reverseproxy: default to port 80 for upstreams in Caddyfile (#3772)

* reverseproxy: default to port 80 for port-less upstream dial addresses

* reverseproxy: replace integration test with an adapter test

Fixes #3761

1 files changed, 113 insertions, 0 deletions

diff --git a/caddytest/integration/caddyfile_adapt/portless_upstream.txt b/caddytest/integration/caddyfile_adapt/portless_upstream.txt
new file mode 100644
index 0000000..0e060dd
--- /dev/null
+++ b/caddytest/integration/caddyfile_adapt/portless_upstream.txt
@@ -0,0 +1,113 @@
+whoami.example.com {
+	reverse_proxy whoami
+}
+
+app.example.com {
+	reverse_proxy app:80
+}
+unix.example.com {
+	reverse_proxy unix//path/to/socket
+}
+----------
+{
+	"apps": {
+		"http": {
+			"servers": {
+				"srv0": {
+					"listen": [
+						":443"
+					],
+					"routes": [
+						{
+							"match": [
+								{
+									"host": [
+										"whoami.example.com"
+									]
+								}
+							],
+							"handle": [
+								{
+									"handler": "subroute",
+									"routes": [
+										{
+											"handle": [
+												{
+													"handler": "reverse_proxy",
+													"upstreams": [
+														{
+															"dial": "whoami:80"
+														}
+													]
+												}
+											]
+										}
+									]
+								}
+							],
+							"terminal": true
+						},
+						{
+							"match": [
+								{
+									"host": [
+										"unix.example.com"
+									]
+								}
+							],
+							"handle": [
+								{
+									"handler": "subroute",
+									"routes": [
+										{
+											"handle": [
+												{
+													"handler": "reverse_proxy",
+													"upstreams": [
+														{
+															"dial": "unix//path/to/socket"
+														}
+													]
+												}
+											]
+										}
+									]
+								}
+							],
+							"terminal": true
+						},
+						{
+							"match": [
+								{
+									"host": [
+										"app.example.com"
+									]
+								}
+							],
+							"handle": [
+								{
+									"handler": "subroute",
+									"routes": [
+										{
+											"handle": [
+												{
+													"handler": "reverse_proxy",
+													"upstreams": [
+														{
+															"dial": "app:80"
+														}
+													]
+												}
+											]
+										}
+									]
+								}
+							],
+							"terminal": true
+						}
+					]
+				}
+			}
+		}
+	}
+}