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526 lines
18 KiB
526 lines
18 KiB
"use strict";
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var ReadPreference = require('./read_preference'),
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parser = require('url'),
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f = require('util').format,
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assign = require('./utils').assign,
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dns = require('dns');
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module.exports = function(url, options, callback) {
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if (typeof options === 'function') (callback = options), (options = {});
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options = options || {};
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var result = parser.parse(url, true);
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if (result.protocol !== 'mongodb:' && result.protocol !== 'mongodb+srv:') {
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return callback(new Error('invalid schema, expected mongodb or mongodb+srv'));
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}
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if (result.protocol === 'mongodb+srv:') {
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if (result.hostname.split('.').length < 3) {
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return callback(new Error('uri does not have hostname, domainname and tld'));
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}
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result.domainLength = result.hostname.split('.').length;
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if (result.pathname && result.pathname.match(',')) {
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return callback(new Error('invalid uri, cannot contain multiple hostnames'));
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}
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if (result.port) {
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return callback(new Error('Ports not accepted with mongodb+srv'));
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}
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var srvAddress = '_mongodb._tcp.' + result.host;
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dns.resolveSrv(srvAddress, function(err, addresses) {
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if (err) return callback(err);
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if (addresses.length === 0) {
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return callback(new Error('No addresses found at host'));
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}
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for (var i = 0; i < addresses.length; i++) {
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if (!matchesParentDomain(addresses[i].name, result.hostname, result.domainLength)) {
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return callback(new Error('srv record does not share hostname with parent uri'));
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}
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}
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var connectionStrings = addresses.map(function(address, i) {
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if (i === 0) return 'mongodb://' + address.name + ':' + address.port;
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else return address.name + ':' + address.port;
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});
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var connectionString = connectionStrings.join(',') + '/';
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var connectionStringOptions = [];
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// Default to SSL true
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if (!options.ssl && !result.search) {
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connectionStringOptions.push('ssl=true');
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} else if (!options.ssl && result.search && !result.search.match('ssl')) {
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connectionStringOptions.push('ssl=true');
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}
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// Keep original uri options
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if (result.search) {
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connectionStringOptions.push(result.search.replace('?', ''));
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}
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dns.resolveTxt(result.host, function(err, record) {
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if (err && err.code !== 'ENODATA') return callback(err);
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if (err && err.code === 'ENODATA') record = null;
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if (record) {
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if (record.length > 1) {
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return callback(new Error('multiple text records not allowed'));
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}
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record = record[0];
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if (record.length > 1) record = record.join('');
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else record = record[0];
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if (!record.includes('authSource') && !record.includes('replicaSet')) {
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return callback(new Error('text record must only set `authSource` or `replicaSet`'));
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}
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connectionStringOptions.push(record);
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}
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// Add any options to the connection string
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if (connectionStringOptions.length) {
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connectionString += '?' + connectionStringOptions.join('&');
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}
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parseHandler(connectionString, options, callback);
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});
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});
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} else {
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parseHandler(url, options, callback);
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}
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};
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function matchesParentDomain(srvAddress, parentDomain) {
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var regex = /^.*?\./;
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var srv = '.' + srvAddress.replace(regex, '');
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var parent = '.' + parentDomain.replace(regex, '');
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if (srv.endsWith(parent)) return true;
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else return false;
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}
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function parseHandler(address, options, callback) {
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var result, err;
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try {
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result = parseConnectionString(address, options);
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} catch (e) {
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err = e;
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}
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return err ? callback(err, null) : callback(null, result);
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}
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function parseConnectionString(url, options) {
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// Variables
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var connection_part = '';
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var auth_part = '';
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var query_string_part = '';
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var dbName = 'admin';
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// Url parser result
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var result = parser.parse(url, true);
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if((result.hostname == null || result.hostname == '') && url.indexOf('.sock') == -1) {
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throw new Error('no hostname or hostnames provided in connection string');
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}
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if(result.port == '0') {
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throw new Error('invalid port (zero) with hostname');
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}
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if(!isNaN(parseInt(result.port, 10)) && parseInt(result.port, 10) > 65535) {
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throw new Error('invalid port (larger than 65535) with hostname');
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}
