Re: Intercepting HTTP 301/302 redirects
On 02/29/2012 07:46 PM, Swaminathan Bhaskar wrote:
Thanks for the quick response Joe. Just to make sure, here is what I did:
IfModule mod_myfilter.c
Location /
SetOutputFilter myfilter
/Location
/IfModule
and the code
#include stdio.h
#include httpd.h
#include http_protocol.h
#include http_config.h
#include util_filter.h
#define MY_FILTER_NAME myfilter
static int my_output_filter(ap_filter_t *f, apr_bucket_brigade *bb)
{
fprintf(stderr, mod_myfilter: status = %d, status-line = %s\n,
f-r-status, f-r-status_line);
ap_pass_brigade(f-next, bb);
return APR_SUCCESS;
}
static void my_filter_hooks(apr_pool_t *pool)
{
ap_register_output_filter(MY_FILTER_NAME, my_output_filter, NULL,
AP_FTYPE_RESOURCE);
fprintf(stderr, mod_myfilter: registered my_output_filter\n);
}
module AP_MODULE_DECLARE_DATA myfilter_module = {
STANDARD20_MODULE_STUFF,
NULL,
NULL,
NULL,
NULL,
NULL,
my_filter_hooks
};
I setup an intentional redirect for testing
Redirect 301 /red.htm http://localhost/green.htm
When I try http://localhost/, should I not see the output from myfilter ?
Maybe. Remember, errors don't go through the same outputs as regular
responses. If you want to filter the results of anything outside of the
standard 2xx HTTP responses, you have to insert an error filter as well,
hence my reference to ap_hook_insert_error_filter(). As an example
(borrowed from some of my source and modified for yours) :
static void insert_my_output_error_filter(request_rec *r) {
ap_add_output_filter(MY_FILTER_NAME,NULL,r,r-connection);
}
static void my_filter_hooks(apr_pool_t *p) {
ap_hook_insert_error_filter(insert_my_output_error_filter, NULL,
NULL, APR_HOOK_LAST);
ap_register_output_filter(MY_FILTER_NAME,my_output_filter,NULL,AP_FTYPE_RESOURCE);
};
Again, output filters and errors do not coincide. If you want to catch
both, you have to hook both. (Same thing for r-headers_out and
r-err_headers_out - r-headers_out won't make it into r-err_headers_out).
Joe
--
http://www.silverhawk.net
Re: Intercepting HTTP 301/302 redirects
Ahh - Finally, I was able to get it working. Thanks for the pointer.
Here is the code snippet:
#include stdio.h
#include httpd.h
#include http_protocol.h
#include http_config.h
#include http_log.h
#include util_filter.h
#define MY_FILTER_NAME myfilter
static void insert_myfilter(request_rec *req)
{
ap_add_output_filter(MY_FILTER_NAME, NULL, req, req-connection);
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, req-server, mod_myfilter:
inserted myfilter);
}
static int my_output_filter(ap_filter_t *f, apr_bucket_brigade *bb)
{
if (f-r-status_line != NULL) {
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, f-r-server,
mod_myfilter: status = %d, status-line = %s, f-r-status,
f-r-status_line);
}
else {
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, f-r-server,
mod_myfilter: status = %d, f-r-status);
}
ap_pass_brigade(f-next, bb);
return APR_SUCCESS;
}
static void my_filter_hooks(apr_pool_t *pool)
{
ap_register_output_filter(MY_FILTER_NAME, my_output_filter, NULL,
AP_FTYPE_RESOURCE);
ap_hook_insert_filter(insert_myfilter, NULL, NULL, APR_HOOK_LAST);
ap_hook_insert_error_filter(insert_myfilter, NULL, NULL, APR_HOOK_LAST);
fprintf(stderr, mod_myfilter: registered my_output_filter\n);
}
module AP_MODULE_DECLARE_DATA myfilter_module = {
STANDARD20_MODULE_STUFF,
NULL,
NULL,
NULL,
NULL,
NULL,
my_filter_hooks
};
Rgds
Bhaskar
--
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Re: Intercepting HTTP 301/302 redirects
Congrats! Welcome to the world of filters!
On 03/01/2012 09:37 AM, Swaminathan Bhaskar wrote:
Ahh - Finally, I was able to get it working. Thanks for the pointer.
