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From Swaminathan Bhaskar <bhaskar.swaminat...@gmx.com>
Subject Re: Intercepting HTTP 301/302 redirects
Date Thu, 01 Mar 2012 16:37:15 GMT

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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