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Re: limit_rate_after support variables

November 20, 2018 09:12AM
Hi Miroslav,

On Wed, Oct 17, 2018 at 12:49:13PM +0200, Miroslav Novy wrote:
> Hello,
>
> I prepare patch on actual sources. Settings limit_rate and limit_rate_after
> works good. Please make code review, our testing and merge to main branche.
> Thank you
> Miroslav Nový
>
> Example of configration:
> location / {
> root /var/www/default/;
> index index.html index.htm;
>
> set $my_limit_rate 4k;
> set $my_limit_rate_after 4m;
>
> limit_rate $my_limit_rate;
> limit_rate_after $my_limit_rate_after;
>
> access_by_lua_block {
> ngx.var.my_limit_rate = '2k'
> ngx.var.my_limit_rate_after = '10m'
> }
> }

As I wrote on August 29, the patch is pending a code review. The
patch you submitted is garbled by your email client, is somewhat
different from the patch I submitted, also the while patch series
became a single patch.

I've updated my version of the patch series. You can help with the
code review and testing, if you like:

# HG changeset patch
# User Ruslan Ermilov <ru@nginx.com>
# Date 1542721399 -10800
# Tue Nov 20 16:43:19 2018 +0300
# Node ID 9926926b9d63c8cc9779877cb6c0f5e64193f1a8
# Parent 650574a445058a0ed9e9a83c29183a7bc13e85ba
Added post processing to ngx_http_set_complex_value_slot().

diff --git a/src/http/ngx_http_script.c b/src/http/ngx_http_script.c
--- a/src/http/ngx_http_script.c
+++ b/src/http/ngx_http_script.c
@@ -214,6 +214,7 @@ ngx_http_set_complex_value_slot(ngx_conf
char *p = conf;

ngx_str_t *value;
+ ngx_conf_post_t *post;
ngx_http_complex_value_t **cv;
ngx_http_compile_complex_value_t ccv;

@@ -240,6 +241,11 @@ ngx_http_set_complex_value_slot(ngx_conf
return NGX_CONF_ERROR;
}

+ if (cmd->post) {
+ post = cmd->post;
+ return post->post_handler(cf, post, *cv);
+ }
+
return NGX_CONF_OK;
}

# HG changeset patch
# User Ruslan Ermilov <ru@nginx.com>
# Date 1542721408 -10800
# Tue Nov 20 16:43:28 2018 +0300
# Node ID cb171b06b70daa8ab230924eafa152fa28870cb5
# Parent 9926926b9d63c8cc9779877cb6c0f5e64193f1a8
Added size_t type support to ngx_http_set_complex_value_slot().

If a complex value is expected to be size_t, and the compiled value
is constant, the ngx_http_complex_value_size_p post handler will
remember the constant size_t value.

The value is accessed through ngx_http_complex_value_size() which
either returns the remembered constant or evaluates the expression
and parses it as size_t.

diff --git a/src/http/ngx_http_script.c b/src/http/ngx_http_script.c
--- a/src/http/ngx_http_script.c
+++ b/src/http/ngx_http_script.c
@@ -10,6 +10,13 @@
#include <ngx_http.h>


+static char *ngx_http_complex_value_set_size(ngx_conf_t *cf, void *post,
+ void *data);
+
+ngx_conf_post_handler_pt ngx_http_complex_value_size_p =
+ ngx_http_complex_value_set_size;
+
+
static ngx_int_t ngx_http_script_init_arrays(ngx_http_script_compile_t *sc);
static ngx_int_t ngx_http_script_done(ngx_http_script_compile_t *sc);
static ngx_int_t ngx_http_script_add_copy_code(ngx_http_script_compile_t *sc,
@@ -105,6 +112,25 @@ ngx_http_complex_value(ngx_http_request_


ngx_int_t
+ngx_http_complex_value_size(ngx_http_request_t *r,
+ ngx_http_complex_value_t *val, ngx_str_t *value, size_t *size)
+{
+ if (val->lengths == NULL) {
+ *size = val->u.size;
+ return NGX_OK;
+ }
+
+ if (ngx_http_complex_value(r, val, value) != NGX_OK) {
+ return NGX_ERROR;
+ }
+
+ *size = ngx_parse_size(value);
+
+ return NGX_OK;
+}
+
+
+ngx_int_t
ngx_http_compile_complex_value(ngx_http_compile_complex_value_t *ccv)
{
ngx_str_t *v;
@@ -250,6 +276,24 @@ ngx_http_set_complex_value_slot(ngx_conf
}


+static char *
+ngx_http_complex_value_set_size(ngx_conf_t *cf, void *post, void *data)
+{
+ ngx_http_complex_value_t *cv = data;
+
+ if (cv->lengths) {
+ return NGX_CONF_OK;
+ }
+
+ cv->u.size = ngx_parse_size(&cv->value);
+ if (cv->u.size == (size_t) NGX_ERROR) {
+ return "invalid value";
+ }
+
+ return NGX_CONF_OK;
+}
+
+
ngx_int_t
ngx_http_test_predicates(ngx_http_request_t *r, ngx_array_t *predicates)
{
diff --git a/src/http/ngx_http_script.h b/src/http/ngx_http_script.h
--- a/src/http/ngx_http_script.h
+++ b/src/http/ngx_http_script.h
@@ -68,6 +68,10 @@ typedef struct {
ngx_uint_t *flushes;
void *lengths;
void *values;
+
+ union {
+ size_t size;
+ } u;
} ngx_http_complex_value_t;


