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changeset 2907:4f5753877376

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limit_rate_after
author Igor Sysoev <igor@sysoev.ru>
date Tue, 02 Jun 2009 14:01:50 +0000
parents 97693137d636
children 234a8248812c
files src/http/ngx_http_core_module.c src/http/ngx_http_core_module.h src/http/ngx_http_write_filter_module.c
diffstat 3 files changed, 32 insertions(+), 3 deletions(-) [+]
line wrap: on
line diff
--- a/src/http/ngx_http_core_module.c
+++ b/src/http/ngx_http_core_module.c
@@ -433,6 +433,14 @@ static ngx_command_t  ngx_http_core_comm
       offsetof(ngx_http_core_loc_conf_t, limit_rate),
       NULL },
 
+    { 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_LOC_CONF_OFFSET,
+      offsetof(ngx_http_core_loc_conf_t, limit_rate_after),
+      NULL },
+
     { ngx_string("keepalive_timeout"),
       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE12,
       ngx_http_core_keepalive,
@@ -2924,6 +2932,7 @@ ngx_http_core_create_loc_conf(ngx_conf_t
     lcf->send_lowat = NGX_CONF_UNSET_SIZE;
     lcf->postpone_output = NGX_CONF_UNSET_SIZE;
     lcf->limit_rate = NGX_CONF_UNSET_SIZE;
+    lcf->limit_rate_after = NGX_CONF_UNSET_SIZE;
     lcf->keepalive_timeout = NGX_CONF_UNSET_MSEC;
     lcf->keepalive_header = NGX_CONF_UNSET;
     lcf->keepalive_requests = NGX_CONF_UNSET_UINT;
@@ -3123,6 +3132,8 @@ ngx_http_core_merge_loc_conf(ngx_conf_t 
     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,
--- a/src/http/ngx_http_core_module.h
+++ b/src/http/ngx_http_core_module.h
@@ -324,6 +324,7 @@ struct ngx_http_core_loc_conf_s {
     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 */
 
     ngx_msec_t    client_body_timeout;     /* client_body_timeout */
--- a/src/http/ngx_http_write_filter_module.c
+++ b/src/http/ngx_http_write_filter_module.c
@@ -46,7 +46,7 @@ ngx_module_t  ngx_http_write_filter_modu
 ngx_int_t
 ngx_http_write_filter(ngx_http_request_t *r, ngx_chain_t *in)
 {
-    off_t                      size, sent, limit;
+    off_t                      size, sent, nsent, limit;
     ngx_uint_t                 last, flush;
     ngx_msec_t                 delay;
     ngx_chain_t               *cl, *ln, **ll, *chain;
@@ -210,7 +210,8 @@ ngx_http_write_filter(ngx_http_request_t
     }
 
     if (r->limit_rate) {
-        limit = r->limit_rate * (ngx_time() - r->start_sec + 1) - c->sent;
+        limit = r->limit_rate * (ngx_time() - r->start_sec + 1)
+                - (c->sent - clcf->limit_rate_after);
 
         if (limit <= 0) {
             c->write->delayed = 1;
@@ -245,7 +246,23 @@ ngx_http_write_filter(ngx_http_request_t
     }
 
     if (r->limit_rate) {
-        delay = (ngx_msec_t) ((c->sent - sent) * 1000 / r->limit_rate + 1);
+
+        nsent = c->sent;
+
+        if (clcf->limit_rate_after) {
+
+            sent -= clcf->limit_rate_after;
+            if (sent < 0) {
+                sent = 0;
+            }
+
+            nsent -= clcf->limit_rate_after;
+            if (nsent < 0) {
+                nsent = 0;
+            }
+        }
+
+        delay = (ngx_msec_t) ((nsent - sent) * 1000 / r->limit_rate + 1);
 
         if (delay > 0) {
             c->write->delayed = 1;