Adding upstream version 1.44.3.upstream/1.44.3upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 29 insertions, 0 deletions

diff --git a/libnetdata/datetime/rfc7231.c b/libnetdata/datetime/rfc7231.c
new file mode 100644
index 00000000..4925ed2c
--- /dev/null
+++ b/libnetdata/datetime/rfc7231.c
@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "../libnetdata.h"
+
+inline size_t rfc7231_datetime(char *buffer, size_t len, time_t now_t) {
+    if (unlikely(!buffer || !len))
+        return 0;
+
+    struct tm *tmp, tmbuf;
+
+    // Use gmtime_r for UTC time conversion.
+    tmp = gmtime_r(&now_t, &tmbuf);
+
+    if (unlikely(!tmp)) {
+        buffer[0] = '\0';
+        return 0;
+    }
+
+    // Format the date and time according to the RFC 7231 format.
+    size_t ret = strftime(buffer, len, "%a, %d %b %Y %H:%M:%S GMT", tmp);
+    if (unlikely(ret == 0))
+        buffer[0] = '\0';
+
+    return ret;
+}
+
+size_t rfc7231_datetime_ut(char *buffer, size_t len, usec_t now_ut) {
+    return rfc7231_datetime(buffer, len, (time_t) (now_ut / USEC_PER_SEC));
+}