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reviewer's feedback: SQLite: now using static strings + bound parameters
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gorhill
parent
56ac5a1105
commit
53fc1063f9
1 changed files with 137 additions and 116 deletions
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@ -93,51 +93,53 @@ window.addEventListener('unload', function() {
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/******************************************************************************/
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var SQLite = {
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open: function() {
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// API matches that of chrome.storage.local:
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// https://developer.chrome.com/extensions/storage
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vAPI.storage = (function() {
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var db = null;
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var close = function() {
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if ( db === null ) {
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return;
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}
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db.createStatement('VACUUM').executeAsync();
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db.asyncClose();
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db = null;
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};
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var open = function() {
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if ( db !== null ) {
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return;
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}
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// Create path
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var path = Services.dirsvc.get('ProfD', Ci.nsIFile);
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path.append('extension-data');
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if ( !path.exists() ) {
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path.create(Ci.nsIFile.DIRECTORY_TYPE, parseInt('0774', 8));
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}
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if ( !path.isDirectory() ) {
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throw Error('Should be a directory...');
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}
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path.append(location.host + '.sqlite');
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this.db = Services.storage.openDatabase(path);
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this.db.executeSimpleSQL(
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'CREATE TABLE IF NOT EXISTS settings' +
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'(name TEXT PRIMARY KEY NOT NULL, value TEXT);'
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);
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cleanupTasks.push(function() {
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// VACUUM somewhere else, instead on unload?
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SQLite.run('VACUUM');
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SQLite.db.asyncClose();
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});
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},
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// Open database
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db = Services.storage.openDatabase(path);
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run: function(query, values, callback) {
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if ( !this.db ) {
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this.open();
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}
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// Database was opened, register cleanup task
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cleanupTasks.push(close);
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// Setup database
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db.createAsyncStatement('CREATE TABLE IF NOT EXISTS settings(name TEXT PRIMARY KEY NOT NULL, value TEXT);')
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.executeAsync();
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};
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// Execute a query
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var runStatement = function(stmt, callback) {
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var result = {};
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query = this.db.createAsyncStatement(query);
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if ( Array.isArray(values) && values.length ) {
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var i = values.length;
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while ( i-- ) {
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query.bindByIndex(i, values[i]);
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}
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}
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query.executeAsync({
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stmt.executeAsync({
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handleResult: function(rows) {
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if ( !rows || typeof callback !== 'function' ) {
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return;
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@ -160,120 +162,139 @@ var SQLite = {
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console.error('SQLite error ', error.result, error.message);
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}
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});
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}
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};
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};
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/******************************************************************************/
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vAPI.storage = {
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QUOTA_BYTES: 100 * 1024 * 1024,
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sqlWhere: function(col, params) {
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if ( params > 0 ) {
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params = new Array(params + 1).join('?, ').slice(0, -2);
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return ' WHERE ' + col + ' IN (' + params + ')';
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var bindNames = function(stmt, names) {
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if ( Array.isArray(names) === false || names.length === 0 ) {
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return;
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}
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var params = stmt.newBindingParamsArray();
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var i = names.length, bp;
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while ( i-- ) {
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bp = params.newBindingParams();
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bp.bindByName('name', names[i]);
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params.addParams(bp);
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}
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stmt.bindParameters(params);
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};
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return '';
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},
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var clear = function(callback) {
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if ( db === null ) {
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open();
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}
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runStatement(db.createStatement('DELETE FROM settings; VACUUM;'), callback);
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};
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get: function(details, callback) {
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var getBytesInUse = function(keys, callback) {
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if ( typeof callback !== 'function' ) {
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return;
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}
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var values = [], defaults = false;
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if ( db === null ) {
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open();
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}
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var stmt;
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if ( Array.isArray(keys) ) {
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stmt = db.createStatement('SELECT "size" AS size, SUM(LENGTH(value)) FROM settings WHERE name = :name');
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bindNames(keys);
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} else {
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stmt = db.createStatement('SELECT "size" AS size, SUM(LENGTH(value)) FROM settings');
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}
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runStatement(stmt, function(result) {
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callback(result.size);
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});
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};
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var read = function(details, callback) {
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if ( typeof callback !== 'function' ) {
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return;
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}
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if ( db === null ) {
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open();
