self signed https localhost proxy with golang

create cert.txt

copied from https://devcenter.heroku.com/articles/ssl-certificate-self

install go and openssl

mac os x: brew install go openssl

Generate private key and certificate signing request

openssl genrsa -des3 -passout pass:x -out server.pass.key 2048
openssl rsa -passin pass:x -in server.pass.key -out server.key
rm server.pass.key
openssl req -new -key server.key -out server.csr
openssl x509 -req -sha256 -days 365 -in server.csr -signkey server.key -out server.crt

start the proxy
go run httpsproxy.go

httpsproxy.go

package main

import (
	"log"
	"net/http"
	"net/http/httputil"
	"net/url"
)

func main() {
	localProxyUrl, _ := url.Parse("http://127.0.0.1:8100/")
	localProxy := httputil.NewSingleHostReverseProxy(localProxyUrl)
	http.Handle("/", localProxy)

	log.Println("Serving on localhost:8080")
	log.Fatal(http.ListenAndServeTLS(":8080", "server.crt", "server.key", nil))
}

worked!

For all want to know how to connect, suppose your app starting in port 8100 ( http://loclhost:8100 ) use https://<your_ipv4_address>:8080/ . for example mine starting in https://192.xx.xx.1x3:8080/

@lolgans your link it dosent work, anyone can tell me how to run this into ionic app?

I have a problem.
I generate the certificate and put my system as trust.
Change network config with HTTPS proxy for localhost:8080
Follow to any site but my connection was lost.

I saw in logs this text:
2021/03/01 00:45:03 http: TLS handshake error from 127.0.0.1:50751: tls: first record does not look like a TLS handshake

What is wrong?
I was trying with mac and iPhone...