Re: Upper and lower case strings in Varnish

2010-02-03 Thread Poul-Henning Kamp 
In message 4b69ab1a.6010...@mangahigh.com, Richard Chiswell writes:
Hi all,

I've got a simple question which I've been puzzling on for the last 30 
minutes or so - how do you change a string in Varnish to lowercase?

Basically, all the links on our site should be lowercase, but some 
people have been randomly capitalising them when linking to them - I'd 
just like Varnish to issue a 301 redirect to the lowercased version of 
the URL: everything is in place apart from converting the string to 
lowercase.

You'll have to use a bit of inline C code to do that.

Poul-Henning

-- 
Poul-Henning Kamp   | UNIX since Zilog Zeus 3.20
p...@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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Re: Upper and lower case strings in Varnish

2010-02-03 Thread Richard Chiswell 
Hi Poul,

Poul-Henning Kamp wrote:
 In message 4b69ab1a.6010...@mangahigh.com, Richard Chiswell writes:
   
 I've got a simple question which I've been puzzling on for the last 30 
 minutes or so - how do you change a string in Varnish to lowercase?
 
 You'll have to use a bit of inline C code to do that.
   
Thanks Poul - any chance of any example of how to do this with a regular 
expression: we currently have:
set obj.http.Location = http://; req.http.host / 
regsub(req.url,^/(en_gb/|en_us/)?([A-Za-z]+)/?(.*)$,\1\2);
but we only want the \1 lowercased -I've got to
set obj.http.Location = http://; req.http.host / 
regsub(req.url,^/(en_gb/|en_us/)?([A-Za-z]+)/?(.*)$,C{char 
str[255];str=\1;for (i=0;str[i];i++) { str[i]=tolower(str[i]);return 
str;}C\2);
but that doesn't seem to work. I don't suppose you can point me in the 
right direction (it's been over 10 years since I've done C [since then 
C++, C#.Net, PHP, Perl and Java: so remembering what's valid syntax is 
bad enough, and I've got no idea about the passing to/from varnish side 
of things).

Thank you,
Richard
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Re: Upper and lower case strings in Varnish

2010-02-03 Thread Laurence Rowe 
I don't think it's possible to write a regex that will do that in one
go. There's a dumb solution though:

set obj.http.Location regsuball(obj.http.Location, A, a);
set obj.http.Location regsuball(obj.http.Location, B, b);
...

Laurence

On 3 February 2010 17:15, Richard Chiswell
richard.chisw...@mangahigh.com wrote:
 Hi Poul,

 Poul-Henning Kamp wrote:
 In message 4b69ab1a.6010...@mangahigh.com, Richard Chiswell writes:

 I've got a simple question which I've been puzzling on for the last 30
 minutes or so - how do you change a string in Varnish to lowercase?

 You'll have to use a bit of inline C code to do that.

 Thanks Poul - any chance of any example of how to do this with a regular
 expression: we currently have:
 set obj.http.Location = http://; req.http.host /
 regsub(req.url,^/(en_gb/|en_us/)?([A-Za-z]+)/?(.*)$,\1\2);
 but we only want the \1 lowercased -I've got to
 set obj.http.Location = http://; req.http.host /
 regsub(req.url,^/(en_gb/|en_us/)?([A-Za-z]+)/?(.*)$,C{char
 str[255];str=\1;for (i=0;str[i];i++) { str[i]=tolower(str[i]);return
 str;}C\2);
 but that doesn't seem to work. I don't suppose you can point me in the
 right direction (it's been over 10 years since I've done C [since then
 C++, C#.Net, PHP, Perl and Java: so remembering what's valid syntax is
 bad enough, and I've got no idea about the passing to/from varnish side
 of things).

 Thank you,
 Richard
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Re: Upper and lower case strings in Varnish

2010-02-03 Thread Cosimo Streppone 
On 3 February 2010 17:15, Richard Chiswell
richard.chisw...@mangahigh.com wrote:

 Hi Poul,

 Poul-Henning Kamp wrote:
 In message 4b69ab1a.6010...@mangahigh.com, Richard Chiswell writes:

 I've got a simple question which I've been puzzling on for the last 30
 minutes or so - how do you change a string in Varnish to lowercase?

 You'll have to use a bit of inline C code to do that.

I'm no varnish or C expert, YMMV etc...
but I managed to get something like this working.

It's a VCL with embedded C that reads the Accept-Language header
and rewrites it (or writes into a different header, actually) the
result of some processing function.

Take a look at the examples here:

http://github.com/cosimo/varnish-accept-language/tree/master/examples

sample.vcl is the main VCL file, from which you embed the other one,
accept-language.vcl, which in turn contains the C function you want
to use.

I think `vcl_rewrite_accept_language()' is what you need.
Then you're only missing the upper-lower case bit.

-- 
Cosimo
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