caching php

[Cedric Tabary]

On 11/10/2006 16:17, Anton Stonor wrote:
> Cedric Tabary wrote:
> 
> >I removed the -t 1200, but my php is still cached !
> 
> Well, maybe the HTTP headers from the backend invites Varnish to cache. 
> Or there _could_ be a bug in Varnish.
> 
> Could you post an example HTTP header of an object you expect Varnish 
> not to cache?

I have a simple php script as example :
time.php:
<?
echo time();
?>

Here are the headers from the backend directly :
root at php10:~/varnish-cache% HEAD http://127.0.0.1:8080/time.php
200 OK
Connection: close
Date: Wed, 11 Oct 2006 14:20:08 GMT
Server: Apache/1.3.34 (Unix) PHP/4.4.2 mod_ssl/2.8.25 OpenSSL/0.9.7g
Content-Type: text/html; charset=iso-8859-1
Client-Date: Wed, 11 Oct 2006 14:20:08 GMT
Client-Peer: 127.0.0.1:8080
Client-Response-Num: 1
X-Powered-By: PHP/4.4.2

And the headers through varnish :
root at php10:~/varnish-cache% HEAD http://127.0.0.1/time.php
200 OK
Connection: close
Date: Wed, 11 Oct 2006 14:22:42 GMT
Via: 1.1 varnish
Age: 5
Server: Apache/1.3.34 (Unix) PHP/4.4.2 mod_ssl/2.8.25 OpenSSL/0.9.7g
Content-Length: 10
Content-Type: text/html; charset=iso-8859-1
Client-Date: Wed, 11 Oct 2006 14:22:47 GMT
Client-Peer: 127.0.0.1:80
Client-Response-Num: 1
X-Powered-By: PHP/4.4.2
X-Varnish: 1281745475 1281745470


I also managed to get a log of varnish inserting the php script in cache :

   12 SessionOpen  c 127.0.0.1 36672
   12 ReqStart     c 127.0.0.1 36672 1281745566
   12 RxRequest    c HEAD
   12 RxURL        c /time.php
   12 RxProtocol   c HTTP/1.1
   12 RxHeader     c Connection: close
   12 RxHeader     c Host: 127.0.0.1
   12 RxHeader     c User-Agent: lwp-request/2.06
   12 VCL_call     c recv
   12 VCL_return   c lookup
   12 VCL_call     c miss
   12 VCL_return   c fetch
   15 BackendOpen  b default 127.0.0.1 24543 127.0.0.1 8080
   15 BackendXID   b 1281745566
   12 Backend      c 15 default
   15 TxRequest    b GET
   15 TxURL        b /time.php
   15 TxProtocol   b HTTP/1.1
   15 TxHeader     b Host: 127.0.0.1
   15 TxHeader     b User-Agent: lwp-request/2.06
   15 TxHeader     b X-Varnish: 1281745566
   15 TxHeader     b X-Forwarded-for: 127.0.0.1
   15 RxProtocol   b HTTP/1.1
   15 RxStatus     b 200
   15 RxResponse   b OK
   15 RxHeader     b Date: Wed, 11 Oct 2006 14:29:19 GMT
   15 RxHeader     b Server: Apache/1.3.34 (Unix) PHP/4.4.2
mod_ssl/2.8.25 OpenSSL/0.9.7g
   15 RxHeader     b X-Powered-By: PHP/4.4.2
   15 RxHeader     b Connection: close
   15 RxHeader     b Transfer-Encoding: chunked
   15 RxHeader     b Content-Type: text/html; charset=iso-8859-1
   12 TTL          c 1281745566 RFC 120 1160576959 1160576959 0 0 0
   12 VCL_call     c fetch
   12 VCL_return   c insert
   12 ObjProtocol  c HTTP/1.1
   12 ObjStatus    c 200
   12 ObjResponse  c OK
   12 ObjHeader    c Date: Wed, 11 Oct 2006 14:29:19 GMT
   12 ObjHeader    c Server: Apache/1.3.34 (Unix) PHP/4.4.2
mod_ssl/2.8.25 OpenSSL/0.9.7g
   12 ObjHeader    c X-Powered-By: PHP/4.4.2
   12 ObjHeader    c Content-Type: text/html; charset=iso-8859-1
   12 ObjHeader    c Content-Length: 10
   15 BackendClose b default
   12 Length       c 10
   12 TxProtocol   c HTTP/1.1
   12 TxStatus     c 200
   12 TxResponse   c OK
   12 TxHeader     c Date: Wed, 11 Oct 2006 14:29:19 GMT
   12 TxHeader     c Server: Apache/1.3.34 (Unix) PHP/4.4.2
mod_ssl/2.8.25 OpenSSL/0.9.7g
   12 TxHeader     c X-Powered-By: PHP/4.4.2
   12 TxHeader     c Content-Type: text/html; charset=iso-8859-1
   12 TxHeader     c Content-Length: 10
   12 TxHeader     c X-Varnish: 1281745566
   12 TxHeader     c Age: 0
   12 TxHeader     c Via: 1.1 varnish
   12 TxHeader     c Connection: close
   12 ReqEnd       c 1281745566 1160576959.257762000
1160576959.258505000 0.002817000 0.000721000 0.000022000
    0 StatAddr       127.0.0.1 0 397 11 11 0 0 3 3218 0
   12 SessionClose c Connection: close
   12 StatSess     c 127.0.0.1 36672 0 1 1 0 0 1 284 0


Cédric