[PATCH] Normalizing the Host: header

Poul-Henning Kamp phk at phk.freebsd.dk
Fri Mar 11 23:39:24 CET 2011


In message <4D7A7A4F.3030109 at schokola.de>, Nils Goroll writes:

>can we come to a conclusion of this discussion?

What bothers me is the "magic" aspect of this kind of stuff.

Where does the magic intuitively begin and end ?

Should we also case fold anything compared to or matched to the
host header ?

What about host part of Location headers ?

Where does the magic end ?

I very much prefer to make these things explict and consistent,
so that people see them happen and know where they happen.

... but I also don't want to clutter up default.vcl with "mandatory stuff".

>- case-folding once in-place does not use any additional session space
>  as case-folding in VCL would

In my mind, this is probably the best argument for doing it,
I am just not sure it convinces me.

Next issue which comes right behind is: Should we also
normalize URL's by reducing pointless %xx and other escapes ?

Are there any other kinds of request normalization we should do ?

And should we also normalize backend responses ?

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.



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