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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,34 +1,216 @@ | ||
| package nostr | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "compress/flate" | ||
| "context" | ||
| "encoding/json" | ||
| "errors" | ||
| "fmt" | ||
| "io" | ||
| "net" | ||
| "net/http" | ||
| "sync" | ||
|
|
||
| "github.com/gorilla/websocket" | ||
| "github.com/gobwas/httphead" | ||
| "github.com/gobwas/ws" | ||
| "github.com/gobwas/ws/wsflate" | ||
| "github.com/gobwas/ws/wsutil" | ||
| ) | ||
|
|
||
| type Connection struct { | ||
| socket *websocket.Conn | ||
| mutex sync.Mutex | ||
| conn net.Conn | ||
| enableCompression bool | ||
| controlHandler wsutil.FrameHandlerFunc | ||
| flateReader *wsflate.Reader | ||
| reader *wsutil.Reader | ||
| flateWriter *wsflate.Writer | ||
| writer *wsutil.Writer | ||
| msgState *wsflate.MessageState | ||
| mutex sync.Mutex | ||
| } | ||
|
|
||
| func NewConnection(socket *websocket.Conn) *Connection { | ||
| return &Connection{ | ||
| socket: socket, | ||
| func NewConnection(ctx context.Context, url string, requestHeader http.Header) (*Connection, error) { | ||
| dialer := ws.Dialer{ | ||
| Header: ws.HandshakeHeaderHTTP(requestHeader), | ||
| Extensions: []httphead.Option{ | ||
| wsflate.DefaultParameters.Option(), | ||
| }, | ||
| } | ||
| conn, _, hs, err := dialer.Dial(ctx, url) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to dial: %w", err) | ||
| } | ||
|
|
||
| enableCompression := false | ||
| state := ws.StateClientSide | ||
| for _, extension := range hs.Extensions { | ||
| if string(extension.Name) == wsflate.ExtensionName { | ||
| enableCompression = true | ||
| state |= ws.StateExtended | ||
| break | ||
| } | ||
| } | ||
|
|
||
| // reader | ||
| var flateReader *wsflate.Reader | ||
| var msgState wsflate.MessageState | ||
| if enableCompression { | ||
| msgState.SetCompressed(true) | ||
|
|
||
| flateReader = wsflate.NewReader(nil, func(r io.Reader) wsflate.Decompressor { | ||
| return flate.NewReader(r) | ||
| }) | ||
| } | ||
|
|
||
| controlHandler := wsutil.ControlFrameHandler(conn, ws.StateClientSide) | ||
| reader := &wsutil.Reader{ | ||
| Source: conn, | ||
| State: state, | ||
| OnIntermediate: controlHandler, | ||
| CheckUTF8: false, | ||
| Extensions: []wsutil.RecvExtension{ | ||
| &msgState, | ||
| }, | ||
| } | ||
|
|
||
| // writer | ||
| var flateWriter *wsflate.Writer | ||
| if enableCompression { | ||
| flateWriter = wsflate.NewWriter(nil, func(w io.Writer) wsflate.Compressor { | ||
| fw, err := flate.NewWriter(w, 4) | ||
| if err != nil { | ||
| InfoLogger.Printf("Failed to create flate writer: %v", err) | ||
| } | ||
| return fw | ||
| }) | ||
| } | ||
|
|
||
| writer := wsutil.NewWriter( | ||
| conn, | ||
| state, | ||
| ws.OpBinary, | ||
| ) | ||
| writer.SetExtensions(&msgState) | ||
|
|
||
| return &Connection{ | ||
| conn: conn, | ||
| enableCompression: enableCompression, | ||
| controlHandler: controlHandler, | ||
| flateReader: flateReader, | ||
| reader: reader, | ||
| flateWriter: flateWriter, | ||
| msgState: &msgState, | ||
| writer: writer, | ||
| }, nil | ||
| } | ||
|
|
||
| func (c *Connection) WriteJSON(v any) error { | ||
| c.mutex.Lock() | ||
| defer c.mutex.Unlock() | ||
| return c.socket.WriteJSON(v) | ||
|
|
