From: Dmitry Volyntsev <xeioex@nginx.com>
Date: Mon, 20 May 2024 23:44:10 +0000 (-0700)
Subject: HTTP: fixed handling of 0 length request body.
X-Git-Tag: 0.8.5~28
X-Git-Url: http://www.kaiwu.me/postgresql/commit/static/gitweb.js?a=commitdiff_plain;h=74854b6edaa8a76fdc96395cdc7fbdfcd01425b6;p=njs.git

HTTP: fixed handling of 0 length request body.

Previously, when r.requestBuffer was passed as a body argument to
ngx.fetch() or r.subrequest() then exception was thrown "Error: invalid
Request body" when the request body had 0 length.
---

diff --git a/src/njs_vm.c b/src/njs_vm.c
index 7a2b0632..7183a24c 100644
--- a/src/njs_vm.c
+++ b/src/njs_vm.c
@@ -1602,6 +1602,12 @@ njs_vm_value_to_bytes(njs_vm_t *vm, njs_str_t *dst, njs_value_t *src)
         }
 
         if (njs_slow_path(njs_is_detached_buffer(buffer))) {
+            if (length == 0) {
+                dst->length = 0;
+                dst->start = NULL;
+                return NJS_OK;
+            }
+
             njs_type_error(vm, "detached buffer");
             return NJS_ERROR;
         }