From 730ed3a74980b22c1676c4c5ffe9bf748f02a1da Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@spreadspace.org>
Date: Thu, 29 Jun 2017 04:05:31 +0200
Subject: usage of protocols can noe be configured

---
 src/daq/s5proxy/src/s5proxy/config.go |  2 +-
 src/daq/s5proxy/src/s5proxy/proxy.go  | 48 +++++++++++++++++++++++------------
 2 files changed, 33 insertions(+), 17 deletions(-)

diff --git a/src/daq/s5proxy/src/s5proxy/config.go b/src/daq/s5proxy/src/s5proxy/config.go
index 62ea047..07d4c3c 100644
--- a/src/daq/s5proxy/src/s5proxy/config.go
+++ b/src/daq/s5proxy/src/s5proxy/config.go
@@ -64,7 +64,7 @@ func (p *ProtocolType) fromString(str string) (err error) {
 	case string(HTTPSOnly):
 		*p = ProtocolType(strings.ToLower(str))
 	default:
-		return errors.New("invalid protocol: '" + str + "'")
+		return fmt.Errorf("invalid protocol: '"+str+"', must be one of '%s', '%s' or '%s'", HTTPOnly, HTTPSOnly, HTTPAndHTTPS)
 	}
 	return
 }
diff --git a/src/daq/s5proxy/src/s5proxy/proxy.go b/src/daq/s5proxy/src/s5proxy/proxy.go
index 3f5ec89..7d0b0bd 100644
--- a/src/daq/s5proxy/src/s5proxy/proxy.go
+++ b/src/daq/s5proxy/src/s5proxy/proxy.go
@@ -34,6 +34,7 @@ package main
 
 import (
 	"crypto/tls"
+	"fmt"
 	"net"
 	"net/http"
 	"net/http/httputil"
@@ -177,17 +178,18 @@ func (h *httpsRedirectHandler) ServeHTTP(w http.ResponseWriter, r *http.Request)
 	http.Redirect(w, r, uri.String(), h.code)
 }
 
-func (p *Proxy) RunHTTP(l net.Listener) error {
+func (p *Proxy) RunHTTPRedirector(l net.Listener) error {
 	mux := http.NewServeMux()
-	mux.Handle("/", &httpsRedirectHandler{http.StatusTemporaryRedirect}) // TODO: make redirect code configurable
-
-	srv := &http.Server{
-		Handler: mux,
-	}
+	mux.Handle("/", &httpsRedirectHandler{int(p.conf.Redirect2HTTPS)})
 
+	srv := &http.Server{Handler: mux}
 	return srv.Serve(l)
 }
 
+func (p *Proxy) RunHTTP(l net.Listener) error {
+	return p.srv.Serve(l)
+}
+
 func (p *Proxy) RunHTTPS(l net.Listener) error {
 	cert, err := tls.LoadX509KeyPair(p.conf.CertFile, p.conf.KeyFile)
 	if err != nil {
@@ -213,21 +215,35 @@ func (p *Proxy) RunHTTPS(l net.Listener) error {
 }
 
 func (p *Proxy) Run() error {
-	s5l.Printf("PROXY: listening on '%s'", p.conf.ListenAddr)
-
 	l, err := net.Listen("tcp", p.conf.ListenAddr)
 	if err != nil {
 		return err
 	}
-	m := cmux.New(l)
-	httpL := m.Match(cmux.HTTP1Fast())
-	httpsL := m.Match(cmux.Any())
 
-	go p.RunHTTP(httpL)
-	go p.RunHTTPS(httpsL)
+	s5l.Printf("PROXY: listening on '%s' using protocol: %s", p.conf.ListenAddr, p.conf.Protocol)
+	switch p.conf.Protocol {
+	case HTTPAndHTTPS:
+		m := cmux.New(l)
 
-	if err := m.Serve(); !strings.Contains(err.Error(), "use of closed network connection") {
-		return err
+		httpL := m.Match(cmux.HTTP1Fast())
+		if p.conf.Redirect2HTTPS > 0 {
+			s5l.Printf("PROXY: will redirect any traffic from http to https using status code %v", p.conf.Redirect2HTTPS)
+			go p.RunHTTPRedirector(httpL)
+		} else {
+			go p.RunHTTP(httpL)
+		}
+
+		httpsL := m.Match(cmux.Any())
+		go p.RunHTTPS(httpsL)
+
+		if err := m.Serve(); !strings.Contains(err.Error(), "use of closed network connection") {
+			return err
+		}
+		return nil
+	case HTTPOnly:
+		return p.RunHTTP(l)
+	case HTTPSOnly:
+		return p.RunHTTPS(l)
 	}
-	return nil
+	return fmt.Errorf("PROXY: unsupported protocol: '%s'", p.conf.Protocol)
 }
-- 
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