1 files changed, 126 insertions, 0 deletions
diff --git a/deprecated-webircgateway/pkg/webircgateway/transport_websocket.go b/deprecated-webircgateway/pkg/webircgateway/transport_websocket.go
new file mode 100644
index 0000000..960718b
--- /dev/null
+++ b/deprecated-webircgateway/pkg/webircgateway/transport_websocket.go
@@ -0,0 +1,126 @@
+package webircgateway
+
+import (
+	"fmt"
+	"net"
+	"net/http"
+	"strings"
+	"sync"
+
+	"golang.org/x/net/websocket"
+)
+
+type TransportWebsocket struct {
+	gateway  *Gateway
+	wsServer *websocket.Server
+}
+
+func (t *TransportWebsocket) Init(g *Gateway) {
+	t.gateway = g
+	t.wsServer = &websocket.Server{Handler: t.websocketHandler, Handshake: t.checkOrigin}
+	t.gateway.HttpRouter.Handle("/webirc/websocket/", t.wsServer)
+}
+
+func (t *TransportWebsocket) checkOrigin(config *websocket.Config, req *http.Request) (err error) {
+	config.Origin, err = websocket.Origin(config, req)
+
+	var origin string
+	if config.Origin != nil {
+		origin = config.Origin.String()
+	} else {
+		origin = ""
+	}
+
+	if !t.gateway.IsClientOriginAllowed(origin) {
+		err = fmt.Errorf("Origin %#v not allowed", origin)
+		t.gateway.Log(2, "%s. Closing connection", err)
+		return err
+	}
+
+	return err
+}
+
+func (t *TransportWebsocket) websocketHandler(ws *websocket.Conn) {
+	client := t.gateway.NewClient()
+
+	client.RemoteAddr = t.gateway.GetRemoteAddressFromRequest(ws.Request()).String()
+
+	clientHostnames, err := net.LookupAddr(client.RemoteAddr)
+	if err != nil {
+		client.RemoteHostname = client.RemoteAddr
+	} else {
+		// FQDNs include a . at the end. Strip it out
+		potentialHostname := strings.Trim(clientHostnames[0], ".")
+
+		// Must check that the resolved hostname also resolves back to the users IP
+		addr, err := net.LookupIP(potentialHostname)
+		if err == nil && len(addr) == 1 && addr[0].String() == client.RemoteAddr {
+			client.RemoteHostname = potentialHostname
+		} else {
+			client.RemoteHostname = client.RemoteAddr
+		}
+	}
+
+	if t.gateway.isRequestSecure(ws.Request()) {
+		client.Tags["secure"] = ""
+	}
+
+	_, remoteAddrPort, _ := net.SplitHostPort(ws.Request().RemoteAddr)
+	client.Tags["remote-port"] = remoteAddrPort
+
+	client.Log(2, "New websocket client on %s from %s %s", ws.Request().Host, client.RemoteAddr, client.RemoteHostname)
+	client.Ready()
+
+	// We wait until the client send queue has been drained
+	var sendDrained sync.WaitGroup
+	sendDrained.Add(1)
+
+	// Read from websocket
+	go func() {
+		for {
+			r := make([]byte, 1024)
+			len, err := ws.Read(r)
+			if err == nil && len > 0 {
+				message := string(r[:len])
+				client.Log(1, "client->: %s", message)
+				select {
+				case client.Recv <- message:
+				default:
+					client.Log(3, "Recv queue full. Dropping data")
+					// TODO: Should this really just drop the data or close the connection?
+				}
+
+			} else if err != nil {
+				client.Log(1, "Websocket connection closed (%s)", err.Error())
+				break
+
+			} else if len == 0 {
+				client.Log(1, "Got 0 bytes from websocket")
+			}
+		}
+
+		close(client.Recv)
+	}()
+
+	// Process signals for the client
+	for {
+		signal, ok := <-client.Signals
+		if !ok {
+			sendDrained.Done()
+			break
+		}
+
+		if signal[0] == "data" {
+			line := strings.Trim(signal[1], "\r\n")
+			client.Log(1, "->ws: %s", line)
+			ws.Write([]byte(line))
+		}
+
+		if signal[0] == "state" && signal[1] == "closed" {
+			ws.Close()
+		}
+	}
+
+	sendDrained.Wait()
+	ws.Close()
+}