/*
TODO:
- to compile:
apxs -c mod_myoutfilter.c
- copy mod_myoutfilter.so to $APACHE_HOME/modules
- httpd.conf implementation:
LoadModule myoutfilter_module modules/mod_myoutfilter.so
Location /myfile.html
SetOutputFilter myoutfilter
/Location
myfile.html:
bthis is content/b
after filtered:
XMP%START%
%DATA%
bthis is content/b
%/DATA%
%/END%/XMP
*/
#include httpd.h
#include http_config.h
#include apr_buckets.h
#include util_filter.h
#include apr_strings.h
//---
static const char module_name[] = myoutfilter;
module AP_MODULE_DECLARE_DATA myoutfilter_module;
//---
void write_brigade(apr_bucket_brigade *bb_out,request_rec *r,char *data){
APR_BRIGADE_INSERT_TAIL(
bb_out,
apr_bucket_pool_create(
data,
strlen(data),
r-pool,
r-connection-bucket_alloc
)
);
}
//---
static apr_status_t out_filter(ap_filter_t *f,apr_bucket_brigade *bb_in){
apr_bucket *bucket_in;
apr_bucket_brigade *bb_out;
request_rec *r = f-r;
conn_rec *c = r-connection;
apr_pool_t *p = r-pool;
const char *data_in;
apr_size_t len_in;
int decision = 0;
//--- example if we just do nothing
//--- do something to set 'decision' to true(1) or false(0)
if(decision){
ap_remove_output_filter(f);
return ap_pass_brigade(f-next, bb_in);
}
bb_out = apr_brigade_create(p, c-bucket_alloc);
//--- maybe we want write HTML header
write_brigade(bb_out,r,XMP);
write_brigade(bb_out,r,%START%\n\n);
while(!APR_BRIGADE_EMPTY(bb_in)){
bucket_in = APR_BRIGADE_FIRST(bb_in);
//--- if FLUSH requested ? I don't really know when, just follow other
sample.
//--- maybe you need it.
/* --
if (APR_BUCKET_IS_FLUSH(bucket_in)){
APR_BRIGADE_INSERT_TAIL(bb_out,
apr_bucket_flush_create(c-bucket_alloc));
if (ap_pass_brigade(f-next, bb_out) != APR_SUCCESS){return APR_SUCCESS;}
bb_out = apr_brigade_create(p, c-bucket_alloc);
continue;
}
-- */
if (APR_BUCKET_IS_EOS(bucket_in)){
//--- do we want do something when we know there is no data anymore ?
break;
}
// fetch the data
apr_bucket_read(bucket_in, data_in, len_in, APR_BLOCK_READ);
//--- do something with data_in
write_brigade(bb_out,r,%DATA%\n);
write_brigade(bb_out,r,apr_pstrdup(p,data_in));
write_brigade(bb_out,r,\n%/DATA%\n );
//--- end fetch
apr_bucket_delete(bucket_in);
}
//-- we don't need bb_in anymore
apr_brigade_destroy(bb_in);
//--- maybe we want write HTML footer
write_brigade(bb_out,r,\n%/END%);
write_brigade(bb_out,r,/XMP);
//--- send EOS to bb_out to finish inserting data to bb_out
APR_BRIGADE_INSERT_TAIL(bb_out,apr_bucket_eos_create(c-bucket_alloc));
//--- pass bb_out to next filter
ap_remove_output_filter(f);
return ap_pass_brigade(f-next, bb_out);
}
//---
static void register_hooks(apr_pool_t *p){
ap_register_output_filter(module_name, out_filter, NULL,
AP_FTYPE_CONTENT_SET);
}
//---
module AP_MODULE_DECLARE_DATA myoutfilter_module = {
STANDARD20_MODULE_STUFF,
NULL, /* dir config creater */
NULL, /* dir merger --- default is to override
*/
NULL, /* server config */
NULL, /* merge server config */
NULL, /* command table */
register_hooks/* register hooks */
};
//--
note:
hope you understand this code
hope this code work for you
sorry for my bad english
asw,
Indonesia
- Original Message -
From: Zvi Kave [EMAIL PROTECTED]
To: modules-dev@httpd.apache.org
Sent: Wednesday, August 08, 2007 08:58
Subject: Apache 2.2 Output Filter simple C example
Dear friends,
I need an simple apache 2.2 example in C that let's me check the output
characters to manipulate them.
Please help,
Zvi
