partial work
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DRAFT
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=====
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This is just hypothetical while I build out the API
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SQLite3 Server
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=============
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Node.js runs on a single core, which isn't very effective.
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You can run multiple Node.js instances to take advantage of multiple cores,
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but if you do that, you can't use SQLite in each process.
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This module will either run client-server style in environments that benefit from it
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(such as the Raspberry Pi 2 with 4 cores), or in-process for environments that don't
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(such as the Raspberry Pi B and B+).
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Usage
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=====
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```js
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var sqlite = require('sqlite3-server');
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var opts = {
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key: '1892d335081d8d346e556c9c3c8ff2c3'
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, bits: 128
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, storage: path.join('/tmp/authn.sqlcipher')
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, verbose: false
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, port: 3232 // default random
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, forceServer: true // default false
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};
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sqlite.create(opts).then(function (db) {
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// EXACT same api as db
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});
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```
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'use strict';
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var path = require('path');
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var numcpus = require('os').cpus().length;
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if (numcpus >= 2) {
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sqlite3 = require('./sqlite-client');
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} else {
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sqlite3 = require('./sqlite3-wrapper');
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}
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module.exports = sqlite3;
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#brew options sqlcipher
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#brew install sqlcipher --with-fts
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echo STOP
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echo You must manually install sqlcipher
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exit 1
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export LDFLAGS="-L`brew --prefix`/opt/sqlcipher/lib"
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export CPPFLAGS="-I`brew --prefix`/opt/sqlcipher/include"
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npm install sqlite3 --build-from-source --sqlite_libname=sqlcipher --sqlite=`brew --prefix`
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node -e 'require("sqlite3")'
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'use strict';
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var server = require('http').createServer();
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var WebSocketServer = require('ws').Server;
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var wss = new WebSocketServer({ server: server });
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var port = process.env.PORT || process.argv[0] || 4080;
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var app = require('./sqlite-server');
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server.listen(port, function () {
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});
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app.create({ server: server, wss: wss }).then(function (app) {
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server.on('request', app);
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});
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'use strict';
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function create(options) {
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var url = require('url');
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var express = require('express');
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var app = express();
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var wss = options.wss;
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wss.on('connection', function (ws) {
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var location = url.parse(ws.upgradeReq.url, true);
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// you might use location.query.access_token to authenticate or share sessions
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// or ws.upgradeReq.headers.cookie (see http://stackoverflow.com/a/16395220/151312
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ws.__session_id = location.query.session_id || Math.random();
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ws.on('message', function (buffer) {
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var cmd;
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try {
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cmd = JSON.parse(buffer.toString('utf8'));
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} catch(e) {
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ws.send(JSON.stringify({ type: 'error', value: { message: e.message, code: "E_PARSE_JSON" } }));
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}
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switch(cmd.type) {
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case 'init':
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break;
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case 'rpc':
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break;
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default:
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break;
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}
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});
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ws.send(JSON.stringify({ type: 'session', value: ws.__session_id }));
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});
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/*
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var tablename = 'authn';
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if (tablename) {
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setup.push(db.runAsync("CREATE TABLE IF NOT EXISTS '" + sanitize(tablename)
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+ "' (id TEXT, secret TEXT, json TEXT, PRIMARY KEY(id))"));
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}
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*/
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/*global Promise*/
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return new Promise(function (resolve) {
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resolve(app);
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});
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}
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module.exports.create = create;
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'use strict';
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/*global Promise*/
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var sqlite3 = require('sqlite3');
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var dbs = {};
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function sanitize(str) {
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return String(str).replace("'", "''");
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}
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function create(opts) {
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var db;
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if (!opts) {
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opts = {};
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}
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if (opts.verbose) {
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sqlite3.verbose();
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}
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if (!dbs[opts.storage] || dbs[opts.storage].__key !== opts.key) {
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dbs[opts.storage] = new sqlite3.Database(opts.storage);
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}
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db = dbs[opts.storage];
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db.__key = opts.key;
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return new Promise(function (resolve, reject) {
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db.serialize(function() {
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var setup = [];
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if (opts.key) {
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// TODO test key length
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if (!opts.bits) {
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opts.bits = 128;
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}
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// TODO db.run(sql, function () { resolve() });
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setup.push(new Promise(function (resolve, reject) {
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db.run("PRAGMA KEY = \"x'" + sanitize(opts.key) + "'\"", [], function (err) {
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if (err) { reject(err); return; }
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resolve(this);
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});
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}));
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setup.push(new Promise(function (resolve, reject) {
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db.run("PRAGMA CIPHER = 'aes-" + sanitize(opts.bits) + "-cbc'", [], function (err) {
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if (err) { reject(err); return; }
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resolve(this);
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});
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}));
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}
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Promise.all(setup).then(function () { resolve(db); }, reject);
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});
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});
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}
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module.exports.sanitize = sanitize;
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module.exports.Database = sqlite3.Database;
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module.exports.create = create;
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