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if(result.path
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&& result.path.length > 0
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&& result.path[0] != '/'
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&& url.indexOf('.sock') == -1) {
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throw new Error('missing delimiting slash between hosts and options');
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}
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if(result.query) {
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for(var name in result.query) {
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if(name.indexOf('::') != -1) {
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throw new Error('double colon in host identifier');
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}
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if(result.query[name] == '') {
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throw new Error('query parameter ' + name + ' is an incomplete value pair');
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}
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}
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}
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if(result.auth) {
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var parts = result.auth.split(':');
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if(url.indexOf(result.auth) != -1 && parts.length > 2) {
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throw new Error('Username with password containing an unescaped colon');
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}
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if(url.indexOf(result.auth) != -1 && result.auth.indexOf('@') != -1) {
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throw new Error('Username containing an unescaped at-sign');
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}
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}
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// Remove query
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var clean = url.split('?').shift();
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// Extract the list of hosts
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var strings = clean.split(',');
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var hosts = [];
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for(var i = 0; i < strings.length; i++) {
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var hostString = strings[i];
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if(hostString.indexOf('mongodb') != -1) {
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if(hostString.indexOf('@') != -1) {
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hosts.push(hostString.split('@').pop())
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} else {
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hosts.push(hostString.substr('mongodb://'.length));
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}
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} else if(hostString.indexOf('/') != -1) {
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hosts.push(hostString.split('/').shift());
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} else if(hostString.indexOf('/') == -1) {
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hosts.push(hostString.trim());
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}
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}
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for(i = 0; i < hosts.length; i++) {
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var r = parser.parse(f('mongodb://%s', hosts[i].trim()));
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if(r.path && r.path.indexOf(':') != -1) {
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// Not connecting to a socket so check for an extra slash in the hostname.
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// Using String#split as perf is better than match.
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if (r.path.split('/').length > 1) {
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throw new Error('slash in host identifier');
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} else {
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throw new Error('double colon in host identifier');
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}
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}
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}
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// If we have a ? mark cut the query elements off
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if(url.indexOf("?") != -1) {
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query_string_part = url.substr(url.indexOf("?") + 1);
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connection_part = url.substring("mongodb://".length, url.indexOf("?"))
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} else {
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connection_part = url.substring("mongodb://".length);
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}
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// Check if we have auth params
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if(connection_part.indexOf("@") != -1) {
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auth_part = connection_part.split("@")[0];
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connection_part = connection_part.split("@")[1];
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}
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// Check if the connection string has a db
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if(connection_part.indexOf(".sock") != -1) {
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if(connection_part.indexOf(".sock/") != -1) {
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dbName = connection_part.split(".sock/")[1];
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// Check if multiple database names provided, or just an illegal trailing backslash
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if (dbName.indexOf("/") != -1) {
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if (dbName.split("/").length == 2 && dbName.split("/")[1].length == 0) {
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throw new Error('Illegal trailing backslash after database name');
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}
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throw new Error('More than 1 database name in URL');
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}
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connection_part = connection_part.split("/", connection_part.indexOf(".sock") + ".sock".length);
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}
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} else if(connection_part.indexOf("/") != -1) {
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// Check if multiple database names provided, or just an illegal trailing backslash
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if (connection_part.split("/").length > 2) {
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if (connection_part.split("/")[2].length == 0) {
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throw new Error('Illegal trailing backslash after database name');
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}
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throw new Error('More than 1 database name in URL');
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}
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dbName = connection_part.split("/")[1];
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connection_part = connection_part.split("/")[0];
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}
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// Result object
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var object = {};
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// Pick apart the authentication part of the string
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var authPart = auth_part || '';
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var auth = authPart.split(':', 2);
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// Decode the URI components
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auth[0] = decodeURIComponent(auth[0]);
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if(auth[1]){
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auth[1] = decodeURIComponent(auth[1]);
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}
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// Add auth to final object if we have 2 elements
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if(auth.length == 2) object.auth = {user: auth[0], password: auth[1]};
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// if user provided auth options, use that
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if(options && options.auth != null) object.auth = options.auth;
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// Variables used for temporary storage
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var hostPart;
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var urlOptions;
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var servers;
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var serverOptions = {socketOptions: {}};
