[nginx] Upstream: implemented $upstream_bytes_sent.

[Ruslan Ermilov]

details:   https://hg.nginx.org/nginx/rev/e573d74299a0
branches:  
changeset: 7429:e573d74299a0
user:      Ruslan Ermilov <ru at nginx.com>
date:      Thu Dec 13 17:23:07 2018 +0300
description:
Upstream: implemented $upstream_bytes_sent.

diffstat:

 src/http/ngx_http_upstream.c |  15 +++++++++++++++
 src/http/ngx_http_upstream.h |   1 +
 2 files changed, 16 insertions(+), 0 deletions(-)

diffs (57 lines):

diff -r cbc5dee8d5d2 -r e573d74299a0 src/http/ngx_http_upstream.c
--- a/src/http/ngx_http_upstream.c	Tue Dec 11 19:41:22 2018 +0300
+++ b/src/http/ngx_http_upstream.c	Thu Dec 13 17:23:07 2018 +0300
@@ -409,6 +409,10 @@ static ngx_http_variable_t  ngx_http_ups
       ngx_http_upstream_response_length_variable, 1,
       NGX_HTTP_VAR_NOCACHEABLE, 0 },
 
+    { ngx_string("upstream_bytes_sent"), NULL,
+      ngx_http_upstream_response_length_variable, 2,
+      NGX_HTTP_VAR_NOCACHEABLE, 0 },
+
 #if (NGX_HTTP_CACHE)
 
     { ngx_string("upstream_cache_status"), NULL,
@@ -4136,6 +4140,10 @@ ngx_http_upstream_next(ngx_http_request_
 
     if (u->peer.sockaddr) {
 
+        if (u->peer.connection) {
+            u->state->bytes_sent = u->peer.connection->sent;
+        }
+
         if (ft_type == NGX_HTTP_UPSTREAM_FT_HTTP_403
             || ft_type == NGX_HTTP_UPSTREAM_FT_HTTP_404)
         {
@@ -4319,6 +4327,10 @@ ngx_http_upstream_finalize_request(ngx_h
                                         - u->pipe->preread_size;
             u->state->response_length = u->pipe->read_length;
         }
+
+        if (u->peer.connection) {
+            u->state->bytes_sent = u->peer.connection->sent;
+        }
     }
 
     u->finalize_request(r, rc);
@@ -5502,6 +5514,9 @@ ngx_http_upstream_response_length_variab
         if (data == 1) {
             p = ngx_sprintf(p, "%O", state[i].bytes_received);
 
+        } else if (data == 2) {
+            p = ngx_sprintf(p, "%O", state[i].bytes_sent);
+
         } else {
             p = ngx_sprintf(p, "%O", state[i].response_length);
         }
diff -r cbc5dee8d5d2 -r e573d74299a0 src/http/ngx_http_upstream.h
--- a/src/http/ngx_http_upstream.h	Tue Dec 11 19:41:22 2018 +0300
+++ b/src/http/ngx_http_upstream.h	Thu Dec 13 17:23:07 2018 +0300
@@ -64,6 +64,7 @@ typedef struct {
     ngx_msec_t                       queue_time;
     off_t                            response_length;
     off_t                            bytes_received;
+    off_t                            bytes_sent;
 
     ngx_str_t                       *peer;
 } ngx_http_upstream_state_t;