Re: Issuing a client side HTTP request from a module
Some Guy wrote: Hi all, Is there any facility in the Apache libs that allows module developers to act as a client? If not, I'll just use something like curl (or raw sockets), but wanted to know if there was an Apache way to do this. You'll have to co-opt a http client library or roll your own. -srp
Re: *** glibc detected *** double free or corruption (!prev) in cleanup function
On Thu, Apr 22, 2010 at 05:47, Andrej van der Zee
andrejvander...@gmail.com wrote:
Hi,
I have a question about apr_pool_cleanup_register for a child's pool.
I register a cleanup function that is called when the pool is
destroyed. In the cleanup function, I join a background thread that
first writes some log to a database:
static void mbrace_child_init(apr_pool_t *pool, server_rec *s)
{
apr_pool_cleanup_register(pool, 0, mbrace_bgthread_cleanup,
apr_pool_cleanup_null);
}
static apr_status_t mbrace_bgthread_cleanup(void*)
{
req_log_mngr-stop()
}
But, when it connects to the database in the background thread, it
sometimes ends up in the error below. I do not fully understand why,
but are there any restrictions to what I can do in the cleanup
function?
When running gdb on the generated core-dump, you can see that it
happens on line 134.
125 APR_DECLARE(void) apr_allocator_destroy(apr_allocator_t *allocator)
126 {
127 apr_uint32_t index;
128 apr_memnode_t *node, **ref;
129
130 for (index = 0; index MAX_INDEX; index++) {
131 ref = allocator-free[index];
132 while ((node = *ref) != NULL) {
133 *ref = node-next;
134 free(node); here it happens!!
135 }
136 }
137
138 free(allocator);
139 }
Hopefully somebody can push me in the right direction.
Do you create a background thread per apache process? Or do you have a
single background thread that is used by all apache processes? Which
hook creates the background thread?
It is possible that you create the thread once but you try to join it
several times. I don't know if this is sufficient to get the symptoms
that you see.
Try compiling both apache and apr with debug symbols and run it in a
debugger with -X (i.e. monoprocess). Place a breakpoint on line 134
and see how many times you reach it.
S
Re: Issuing a client side HTTP request from a module
On Wed, Apr 21, 2010 at 22:51, Nick Kew n...@apache.org wrote: On 21 Apr 2010, at 20:42, Some Guy wrote: Hi all, Is there any facility in the Apache libs that allows module developers to act as a client? The usual way would be to harness mod_proxy, commonly in a subrequest. You don't have to do anything special, just request something configured to proxy. As Nick says, the common solution are subrequests. However, note that subrequests are not kept alive. S
Re: Issuing a client side HTTP request from a module
On 22 Apr 2010, at 08:25, Sorin Manolache wrote: As Nick says, the common solution are subrequests. However, note that subrequests are not kept alive. Backend connections may be kept alive or closed, as detailed in the mod_proxy docs! If you want to implement keepalive without mod_proxy, that's a lot of wheel to reinvent. -- Nick Kew
Re: *** glibc detected *** double free or corruption (!prev) in cleanup function
On 4/22/2010 1:09 PM, Andrej van der Zee wrote: Hi, This and try running httpd through valgrind. How can I do that? Thanks, Andrej http://lmgtfy.com/?q=apache+httpd+valgrind
Re: *** glibc detected *** double free or corruption (!prev) in cleanup function
Hi Bronto, http://lmgtfy.com/?q=apache+httpd+valgrind Thank you for the tip :) You are funny! Cheers, Andrej
Re: *** glibc detected *** double free or corruption (!prev) in cleanup function
On 4/22/2010 1:46 PM, Andrej van der Zee wrote: Hi Bronto, http://lmgtfy.com/?q=apache+httpd+valgrind Thank you for the tip :) You are funny! Cheers, Andrej Hi, yeah, i didn't mean no offense. I just thought that it's rather a FAQ ;)
Re: Issuing a client side HTTP request from a module
I don't really need keepalive. Just a really basic http request. However, this would be in a non request handler thread, so I'll have no initial request_rec to create a subrequest from. It would also be in the parent process via a monitor hook. I see the mod_proxy create_worker and initialize_worker, but the latter call requires a server_rec, which I won't have. SB On Thu, Apr 22, 2010 at 3:48 AM, Nick Kew n...@apache.org wrote: On 22 Apr 2010, at 08:25, Sorin Manolache wrote: As Nick says, the common solution are subrequests. However, note that subrequests are not kept alive. Backend connections may be kept alive or closed, as detailed in the mod_proxy docs! If you want to implement keepalive without mod_proxy, that's a lot of wheel to reinvent. -- Nick Kew
Re: Issuing a client side HTTP request from a module
On 22 Apr 2010, at 15:14, Some Guy wrote: I don't really need keepalive. Just a really basic http request. However, this would be in a non request handler thread, so I'll have no initial request_rec to create a subrequest from. It would also be in the parent process via a monitor hook. In that case, you're probably the exception to the general advice to use mod_proxy. Simplest would probably be DIY with your choice of HTTP client library. -- Nick Kew
My own module and catching Proxy Request
Hello *,
I hope that I am sending those question to the correct discussion list.
