Hello Jeff,

Thanks for your reply.

On 9/3/2013 6:58 AM, Jeff Trawick wrote:
Since the URL validation in apr_uri_parse() has been tightened in the handling of the scheme portion of a URL,

    I submitted a patch to httpd bug 55315 against the mod_proxy code
    in httpd trunk to handle the special case
    of interpolating a variable in the scheme portion of a URL.

    - https://issues.apache.org/bugzilla/show_bug.cgi?id=55315


Do you know if it is practical to have the one magic path down to ap_proxy_define_worker() munge the URI? I guess the problem is that ap_proxy_define_worker() saves the parsed uri, and the caller (add_pass or whatever it is) doesn't have access to that?

I take your point to be that the mod_proxy patch I submitted cannot be applied to the branches, since it changes the API. So I've submitted a new patch that is applied further up the stack in add_pass() in mod_proxy.c.

It is interesting that my research seems to indicate that mod_proxy interpolation was actually the first to be introduced into the code.

I guess the order is this:

1. support for environment variables in the config
2. mod_proxy interpolation
3. core server starts complaining if you have something that looks like an envvar reference that isn't resolved

Is that what you mean?

The double use of ${} is nasty. In the fullness of time, I think that mod_proxy interpolation should support an additional syntax that doesn't collide with the config-time processing.

Yes, that is the point that I was trying to make.

Thanks,

Mike Rumph

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