.y.com/marketing/projects/
manhattan/specs.html
http://marketing.y.com/projects/
manhattan/specs.html
http://www.y.com/marketing/projects/
boston/specs.html
http://info.y.com/marketing/projects/
boston/specs.html
http://www.y.com/engineering/
marketing/requirements.html
http://engineering.y.com/marketing/
requirements.html
map http://www.g.com/ http://external.g.com/
map http://www.g.com/stuff http://stuff.g.com
User Request Translated Request
http://www.g.com/stuff/a.gif http://external.g.com/stuff/a.gif