xP: move to a WebSocket package with compression

Compression happens to be broken in Safari,
though luckily there are friendlier browsers one can use.

xP/go.mod

@@ -2,4 +2,9 @@ module janouch.name/xK/xP
 
 go 1.18
 
-require golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d
+require nhooyr.io/websocket v1.8.7
+
+require (
+	github.com/klauspost/compress v1.15.9 // indirect
+	golang.org/x/sys v0.0.0-20210423082822-04245dca01da // indirect
+)

xP/go.sum

@@ -1,2 +1,62 @@
-golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d h1:20cMwl2fHAzkJMEA+8J4JgqBQcQGzbisXo31MIeenXI=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE=
+github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI=
+github.com/gin-gonic/gin v1.6.3 h1:ahKqKTFpO5KTPHxWZjEdPScmYaGtLo8Y4DMHoEsnp14=
+github.com/gin-gonic/gin v1.6.3/go.mod h1:75u5sXoLsGZoRN5Sgbi1eraJ4GU3++wFwWzhwvtwp4M=
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+github.com/go-playground/universal-translator v0.17.0 h1:icxd5fm+REJzpZx7ZfpaD876Lmtgy7VtROAbHHXk8no=
+github.com/go-playground/universal-translator v0.17.0/go.mod h1:UkSxE5sNxxRwHyU+Scu5vgOQjsIJAF8j9muTVoKLVtA=
+github.com/go-playground/validator/v10 v10.2.0 h1:KgJ0snyC2R9VXYN2rneOtQcw5aHQB1Vv0sFl1UcHBOY=
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+github.com/gobwas/ws v1.0.2 h1:CoAavW/wd/kulfZmSIBt6p24n4j7tHgNVCjsfHVNUbo=
+github.com/gobwas/ws v1.0.2/go.mod h1:szmBTxLgaFppYjEmNtny/v3w89xOydFnnZMcgRRu/EM=
+github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
+github.com/golang/protobuf v1.3.5 h1:F768QJ1E9tib+q5Sc8MkdJi1RxLTbRcTf8LJV56aRls=
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+github.com/google/go-cmp v0.4.0 h1:xsAVV57WRhGj6kEIi8ReJzQlHHqcBYCElAvkovg3B/4=
+github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
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+github.com/gorilla/websocket v1.4.1 h1:q7AeDBpnBk8AogcD4DSag/Ukw/KV+YhzLj2bP5HvKCM=
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+golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
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+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
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+nhooyr.io/websocket v1.8.7 h1:usjR2uOr/zjjkVMy0lW+PPohFok7PCow5sDjLgX4P4g=
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xP/xP.go

@@ -16,7 +16,7 @@ import (
 	"os"
 	"time"
 
-	"golang.org/x/net/websocket"
+	"nhooyr.io/websocket"
 )
 
 var (
@@ -27,16 +27,21 @@ var (
 
 func clientToRelay(
 	ctx context.Context, ws *websocket.Conn, conn net.Conn) bool {
-	var j string
+	t, b, err := ws.Read(ctx)
-	if err := websocket.Message.Receive(ws, &j); err != nil {
+	if err != nil {
 		log.Println("Command receive failed: " + err.Error())
 		return false
 	}
+	if t != websocket.MessageText {
+		log.Println("Command receive failed: " +
+			"binary messages are not supported")
+		return false
+	}
 
-	log.Printf("?> %s\n", j)
+	log.Printf("?> %s\n", b)
 
 	var m RelayCommandMessage
-	if err := json.Unmarshal([]byte(j), &m); err != nil {
+	if err := json.Unmarshal(b, &m); err != nil {
 		log.Println("Command unmarshalling failed: " + err.Error())
 		return false
 	}
@@ -85,7 +90,7 @@ func relayToClient(
 		log.Println("Event marshalling failed: " + err.Error())
 		return false
 	}
-	if err := websocket.Message.Send(ws, string(j)); err != nil {
+	if err := ws.Write(ctx, websocket.MessageText, j); err != nil {
 		log.Println("Event send failed: " + err.Error())
 		return false
 	}
@@ -94,7 +99,7 @@ func relayToClient(
 	return true
 }
 
-func errorToClient(ws *websocket.Conn, err error) bool {
+func errorToClient(ctx context.Context, ws *websocket.Conn, err error) bool {
 	j, err := json.Marshal(&RelayEventMessage{
 		EventSeq: 0,
 		Data: RelayEventData{
@@ -109,22 +114,37 @@ func errorToClient(ws *websocket.Conn, err error) bool {
 		log.Println("Event marshalling failed: " + err.Error())
 		return false
 	}
-	if err := websocket.Message.Send(ws, string(j)); err != nil {
+	if err := ws.Write(ctx, websocket.MessageText, j); err != nil {
 		log.Println("Event send failed: " + err.Error())
 		return false
 	}
 	return true
 }
 
-func handleWebSocket(ws *websocket.Conn) {
+func handleWS(w http.ResponseWriter, r *http.Request) {
+	ws, err := websocket.Accept(w, r, &websocket.AcceptOptions{
+		InsecureSkipVerify: true,
+		CompressionMode:    websocket.CompressionContextTakeover,
+		// This is for the payload, and happens to trigger on all messages.
+		CompressionThreshold: 16,
+	})
+	if err != nil {
+		log.Println("Client rejected: " + err.Error())
+		return
+	}
+
+	defer ws.Close(websocket.StatusGoingAway, "Goodbye")
+
+	ctx, cancel := context.WithCancel(r.Context())
+	defer cancel()
+
 	conn, err := net.Dial("tcp", addressConnect)
 	if err != nil {
-		errorToClient(ws, err)
+		errorToClient(ctx, ws, err)
 		return
 	}
 
 	// We don't need to intervene, so it's just two separate pipes so far.
-	ctx, cancel := context.WithCancel(ws.Request().Context())
 	go func() {
 		for clientToRelay(ctx, ws, conn) {
 		}
@@ -184,7 +204,7 @@ func main() {
 		addressWS = os.Args[3]
 	}
 
-	http.Handle("/ws", websocket.Handler(handleWebSocket))
+	http.Handle("/ws", http.HandlerFunc(handleWS))
 	http.Handle("/", http.HandlerFunc(handleDefault))
 
 	s := &http.Server{