https://issues.apache.org/bugzilla/show_bug.cgi?id=47066

           Summary: Header edit replacement string is not a format string.
           Product: Apache httpd-2
           Version: 2.2.10
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P5
         Component: mod_headers
        AssignedTo: [email protected]
        ReportedBy: [email protected]


It would be handy to have the replacement string in (Request)Header edit be a
formatted string or something similar to the rewritten URI in a rewrite rule.

An Example: add a port number from environment variable to Host Header

SetEnv envVariable {some port number from somewhere--a rewritemap lookup for
instance}

RequestHeader edit Host ^([^:]*) $1:%{envVariable}e


How I do it now:

SetEnv envVariable {some port number from somewhere}
Rewritecond %{HTTP:Host} ^([^:]*)
Rewriterule ^ - [env=newHost:%1:%{env:envVariable}]
RequestHeader set Host %{newHost}e

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