gecko/toolkit/components/satchel/nsFormHistory.js

981 lines
32 KiB
JavaScript

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
const Cc = Components.classes;
const Ci = Components.interfaces;
const Cr = Components.results;
Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
Components.utils.import("resource://gre/modules/Services.jsm");
const DB_VERSION = 4;
const DAY_IN_MS = 86400000; // 1 day in milliseconds
function FormHistory() {
this.init();
}
FormHistory.prototype = {
classID : Components.ID("{0c1bb408-71a2-403f-854a-3a0659829ded}"),
QueryInterface : XPCOMUtils.generateQI([Ci.nsIFormHistory2,
Ci.nsIObserver,
Ci.nsIFrameMessageListener,
Ci.nsISupportsWeakReference,
]),
debug : true,
enabled : true,
saveHttpsForms : true,
// The current database schema.
dbSchema : {
tables : {
moz_formhistory: {
"id" : "INTEGER PRIMARY KEY",
"fieldname" : "TEXT NOT NULL",
"value" : "TEXT NOT NULL",
"timesUsed" : "INTEGER",
"firstUsed" : "INTEGER",
"lastUsed" : "INTEGER",
"guid" : "TEXT"
},
moz_deleted_formhistory: {
"id" : "INTEGER PRIMARY KEY",
"timeDeleted" : "INTEGER",
"guid" : "TEXT"
}
},
indices : {
moz_formhistory_index : {
table : "moz_formhistory",
columns : ["fieldname"]
},
moz_formhistory_lastused_index : {
table : "moz_formhistory",
columns : ["lastUsed"]
},
moz_formhistory_guid_index : {
table : "moz_formhistory",
columns : ["guid"]
},
}
},
dbStmts : null, // Database statements for memoization
dbFile : null,
_uuidService: null,
get uuidService() {
if (!this._uuidService)
this._uuidService = Cc["@mozilla.org/uuid-generator;1"].
getService(Ci.nsIUUIDGenerator);
return this._uuidService;
},
// Private Browsing Service
// If the service is not available, null will be returned.
_privBrowsingSvc : undefined,
get privBrowsingSvc() {
if (this._privBrowsingSvc == undefined) {
if ("@mozilla.org/privatebrowsing;1" in Cc)
this._privBrowsingSvc = Cc["@mozilla.org/privatebrowsing;1"].
getService(Ci.nsIPrivateBrowsingService);
else
this._privBrowsingSvc = null;
}
return this._privBrowsingSvc;
},
log : function log(message) {
if (!this.debug)
return;
dump("FormHistory: " + message + "\n");
Services.console.logStringMessage("FormHistory: " + message);
},
init : function init() {
Services.prefs.addObserver("browser.formfill.", this, true);
this.updatePrefs();
this.dbStmts = {};
this.messageManager = Cc["@mozilla.org/globalmessagemanager;1"].
getService(Ci.nsIChromeFrameMessageManager);
this.messageManager.loadFrameScript("chrome://satchel/content/formSubmitListener.js", true);
this.messageManager.addMessageListener("FormHistory:FormSubmitEntries", this);
// Add observers
Services.obs.addObserver(this, "profile-before-change", true);
Services.obs.addObserver(this, "idle-daily", true);
Services.obs.addObserver(this, "formhistory-expire-now", true);
},
/* ---- message listener ---- */
receiveMessage: function receiveMessage(message) {
// Open a transaction so multiple adds happen in one commit
this.dbConnection.beginTransaction();
try {
let entries = message.json;
for (let i = 0; i < entries.length; i++) {
this.addEntry(entries[i].name, entries[i].value);
}
} finally {
// Don't need it to be atomic if there was an error. Commit what
// we managed to put in the table.
this.dbConnection.commitTransaction();
}
},
/* ---- nsIFormHistory2 interfaces ---- */
get hasEntries() {
return (this.countAllEntries() > 0);
},
addEntry : function addEntry(name, value) {
if (!this.enabled ||
this.privBrowsingSvc && this.privBrowsingSvc.privateBrowsingEnabled)
return;
this.log("addEntry for " + name + "=" + value);
let now = Date.now() * 1000; // microseconds
let [id, guid] = this.getExistingEntryID(name, value);
let stmt;
if (id != -1) {
// Update existing entry.
