TLS requests are sent over HTTP instead of HTTPS

[spyrosmouchlianitis]

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I've setup the http-add-on with TLS enabled. The certificates are read from the add-on and TLS verification works correctly. My issues is when I send an https request to my ingress controller, the interceptor instead of sending the request to my service via https it switches to http.

According to this, shouldn't it work via https if TLS is enabled? https://github.com/kedacore/http-add-on/blob/0793ecec5a9f65d5843c36a544525987efc17521/interceptor/middleware/routing.go#L67-L83

I've tried sending the same request the add-on is attempting but with https and it works as expected.

Expected Behavior

Interceptor should send requests via https

Actual Behavior

Interceptor sends requests via http

Steps to Reproduce the Problem

1. Setup keda with http-add-on like usual
2. Enable TLS
3. Add TLS certificates on both ingress controller and http-add-on
4. Send a request to the ingress controller via https

Logs from KEDA HTTP operator

2024-05-14T08:00:34Z	ERROR	LoggingMiddleware.RoutingMiddleware.CountingMiddleware.UpstreamHandler.StaticHandler	Bad Gateway	{"routingKey": "//uat.mydomain.com/devops-274/", "namespacedName": {"name":"site-devops-274","namespace":"core-uat-branches"}, "stream": "http://site-devops-274.core-uat-branches:443/devops-274", "error": "read tcp 10.121.0.23:46932->10.4.235.37:443: read: connection reset by peer"}
github.com/kedacore/http-add-on/interceptor/handler.(*Static).ServeHTTP
	github.com/kedacore/http-add-on/interceptor/handler/static.go:36
github.com/kedacore/http-add-on/interceptor/handler.(*Upstream).ServeHTTP.func2
	github.com/kedacore/http-add-on/interceptor/handler/upstream.go:54
net/http/httputil.(*ReverseProxy).ServeHTTP
	net/http/httputil/reverseproxy.go:472
github.com/kedacore/http-add-on/interceptor/handler.(*Upstream).ServeHTTP
	github.com/kedacore/http-add-on/interceptor/handler/upstream.go:57
main.runProxyServer.newForwardingHandler.func2
	github.com/kedacore/http-add-on/interceptor/proxy_handlers.go:87
net/http.HandlerFunc.ServeHTTP
	net/http/server.go:2166
github.com/kedacore/http-add-on/interceptor/middleware.(*Counting).ServeHTTP
	github.com/kedacore/http-add-on/interceptor/middleware/counting.go:35
github.com/kedacore/http-add-on/interceptor/middleware.(*Routing).ServeHTTP
	github.com/kedacore/http-add-on/interceptor/middleware/routing.go:64
github.com/kedacore/http-add-on/interceptor/middleware.(*Logging).ServeHTTP
	github.com/kedacore/http-add-on/interceptor/middleware/logging.go:42
github.com/kedacore/http-add-on/interceptor/middleware.(*Metrics).ServeHTTP
	github.com/kedacore/http-add-on/interceptor/middleware/metrics.go:24
net/http.serverHandler.ServeHTTP
	net/http/server.go:3137
net/http.(*conn).serve
	net/http/server.go:2039

HTTP Add-on Version

0.8.0

Kubernetes Version

1.28

Platform

Microsoft Azure

Anything else?

No response