protocol: use binary message

This commit is contained in:
Shuanglei Tao
2017-11-23 22:01:22 +08:00
parent e9ac6dd972
commit 47ba5daa12
8 changed files with 90 additions and 209 deletions

View File

@@ -8,18 +8,30 @@
term, pingTimer, wsError;
var openWs = function() {
var ws = new WebSocket(url, protocols);
var ws = new WebSocket(url, protocols),
textDecoder = new TextDecoder(),
textEncoder = new TextEncoder();
var unloadCallback = function(event) {
var message = 'Close terminal? this will also terminate the command.';
(event || window.event).returnValue = message;
return message;
};
var sendMessage = function (msg) {
if (ws.readyState === WebSocket.OPEN) {
ws.send(textEncoder.encode(msg));
}
};
var sendPing = function() {
sendMessage("1");
};
ws.onopen = function(event) {
ws.binaryType = 'arraybuffer';
ws.onopen = function() {
console.log("Websocket connection opened");
wsError = false;
ws.send(JSON.stringify({AuthToken: authToken}));
pingTimer = setInterval(sendPing, 30 * 1000, ws);
sendMessage(JSON.stringify({AuthToken: authToken}));
pingTimer = setInterval(sendPing, 30 * 1000);
if (typeof term !== 'undefined') {
term.destroy();
@@ -28,18 +40,14 @@
term = new Terminal();
term.on('resize', function(size) {
if (ws.readyState === WebSocket.OPEN) {
ws.send("2" + JSON.stringify({columns: size.cols, rows: size.rows}));
}
sendMessage("2" + JSON.stringify({columns: size.cols, rows: size.rows}));
setTimeout(function() {
term.showOverlay(size.cols + 'x' + size.rows);
}, 500);
});
term.on("data", function(data) {
if (ws.readyState === WebSocket.OPEN) {
ws.send("0" + data);
}
sendMessage("0" + data);
});
term.on('open', function() {
@@ -62,10 +70,11 @@
};
ws.onmessage = function(event) {
var data = event.data.slice(1);
switch(event.data[0]) {
var cmd = String.fromCharCode(new DataView(event.data).getUint8()),
data = textDecoder.decode(event.data.slice(1));
switch(cmd) {
case '0':
term.writeUTF8(window.atob(data));
term.write(data);
break;
case '1': // pong
break;
@@ -104,9 +113,5 @@
};
};
var sendPing = function(ws) {
ws.send("1");
};
openWs();
})();

View File

@@ -1,118 +0,0 @@
// ported from hterm.Terminal.IO.prototype.writeUTF8
// https://chromium.googlesource.com/apps/libapps/+/master/hterm/js/hterm_terminal_io.js
UTF8Decoder = function() {
this.bytesLeft = 0;
this.codePoint = 0;
this.lowerBound = 0;
};
UTF8Decoder.prototype.decode = function(str) {
var ret = '';
for (var i = 0; i < str.length; i++) {
var c = str.charCodeAt(i);
if (this.bytesLeft == 0) {
if (c <= 0x7F) {
ret += str.charAt(i);
} else if (0xC0 <= c && c <= 0xDF) {
this.codePoint = c - 0xC0;
this.bytesLeft = 1;
this.lowerBound = 0x80;
} else if (0xE0 <= c && c <= 0xEF) {
this.codePoint = c - 0xE0;
this.bytesLeft = 2;
this.lowerBound = 0x800;
} else if (0xF0 <= c && c <= 0xF7) {
this.codePoint = c - 0xF0;
this.bytesLeft = 3;
this.lowerBound = 0x10000;
} else if (0xF8 <= c && c <= 0xFB) {
this.codePoint = c - 0xF8;
this.bytesLeft = 4;
this.lowerBound = 0x200000;
} else if (0xFC <= c && c <= 0xFD) {
this.codePoint = c - 0xFC;
this.bytesLeft = 5;
this.lowerBound = 0x4000000;
} else {
ret += '\ufffd';
}
} else {
if (0x80 <= c && c <= 0xBF) {
this.bytesLeft--;
this.codePoint = (this.codePoint << 6) + (c - 0x80);
if (this.bytesLeft == 0) {
var codePoint = this.codePoint;
if (codePoint < this.lowerBound
|| (0xD800 <= codePoint && codePoint <= 0xDFFF)
|| codePoint > 0x10FFFF) {
ret += '\ufffd';
} else {
if (codePoint < 0x10000) {
ret += String.fromCharCode(codePoint);
} else {
codePoint -= 0x10000;
ret += String.fromCharCode(
0xD800 + ((codePoint >>> 10) & 0x3FF),
0xDC00 + (codePoint & 0x3FF));
}
}
}
} else {
ret += '\ufffd';
this.bytesLeft = 0;
i--;
}
}
}
return ret;
};
Terminal.prototype.decodeUTF8 = function(str) {
return (new UTF8Decoder()).decode(str);
};
Terminal.prototype.encodeUTF8 = function(str) {
var ret = '';
for (var i = 0; i < str.length; i++) {
var c = str.charCodeAt(i);
if (0xDC00 <= c && c <= 0xDFFF) {
c = 0xFFFD;
} else if (0xD800 <= c && c <= 0xDBFF) {
if (i+1 < str.length) {
var d = str.charCodeAt(i+1);
if (0xDC00 <= d && d <= 0xDFFF) {
c = 0x10000 + ((c & 0x3FF) << 10) + (d & 0x3FF);
i++;
} else {
c = 0xFFFD;
}
} else {
c = 0xFFFD;
}
}
var bytesLeft;
if (c <= 0x7F) {
ret += str.charAt(i);
continue;
} else if (c <= 0x7FF) {
ret += String.fromCharCode(0xC0 | (c >>> 6));
bytesLeft = 1;
} else if (c <= 0xFFFF) {
ret += String.fromCharCode(0xE0 | (c >>> 12));
bytesLeft = 2;
} else {
ret += String.fromCharCode(0xF0 | (c >>> 18));
bytesLeft = 3;
}
while (bytesLeft > 0) {
bytesLeft--;
ret += String.fromCharCode(0x80 | ((c >>> (6 * bytesLeft)) & 0x3F));
}
}
return ret;
};
Terminal.prototype.writeUTF8 = function (str) {
this.write(this.decodeUTF8(str));
};