let query = "UPDATE moz_formhistory SET timesUsed = timesUsed + 1, lastUsed = :lastUsed WHERE id = :id";
let params = {
lastUsed : now,
id : id
};
try {
stmt = this.dbCreateStatement(query, params);
stmt.execute();
this.sendStringNotification("modifyEntry", name, value, guid);
} catch (e) {
this.log("addEntry (modify) failed: " + e);
throw e;
} finally {
if (stmt) {
stmt.reset();
}
}
} else {
// Add new entry.
guid = this.generateGUID();
let query = "INSERT INTO moz_formhistory (fieldname, value, timesUsed, firstUsed, lastUsed, guid) " +
"VALUES (:fieldname, :value, :timesUsed, :firstUsed, :lastUsed, :guid)";
let params = {
fieldname : name,
value : value,
timesUsed : 1,
firstUsed : now,
lastUsed : now,
guid : guid
};
try {
stmt = this.dbCreateStatement(query, params);
stmt.execute();
this.sendStringNotification("addEntry", name, value, guid);
} catch (e) {
this.log("addEntry (create) failed: " + e);
throw e;
} finally {
if (stmt) {
stmt.reset();
}
}
}
},
removeEntry : function removeEntry(name, value) {
this.log("removeEntry for " + name + "=" + value);
let [id, guid] = this.getExistingEntryID(name, value);
this.sendStringNotification("before-removeEntry", name, value, guid);
let stmt;
let query = "DELETE FROM moz_formhistory WHERE id = :id";
let params = { id : id };
let existingTransactionInProgress;
try {
// Don't start a transaction if one is already in progress since we can't nest them.
existingTransactionInProgress = this.dbConnection.transactionInProgress;
if (!existingTransactionInProgress)
this.dbConnection.beginTransaction();
this.moveToDeletedTable("VALUES (:guid, :timeDeleted)", {
guid: guid,
timeDeleted: Date.now()
});
// remove from the formhistory database
stmt = this.dbCreateStatement(query, params);
stmt.execute();
this.sendStringNotification("removeEntry", name, value, guid);
} catch (e) {
if (!existingTransactionInProgress)
this.dbConnection.rollbackTransaction();
this.log("removeEntry failed: " + e);
throw e;
} finally {
if (stmt) {
stmt.reset();
}
}
if (!existingTransactionInProgress)
this.dbConnection.commitTransaction();
},
removeEntriesForName : function removeEntriesForName(name) {
this.log("removeEntriesForName with name=" + name);
this.sendStringNotification("before-removeEntriesForName", name);
let stmt;
let query = "DELETE FROM moz_formhistory WHERE fieldname = :fieldname";
let params = { fieldname : name };
let existingTransactionInProgress;
try {
// Don't start a transaction if one is already in progress since we can't nest them.
existingTransactionInProgress = this.dbConnection.transactionInProgress;
if (!existingTransactionInProgress)
this.dbConnection.beginTransaction();
this.moveToDeletedTable(
"SELECT guid, :timeDeleted FROM moz_formhistory " +
"WHERE fieldname = :fieldname", {
fieldname: name,
timeDeleted: Date.now()
});
stmt = this.dbCreateStatement(query, params);
stmt.execute();
this.sendStringNotification("removeEntriesForName", name);
} catch (e) {
if (!existingTransactionInProgress)
this.dbConnection.rollbackTransaction();
this.log("removeEntriesForName failed: " + e);
throw e;
} finally {
if (stmt) {
stmt.reset();
}
}
if (!existingTransactionInProgress)
this.dbConnection.commitTransaction();
},
removeAllEntries : function removeAllEntries() {
this.log("removeAllEntries");
this.sendNotification("before-removeAllEntries", null);
let stmt;
let query = "DELETE FROM moz_formhistory";
let existingTransactionInProgress;
try {
// Don't start a transaction if one is already in progress since we can't nest them.
