Forum: NGINX proxy_cache_purge for nginx/0.8.34

Can somebody confirm that proxy_cache_purge is working with 
nginx/0.8.34.

I have this config and cannot get it to delete anything from the cache, 
I just get a 404:


location / {
  proxy_pass    http://127.0.0.1:8000;
  proxy_cache    tmpcache;
  proxy_cache_key    "$scheme://$host$request_uri";
}

location ~ /purge(/.*) {
  allow      127.0.0.1;
  deny      all;
  proxy_cache_purge  tmpcache   "$scheme://$host$1";
}


Thank you.

Posted at Nginx Forum: 
http://forum.nginx.org/read.php?2,61318,61318#msg-61318

> Can somebody confirm that proxy_cache_purge is working with nginx/0.8.34.

I just tested it and it works just fine.

Can you confirm that URL that you're trying to purge is indeed cached?
Can you post access logs (preferably with $upstream_cache_status) for 
the
cached URL and for failed purges?

Best regards,
Piotr Sikora < piotr.sikora@frickle.com >

My "purge" URL for the home-page (http://www.mysite.com/) is 
http://www.mysite.com/purge/
I get a 404 and nothing gets purged.

Same thing if I do it for a URL of this form:

http://www.mysite.com/test-2/2220
http://www.mysite.com/purge/test-2/2220 won't do anything, just getting 
a 404.

GET /test-2/2220             upstream_cache_status HIT
GET /purge/test-2/2220            upstream_cache_status -

Posted at Nginx Forum: 
http://forum.nginx.org/read.php?2,61318,63633#msg-63633

Piotr - is there any way to get proxy_cache_purge to log its activity? I 
am not sure it is even working, although I do not get any error message 
when restarting NGINX.

Posted at Nginx Forum: 
http://forum.nginx.org/read.php?2,61318,63634#msg-63634

It seems that I keep getting upstream_cache_status UPDATING
Does that mean the purging is scheduled somehow?

Posted at Nginx Forum: 
http://forum.nginx.org/read.php?2,61318,63636#msg-63636

Hi,

> location ~ /purge(/.*) {
> allow 127.0.0.1;
> deny all;
> proxy_cache_purge tmpcache   "$scheme://$host$1";
> }

> http://www.mysite.com/test-2/2220
> http://www.mysite.com/purge/test-2/2220 won't do anything, just getting a 
> 404.
>
> GET /test-2/2220             upstream_cache_status HIT
> GET /purge/test-2/2220            upstream_cache_status -

Just to make sure: are you requesting purges from localhost (127.0.0.1)?

> Piotr - is there any way to get proxy_cache_purge to log its activity? I 
> am not sure it is even working, although I do not get any error message 
> when restarting NGINX.

At this time it only logs successful purges at http debug level and 
failures
to delete files from hard disk at critical level.

> It seems that I keep getting upstream_cache_status UPDATING
> Does that mean the purging is scheduled somehow?

No, this has nothing to do with ngx_cache_purge.

Best regards,
Piotr Sikora < piotr.sikora@frickle.com >

> Just to make sure: are you requesting purges from
> localhost (127.0.0.1)?

No, why would I, nginx is listening to external IP.

> At this time it only logs successful purges at
> http debug level and failures 
> to delete files from hard disk at critical level.

how do I see this log? it will give me a clue into what the 
proxy_cache_purge is doing

> 
> > It seems that I keep getting
> upstream_cache_status UPDATING
> > Does that mean the purging is scheduled somehow?
> 
> No, this has nothing to do with ngx_cache_purge.
> 

 correct.

Thank you.

Posted at Nginx Forum: 
http://forum.nginx.org/read.php?2,61318,63742#msg-63742

Hi,

> No, why would I, nginx is listening to external IP.

Why would you? Did you at least look at *your* configuration?

> allow 127.0.0.1;
> deny all;

Your request is refused before it even reaches ngx_cache_purge module.