@@ -207,6 +211,8 @@ void ngx_http_script_flush_complex_value
ngx_http_complex_value_t *val);
ngx_int_t ngx_http_complex_value(ngx_http_request_t *r,
ngx_http_complex_value_t *val, ngx_str_t *value);
+ngx_int_t ngx_http_complex_value_size(ngx_http_request_t *r,
+ ngx_http_complex_value_t *val, ngx_str_t *value, size_t *size);
ngx_int_t ngx_http_compile_complex_value(ngx_http_compile_complex_value_t *ccv);
char *ngx_http_set_complex_value_slot(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
@@ -254,4 +260,7 @@ void ngx_http_script_var_code(ngx_http_s
void ngx_http_script_nop_code(ngx_http_script_engine_t *e);


+extern ngx_conf_post_handler_pt ngx_http_complex_value_size_p;
+
+
#endif /* _NGX_HTTP_SCRIPT_H_INCLUDED_ */
# HG changeset patch
# User Ruslan Ermilov <ru@nginx.com>
# Date 1542722018 -10800
# Tue Nov 20 16:53:38 2018 +0300
# Node ID 1ab7dc1eb5fca6798e7412401302393023cd1ec6
# Parent cb171b06b70daa8ab230924eafa152fa28870cb5
Variables support in limit_rate and limit_rate_after (ticket #293).

diff --git a/src/http/ngx_http_core_module.c b/src/http/ngx_http_core_module.c
--- a/src/http/ngx_http_core_module.c
+++ b/src/http/ngx_http_core_module.c
@@ -479,18 +479,18 @@ static ngx_command_t ngx_http_core_comm
{ ngx_string("limit_rate"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
|NGX_CONF_TAKE1,
- ngx_conf_set_size_slot,
+ ngx_http_set_complex_value_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_core_loc_conf_t, limit_rate),
- NULL },
+ &ngx_http_complex_value_size_p },

{ ngx_string("limit_rate_after"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
|NGX_CONF_TAKE1,
- ngx_conf_set_size_slot,
+ ngx_http_set_complex_value_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_core_loc_conf_t, limit_rate_after),
- NULL },
+ &ngx_http_complex_value_size_p },

{ ngx_string("keepalive_timeout"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE12,
@@ -1212,6 +1212,8 @@ ngx_http_core_content_phase(ngx_http_req
void
ngx_http_update_location_config(ngx_http_request_t *r)
{
+ size_t limit_rate;
+ ngx_str_t val;
ngx_http_core_loc_conf_t *clcf;

clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
@@ -1281,8 +1283,18 @@ ngx_http_update_location_config(ngx_http
r->connection->tcp_nopush = NGX_TCP_NOPUSH_DISABLED;
}

- if (r->limit_rate == 0) {
- r->limit_rate = clcf->limit_rate;
+ if (r->limit_rate == 0
+ && clcf->limit_rate
+ && ngx_http_complex_value_size(r, clcf->limit_rate, &val, &limit_rate)
+ == NGX_OK)
+ {
+ if (limit_rate != (size_t) NGX_ERROR) {
+ r->limit_rate = limit_rate;
+
+ } else if (val.len) {
+ ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
+ "invalid \"limit_rate\" value \"%V\"", &val);
+ }
}

if (clcf->handler) {
@@ -3362,6 +3374,8 @@ ngx_http_core_create_loc_conf(ngx_conf_t
* clcf->exact_match = 0;
* clcf->auto_redirect = 0;
* clcf->alias = 0;
+ * clcf->limit_rate = NULL;
+ * clcf->limit_rate_after = NULL;
* clcf->gzip_proxied = 0;
* clcf->keepalive_disable = 0;
*/
@@ -3392,8 +3406,6 @@ ngx_http_core_create_loc_conf(ngx_conf_t
clcf->send_timeout = NGX_CONF_UNSET_MSEC;
clcf->send_lowat = NGX_CONF_UNSET_SIZE;
clcf->postpone_output = NGX_CONF_UNSET_SIZE;
- clcf->limit_rate = NGX_CONF_UNSET_SIZE;
- clcf->limit_rate_after = NGX_CONF_UNSET_SIZE;
clcf->keepalive_timeout = NGX_CONF_UNSET_MSEC;
clcf->keepalive_header = NGX_CONF_UNSET;
clcf->keepalive_requests = NGX_CONF_UNSET_UINT;
@@ -3581,6 +3593,14 @@ ngx_http_core_merge_loc_conf(ngx_conf_t
ngx_conf_merge_msec_value(conf->client_body_timeout,
prev->client_body_timeout, 60000);

