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118 lines
3.5 KiB
118 lines
3.5 KiB
/**
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* Copyright (c) 2010-2017 Brian Carlson (brian.m.carlson@gmail.com)
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* All rights reserved.
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*
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* This source code is licensed under the MIT license found in the
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* README.md file in the root directory of this source tree.
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*/
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var url = require('url');
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var dns = require('dns');
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var defaults = require('./defaults');
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var val = function(key, config, envVar) {
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if (envVar === undefined) {
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envVar = process.env[ 'PG' + key.toUpperCase() ];
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} else if (envVar === false) {
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// do nothing ... use false
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} else {
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envVar = process.env[ envVar ];
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}
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return config[key] ||
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envVar ||
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defaults[key];
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};
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//parses a connection string
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var parse = require('pg-connection-string').parse;
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var useSsl = function() {
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switch(process.env.PGSSLMODE) {
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case "disable":
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return false;
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case "prefer":
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case "require":
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case "verify-ca":
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case "verify-full":
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return true;
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}
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return defaults.ssl;
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};
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var ConnectionParameters = function(config) {
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//if a string is passed, it is a raw connection string so we parse it into a config
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config = typeof config == 'string' ? parse(config) : (config || {});
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//if the config has a connectionString defined, parse IT into the config we use
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//this will override other default values with what is stored in connectionString
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if(config.connectionString) {
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config = parse(config.connectionString);
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}
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this.user = val('user', config);
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this.database = val('database', config);
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this.port = parseInt(val('port', config), 10);
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this.host = val('host', config);
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this.password = val('password', config);
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this.binary = val('binary', config);
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this.ssl = typeof config.ssl === 'undefined' ? useSsl() : config.ssl;
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this.client_encoding = val("client_encoding", config);
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this.replication = val("replication", config);
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//a domain socket begins with '/'
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this.isDomainSocket = (!(this.host||'').indexOf('/'));
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this.keepAlive = config.keepAlive || false;
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this.application_name = val('application_name', config, 'PGAPPNAME');
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this.fallback_application_name = val('fallback_application_name', config, false);
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};
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// Convert arg to a string, surround in single quotes, and escape single quotes and backslashes
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var quoteParamValue = function(value) {
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return "'" + ('' + value).replace(/\\/g, "\\\\").replace(/'/g, "\\'") + "'";
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};
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var add = function(params, config, paramName) {
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var value = config[paramName];
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if(value) {
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params.push(paramName + "=" + quoteParamValue(value));
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}
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};
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ConnectionParameters.prototype.getLibpqConnectionString = function(cb) {
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var params = [];
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add(params, this, 'user');
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add(params, this, 'password');
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add(params, this, 'port');
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add(params, this, 'application_name');
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add(params, this, 'fallback_application_name');
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var ssl = typeof this.ssl === 'object' ? this.ssl : {sslmode: this.ssl};
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add(params, ssl, 'sslmode');
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add(params, ssl, 'sslca');
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add(params, ssl, 'sslkey');
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add(params, ssl, 'sslcert');
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if(this.database) {
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params.push("dbname=" + quoteParamValue(this.database));
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}
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if(this.replication) {
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params.push("replication=" + quoteParamValue(this.replication));
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}
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if(this.host) {
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params.push("host=" + quoteParamValue(this.host));
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}
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if(this.isDomainSocket) {
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return cb(null, params.join(' '));
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}
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if(this.client_encoding) {
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params.push("client_encoding=" + quoteParamValue(this.client_encoding));
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}
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dns.lookup(this.host, function(err, address) {
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if(err) return cb(err, null);
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params.push("hostaddr=" + quoteParamValue(address));
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return cb(null, params.join(' '));
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});
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};
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module.exports = ConnectionParameters;
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