4.3 Conditional branches

Conditional request modifications can be organized in logical branches, each branch being applied only if the request matches certain condition. The Rewrite section encloses a set of request matching rules followed by one or more request modification statements, which will be applied if the former match the request. Optional Else sub-section, which in turn contains request matching rules and modification statements, will be tried if those rules don’t match. Any number of Else sub-sections is allowed, each one being tried if the previous ones don’t match.

The example below illustrates this concept. This configuration snippet sets different paths depending on the file type and URL used:

Service
    Rewrite
        Header "Content-Type:[[:space:]]+image/.*"
        SetPath "/images%[path]"
    Else
        Match AND
            Host "example.org"
            Path "\\.[^.]+$"
        End
        SetPath "/static%[path]"
    Else
        Path "\\.[^.]+$"
        SetPath "/assets%[path]"
    End
    ...
End