Update WebSocket implementation to use Gorilla WebSocket library

- Replaced the existing `github.com/coder/websocket` package with `github.com/gorilla/websocket` for improved functionality and compatibility.
- Adjusted WebSocket connection handling, including message reading and writing, to align with the new library's API.
- Enhanced error handling and logging for WebSocket operations.
- Bumped version to v0.20.0 to reflect the changes made.

pkg/protocol/ws/connection.go

@@ -3,21 +3,19 @@ package ws
 import (
 	"context"
 	"crypto/tls"
-	"errors"
 	"fmt"
 	"io"
 	"net/http"
 	"time"
 
+	"github.com/gorilla/websocket"
 	"lol.mleku.dev/errorf"
 	"next.orly.dev/pkg/utils/units"
-
-	ws "github.com/coder/websocket"
 )
 
 // Connection represents a websocket connection to a Nostr relay.
 type Connection struct {
-	conn *ws.Conn
+	conn *websocket.Conn
 }
 
 // NewConnection creates a new websocket connection to a Nostr relay.
@@ -25,10 +23,23 @@ func NewConnection(
 	ctx context.Context, url string, reqHeader http.Header,
 	tlsConfig *tls.Config,
 ) (c *Connection, err error) {
-	var conn *ws.Conn
-	if conn, _, err = ws.Dial(
-		ctx, url, getConnectionOptions(reqHeader, tlsConfig),
-	); err != nil {
+	var conn *websocket.Conn
+	var resp *http.Response
+	dialer := getConnectionOptions(reqHeader, tlsConfig)
+	
+	// Prepare headers with default User-Agent if not present
+	headers := reqHeader
+	if headers == nil {
+		headers = make(http.Header)
+	}
+	if headers.Get("User-Agent") == "" {
+		headers.Set("User-Agent", "github.com/nbd-wtf/go-nostr")
+	}
+	
+	if conn, resp, err = dialer.DialContext(ctx, url, headers); err != nil {
+		if resp != nil {
+			resp.Body.Close()
+		}
 		return
 	}
 	conn.SetReadLimit(33 * units.Mb)
@@ -41,7 +52,14 @@ func NewConnection(
 func (c *Connection) WriteMessage(
 	ctx context.Context, data []byte,
 ) (err error) {
-	if err = c.conn.Write(ctx, ws.MessageText, data); err != nil {
+	deadline := time.Now().Add(10 * time.Second)
+	if ctx != nil {
+		if d, ok := ctx.Deadline(); ok {
+			deadline = d
+		}
+	}
+	c.conn.SetWriteDeadline(deadline)
+	if err = c.conn.WriteMessage(websocket.TextMessage, data); err != nil {
 		err = errorf.E("failed to write message: %w", err)
 		return
 	}
@@ -52,11 +70,22 @@ func (c *Connection) WriteMessage(
 func (c *Connection) ReadMessage(
 	ctx context.Context, buf io.Writer,
 ) (err error) {
-	var reader io.Reader
-	if _, reader, err = c.conn.Reader(ctx); err != nil {
+	deadline := time.Now().Add(60 * time.Second)
+	if ctx != nil {
+		if d, ok := ctx.Deadline(); ok {
+			deadline = d
+		}
+	}
+	c.conn.SetReadDeadline(deadline)
+	messageType, reader, err := c.conn.NextReader()
+	if err != nil {
 		err = fmt.Errorf("failed to get reader: %w", err)
 		return
 	}
+	if messageType != websocket.TextMessage && messageType != websocket.BinaryMessage {
+		err = fmt.Errorf("unexpected message type: %d", messageType)
+		return
+	}
 	if _, err = io.Copy(buf, reader); err != nil {
 		err = fmt.Errorf("failed to read message: %w", err)
 		return
@@ -66,14 +95,18 @@ func (c *Connection) ReadMessage(
 
 // Close closes the websocket connection.
 func (c *Connection) Close() error {
-	return c.conn.Close(ws.StatusNormalClosure, "")
+	c.conn.WriteControl(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseNormalClosure, ""), time.Now().Add(time.Second))
+	return c.conn.Close()
 }
 
 // Ping sends a ping message to the websocket connection.
 func (c *Connection) Ping(ctx context.Context) error {
-	ctx, cancel := context.WithTimeoutCause(
-		ctx, time.Millisecond*800, errors.New("ping took too long"),
-	)
-	defer cancel()
-	return c.conn.Ping(ctx)
+	deadline := time.Now().Add(800 * time.Millisecond)
+	if ctx != nil {
+		if d, ok := ctx.Deadline(); ok {
+			deadline = d
+		}
+	}
+	c.conn.SetWriteDeadline(deadline)
+	return c.conn.WriteControl(websocket.PingMessage, []byte{}, deadline)
 }

pkg/protocol/ws/connection_options.go

@@ -5,32 +5,21 @@ package ws
 import (
 	"crypto/tls"
 	"net/http"
-	"net/textproto"
+	"time"
 
-	ws "github.com/coder/websocket"
+	"github.com/gorilla/websocket"
 )
 
-var defaultConnectionOptions = &ws.DialOptions{
-	CompressionMode: ws.CompressionContextTakeover,
-	HTTPHeader: http.Header{
-		textproto.CanonicalMIMEHeaderKey("User-Agent"): {"github.com/nbd-wtf/go-nostr"},
-	},
-}
-
 func getConnectionOptions(
 	requestHeader http.Header, tlsConfig *tls.Config,
-) *ws.DialOptions {
-	if requestHeader == nil && tlsConfig == nil {
-		return defaultConnectionOptions
-	}
-
-	return &ws.DialOptions{
-		HTTPHeader:      requestHeader,
-		CompressionMode: ws.CompressionContextTakeover,
-		HTTPClient: &http.Client{
-			Transport: &http.Transport{
-				TLSClientConfig: tlsConfig,
-			},
-		},
+) *websocket.Dialer {
+	dialer := &websocket.Dialer{
+		ReadBufferSize:  1024,
+		WriteBufferSize: 1024,
+		TLSClientConfig: tlsConfig,
+		HandshakeTimeout: 10 * time.Second,
 	}
+	// Headers are passed directly to DialContext, not set on Dialer
+	// The User-Agent header will be set when calling DialContext if not present
+	return dialer
 }