> how do I see this log? it will give me a clue into what the 
> proxy_cache_purge is doing

http://wiki.nginx.org/NginxCoreModule#error_log

Best regards,
Piotr Sikora < piotr.sikora@frickle.com >

Here's the config:


 location ~ ^/purge(/.*)$ {
                       allow 127.0.0.1;
                       allow 192.168.0.0/16;
                       allow 72.12.74.93;
                       deny all;
                       proxy_cache_purge  staticfilecache 
"$scheme://$host$1";
        }

Posted at Nginx Forum: 
http://forum.nginx.org/read.php?2,61318,63815#msg-63815

What IP address are you using to request purge?
Please show entries from properly formatted access log.

Best regards,
Piotr Sikora < piotr.sikora@frickle.com >

Public URL is http://www.mysite.com/test-2/2220

To request purge I try (on local server): wget 
www.mysite.com/purge/test-2/2220
or directly from browser (from one of the IPs in allow): 
www.mysite.com/purge/test-2/2220

log_format combinedx '$remote_addr - $remote_user [$time_local]  '
                    '"$request" $status $body_bytes_sent '
                    '"$http_referer" "$http_user_agent" '
                    'upstream_response_time $upstream_response_time '
                    'msec $msec request_time $request_time '
                    'Expires: $upstream_http_expires '
          'Cache-Control: $upstream_http_cache_control '
                    'upstream_cache_status $upstream_cache_status ';

access_log  "/var/log/nginx/access.log"  combinedx;


Thank you.

Posted at Nginx Forum: 
http://forum.nginx.org/read.php?2,61318,63848#msg-63848

Entries, not format.

Best regards,
Piotr Sikora < piotr.sikora@frickle.com >

74.65.58.194 - - [15/Mar/2010:00:35:29 -0400]  "GET /purge/ HTTP/1.0" 
404 1656 "-" "Wget/1.11.4 Red Hat modified" upstream_response_time - 
msec 1268627729.628 request_time 0.000 Expires: - Cache-Control: - 
upstream_cache_status -

Question: what am I supposed to see/get after a successful purge?

Thanks for all your help Piotr but I don't want to waste your time 
indefinitely.
All I need is to see the activity log for proxy_cache_purge, and we can 
go from there.

Thank you.

Posted at Nginx Forum: 
http://forum.nginx.org/read.php?2,61318,63894#msg-63894

> 74.65.58.194 - - [15/Mar/2010:00:35:29 -0400]  "GET /purge/ HTTP/1.0" 404
  ^^^^^^^^^^^^
this IP isn't on your allowed list:

> allow 127.0.0.1;
> allow 192.168.0.0/16;
> allow 72.12.74.93;

> Question: what am I supposed to see/get after a successful purge?

http://blog.s135.com/attachment/201001/nginx_purge.png

> Thanks for all your help Piotr but I don't want to waste your time 
> indefinitely.
> All I need is to see the activity log for proxy_cache_purge, and we can go 
> from there.

All you need to do is use proper access list. There is no activity when 
your
request is blocked in the access phase.

Best regards,
Piotr Sikora < piotr.sikora@frickle.com >

That is a dummy IP.

Now, seeing is believing -- I gave it another try and it actually gave 
me the response similar to the screenshot.
Not sure why but it is very sporadic. I believe that, if cache file 
doesn't exist response is still 404.
Of course, the cache file exists, therefore question is - why so 
sporadic.
Wouldn't be helpful to return a message "cache file does not exists" 
instead of a 404.

Thanks again.

Posted at Nginx Forum: 
http://forum.nginx.org/read.php?2,61318,63901#msg-63901

> That is a dummy IP.

I cannot investigate your problem when you're giving me false data.

> I believe that, if cache file doesn't exist response is still 404.

Yes, it is.

> Wouldn't be helpful to return a message "cache file does not exists" 
> instead of a 404.

No, 404 is standard HTTP response code for "File Not Found" and it is
exactly the response that any sane person would expect when "cached 
file"
does not exist. There is no way that this is gonna change.

Best regards,
Piotr Sikora < piotr.sikora@frickle.com >