[Webkit-unassigned] [Bug 170463] New: Regression: Safari 10.1 WebSocket errors with "Failed to send WebSocket frame." if too much data is sent

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=170463

            Bug ID: 170463
           Summary: Regression: Safari 10.1 WebSocket errors with "Failed
                    to send WebSocket frame."  if too much data is sent
           Product: WebKit
           Version: Safari 10
          Hardware: Macintosh
                OS: macOS 10.12
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore JavaScript
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: nathan.friedly+webkit at gmail.com

I have some code that streams audio data over a WebSocket connection. In Safari 10.03 (and it other current and recent browsers), it works as expected. In Safari 10.1, it errors with "WebSocket connection to wss://[...] failed: Failed to send WebSocket frame." and closes the connection with status 1006 (CLOSE_ABNORMAL) after "too much" data is sent. (I haven't worked out the exact amount, but artificially slowing down my source seems to make it work sometimes. My code checks the bufferedAmount property and slows it self down if it gets too high, but this appears to always be 0 in Safari until after the error.)

This is some example code that reproduces the issue:


// this fails in Safari 10.1 but works in 10.03 (and other browsers)
var ws = new WebSocket('wss://echo.websocket.org');

ws.onerror = function(evt) {
  // Not sure why, but error events don't seem to include the actual error
  // The console, however, will have the following error:
  // WebSocket connection to 'wss://echo.websocket.org/' failed: Failed to send WebSocket frame.
  console.log("WebSocket error - see console for message");
}

ws.onclose = function(evt) {
  console.log(`WebSocket closed with code: ${evt.code}, reason: ${evt.reason}`);
}

ws.onopen = function() {
  console.log('sending first binary message');
  ws.send(new Uint8Array(23085)); // works
  console.log('bufferedAmount is ' + ws.bufferedAmount); // 0

  // this gets the error
  console.log('sending second binary message');
  ws.send(new Uint8Array(23085)); // triggers error and close
  console.log('bufferedAmount is ' + ws.bufferedAmount); // 0

  console.log('sending third binary message');
  ws.send(new Uint8Array(23085));
  console.log('bufferedAmount is ' + ws.bufferedAmount);

  ws.close();
}


https://jsfiddle.net/yta2mjuf/

My actual code is at https://github.com/watson-developer-cloud/speech-javascript-sdk/blob/v0.32.3/speech-to-text/recognize-stream.js, and you can see a live example of it at https://watson-speech.mybluemix.net/file-url.html

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