| 38 | }; |
| 39 | |
| 40 | const mapBinary = (data: RawData, binaryType?: BinaryType) => { |
| 41 | switch (binaryType) { |
| 42 | case "arraybuffer": |
| 43 | if (data instanceof ArrayBuffer) { |
| 44 | // from WebSocket & binaryType "arraybuffer" |
| 45 | return data; |
| 46 | } else if (Buffer.isBuffer(data)) { |
| 47 | // from HTTP long-polling |
| 48 | return data.buffer.slice( |
| 49 | data.byteOffset, |
| 50 | data.byteOffset + data.byteLength, |
| 51 | ); |
| 52 | } else { |
| 53 | // from WebTransport (Uint8Array) |
| 54 | return data.slice().buffer; |
| 55 | } |
| 56 | case "nodebuffer": |
| 57 | default: |
| 58 | if (Buffer.isBuffer(data)) { |
| 59 | // from HTTP long-polling or WebSocket & binaryType "nodebuffer" (default) |
| 60 | return data; |
| 61 | } else { |
| 62 | // from WebTransport (Uint8Array) |
| 63 | return Buffer.from(data); |
| 64 | } |
| 65 | } |
| 66 | }; |