In my Apache2 (2.2.3) configuration file I have:
VirtualHost _default_:443
SSLEngine on
DocumentRoot /opt/apache/htdocs/ssldocs
ProxyPass /PAC/ http://192.168.187.101:8080/PACCBAdmin
ProxyPassReverse/PAC/ http://192.168.187.150:8080/PACCBAdmin/
RewriteEngine on
RewriteCond %{REQUEST_METHOD} ^TRACE
RewriteRule .* - [F]
RewriteMap unity txt:/opt/apache/conf/unity.map
RewriteRule ^/([^/]+)$ ${unity:$1|/$1} [L]
RewriteRule ^/([^/]+)/(.*) ${unity:$1|/opt/apache/htdocs/ssldocs/$1}/$2 [L]
RewriteLog /var/log/apache2/rewrite_log
RewriteLogLevel 3
Location /PAC/
ProxyPassReverseCookiePath /PACCBAdmin /PAC
Order Allow,Deny
Allow from all
/Location
/VirtualHost
In the my modules which takes care about AAA, Security issues, etc.
I would like to catch in my module when URL contains /PAC/ (which means that
this is proxy) than it tell to module that this request is not a bussiness
for them.
Is it possible to do that somehow?
I have found that r-proxyreq contains if the Request is Proxy or not.
Thank you in advance
--
Best Regards / S pozdravem
Petr Hracek
Re: Oxygen icons for Apache
On Wednesday 21 April 2010 23:24:57 Javier Llorente wrote: Here's a more detailed explanation of my situation: I have hand picked some Oxygen icons, adapted (modified) some Oxygen and Crystal icons, and created the configuration README. The Oxygen icons are under both LGPL and CC-by-SA Quoting http://creativecommons.org/licenses/by-sa/3.0/ [...] Share Alike — If you alter, transform, or build upon this work, you may distribute the resulting work only under the same, similar or a compatible license. It seems to me that the cc-by-sa is ok in this case. I could re-license my collection to have it under the Apache license. The Crystal icons are under the LGPL (only, no dual licensing from what I've read). So I understand that here lies the problem. I could look for a solution like replacing them (they're just a few). Another possibility could be having distributions (if they choose to do so) shipping Apache with this collection of icons enabled by default. But I prefer contributing my grain of salt upstream so that anyone can use it, regardless of the distribution. BTW, thanks a lot for you explanation on licensing :) I have just talked with Pinheiro and he told me that the Oxygen icons are no longer dual-licensed. They're under the LGPL only, so they cannot be part of Apache. However, distributions can still make them the default icons. That's good enough :) Greetings, -- Javier Llorente signature.asc Description: This is a digitally signed message part.
Re: svn commit: r937055 - in /httpd/httpd/trunk/docs/manual/mod: mod_ratelimit.html.en mod_ratelimit.xml
On Thu, Apr 22, 2010 at 4:51 PM, rbo...@apache.org wrote: Author: rbowen Date: Thu Apr 22 20:51:56 2010 New Revision: 937055 URL: http://svn.apache.org/viewvc?rev=937055view=rev Log: Working example configuration, thanks to Paul. Modified: httpd/httpd/trunk/docs/manual/mod/mod_ratelimit.html.en httpd/httpd/trunk/docs/manual/mod/mod_ratelimit.xml Modified: httpd/httpd/trunk/docs/manual/mod/mod_ratelimit.xml URL: http://svn.apache.org/viewvc/httpd/httpd/trunk/docs/manual/mod/mod_ratelimit.xml?rev=937055r1=937054r2=937055view=diff == --- httpd/httpd/trunk/docs/manual/mod/mod_ratelimit.xml (original) +++ httpd/httpd/trunk/docs/manual/mod/mod_ratelimit.xml Thu Apr 22 20:51:56 2010 -example +exampletitleExample Configufation/title Configuwation would have been more cute.
