109 lines
2.6 KiB
JavaScript
109 lines
2.6 KiB
JavaScript
var EventEmitter = require('events').EventEmitter;
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var sys = require('sys');
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var net = require('net');
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var NUL = '\0';
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var chars = Buffer('RS','utf8');
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var UTF8 = {
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R: chars[0],
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S: chars[1]
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};
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var Client = function(config) {
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EventEmitter.call(this);
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config = config || {};
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this.user = config.user;
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this.database = config.database;
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this.port = config.port || 5432;
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};
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sys.inherits(Client, EventEmitter);
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Client.prototype.connect = function() {
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var con = net.createConnection(this.port);
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var self = this;
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con.on('connect', function() {
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var data = ['user',self.user,'database', self.database,NUL].join(NUL);
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var dataBuffer = Buffer(data);
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var fullBuffer = Buffer(8 + dataBuffer.length);
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fullBuffer[0] = fullBuffer.length >>> 24;
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fullBuffer[1] = fullBuffer.length >>> 16;
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fullBuffer[2] = fullBuffer.length >>> 8;
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fullBuffer[3] = fullBuffer.length >>> 0;
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fullBuffer[4] = 0;
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fullBuffer[5] = 3;
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fullBuffer[6] = 0;
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fullBuffer[7] = 0;
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fullBuffer.write(data,8);
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console.log(fullBuffer);
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con.write(fullBuffer);
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});
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con.on('data', function(data) {
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console.log('data!');
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console.log(data);
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});
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};
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var Parser = {
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parse: function(buffer, offset) {
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offset = offset || 0;
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switch(buffer[offset]) {
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case UTF8.R:
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return Parser.parseR(buffer, offset);
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case UTF8.S:
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return Parser.parseS(buffer, offset);
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default:
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throw new Error("Unsupported message ID");
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}
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},
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parseR: function(buffer, offset) {
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var type = buffer[offset++];
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var length = Parser.parseLength(buffer, offset);
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offset += 4;
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if(length == 8) {
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return {
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name: 'AuthenticationOk',
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id: 'R',
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length: length
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}
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}
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throw new Erro("Unknown AuthenticatinOk message type");
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},
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parseS: function(buffer, offset) {
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var type = buffer[offset++];
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var length = Parser.parseLength(buffer, offset);
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offset += 4;
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var start = offset;
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while(buffer[offset++]) { }
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var end = offset -1;
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var parameterName = buffer.toString('utf8',start, end);
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var start = offset;
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while(buffer[offset++]) { }
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var end = offset - 1;
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var parameterValue = buffer.toString('utf8', start, end);
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return {
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name: 'ParameterStatus',
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id: 'S',
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length: length,
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parameterName: parameterName,
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parameterValue: parameterValue
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}
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},
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parseLength: function(buffer, offset) {
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var length = ((buffer[offset++] << 24) +
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(buffer[offset++] << 16) +
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(buffer[offset++] << 8) +
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buffer[offset++]);
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return length;
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}
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};
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module.exports = {
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Client: Client,
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Parser: Parser
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};
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