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var dbOptions = {read_preference_tags: []};
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var replSetServersOptions = {socketOptions: {}};
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var mongosOptions = {socketOptions: {}};
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// Add server options to final object
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object.server_options = serverOptions;
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object.db_options = dbOptions;
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object.rs_options = replSetServersOptions;
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object.mongos_options = mongosOptions;
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// Let's check if we are using a domain socket
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if(url.match(/\.sock/)) {
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// Split out the socket part
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var domainSocket = url.substring(
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url.indexOf("mongodb://") + "mongodb://".length
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, url.lastIndexOf(".sock") + ".sock".length);
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// Clean out any auth stuff if any
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if(domainSocket.indexOf("@") != -1) domainSocket = domainSocket.split("@")[1];
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servers = [{domain_socket: domainSocket}];
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} else {
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// Split up the db
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hostPart = connection_part;
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// Deduplicate servers
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var deduplicatedServers = {};
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// Parse all server results
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servers = hostPart.split(',').map(function(h) {
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var _host, _port, ipv6match;
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//check if it matches [IPv6]:port, where the port number is optional
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if ((ipv6match = /\[([^\]]+)\](?:\:(.+))?/.exec(h))) {
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_host = ipv6match[1];
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_port = parseInt(ipv6match[2], 10) || 27017;
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} else {
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//otherwise assume it's IPv4, or plain hostname
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var hostPort = h.split(':', 2);
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_host = hostPort[0] || 'localhost';
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_port = hostPort[1] != null ? parseInt(hostPort[1], 10) : 27017;
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// Check for localhost?safe=true style case
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if(_host.indexOf("?") != -1) _host = _host.split(/\?/)[0];
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}
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// No entry returned for duplicate server
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if(deduplicatedServers[_host + "_" + _port]) return null;
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deduplicatedServers[_host + "_" + _port] = 1;
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// Return the mapped object
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return {host: _host, port: _port};
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}).filter(function(x) {
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return x != null;
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});
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}
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// Get the db name
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object.dbName = dbName || 'admin';
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// Split up all the options
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urlOptions = (query_string_part || '').split(/[&;]/);
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// Ugh, we have to figure out which options go to which constructor manually.
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urlOptions.forEach(function(opt) {
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if(!opt) return;
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var splitOpt = opt.split('='), name = splitOpt[0], value = splitOpt[1];
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// Options implementations
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switch(name) {
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case 'slaveOk':
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case 'slave_ok':
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serverOptions.slave_ok = (value == 'true');
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dbOptions.slaveOk = (value == 'true');
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break;
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case 'maxPoolSize':
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case 'poolSize':
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serverOptions.poolSize = parseInt(value, 10);
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replSetServersOptions.poolSize = parseInt(value, 10);
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break;
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case 'appname':
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object.appname = decodeURIComponent(value);
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break;
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case 'autoReconnect':
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case 'auto_reconnect':
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serverOptions.auto_reconnect = (value == 'true');
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break;
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case 'minPoolSize':
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throw new Error("minPoolSize not supported");
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case 'maxIdleTimeMS':
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throw new Error("maxIdleTimeMS not supported");
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case 'waitQueueMultiple':
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throw new Error("waitQueueMultiple not supported");
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case 'waitQueueTimeoutMS':
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throw new Error("waitQueueTimeoutMS not supported");
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case 'uuidRepresentation':
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throw new Error("uuidRepresentation not supported");
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case 'ssl':
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if(value == 'prefer') {
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serverOptions.ssl = value;
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replSetServersOptions.ssl = value;
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mongosOptions.ssl = value;
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break;
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}
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serverOptions.ssl = (value == 'true');
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replSetServersOptions.ssl = (value == 'true');
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mongosOptions.ssl = (value == 'true');
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break;
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case 'sslValidate':
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serverOptions.sslValidate = (value == 'true');
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replSetServersOptions.sslValidate = (value == 'true');
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mongosOptions.sslValidate = (value == 'true');
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break;
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case 'replicaSet':
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case 'rs_name':
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replSetServersOptions.rs_name = value;
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break;
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case 'reconnectWait':
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replSetServersOptions.reconnectWait = parseInt(value, 10);
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break;
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case 'retries':
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replSetServersOptions.retries = parseInt(value, 10);
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break;
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case 'readSecondary':
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case 'read_secondary':
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replSetServersOptions.read_secondary = (value == 'true');
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break;
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case 'fsync':
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dbOptions.fsync = (value == 'true');
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break;
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case 'journal':
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dbOptions.j = (value == 'true');
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break;
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case 'safe':
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dbOptions.safe = (value == 'true');
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break;
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case 'nativeParser':
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case 'native_parser':
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dbOptions.native_parser = (value == 'true');
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break;
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case 'readConcernLevel':
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dbOptions.readConcern = {level: value};
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break;
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case 'connectTimeoutMS':
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serverOptions.socketOptions.connectTimeoutMS = parseInt(value, 10);
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replSetServersOptions.socketOptions.connectTimeoutMS = parseInt(value, 10);
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mongosOptions.socketOptions.connectTimeoutMS = parseInt(value, 10);
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break;
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case 'socketTimeoutMS':
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serverOptions.socketOptions.socketTimeoutMS = parseInt(value, 10);
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replSetServersOptions.socketOptions.socketTimeoutMS = parseInt(value, 10);
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mongosOptions.socketOptions.socketTimeoutMS = parseInt(value, 10);
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break;
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case 'w':
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dbOptions.w = parseInt(value, 10);
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if(isNaN(dbOptions.w)) dbOptions.w = value;
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break;
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case 'authSource':
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dbOptions.authSource = value;
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break;
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case 'gssapiServiceName':
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dbOptions.gssapiServiceName = value;
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break;
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case 'authMechanism':
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if(value == 'GSSAPI') {
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// If no password provided decode only the principal
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if(object.auth == null) {
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var urlDecodeAuthPart = decodeURIComponent(authPart);
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if(urlDecodeAuthPart.indexOf("@") == -1) throw new Error("GSSAPI requires a provided principal");
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object.auth = {user: urlDecodeAuthPart, password: null};
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} else {
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object.auth.user = decodeURIComponent(object.auth.user);
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}
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} else if(value == 'MONGODB-X509') {
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object.auth = {user: decodeURIComponent(authPart)};
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}
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// Only support GSSAPI or MONGODB-CR for now
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if(value != 'GSSAPI'
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&& value != 'MONGODB-X509'
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&& value != 'MONGODB-CR'
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&& value != 'DEFAULT'
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&& value != 'SCRAM-SHA-1'
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&& value != 'PLAIN')
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throw new Error("only DEFAULT, GSSAPI, PLAIN, MONGODB-X509, SCRAM-SHA-1 or MONGODB-CR is supported by authMechanism");
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// Authentication mechanism
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dbOptions.authMechanism = value;
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break;
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case 'authMechanismProperties':
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// Split up into key, value pairs
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var values = value.split(',');
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var o = {};
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// For each value split into key, value
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values.forEach(function(x) {
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var v = x.split(':');
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o[v[0]] = v[1];
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});
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// Set all authMechanismProperties
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dbOptions.authMechanismProperties = o;
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// Set the service name value
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if(typeof o.SERVICE_NAME == 'string') dbOptions.gssapiServiceName = o.SERVICE_NAME;
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if(typeof o.SERVICE_REALM == 'string') dbOptions.gssapiServiceRealm = o.SERVICE_REALM;
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if(typeof o.CANONICALIZE_HOST_NAME == 'string') dbOptions.gssapiCanonicalizeHostName = o.CANONICALIZE_HOST_NAME == 'true' ? true : false;
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break;
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case 'wtimeoutMS':
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dbOptions.wtimeout = parseInt(value, 10);
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break;
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case 'readPreference':
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if(!ReadPreference.isValid(value)) throw new Error("readPreference must be either primary/primaryPreferred/secondary/secondaryPreferred/nearest");
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dbOptions.readPreference = value;
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break;
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case 'maxStalenessSeconds':
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dbOptions.maxStalenessSeconds = parseInt(value, 10);
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break;
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case 'readPreferenceTags':
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// Decode the value
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value = decodeURIComponent(value);
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// Contains the tag object
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var tagObject = {};
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if(value == null || value == '') {
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dbOptions.read_preference_tags.push(tagObject);
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break;
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}
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// Split up the tags
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var tags = value.split(/\,/);
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for(var i = 0; i < tags.length; i++) {
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var parts = tags[i].trim().split(/\:/);
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tagObject[parts[0]] = parts[1];
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}
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// Set the preferences tags
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dbOptions.read_preference_tags.push(tagObject);
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break;
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default:
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break;
|
|
}
|
|
});
|
|
|
|
// No tags: should be null (not [])
|
|
if(dbOptions.read_preference_tags.length === 0) {
|
|
dbOptions.read_preference_tags = null;
|
|
}
|
|
|
|
// Validate if there are an invalid write concern combinations
|
|
if((dbOptions.w == -1 || dbOptions.w == 0) && (
|
|
dbOptions.journal == true
|
|
|| dbOptions.fsync == true
|
|
|| dbOptions.safe == true)) throw new Error("w set to -1 or 0 cannot be combined with safe/w/journal/fsync")
|
|
|
|
// If no read preference set it to primary
|
|
if(!dbOptions.readPreference) {
|
|
dbOptions.readPreference = 'primary';
|
|
}
|
|
|
|
// make sure that user-provided options are applied with priority
|
|
dbOptions = assign(dbOptions, options);
|
|
|
|
// Add servers to result
|
|
object.servers = servers;
|
|
|
|
// Returned parsed object
|
|
return object;
|
|
}
|