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}
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var names = [];
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if ( details !== null ) {
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if ( Array.isArray(details) ) {
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values = details;
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names = details;
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} else if ( typeof details === 'object' ) {
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defaults = true;
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values = Object.keys(details);
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names = Object.keys(details);
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} else {
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values = [details.toString()];
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names = [details.toString()];
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}
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}
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SQLite.run(
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'SELECT * FROM settings' + this.sqlWhere('name', values.length),
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values,
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function(result) {
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var key;
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var stmt;
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if ( names.length === 0 ) {
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stmt = db.createStatement('SELECT * FROM settings');
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} else {
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stmt = db.createStatement('SELECT * FROM settings WHERE name = :name');
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bindNames(stmt, names);
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}
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for ( key in result ) {
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result[key] = JSON.parse(result[key]);
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}
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if ( defaults ) {
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for ( key in details ) {
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if ( result[key] === undefined ) {
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result[key] = details[key];
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}
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runStatement(stmt, function(result) {
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var key;
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for ( key in result ) {
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result[key] = JSON.parse(result[key]);
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}
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if ( typeof details === 'object' && details !== null ) {
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for ( key in details ) {
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if ( result.hasOwnProperty(key) === false ) {
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result[key] = details[key];
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}
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}
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callback(result);
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}
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);
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},
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callback(result);
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});
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};
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set: function(details, callback) {
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var key, values = [], placeholders = [];
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var remove = function(keys, callback) {
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if ( db === null ) {
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open();
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}
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var stmt = db.createStatement('DELETE FROM settings WHERE name = :name');
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bindNames(stmt, typeof keys === 'string' ? [keys] : keys);
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runStatement(stmt, callback);
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};
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for ( key in details ) {
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if ( !details.hasOwnProperty(key) ) {
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var write = function(details, callback) {
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if ( db === null ) {
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open();
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}
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var stmt = db.createStatement('INSERT OR REPLACE INTO settings (name, value) VALUES(:name, :value)');
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var params = stmt.newBindingParamsArray(), bp;
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for ( var key in details ) {
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if ( details.hasOwnProperty(key) === false ) {
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continue;
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}
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values.push(key);
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values.push(JSON.stringify(details[key]));
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placeholders.push('?, ?');
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bp = params.newBindingParams();
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bp.bindByName('name', key);
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bp.bindByName('value', JSON.stringify(details[key]));
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params.addParams(bp);
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}
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if ( !values.length ) {
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if ( params.length === 0 ) {
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return;
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}
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SQLite.run(
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'INSERT OR REPLACE INTO settings (name, value) SELECT ' +
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placeholders.join(' UNION SELECT '),
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values,
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callback
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);
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},
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stmt.bindParameters(params);
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runStatement(stmt, callback);
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};
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remove: function(keys, callback) {
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if ( typeof keys === 'string' ) {
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keys = [keys];
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}
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SQLite.run(
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'DELETE FROM settings' + this.sqlWhere('name', keys.length),
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keys,
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callback
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);
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},
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clear: function(callback) {
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SQLite.run('DELETE FROM settings');
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SQLite.run('VACUUM', null, callback);
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},
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getBytesInUse: function(keys, callback) {
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if ( typeof callback !== 'function' ) {
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return;
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}
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SQLite.run(
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'SELECT "size" AS size, SUM(LENGTH(value)) FROM settings' +
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this.sqlWhere('name', Array.isArray(keys) ? keys.length : 0),
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keys,
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function(result) {
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callback(result.size);
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}
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);
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}
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};
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// Export API
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var api = {
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QUOTA_BYTES: 100 * 1024 * 1024,
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clear: clear,
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get: read,
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getBytesInUse: getBytesInUse,
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remove: remove,
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set: write
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};
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return api;
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})();
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/******************************************************************************/
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