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]