If the backend sends content-length header and streaming does

not gunzip, send content-length to client rather than chunked.

This makes progress-bars possible in browsers.

bin/varnishd/cache_center.c

@@ -166,7 +166,8 @@ cnt_prepresp(struct sess *sp)
 
 	sp->wrk->res_mode = 0;
 
-	if (!sp->wrk->do_stream)
+	if (!sp->wrk->do_stream || 
+	    (sp->wrk->h_content_length != NULL && !sp->wrk->do_gunzip))
 		sp->wrk->res_mode |= RES_LEN;
 
 	if (!sp->disable_esi && sp->obj->esidata != NULL) {

bin/varnishd/cache_response.c

@@ -410,6 +410,11 @@ RES_StreamStart(struct sess *sp)
 	if (sp->wrk->res_mode & RES_GUNZIP)
 		http_Unset(sp->wrk->resp, H_Content_Encoding);
 
+	if (!(sp->wrk->res_mode & RES_CHUNKED) &&
+	    sp->wrk->h_content_length != NULL)
+		http_PrintfHeader(sp->wrk, sp->fd, sp->wrk->resp,
+		    "Content-Length: %s", sp->wrk->h_content_length);
+
 	sp->acct_tmp.hdrbytes +=
 	    http_Write(sp->wrk, sp->wrk->resp, 1);
 

bin/varnishtest/tests/t00001.vtc

@@ -36,6 +36,7 @@ varnish v1 -vcl+backend {
 client c1 {
 	txreq  -url /bar
 	rxresp 
+	expect resp.http.content-length == 6
 	expect resp.bodylen == 6
 	txreq  -url /bla
 	rxresp