diff -r e5d96f6b9306 -r 78af44222463 src/server/util/io.c
--- a/src/server/util/io.c	Tue Nov 01 20:39:41 2022 +0100
+++ b/src/server/util/io.c	Tue Nov 01 20:46:15 2022 +0100
@@ -307,6 +307,11 @@
     return http->read_eof;
 }
 
+int64_t httpstream_written(IOStream *st) {
+    HttpStream *http = (HttpStream*)st;
+    return http->written;
+}
+
 ssize_t net_http_write(HttpStream *st, void *buf, size_t nbytes) {
     if(st->write_eof) return 0;
     IOStream *fd = st->fd;