||
| if c.enableCompression && c.msgState.IsCompressed() { | ||
| c.flateWriter.Reset(c.writer) | ||
| if err := json.NewEncoder(c.flateWriter).Encode(v); err != nil { | ||
| return fmt.Errorf("failed to encode json: %w", err) | ||
| } | ||
|
|
||
| err := c.flateWriter.Close() | ||
| if err != nil { | ||
| return fmt.Errorf("failed to close flate writer: %w", err) | ||
| } | ||
| } else { | ||
| if err := json.NewEncoder(c.writer).Encode(v); err != nil { | ||
| return fmt.Errorf("failed to encode json: %w", err) | ||
| } | ||
| } | ||
|
|
||
| err := c.writer.Flush() | ||
| if err != nil { | ||
| return fmt.Errorf("failed to flush writer: %w", err) | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func (c *Connection) Ping() error { | ||
| c.mutex.Lock() | ||
| defer c.mutex.Unlock() | ||
|
|
||
| return wsutil.WriteClientMessage(c.conn, ws.OpPing, nil) | ||
| } | ||
|
|
||
| func (c *Connection) WriteMessage(messageType int, data []byte) error { | ||
| func (c *Connection) WriteMessage(data []byte) error { | ||
| c.mutex.Lock() | ||
| defer c.mutex.Unlock() | ||
| return c.socket.WriteMessage(messageType, data) | ||
|
|
||
| if c.msgState.IsCompressed() && c.enableCompression { | ||
| c.flateWriter.Reset(c.writer) | ||
| if _, err := io.Copy(c.flateWriter, bytes.NewReader(data)); err != nil { | ||
| return fmt.Errorf("failed to write message: %w", err) | ||
| } | ||
|
|
||
| err := c.flateWriter.Close() | ||
| if err != nil { | ||
| return fmt.Errorf("failed to close flate writer: %w", err) | ||
| } | ||
| } else { | ||
| if _, err := io.Copy(c.writer, bytes.NewReader(data)); err != nil { | ||
| return fmt.Errorf("failed to write message: %w", err) | ||
| } | ||
| } | ||
|
|
||
| err := c.writer.Flush() | ||
| if err != nil { | ||
| return fmt.Errorf("failed to flush writer: %w", err) | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func (c *Connection) ReadMessage(ctx context.Context) ([]byte, error) { | ||
| for { | ||
| select { | ||
| case <-ctx.Done(): | ||
| return nil, errors.New("context canceled") | ||
| default: | ||
| } | ||
|
|
||
| h, err := c.reader.NextFrame() | ||
| if err != nil { | ||
| c.conn.Close() | ||
| return nil, fmt.Errorf("failed to advance frame: %w", err) | ||
| } | ||
|
|
||
| if h.OpCode.IsControl() { | ||
| if err := c.controlHandler(h, c.reader); err != nil { | ||
| return nil, fmt.Errorf("failed to handle control frame: %w", err) | ||
| } | ||
| } else if h.OpCode == ws.OpBinary || | ||
| h.OpCode == ws.OpText { | ||
| break | ||
| } | ||
|
|
||
| if err := c.reader.Discard(); err != nil { | ||
| return nil, fmt.Errorf("failed to discard: %w", err) | ||
| } | ||
| } | ||
|
|
||
| buf := new(bytes.Buffer) | ||
| if c.msgState.IsCompressed() && c.enableCompression { | ||
| c.flateReader.Reset(c.reader) | ||
| if _, err := io.Copy(buf, c.flateReader); err != nil { | ||
| return nil, fmt.Errorf("failed to read message: %w", err) | ||
| } | ||
| } else { | ||
| if _, err := io.Copy(buf, c.reader); err != nil { | ||
| return nil, fmt.Errorf("failed to read message: %w", err) | ||
| } | ||
| } | ||
|
|
||
| return buf.Bytes(), nil | ||
| } | ||
|
|
||
| func (c *Connection) Close() error { | ||
| return c.socket.Close() | ||
| return c.conn.Close() | ||
| } |
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