+ if (conf->limit_rate == NULL) {
+ conf->limit_rate = prev->limit_rate;
+ }
+
+ if (conf->limit_rate_after == NULL) {
+ conf->limit_rate_after = prev->limit_rate_after;
+ }
+
ngx_conf_merge_bitmask_value(conf->keepalive_disable,
prev->keepalive_disable,
(NGX_CONF_BITMASK_SET
@@ -3622,9 +3642,6 @@ ngx_http_core_merge_loc_conf(ngx_conf_t
ngx_conf_merge_size_value(conf->send_lowat, prev->send_lowat, 0);
ngx_conf_merge_size_value(conf->postpone_output, prev->postpone_output,
1460);
- ngx_conf_merge_size_value(conf->limit_rate, prev->limit_rate, 0);
- ngx_conf_merge_size_value(conf->limit_rate_after, prev->limit_rate_after,
- 0);
ngx_conf_merge_msec_value(conf->keepalive_timeout,
prev->keepalive_timeout, 75000);
ngx_conf_merge_sec_value(conf->keepalive_header,
diff --git a/src/http/ngx_http_core_module.h b/src/http/ngx_http_core_module.h
--- a/src/http/ngx_http_core_module.h
+++ b/src/http/ngx_http_core_module.h
@@ -350,13 +350,14 @@ struct ngx_http_core_loc_conf_s {
size_t client_body_buffer_size; /* client_body_buffer_size */
size_t send_lowat; /* send_lowat */
size_t postpone_output; /* postpone_output */
- size_t limit_rate; /* limit_rate */
- size_t limit_rate_after; /* limit_rate_after */
size_t sendfile_max_chunk; /* sendfile_max_chunk */
size_t read_ahead; /* read_ahead */
size_t subrequest_output_buffer_size;
/* subrequest_output_buffer_size */

+ ngx_http_complex_value_t *limit_rate; /* limit_rate */
+ ngx_http_complex_value_t *limit_rate_after; /* limit_rate_after */
+
ngx_msec_t client_body_timeout; /* client_body_timeout */
ngx_msec_t send_timeout; /* send_timeout */
ngx_msec_t keepalive_timeout; /* keepalive_timeout */
diff --git a/src/http/ngx_http_write_filter_module.c b/src/http/ngx_http_write_filter_module.c
--- a/src/http/ngx_http_write_filter_module.c
+++ b/src/http/ngx_http_write_filter_module.c
@@ -48,6 +48,8 @@ ngx_int_t
ngx_http_write_filter(ngx_http_request_t *r, ngx_chain_t *in)
{
off_t size, sent, nsent, limit;
+ size_t limit_rate_after;
+ ngx_str_t val;
ngx_uint_t last, flush, sync;
ngx_msec_t delay;
ngx_chain_t *cl, *ln, **ll, *chain;
@@ -219,8 +221,20 @@ ngx_http_write_filter(ngx_http_request_t
}

if (r->limit_rate) {
- if (r->limit_rate_after == 0) {
- r->limit_rate_after = clcf->limit_rate_after;
+ if (r->limit_rate_after == 0
+ && clcf->limit_rate_after
+ && ngx_http_complex_value_size(r, clcf->limit_rate_after, &val,
+ &limit_rate_after)
+ == NGX_OK)
+ {
+ if (limit_rate_after != (size_t) NGX_ERROR) {
+ r->limit_rate_after = limit_rate_after;
+
+ } else if (val.len) {
+ ngx_log_error(NGX_LOG_ERR, c->log, 0,
+ "invalid \"limit_rate_after\" value \"%V\"",
+ &val);
+ }
}

limit = (off_t) r->limit_rate * (ngx_time() - r->start_sec + 1)
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Subject Author Views Posted

limit_rate_after support variables

Miroslav Novy 338 August 14, 2018 04:24AM

Re: limit_rate_after support variables

ru@nginx.com 75 August 27, 2018 07:30AM

Re: limit_rate_after support variables

Miroslav Novy 99 August 27, 2018 09:38AM

Re: limit_rate_after support variables

ru@nginx.com 80 August 27, 2018 12:02PM

Re: limit_rate_after support variables

Miroslav Novy 70 August 28, 2018 03:24AM

Re: limit_rate_after support variables

ru@nginx.com 69 August 29, 2018 07:44AM

Re: limit_rate_after support variables

Miroslav Novy 87 August 30, 2018 03:02AM

Re: limit_rate_after support variables

Miroslav Novy 66 October 17, 2018 06:50AM

Re: limit_rate_after support variables

ru@nginx.com 40 November 20, 2018 09:12AM

Re: limit_rate_after support variables

Miroslav Novy 36 November 21, 2018 06:12AM

Re: limit_rate_after support variables

Miroslav Novy 48 November 21, 2018 09:52AM

Re: limit_rate_after support variables

ru@nginx.com 39 December 06, 2018 09:46AM

Re: limit_rate_after support variables

Miroslav Novy 45 December 10, 2018 08:32AM

Re: limit_rate_after support variables

Miroslav Nový 17 February 25, 2019 06:08AM

Re: limit_rate_after support variables

ru@nginx.com 21 February 26, 2019 03:00AM



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