/usr/lib/nodejs/pg/native/index.js is in node-pg 0.7.1-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 | //require the c++ bindings & export to javascript
var EventEmitter = require('events').EventEmitter;
var utils = require(__dirname + "/../utils");
var binding;
try{
//v0.5.x
binding = require(__dirname + '/binding.node');
} catch(e) {
//v0.4.x
binding = require(__dirname + '/binding');
}
var Connection = binding.Connection;
var types = require(__dirname + "/../types");
var NativeQuery = require(__dirname + '/query');
var EventEmitter = require('events').EventEmitter;
var p = Connection.prototype;
for(var k in EventEmitter.prototype) {
p[k] = EventEmitter.prototype[k];
}
var nativeConnect = p.connect;
p.connect = function(cb) {
var self = this;
utils.buildLibpqConnectionString(this._config, function(err, conString) {
if(err) {
return cb ? cb(err) : self.emit('error', err);
}
nativeConnect.call(self, conString);
if(cb) {
var errCallback;
var connectCallback = function() {
//remove single-fire connection error callback
self.removeListener('error', errCallback);
cb(null);
}
errCallback = function(err) {
//remove singel-fire connection success callback
self.removeListener('connect', connectCallback);
cb(err);
}
self.once('connect', connectCallback);
self.once('error', errCallback);
}
})
}
p.query = function(config, values, callback) {
var q = new NativeQuery(config, values, callback);
this._queryQueue.push(q);
this._pulseQueryQueue();
return q;
}
var nativeCancel = p.cancel;
p.cancel = function(client, query) {
if (client._activeQuery == query)
this.connect(nativeCancel.bind(client));
else if (client._queryQueue.indexOf(query) != -1)
client._queryQueue.splice(client._queryQueue.indexOf(query), 1);
};
p._pulseQueryQueue = function(initialConnection) {
if(!this._connected) {
return;
}
if(this._activeQuery) {
return;
}
var query = this._queryQueue.shift();
if(!query) {
if(!initialConnection) {
this._drainPaused ? this._drainPaused++ : this.emit('drain');
}
return;
}
this._activeQuery = query;
if(query.name) {
if(this._namedQueries[query.name]) {
this._sendQueryPrepared(query.name, query.values||[]);
} else {
this._namedQuery = true;
this._namedQueries[query.name] = true;
this._sendPrepare(query.name, query.text, (query.values||[]).length);
}
}
else if(query.values) {
//call native function
this._sendQueryWithParams(query.text, query.values)
} else {
//call native function
this._sendQuery(query.text);
}
}
p.pauseDrain = function() {
this._drainPaused = 1;
};
p.resumeDrain = function() {
if(this._drainPaused > 1) {
this.emit('drain')
};
this._drainPaused = 0;
};
var clientBuilder = function(config) {
config = config || {};
var connection = new Connection();
connection._queryQueue = [];
connection._namedQueries = {};
connection._activeQuery = null;
connection._config = utils.normalizeConnectionInfo(config);
//attach properties to normalize interface with pure js client
connection.user = connection._config.user;
connection.password = connection._config.password;
connection.database = connection._config.database;
connection.host = connection._config.host;
connection.port = connection._config.port;
connection.on('connect', function() {
connection._connected = true;
connection._pulseQueryQueue(true);
});
//proxy some events to active query
connection.on('_row', function(row) {
connection._activeQuery.handleRow(row);
});
connection.on('_cmdStatus', function(status) {
var meta = {
};
meta.command = status.command.split(' ')[0];
meta.rowCount = parseInt(status.value);
connection._lastMeta = meta;
});
//TODO: emit more native error properties (make it match js error)
connection.on('_error', function(err) {
//create Error object from object literal
var error = new Error(err.message || "Unknown native driver error");
for(var key in err) {
error[key] = err[key];
}
//give up on trying to wait for named query prepare
this._namedQuery = false;
if(connection._activeQuery) {
connection._activeQuery.handleError(error);
} else {
connection.emit('error', error);
}
});
connection.on('_readyForQuery', function() {
var q = this._activeQuery;
//a named query finished being prepared
if(this._namedQuery) {
this._namedQuery = false;
this._sendQueryPrepared(q.name, q.values||[]);
} else {
connection._activeQuery.handleReadyForQuery(connection._lastMeta);
connection._activeQuery = null;
connection._pulseQueryQueue();
}
});
return connection;
};
module.exports = clientBuilder;
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