Модуль фильтра Nginx - не получать директивные значения

Question

Я только начинаю писать свой модуль.
Ниже приведен простой модуль фильтра:

static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
static ngx_http_output_body_filter_pt ngx_http_next_body_filter;

typedef struct {
    ngx_str_t   status;
    ngx_str_t   content;
} ngx_http_ds_filter_conf_t;

static ngx_command_t ngx_http_ds_filter_commands[] = {
    {
        ngx_string("dsFilterStatus"),
        NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
        ngx_http_ds_filter,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_ds_filter_conf_t,status),
        NULL
    },
    {
        ngx_string("dsFilterContent"),
        NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
        ngx_http_ds_filter,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_ds_filter_conf_t,content),
        NULL
    },
    ngx_null_command
};

static ngx_int_t ngx_http_ds_header_filter(ngx_http_request_t *r)
{
    ngx_http_ds_filter_conf_t *conf;
    conf = (ngx_http_ds_filter_conf_t*)ngx_http_get_module_loc_conf(r,ngx_http_ds_filter_module);

    if(conf->status.data == (u_char*)"off")
    {
        return ngx_http_next_header_filter(r);
    }
    else
    {
        if(r->headers_out.content_length_n != -1)
        {
            r->headers_out.content_length_n += conf->content.len;
        }
    }

    return ngx_http_next_header_filter(r);
}

static ngx_int_t ngx_http_ds_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
{
    ngx_buf_t *b;
    ngx_chain_t *cl, *nl;
    bool last = false;

    for(cl = in; cl; cl = cl->next)
    {
        if(cl->buf->last_buf)
        {
            last = true;
            break;
        }
    }

    if(!last)
    {
        return ngx_http_next_body_filter(r,in);
    }

    ngx_http_ds_filter_conf_t *conf;

    conf = (ngx_http_ds_filter_conf_t*)ngx_http_get_module_loc_conf(r, ngx_http_ds_filter_module);

    b = (ngx_buf_t*)ngx_calloc_buf(r->pool);

    if(b == NULL)
    {
        return NGX_ERROR;
    }

    b->pos = conf->content.data;
    b->last = b->pos + conf->content.len;
    b->start = b->pos;
    b->end = b->last;
    b->last_buf = 1;
    b->memory = 1;

    if(ngx_buf_size(cl->buf) == 0)
    {
        cl->buf = b;
    }
    else
    {
        nl = ngx_alloc_chain_link(r->pool);
        if(nl == NULL)
        {
            return NGX_ERROR;
        }

        nl->buf = b;
        nl->next = NULL;
        cl->next = nl;
        cl->buf->last_buf = 0;
    }

    return ngx_http_next_body_filter(r, in);
}

static ngx_int_t ngx_http_ds_filter_init(ngx_conf_t *cf)
{
    ngx_http_next_header_filter = ngx_http_top_header_filter;
    ngx_http_top_header_filter = ngx_http_ds_header_filter;

    ngx_http_next_body_filter = ngx_http_top_body_filter;
    ngx_http_top_body_filter = ngx_http_ds_body_filter;

    return NGX_OK;
}

Мои функции "создать и слить":

static void *ngx_http_ds_filter_create_loc_conf(ngx_conf_t *cf)
{
    ngx_http_ds_filter_conf_t  *conf;

    conf = (ngx_http_ds_filter_conf_t*)ngx_pcalloc(cf->pool, sizeof(ngx_http_ds_filter_conf_t));

    if(conf == NULL)
    {
        return NULL;
    }

    conf->content.len = 0;
    conf->content.data = NULL;
    conf->status.len = 0;
    conf->status.data = NULL;

    return conf;
}

static char *ngx_http_ds_filter_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
{
    ngx_http_ds_filter_conf_t *prev = (ngx_http_ds_filter_conf_t*)parent;
    ngx_http_ds_filter_conf_t *conf = (ngx_http_ds_filter_conf_t*)child;

    ngx_conf_merge_str_value(conf->status, prev->status, "NADA");
    ngx_conf_merge_str_value(conf->content,prev->content,"NJET");

    return NGX_CONF_OK;
}

Как вы можете видеть в приведенном выше коде, я просто добавляю "conf->content.data" в буфер как значение.

С такой конфигурацией, как:

dsFilterStatus on;
dsFilterContent Hello;

показывающий результат - "NJET".

Я не знаю почему?

Было бы здорово, если бы кто-нибудь сказал мне, что я делаю не так.

Спасибо