| 337 | */ |
| 338 | |
| 339 | function server(message, value, etc) { |
| 340 | let socket = this.socket; |
| 341 | |
| 342 | if (!socket) return; |
| 343 | |
| 344 | if (2 == message) { |
| 345 | if ((1 === this.state) || (2 === this.state)) { |
| 346 | while (true) { |
| 347 | let line = socket.read(String, "\n"); |
| 348 | if (!line) |
| 349 | return; // out of data. wait for more. |
| 350 | |
| 351 | if (this.line) { |
| 352 | line = this.line + line; |
| 353 | this.line = undefined; |
| 354 | } |
| 355 | |
| 356 | if (10 != line.charCodeAt(line.length - 1)) { // partial header line, accumulate and wait for more |
| 357 | trace("partial header!!\n"); //@@ untested |
| 358 | this.line = line; |
| 359 | return; |
| 360 | } |
| 361 | |
| 362 | if ("\r\n" == line) { // empty line is end of headers |
| 363 | if (15 !== this.flags) |
| 364 | throw new Error("not a valid websocket handshake"); |
| 365 | |
| 366 | delete this.line; |
| 367 | delete this.flags; |
| 368 | |
| 369 | let sha1 = new Digest("SHA1"); |
| 370 | sha1.write(this.key); |
| 371 | delete this.key; |
| 372 | sha1.write("258EAFA5-E914-47DA-95CA-C5AB0DC85B11"); |
| 373 | |
| 374 | let response = [ |
| 375 | "HTTP/1.1 101 Web Socket Protocol Handshake\r\n", |
| 376 | "Connection: Upgrade\r\n", |
| 377 | "Upgrade: websocket\r\n", |
| 378 | "Sec-WebSocket-Accept: ", new Uint8Array(sha1.close()).toBase64(), "\r\n", |
| 379 | ] |
| 380 | |
| 381 | if (this.protocol) { |
| 382 | response.push("Sec-WebSocket-Protocol: ", this.protocol, "\r\n"); |
| 383 | delete this.protocol; |
| 384 | } |
| 385 | response.push("\r\n"); |
| 386 | |
| 387 | socket.write.apply(socket, response); |
| 388 | |
| 389 | this.callback(Server.handshake); // websocket handshake complete |
| 390 | |
| 391 | this.state = 3; |
| 392 | socket.callback = callback.bind(this); |
| 393 | value = socket.read(); // number of bytes available |
| 394 | if (0 !== value) // should be 0. unexpected to receive a websocket message before server receives handshake |
| 395 | socket.callback(2, value); |
| 396 | return; |