update for subrequest microservice, nginx link function will ignore the response status & content, but it's keeping the headers content to communicate the service per request based

headers will merge by request and subrequest

Author: cdgwoon

src/ngx_link_func_module.c

@@ -1075,19 +1075,23 @@ ngx_http_link_func_after_process(ngx_event_t *ev) {
 static ngx_int_t
 ngx_http_link_func_subreqest_parallel_done(ngx_http_request_t *r, void *data, ngx_int_t rc) {
     ngx_http_link_func_internal_ctx_t   *ctx = data;
+    ngx_uint_t                          status = r->headers_out.status;
+    
     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                   "subrequest parallel done:%ui", r->headers_out.status);
-    if (ctx->subreq_parallel_wait_cnt) {
+                   "subrequest parallel done:%ui", status);
+    if (status) {
         ctx->subreq_parallel_wait_cnt--;
     }
     return rc;
 }
 static ngx_int_t
 ngx_http_link_func_subreqest_sequential_done(ngx_http_request_t *r, void *data, ngx_int_t rc) {
     ngx_http_link_func_internal_ctx_t   *ctx = data;
+    ngx_uint_t                          status = r->headers_out.status;
+
     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                   "subrequest sequential done:%ui", r->headers_out.status);
-    if (ctx->subreq_sequential_wait_cnt) {
+                   "subrequest sequential done:%ui", status);
+    if (status) {
         ctx->subreq_sequential_wait_cnt--;
     }
     return rc;