existingTransactionInProgress = this.dbConnection.transactionInProgress;
if (!existingTransactionInProgress)
this.dbConnection.beginTransaction();
// TODO: Add these items to the deleted items table once we've sorted
// out the issues from bug 756701
stmt = this.dbCreateStatement(query);
stmt.execute();
this.sendNotification("removeAllEntries", null);
} catch (e) {
if (!existingTransactionInProgress)
this.dbConnection.rollbackTransaction();
this.log("removeAllEntries failed: " + e);
throw e;
} finally {
if (stmt) {
stmt.reset();
}
}
if (!existingTransactionInProgress)
this.dbConnection.commitTransaction();
},
nameExists : function nameExists(name) {
this.log("nameExists for name=" + name);
let stmt;
let query = "SELECT COUNT(1) AS numEntries FROM moz_formhistory WHERE fieldname = :fieldname";
let params = { fieldname : name };
try {
stmt = this.dbCreateStatement(query, params);
stmt.executeStep();
return (stmt.row.numEntries > 0);
} catch (e) {
this.log("nameExists failed: " + e);
throw e;
} finally {
if (stmt) {
stmt.reset();
}
}
},
entryExists : function entryExists(name, value) {
this.log("entryExists for " + name + "=" + value);
let [id, guid] = this.getExistingEntryID(name, value);
this.log("entryExists: id=" + id);
return (id != -1);
},
removeEntriesByTimeframe : function removeEntriesByTimeframe(beginTime, endTime) {
this.log("removeEntriesByTimeframe for " + beginTime + " to " + endTime);
this.sendIntNotification("before-removeEntriesByTimeframe", beginTime, endTime);
let stmt;
let query = "DELETE FROM moz_formhistory WHERE firstUsed >= :beginTime AND firstUsed <= :endTime";
let params = {
beginTime : beginTime,
endTime : endTime
};
let existingTransactionInProgress;
try {
// Don't start a transaction if one is already in progress since we can't nest them.
existingTransactionInProgress = this.dbConnection.transactionInProgress;
if (!existingTransactionInProgress)
this.dbConnection.beginTransaction();
this.moveToDeletedTable(
"SELECT guid, :timeDeleted FROM moz_formhistory " +
"WHERE firstUsed >= :beginTime AND firstUsed <= :endTime", {
beginTime: beginTime,
endTime: endTime
});
stmt = this.dbCreateStatement(query, params);
stmt.executeStep();
this.sendIntNotification("removeEntriesByTimeframe", beginTime, endTime);
} catch (e) {
if (!existingTransactionInProgress)
this.dbConnection.rollbackTransaction();
this.log("removeEntriesByTimeframe failed: " + e);
throw e;
} finally {
if (stmt) {
stmt.reset();
}
}
if (!existingTransactionInProgress)
this.dbConnection.commitTransaction();
},
moveToDeletedTable : function moveToDeletedTable(values, params) {
#ifdef ANDROID
this.log("Moving entries to deleted table.");
let stmt;
try {
// Move the entries to the deleted items table.
let query = "INSERT INTO moz_deleted_formhistory (guid, timeDeleted) ";
if (values) query += values;
stmt = this.dbCreateStatement(query, params);
stmt.execute();
} catch (e) {
this.log("Moving deleted entries failed: " + e);
throw e;
} finally {
if (stmt) {
stmt.reset();
}
}
#endif
},
get dbConnection() {
// Make sure dbConnection can't be called from now to prevent infinite loops.
delete FormHistory.prototype.dbConnection;
try {
this.dbFile = Services.dirsvc.get("ProfD", Ci.nsIFile).clone();
this.dbFile.append("formhistory.sqlite");
this.log("Opening database at " + this.dbFile.path);
FormHistory.prototype.dbConnection = this.dbOpen();
this.dbInit();
} catch (e) {
this.log("Initialization failed: " + e);
// If dbInit fails...
if (e.result == Cr.NS_ERROR_FILE_CORRUPTED) {
this.dbCleanup();
FormHistory.prototype.dbConnection = this.dbOpen();
this.dbInit();
} else {
throw "Initialization failed";
}
}
return FormHistory.prototype.dbConnection;
},
get DBConnection() {
return this.dbConnection;
},
/* ---- nsIObserver interface ---- */
observe : function observe(subject, topic, data) {
switch(topic) {
case "nsPref:changed":
this.updatePrefs();
break;
case "idle-daily":
case "formhistory-expire-now":
this.expireOldEntries();
break;
case "profile-before-change":
this._dbClose(false);
break;
default:
this.log("Oops! Unexpected notification: " + topic);
break;
}
},
/* ---- helpers ---- */
generateGUID : function() {
// string like: "{f60d9eac-9421-4abc-8491-8e8322b063d4}"
let uuid = this.uuidService.generateUUID().toString();
let raw = ""; // A string with the low bytes set to random values
let bytes = 0;
for (let i = 1; bytes < 12 ; i+= 2) {
// Skip dashes
if (uuid[i] == "-")
i++;
let hexVal = parseInt(uuid[i] + uuid[i + 1], 16);
raw += String.fromCharCode(hexVal);
bytes++;
}
return btoa(raw);
},
sendStringNotification : function (changeType, str1, str2, str3) {
function wrapit(str) {
let wrapper = Cc["@mozilla.org/supports-string;1"].
