do not relay empty chunks, they look like EOF in chunked encoding

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/relay.c b/relay.c
index 5de5cb4..ba6b95a 100644
--- a/relay.c
+++ b/relay.c
@@ -130,6 +130,9 @@ static void relay_read_cb(struct ustream *s, int bytes)
 	}
 
 	buf = ustream_get_read_buf(s, &len);
+	if (!buf || !len)
+		return;
+
 	uh_chunk_write(cl, buf, len);
 	ustream_consume(s, len);
 }