Here is the code snippet:
#includestdio.h
#includehttpd.h
#includehttp_protocol.h
#includehttp_config.h
#includehttp_log.h
#includeutil_filter.h
#define MY_FILTER_NAME myfilter
static void insert_myfilter(request_rec *req)
{
ap_add_output_filter(MY_FILTER_NAME, NULL, req, req-connection);
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, req-server, mod_myfilter:
inserted myfilter);
}
static int my_output_filter(ap_filter_t *f, apr_bucket_brigade *bb)
{
if (f-r-status_line != NULL) {
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, f-r-server,
mod_myfilter: status = %d, status-line = %s, f-r-status,
f-r-status_line);
}
else {
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, f-r-server,
mod_myfilter: status = %d, f-r-status);
}
ap_pass_brigade(f-next, bb);
return APR_SUCCESS;
}
static void my_filter_hooks(apr_pool_t *pool)
{
ap_register_output_filter(MY_FILTER_NAME, my_output_filter, NULL,
AP_FTYPE_RESOURCE);
ap_hook_insert_filter(insert_myfilter, NULL, NULL, APR_HOOK_LAST);
ap_hook_insert_error_filter(insert_myfilter, NULL, NULL, APR_HOOK_LAST);
fprintf(stderr, mod_myfilter: registered my_output_filter\n);
}
module AP_MODULE_DECLARE_DATA myfilter_module = {
STANDARD20_MODULE_STUFF,
NULL,
NULL,
NULL,
NULL,
NULL,
my_filter_hooks
};
Rgds
Bhaskar
Re: thread ID
On Thu, Mar 1, 2012 at 17:29, sorin.manola...@orange.com wrote: Hello, I would need a memory buffer associated per worker thread (in the worker MPM) or to each process (in the prefork MPM). In order to do that, I would need a map thread-buffer. So, I would need a sort of thread ID/key/handle that stays the same during the lifetime of the thread and no two threads in the same process can have the same ID/key/handle. What is the most portable way to get this thread ID? I thought of r-connection-id. It works but it is not very portable as it is not guaranteed that two connections created by the same thread will have the same id. They do for now. If r-connection-sbh was not opaque it would be great, because sbh-thread_num would be exactly what I need. I could also use pthread_self. It works too but, in general, it is not guaranteed that the worker threads are pthreads. Thank you for your help. Sorin What about apr_os_thread_current()? It returns a opaque value that's a pthread_t on Unices and a pseudo-HANDLE on Windows. Read this[1] to understand what that means. As a recovering standards lawyer I should probably point out that pthread_t is an opaque type that's not guaranteed to be convertible to a numeric value (or to anything, really). That said, I've never seen a pthreads implementation where that wasn't the case. [1] http://msdn.microsoft.com/en-us/library/windows/desktop/ms683182%28v=vs.85%29.aspx
Re: thread ID
On 03/02/12 00:21, Ben Noordhuis wrote: On Thu, Mar 1, 2012 at 17:29,sorin.manola...@orange.com wrote: Hello, I would need a memory buffer associated per worker thread (in the worker MPM) or to each process (in the prefork MPM). In order to do that, I would need a map thread-buffer. So, I would need a sort of thread ID/key/handle that stays the same during the lifetime of the thread and no two threads in the same process can have the same ID/key/handle. What is the most portable way to get this thread ID? I thought of r-connection-id. It works but it is not very portable as it is not guaranteed that two connections created by the same thread will have the same id. They do for now. If r-connection-sbh was not opaque it would be great, because sbh-thread_num would be exactly what I need. I could also use pthread_self. It works too but, in general, it is not guaranteed that the worker threads are pthreads. Thank you for your help. Sorin What about apr_os_thread_current()? It returns a opaque value that's a pthread_t on Unices and a pseudo-HANDLE on Windows. Read this[1] to understand what that means. As a recovering standards lawyer I should probably point out that pthread_t is an opaque type that's not guaranteed to be convertible to a numeric value (or to anything, really). That said, I've never seen a pthreads implementation where that wasn't the case. [1] http://msdn.microsoft.com/en-us/library/windows/desktop/ms683182%28v=vs.85%29.aspx Thank you, it's what I need. Sorin
How to read PHP session in module
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