createInstance(Ci.nsISupportsString);
wrapper.data = str;
return wrapper;
}
let strData;
if (arguments.length == 2) {
// Just 1 string, no need to put it in an array
strData = wrapit(str1);
} else {
// 3 strings, put them in an array.
strData = Cc["@mozilla.org/array;1"].
createInstance(Ci.nsIMutableArray);
strData.appendElement(wrapit(str1), false);
strData.appendElement(wrapit(str2), false);
strData.appendElement(wrapit(str3), false);
}
this.sendNotification(changeType, strData);
},
sendIntNotification : function (changeType, int1, int2) {
function wrapit(int) {
let wrapper = Cc["@mozilla.org/supports-PRInt64;1"].
createInstance(Ci.nsISupportsPRInt64);
wrapper.data = int;
return wrapper;
}
let intData;
if (arguments.length == 2) {
// Just 1 int, no need for an array
intData = wrapit(int1);
} else {
// 2 ints, put them in an array.
intData = Cc["@mozilla.org/array;1"].
createInstance(Ci.nsIMutableArray);
intData.appendElement(wrapit(int1), false);
intData.appendElement(wrapit(int2), false);
}
this.sendNotification(changeType, intData);
},
sendNotification : function (changeType, data) {
Services.obs.notifyObservers(data, "satchel-storage-changed", changeType);
},
getExistingEntryID : function (name, value) {
let id = -1, guid = null;
let stmt;
let query = "SELECT id, guid FROM moz_formhistory WHERE fieldname = :fieldname AND value = :value";
let params = {
fieldname : name,
value : value
};
try {
stmt = this.dbCreateStatement(query, params);
if (stmt.executeStep()) {
id = stmt.row.id;
guid = stmt.row.guid;
}
} catch (e) {
this.log("getExistingEntryID failed: " + e);
throw e;
} finally {
if (stmt) {
stmt.reset();
}
}
return [id, guid];
},
countAllEntries : function () {
let query = "SELECT COUNT(1) AS numEntries FROM moz_formhistory";
let stmt, numEntries;
try {
stmt = this.dbCreateStatement(query, null);
stmt.executeStep();
numEntries = stmt.row.numEntries;
} catch (e) {
this.log("countAllEntries failed: " + e);
throw e;
} finally {
if (stmt) {
stmt.reset();
}
}
this.log("countAllEntries: counted entries: " + numEntries);
return numEntries;
},
expireOldEntries : function () {
this.log("expireOldEntries");
// Determine how many days of history we're supposed to keep.
let expireDays = 180;
try {
expireDays = Services.prefs.getIntPref("browser.formfill.expire_days");
} catch (e) { /* ignore */ }
let expireTime = Date.now() - expireDays * DAY_IN_MS;
expireTime *= 1000; // switch to microseconds
this.sendIntNotification("before-expireOldEntries", expireTime);
let beginningCount = this.countAllEntries();
// Purge the form history...
let stmt;
let query = "DELETE FROM moz_formhistory WHERE lastUsed <= :expireTime";
let params = { expireTime : expireTime };
try {
stmt = this.dbCreateStatement(query, params);
stmt.execute();
} catch (e) {
this.log("expireOldEntries failed: " + e);
throw e;
} finally {
if (stmt) {
stmt.reset();
}
}
let endingCount = this.countAllEntries();
// If we expired a large batch of entries, shrink the DB to reclaim wasted
// space. This is expected to happen when entries predating timestamps
// (added in the v.1 schema) expire in mass, 180 days after the DB was
// upgraded -- entries not used since then expire all at once.
if (beginningCount - endingCount > 500)
this.dbConnection.executeSimpleSQL("VACUUM");
this.sendIntNotification("expireOldEntries", expireTime);
},
updatePrefs : function () {
this.debug = Services.prefs.getBoolPref("browser.formfill.debug");
this.enabled = Services.prefs.getBoolPref("browser.formfill.enable");
this.saveHttpsForms = Services.prefs.getBoolPref("browser.formfill.saveHttpsForms");
},
//**************************************************************************//
// Database Creation & Access
/*
* dbCreateStatement
*
* Creates a statement, wraps it, and then does parameter replacement
* Will use memoization so that statements can be reused.
