From: Willy Tarreau <w@1wt.eu>
Date: Mon, 21 Sep 2026 20:56:00 +0000 (+0000)
Subject: REGTESTS: http-rules: test the declared capture slots
X-Git-Tag: v3.5-dev8~47
X-Git-Url: https://git.kaiwu.me/?a=commitdiff_plain;h=79c3114db568d401364e3af873b2487514b4daea;p=haproxy.git

REGTESTS: http-rules: test the declared capture slots

The "declare capture" directive, the "id" form of the capture action
and the capture-req()/capture-res() converters had no coverage; only
"capture request header" and capture.req.hdr() were used elsewhere.

The test declares three request slots and two response slots in the
frontend, fills them from the frontend and from the backend, with the
action and with the converter, and reads them back with
capture.req.hdr() and capture.res.hdr(). It also checks that the
converters return their input unchanged, that an undeclared slot yields
nothing and that a slot whose input is missing stays empty.
---

diff --git a/reg-tests/http-rules/declare_capture.vtc b/reg-tests/http-rules/declare_capture.vtc
new file mode 100644
index 000000000..3099b01a9
--- /dev/null
+++ b/reg-tests/http-rules/declare_capture.vtc
@@ -0,0 +1,97 @@
+varnishtest "Test the capture slots declared with 'declare capture'"
+
+# The "declare capture" directive, the "id" form of the capture action
+# and the capture-req()/capture-res() converters had no coverage. Only
+# the "capture request header" form and capture.req.hdr() were used
+# elsewhere.
+#
+# Three request slots and two response slots are declared in the
+# frontend and filled from both the frontend and the backend, then read
+# back with capture.req.hdr(), capture.res.hdr() and with the
+# capture-req()/capture-res() converters, which store their input in a
+# slot and return it unchanged.
+
+feature ignore_unknown_macro
+
+server s1 {
+	rxreq
+	txresp -hdr "x-srv: from-server"
+} -repeat 2 -start
+
+haproxy h1 -conf {
+    global
+    .if feature(THREAD)
+        thread-groups 1
+    .endif
+        chroot /
+
+    defaults
+	mode http
+	timeout connect "${HAPROXY_TEST_TIMEOUT-5s}"
+	timeout client  "${HAPROXY_TEST_TIMEOUT-5s}"
+	timeout server  "${HAPROXY_TEST_TIMEOUT-5s}"
+
+    frontend fe
+	bind "fd@${fe}"
+
+	# slots 0, 1 and 2 on the request side, 0 and 1 on the response one
+	declare capture request len 32
+	declare capture request len 32
+	declare capture request len 32
+	declare capture response len 32
+	declare capture response len 32
+
+	# the first slot is filled by the action, the second one by the
+	# converter which passes its input through
+	http-request capture path id 0
+	http-request set-var(txn.p) req.hdr(x-in),capture-req(1)
+
+	# the last request slot is filled from the backend
+	default_backend be
+
+    backend be
+	http-request capture str(from-backend) id 2
+
+	http-response capture res.hdr(x-srv) id 0
+	http-response set-var(txn.r) str(via-converter),capture-res(1)
+
+	http-response set-header x-var-req "%[var(txn.p)]"
+	http-response set-header x-var-res "%[var(txn.r)]"
+	http-response set-header x-req0    "%[capture.req.hdr(0)]"
+	http-response set-header x-req1    "%[capture.req.hdr(1)]"
+	http-response set-header x-req2    "%[capture.req.hdr(2)]"
+	http-response set-header x-req3    "%[capture.req.hdr(3)]"
+	http-response set-header x-res0    "%[capture.res.hdr(0)]"
+	http-response set-header x-res1    "%[capture.res.hdr(1)]"
+
+	server s1 ${s1_addr}:${s1_port}
+} -start
+
+client c1 -connect ${h1_fe_sock} {
+	txreq -url "/some/path" -hdr "x-in: captured"
+	rxresp
+	expect resp.status == 200
+
+	# the converters returned their input unchanged
+	expect resp.http.x-var-req == "captured"
+	expect resp.http.x-var-res == "via-converter"
+
+	expect resp.http.x-req0 == "/some/path"
+	expect resp.http.x-req1 == "captured"
+	expect resp.http.x-req2 == "from-backend"
+	# only three request slots were declared
+	expect resp.http.x-req3 == ""
+
+	expect resp.http.x-res0 == "from-server"
+	expect resp.http.x-res1 == "via-converter"
+} -run
+
+client c2 -connect ${h1_fe_sock} {
+	# a missing input leaves the slot empty
+	txreq -url "/other"
+	rxresp
+	expect resp.status == 200
+	expect resp.http.x-req0 == "/other"
+	expect resp.http.x-req1 == ""
+	expect resp.http.x-req2 == "from-backend"
+} -run