Re: Issuing a client side HTTP request from a module
Wow that looks pretty straightforward. Can this be issued from the parent? SB On Thu, Apr 22, 2010 at 4:21 PM, alin vasile alinachegal...@yahoo.comwrote: check the thread Doing a subrequest with ap_run_sub_req in the same list From: Some Guy teknos...@gmail.com To: modules-...@httpd.apache.org Sent: Thu, April 22, 2010 5:14:07 PM Subject: Re: Issuing a client side HTTP request from a module I don't really need keepalive. Just a really basic http request. However, this would be in a non request handler thread, so I'll have no initial request_rec to create a subrequest from. It would also be in the parent process via a monitor hook. I see the mod_proxy create_worker and initialize_worker, but the latter call requires a server_rec, which I won't have. SB On Thu, Apr 22, 2010 at 3:48 AM, Nick Kew n...@apache.org wrote: On 22 Apr 2010, at 08:25, Sorin Manolache wrote: As Nick says, the common solution are subrequests. However, note that subrequests are not kept alive. Backend connections may be kept alive or closed, as detailed in the mod_proxy docs! If you want to implement keepalive without mod_proxy, that's a lot of wheel to reinvent. -- Nick Kew
HTTP trailers?
I couldn't find any obvious way to set HTTP trailers in Apache 2.x without taking over all response processing (a la nph). Did I miss something? Cheers, -- Mark Nottingham http://www.mnot.net/
Re: HTTP trailers?
Mark, On Apr 22, 2010, at 5:40 PM, Mark Nottingham wrote: I couldn't find any obvious way to set HTTP trailers in Apache 2.x without taking over all response processing (a la nph). Stupid question: what is an HTTP trailer? Is this in the context of Chunked transfer-encoding? S. -- Sander Temme scte...@apache.org PGP FP: 51B4 8727 466A 0BC3 69F4 B7B8 B2BE BC40 1529 24AF
Re: HTTP trailers?
On Apr 22, 2010, at 8:40 PM, Mark Nottingham wrote: I couldn't find any obvious way to set HTTP trailers in Apache 2.x without taking over all response processing (a la nph). Did I miss something? I started hacking on this at work, but got the point where I can't insert a filter in the right spot. The problem I ran into is that if the Content-Length header is set (which ap_content_length_filter_handle sets), then the chunking filter doesn't kick in. Something about wanting to use sendfile so don't chunk. I can't get a filter inserted after ap_content_length_filter_handle, but before ap_http_header_filter (which adds the chunking filter). My plan was to insert a filter that removes the Content-Length header so the response will be chunked and add another filter after the chunking filter that would search for ASCII_ZERO ASCII_CRLF ASCII_CRLF and insert the trailer data before the last ASCII_CRLF. This was just a proof of concept to see if it would work and output data in the right format. If it all worked my plan was add a trailers hook and call the hook in chunk_filter.c in place of the /* trailers */ comment. Brian After typing this up and working through it again, I think I can add a filter AP_FTYPE_TRANSCODE+1 for the after chunking filter and AP_FTYPE_PROTOCOL+1 and get them to be in the right order. Will test that out now.
Re: HTTP trailers?
Yes; see http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.6.1 Cheers, On 23/04/2010, at 11:44 AM, Sander Temme wrote: Mark, On Apr 22, 2010, at 5:40 PM, Mark Nottingham wrote: I couldn't find any obvious way to set HTTP trailers in Apache 2.x without taking over all response processing (a la nph). Stupid question: what is an HTTP trailer? Is this in the context of Chunked transfer-encoding? S. -- Sander Temme scte...@apache.org PGP FP: 51B4 8727 466A 0BC3 69F4 B7B8 B2BE BC40 1529 24AF -- Mark Nottingham http://www.mnot.net/
