[njs] Skip empty buffers in HTTP response send().

[Roman Arutyunyan]

details:   http://hg.nginx.org/njs/rev/c86a0cc40ce5
branches:  
changeset: 454:c86a0cc40ce5
user:      Roman Arutyunyan <arut at nginx.com>
date:      Wed Feb 28 19:16:25 2018 +0300
description:
Skip empty buffers in HTTP response send().

Such buffers lead to send errors and should never be sent.

diffstat:

 nginx/ngx_http_js_module.c |  4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diffs (14 lines):

diff -r ab1f67b69707 -r c86a0cc40ce5 nginx/ngx_http_js_module.c
--- a/nginx/ngx_http_js_module.c	Wed Feb 28 16:20:11 2018 +0300
+++ b/nginx/ngx_http_js_module.c	Wed Feb 28 19:16:25 2018 +0300
@@ -891,6 +891,10 @@ ngx_http_js_ext_send(njs_vm_t *vm, njs_v
                 return NJS_ERROR;
             }
 
+            if (s.length == 0) {
+                continue;
+            }
+
             /* TODO: njs_value_release(vm, value) in buf completion */
 
             ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,