не работает фильтр

[o1egus]

Привет.
Хочу написать простейший фильтр, который как то меняет тело ответа. Но почему то моя callback функция ngx_http_pg_body_filter даже не вызывается. Подскажите что не так делаю.

В качестве источников пользовался http://www.evanmiller.org/nginx-modules-guide.html и модулем nginx под названием ngx_http_chunked_filter_module.c

Вот мой модуль.

[code]
#include "pg.h"

#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>

static ngx_int_t ngx_http_pg_filter_init(ngx_conf_t *cf);
static ngx_int_t ngx_http_pg_header_filter(ngx_http_request_t *r);
static ngx_int_t ngx_http_pg_body_filter(ngx_http_request_t *r, ngx_chain_t *in);

static ngx_http_module_t  ngx_http_pg_module_ctx = {
    NULL,                          /* preconfiguration */
    ngx_http_pg_filter_init,       /* postconfiguration */

    NULL,                          /* create main configuration */
    NULL,                          /* init main configuration */

    NULL,                          /* create server configuration */
    NULL,                          /* merge server configuration */

    NULL,  						   /* create location configuration */
    NULL						   /* merge location configuration */
};

ngx_module_t  ngx_http_pg_module = {
    NGX_MODULE_V1,
    &ngx_http_pg_module_ctx, 	   /* module context */
    NULL,		   /* module directives */
    NGX_HTTP_MODULE,               /* module type */
    NULL,                          /* init master */
    NULL,                          /* init module */
    NULL,                          /* init process */
    NULL,                          /* init thread */
    NULL,                          /* exit thread */
    NULL,                          /* exit process */
    NULL,                          /* exit master */
    NGX_MODULE_V1_PADDING
};

static ngx_http_output_header_filter_pt  ngx_http_next_header_filter;
static ngx_http_output_body_filter_pt    ngx_http_next_body_filter;

static ngx_int_t ngx_http_pg_header_filter(ngx_http_request_t *r)
{
    ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,"HELLO HEADER FILTER");
    return ngx_http_next_header_filter(r);
}


static ngx_int_t ngx_http_pg_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
{
    ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,"HELLO BODY FILTER");
    return ngx_http_next_body_filter(r, in);
}

static ngx_int_t ngx_http_pg_filter_init(ngx_conf_t *cf)
{
    ngx_http_next_header_filter = ngx_http_top_header_filter;
    ngx_http_top_header_filter = ngx_http_pg_header_filter;

    ngx_http_next_body_filter = ngx_http_top_body_filter;
    ngx_http_top_body_filter = ngx_http_pg_body_filter;

    return NGX_OK;
}
[/code]

Конфиг.
[code]
daemon off;

worker_processes  1;

events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    keepalive_timeout  65;
    keepalive_requests 100;

server {

        listen       8000;
        server_name  localhost;
	
	location / {
	proxy_pass http://localhost:80;
	}
    }
}

[/code]

Posted at Nginx Forum: http://forum.nginx.org/read.php?21,92624,92624#msg-92624