James Coglan
63 lines
2.3 KiB
JavaScript
63 lines
2.3 KiB
JavaScript
'use strict';
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var util = require('util'),
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common = require('./common'),
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Session = require('./session');
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var ServerSession = function(options, params) {
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Session.call(this, options);
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this._params = params;
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};
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util.inherits(ServerSession, Session);
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ServerSession.validParams = function(params) {
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if (!common.validParams(params)) return false;
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if (params.hasOwnProperty('client_max_window_bits')) {
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if ([true].concat(common.VALID_WINDOW_BITS).indexOf(params.client_max_window_bits) < 0)
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return false;
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}
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return true;
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};
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ServerSession.prototype.generateResponse = function() {
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var params = {};
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// https://tools.ietf.org/html/draft-ietf-hybi-permessage-compression#section-8.1.1.1
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if (this._acceptNoContextTakeover || this._params.server_no_context_takeover)
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params.server_no_context_takeover = true;
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// https://tools.ietf.org/html/draft-ietf-hybi-permessage-compression#section-8.1.1.2
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if (this._requestNoContextTakeover || this._params.client_no_context_takeover)
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params.client_no_context_takeover = true;
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// https://tools.ietf.org/html/draft-ietf-hybi-permessage-compression#section-8.1.2.1
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var acceptMax, serverMax;
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if (this._acceptMaxWindowBits || this._params.server_max_window_bits) {
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acceptMax = this._acceptMaxWindowBits || common.DEFAULT_MAX_WINDOW_BITS;
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serverMax = this._params.server_max_window_bits || common.DEFAULT_MAX_WINDOW_BITS;
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params.server_max_window_bits = Math.min(acceptMax, serverMax);
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}
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// https://tools.ietf.org/html/draft-ietf-hybi-permessage-compression#section-8.1.2.2
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var clientMax = this._params.client_max_window_bits, requestMax;
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if (clientMax) {
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if (clientMax === true) {
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if (this._requestMaxWindowBits) params.client_max_window_bits = this._requestMaxWindowBits;
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} else {
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requestMax = this._requestMaxWindowBits || common.DEFAULT_MAX_WINDOW_BITS;
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params.client_max_window_bits = Math.min(requestMax, clientMax);
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}
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}
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this._ownContextTakeover = !params.server_no_context_takeover;
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this._ownWindowBits = params.server_max_window_bits || common.DEFAULT_MAX_WINDOW_BITS;
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this._peerContextTakeover = !params.client_no_context_takeover;
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this._peerWindowBits = params.client_max_window_bits || common.DEFAULT_MAX_WINDOW_BITS;
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return params;
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};
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module.exports = ServerSession;
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