first commit

app_vue/node_modules/websocket-driver/lib/websocket/driver/draft75.js

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+'use strict';
+
+var Buffer = require('safe-buffer').Buffer,
+    Base   = require('./base'),
+    util   = require('util');
+
+var Draft75 = function(request, url, options) {
+  Base.apply(this, arguments);
+  this._stage  = 0;
+  this.version = 'hixie-75';
+
+  this._headers.set('Upgrade', 'WebSocket');
+  this._headers.set('Connection', 'Upgrade');
+  this._headers.set('WebSocket-Origin', this._request.headers.origin);
+  this._headers.set('WebSocket-Location', this.url);
+};
+util.inherits(Draft75, Base);
+
+var instance = {
+  close: function() {
+    if (this.readyState === 3) return false;
+    this.readyState = 3;
+    this.emit('close', new Base.CloseEvent(null, null));
+    return true;
+  },
+
+  parse: function(chunk) {
+    if (this.readyState > 1) return;
+
+    this._reader.put(chunk);
+
+    this._reader.eachByte(function(octet) {
+      var message;
+
+      switch (this._stage) {
+        case -1:
+          this._body.push(octet);
+          this._sendHandshakeBody();
+          break;
+
+        case 0:
+          this._parseLeadingByte(octet);
+          break;
+
+        case 1:
+          this._length = (octet & 0x7F) + 128 * this._length;
+
+          if (this._closing && this._length === 0) {
+            return this.close();
+          }
+          else if ((octet & 0x80) !== 0x80) {
+            if (this._length === 0) {
+              this._stage = 0;
+            }
+            else {
+              this._skipped = 0;
+              this._stage   = 2;
+            }
+          }
+          break;
+
+        case 2:
+          if (octet === 0xFF) {
+            this._stage = 0;
+            message = Buffer.from(this._buffer).toString('utf8', 0, this._buffer.length);
+            this.emit('message', new Base.MessageEvent(message));
+          }
+          else {
+            if (this._length) {
+              this._skipped += 1;
+              if (this._skipped === this._length)
+                this._stage = 0;
+            } else {
+              this._buffer.push(octet);
+              if (this._buffer.length > this._maxLength) return this.close();
+            }
+          }
+          break;
+      }
+    }, this);
+  },
+
+  frame: function(buffer) {
+    if (this.readyState === 0) return this._queue([buffer]);
+    if (this.readyState > 1) return false;
+
+    if (typeof buffer !== 'string') buffer = buffer.toString();
+
+    var length = Buffer.byteLength(buffer),
+        frame  = Buffer.allocUnsafe(length + 2);
+
+    frame[0] = 0x00;
+    frame.write(buffer, 1);
+    frame[frame.length - 1] = 0xFF;
+
+    this._write(frame);
+    return true;
+  },
+
+  _handshakeResponse: function() {
+    var start   = 'HTTP/1.1 101 Web Socket Protocol Handshake',
+        headers = [start, this._headers.toString(), ''];
+
+    return Buffer.from(headers.join('\r\n'), 'utf8');
+  },
+
+  _parseLeadingByte: function(octet) {
+    if ((octet & 0x80) === 0x80) {
+      this._length = 0;
+      this._stage  = 1;
+    } else {
+      delete this._length;
+      delete this._skipped;
+      this._buffer = [];
+      this._stage  = 2;
+    }
+  }
+};
+
+for (var key in instance)
+  Draft75.prototype[key] = instance[key];
+
+module.exports = Draft75;