typo fix README

README.md

@@ -38,6 +38,28 @@ You can also use HTTP.
 curl http://localhost:4080
 ```
 
+## Testing Beyond Localhost
+
+You can use [Telebit](https://telebit.cloud) to share the experience with friends and loved ones:
+
+Completely userspace installation:
+
+```
+curl -fsSL https://get.telebit.cloud | bash
+```
+
+Easy configuration:
+
+```
+~/telebit http 4080
+> Forwarding https://lucky-duck-42.telebit.fun => localhost:4080
+
+~/telebit tcp 4080
+> Forwarding telebit.cloud:1234 => localhost:4080
+```
+
+Caveat: Due to a bug in telebit you must send 'hello' in telnet to establish a connection.
+
 # API Docs
 
 The API docs and examples can be seen at <http://localhost:4080>
@@ -93,7 +115,7 @@ Not Implemented
 
 I don't think these things would be difficult to add,
 but I was having fun learning lots of other things
-and I figured Some of these things I didn't implement
+and I figured they're not that important.
 
 * [ ] local log file
 * [ ] Rooms

chatserver-telnet.go

@@ -83,6 +83,7 @@ func handleTelnetConn(bufConn bufferedConn) {
 				email = strings.TrimSpace(msg)
 				emailParts := strings.Split(email, "@")
 				if 2 != len(emailParts) {
+					email = ""
 					fmt.Fprintf(bufConn, "Email: ")
 					continue
 				}

chatserver.go

@@ -10,7 +10,6 @@ import (
 	"encoding/base64"
 	"flag"
 	"fmt"
-	"io"
 	"io/ioutil"
 	"net"
 	"net/http"
@@ -43,12 +42,12 @@ type ConfMailer struct {
 // https://stackoverflow.com/questions/51472020/how-to-get-the-size-of-available-tcp-data
 type bufferedConn struct {
 	r *bufio.Reader
-	rout io.Reader // See https://github.com/polvi/sni/blob/master/sni.go#L135
+	//rout *io.Reader // See https://github.com/polvi/sni/blob/master/sni.go#L135
 	net.Conn
 }
 
 func newBufferedConn(c net.Conn) bufferedConn {
-	return bufferedConn{bufio.NewReader(c), nil, c}
+	return bufferedConn{bufio.NewReader(c), c}
 }
 
 func (b bufferedConn) Peek(n int) ([]byte, error) {
@@ -60,9 +59,11 @@ func (b bufferedConn) Buffered() int {
 }
 
 func (b bufferedConn) Read(p []byte) (int, error) {
+	/*
 		if b.rout != nil {
 			return b.rout.Read(p)
 		}
+	*/
 	return b.r.Read(p)
 }
 
@@ -91,7 +92,7 @@ var broadcastMsg chan chatMsg
 // Telnet
 var wantsServerHello chan bufferedConn
 var authTelnet chan telnetUser
-var cleanTelnet chan telnetUser
+var cleanTelnet chan telnetUser // intentionally blocking
 
 // HTTP
 var demuxHttpClient chan bufferedConn
@@ -100,7 +101,7 @@ var valAuthReqs chan authReq
 var delAuthReqs chan authReq
 
 func usage() {
-	fmt.Fprintf(os.Stderr, "\nusage: go run chatserver.go\n")
+	fmt.Fprintf(os.Stderr, "\nusage: go run chatserver*.go\n")
 	flag.PrintDefaults()
 	fmt.Println()
 
@@ -166,6 +167,9 @@ func muxTcp(conn bufferedConn) {
 	}
 
 	if "" == protocol {
+		// Throw away the first bytes
+		b := make([]byte, 4096)
+		conn.Read(b)
 		fmt.Fprintf(conn, "\n\nWelcome to Sample Chat! You're not an HTTP client, assuming Telnet.\nYou must authenticate via email to participate\n\nEmail: ")
 		wantsServerHello <- conn
 		return
@@ -297,7 +301,7 @@ func main() {
 	virginConns = make(chan net.Conn, 128)
 
 	// TCP & Authentication
-	telnetConns := make(map[bufferedConn]telnetUser)
+	telnetConns := make(map[string]telnetUser)
 	wantsServerHello = make(chan bufferedConn, 128)
 	authTelnet = make(chan telnetUser, 128)
 
@@ -385,7 +389,12 @@ func main() {
 		case u := <-authTelnet:
 			// allow to receive messages
 			// (and be counted among the users)
-			telnetConns[u.bufConn] = u
+			_, ok := telnetConns[u.email]
+			if ok {
+				// this is a blocking channel, and that's important
+				cleanTelnet <- telnetConns[u.email]
+			}
+			telnetConns[u.email] = u
 			// is chan chan the right way to handle this?
 			u.userCount <- len(telnetConns)
 			broadcastMsg <- chatMsg{
@@ -418,7 +427,7 @@ func main() {
 			close(u.newMsg)
 			// we can safely ignore this error, if any
 			u.bufConn.Close()
-			delete(telnetConns, u.bufConn)
+			delete(telnetConns, u.email)
 		case bufConn := <-gotClientHello:
 			go muxTcp(bufConn)
 		case bufConn := <-demuxHttpClient: