bugfix: header_filter_by_lua*: now we ensure we always forward the exact return value of the ngx_http_filter_finalize_request() calls.

Author: agentzh

src/ngx_http_lua_headerfilterby.c

@@ -143,13 +143,8 @@ ngx_http_lua_header_filter_by_chunk(lua_State *L, ngx_http_request_t *r)
 
         dd("finalize request with %d", (int) ctx->exit_code);
 
-        rc = ngx_http_filter_finalize_request(r, &ngx_http_lua_module,
-                                              ctx->exit_code);
-        if (rc == NGX_ERROR || rc == NGX_AGAIN) {
-            return rc;
-        }
-
-        return NGX_DECLINED;
+        return ngx_http_filter_finalize_request(r, &ngx_http_lua_module,
+                                                ctx->exit_code);
     }
 
     return NGX_OK;
@@ -277,6 +272,10 @@ ngx_http_lua_header_filter(ngx_http_request_t *r)
 
     ctx->context = old_context;
 
+    if (r->filter_finalize) {
+        return rc;
+    }
+
     if (rc == NGX_DECLINED) {
         return NGX_OK;
     }