kopia lustrzana https://github.com/c9/core
103 wiersze
4.0 KiB
JavaScript
103 wiersze
4.0 KiB
JavaScript
/**
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* This file is part of IKPdb Cloud9 debugger plugin.
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* Copyright (c) 2016 by Cyril MORISSE, Audaxis
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* Licence MIT. See LICENCE at repository root
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*/
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define(function(require, exports, module) {
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"use strict";
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var MessageReader = module.exports = function(socket, callback) {
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this.IKPDB_MAGIC_CODE = "LLADpcdtbdpac";
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this.IKPDB_LENGTH_PREFIX = "length=";
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this.C9_MAGIC_CODE = "\r\n\r\n";
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this.C9_LENGTH_PREFIX = "Content-Length:";
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this.C9_PING_MESSAGE = this.C9_LENGTH_PREFIX + "0" + this.C9_MAGIC_CODE;
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this._socket = socket;
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this._callback = callback;
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this._receivedData = "";
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// We want the data handling callback to be ran
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// with this = MessageReader instance
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this._boundOnReceive = this._onReceive.bind(this);
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socket.on("data", this._boundOnReceive);
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};
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(function() {
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this._onReceive = function(data) {
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// console.debug("_onReceive(data) => ", data.length," ", data);
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this._receivedData += data;
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var fullResponse = null;
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while (fullResponse = this._checkForWholeMessage()) {
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if (fullResponse != this.C9_PING_MESSAGE) {
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this._callback(fullResponse);
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} else {
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console.log("Received \"ping\" message from Cloud9 (" + this.C9_PING_MESSAGE + ")");
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}
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}
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};
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/**
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* try to detects protocol in received data and returns a list
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* with [{{protocol}}, {{ilengthPrefixIdx}}, {{magicCodeIdx}}]
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* if protocol detection failed, returns null
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*/
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this._tryToDetectProtocol = function(receivedData) {
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var lengthPrefixIdx = null,
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magicCodeIdx = null;
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if ((magicCodeIdx = receivedData.indexOf(this.IKPDB_MAGIC_CODE)) != -1) {
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if ((lengthPrefixIdx = receivedData.indexOf(this.IKPDB_LENGTH_PREFIX)) != -1) {
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return ['IKPdb', lengthPrefixIdx, magicCodeIdx];
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}
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} else if ((magicCodeIdx = receivedData.indexOf(this.C9_MAGIC_CODE)) != -1) {
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if ((lengthPrefixIdx = receivedData.indexOf(this.C9_LENGTH_PREFIX)) != -1) {
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return ['C9', lengthPrefixIdx, magicCodeIdx];
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}
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}
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return null;
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};
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this._checkForWholeMessage = function() {
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var messageLength,
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responseLength,
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fullResponse = false,
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lengthPrefixIdx = 0,
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magicCodeIdx = 0,
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protocol = null,
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received = this._receivedData,
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MAGIC_CODE, LENGTH_PREFIX;
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protocol = this._tryToDetectProtocol(received);
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if (protocol) {
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lengthPrefixIdx = protocol[1];
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magicCodeIdx = protocol[2];
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MAGIC_CODE = protocol[0] == 'IKPdb' ? this.IKPDB_MAGIC_CODE : this.C9_MAGIC_CODE;
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LENGTH_PREFIX = protocol[0] == 'IKPdb' ? this.IKPDB_LENGTH_PREFIX : this.C9_LENGTH_PREFIX;
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messageLength = received.substring(lengthPrefixIdx + LENGTH_PREFIX.length);
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messageLength = messageLength.substring(0, messageLength.indexOf(MAGIC_CODE));
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responseLength = magicCodeIdx + MAGIC_CODE.length + parseInt(messageLength, 10);
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if (responseLength <= received.length) {
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fullResponse = received.substring(0, responseLength);
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this._receivedData = received.substring(responseLength);
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}
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}
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return fullResponse;
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};
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this.destroy = function() {
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this._socket && this._socket.removeListener("data", this._boundOnReceive);
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delete this._socket;
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delete this._callback;
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this._received = "";
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};
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}).call(MessageReader.prototype);
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}); |