limit_rate_after support variables

[Miroslav Novy]

Hi Ruslan,
  there is my fix to remove warning "using uninitialized variable".

I have moved the reading value of limit_rate variable from function
ngx_http_update_location_config to function ngx_http_write_filter
because value is initialized later.

Best regards
Miroslav Nový

# HG changeset patch
# User Miroslav Nový <miranovy at gmail.com>
# Date 1542811768 0
#      Wed Nov 21 14:49:28 2018 +0000
# Node ID e2139cd62c7263dc182b11a847a6eaf2d9560a0d
# Parent  82eed7650622fd780dcd4a86661de7b80b44199c
Variables support in limit_rate and limit_rate_after fix

Reading value of limit_rate variable moved to function
ngx_http_write_filter because in function
ngx_http_update_location_config is not inicialized yet.

diff -r 82eed7650622 -r e2139cd62c72 src/http/ngx_http_core_module.c
--- a/src/http/ngx_http_core_module.c Wed Nov 21 10:40:01 2018 +0000
+++ b/src/http/ngx_http_core_module.c Wed Nov 21 14:49:28 2018 +0000
@@ -1212,8 +1212,6 @@
 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);
@@ -1283,20 +1281,6 @@
         r->connection->tcp_nopush = NGX_TCP_NOPUSH_DISABLED;
     }

-    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) {
         r->content_handler = clcf->handler;
     }
diff -r 82eed7650622 -r e2139cd62c72 src/http/ngx_http_write_filter_module.c
--- a/src/http/ngx_http_write_filter_module.c Wed Nov 21 10:40:01 2018 +0000
+++ b/src/http/ngx_http_write_filter_module.c Wed Nov 21 14:49:28 2018 +0000
@@ -48,7 +48,7 @@
 ngx_http_write_filter(ngx_http_request_t *r, ngx_chain_t *in)
 {
     off_t                      size, sent, nsent, limit;
-    size_t                     limit_rate_after;
+    ssize_t                    limit_rate, limit_rate_after;
     ngx_str_t                  val;
     ngx_uint_t                 last, flush, sync;
     ngx_msec_t                 delay;
@@ -220,6 +220,25 @@
         return NGX_ERROR;
     }

+    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_after != NGX_ERROR) {
+             r->limit_rate = limit_rate;
+
+         } else if (val.len) {
+             ngx_log_error(NGX_LOG_ERR, c->log, 0,
+                           "invalid \"limit_rate\" value \"%V\"",
+                           &val);
+         }
+     }
+
+     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, "http limit rate \"%z\"",
+                           r->limit_rate);
+
     if (r->limit_rate) {
         if (r->limit_rate_after == 0
             && clcf->limit_rate_after
@@ -227,7 +246,7 @@
                                            &limit_rate_after)
                == NGX_OK)
         {
-            if (limit_rate_after != (size_t) NGX_ERROR) {
+            if (limit_rate_after != NGX_ERROR) {
                 r->limit_rate_after = limit_rate_after;

             } else if (val.len) {