*/
dbCreateStatement : function (query, params) {
let stmt = this.dbStmts[query];
// Memoize the statements
if (!stmt) {
this.log("Creating new statement for query: " + query);
stmt = this.dbConnection.createStatement(query);
this.dbStmts[query] = stmt;
}
// Replace parameters, must be done 1 at a time
if (params)
for (let i in params)
stmt.params[i] = params[i];
return stmt;
},
/*
* dbOpen
*
* Open a connection with the database and returns it.
*
* @returns a db connection object.
*/
dbOpen : function () {
this.log("Open Database");
let storage = Cc["@mozilla.org/storage/service;1"].
getService(Ci.mozIStorageService);
return storage.openDatabase(this.dbFile);
},
/*
* dbInit
*
* Attempts to initialize the database. This creates the file if it doesn't
* exist, performs any migrations, etc.
*/
dbInit : function () {
this.log("Initializing Database");
let version = this.dbConnection.schemaVersion;
// Note: Firefox 3 didn't set a schema value, so it started from 0.
// So we can't depend on a simple version == 0 check
if (version == 0 && !this.dbConnection.tableExists("moz_formhistory"))
this.dbCreate();
else if (version != DB_VERSION)
this.dbMigrate(version);
},
dbCreate: function () {
this.log("Creating DB -- tables");
for (let name in this.dbSchema.tables) {
let table = this.dbSchema.tables[name];
this.dbCreateTable(name, table);
}
this.log("Creating DB -- indices");
for (let name in this.dbSchema.indices) {
let index = this.dbSchema.indices[name];
let statement = "CREATE INDEX IF NOT EXISTS " + name + " ON " + index.table +
"(" + index.columns.join(", ") + ")";
this.dbConnection.executeSimpleSQL(statement);
}
this.dbConnection.schemaVersion = DB_VERSION;
},
dbCreateTable: function(name, table) {
let tSQL = [[col, table[col]].join(" ") for (col in table)].join(", ");
this.log("Creating table " + name + " with " + tSQL);
this.dbConnection.createTable(name, tSQL);
},
dbMigrate : function (oldVersion) {
this.log("Attempting to migrate from version " + oldVersion);
if (oldVersion > DB_VERSION) {
this.log("Downgrading to version " + DB_VERSION);
// User's DB is newer. Sanity check that our expected columns are
// present, and if so mark the lower version and merrily continue
// on. If the columns are borked, something is wrong so blow away
// the DB and start from scratch. [Future incompatible upgrades
// should swtich to a different table or file.]
if (!this.dbAreExpectedColumnsPresent())
throw Components.Exception("DB is missing expected columns",
Cr.NS_ERROR_FILE_CORRUPTED);
// Change the stored version to the current version. If the user
// runs the newer code again, it will see the lower version number
// and re-upgrade (to fixup any entries the old code added).
this.dbConnection.schemaVersion = DB_VERSION;
return;
}
// Upgrade to newer version...
this.dbConnection.beginTransaction();
try {
for (let v = oldVersion + 1; v <= DB_VERSION; v++) {
this.log("Upgrading to version " + v + "...");
let migrateFunction = "dbMigrateToVersion" + v;
this[migrateFunction]();
}
} catch (e) {
this.log("Migration failed: " + e);
this.dbConnection.rollbackTransaction();
throw e;
}
this.dbConnection.schemaVersion = DB_VERSION;
this.dbConnection.commitTransaction();
this.log("DB migration completed.");
},
/*
* dbMigrateToVersion1
*
* Updates the DB schema to v1 (bug 463154).
* Adds firstUsed, lastUsed, timesUsed columns.
*/
dbMigrateToVersion1 : function () {
// Check to see if the new columns already exist (could be a v1 DB that
// was downgraded to v0). If they exist, we don't need to add them.
let query;
["timesUsed", "firstUsed", "lastUsed"].forEach(function(column) {
if (!this.dbColumnExists(column)) {
query = "ALTER TABLE moz_formhistory ADD COLUMN " + column + " INTEGER";
this.dbConnection.executeSimpleSQL(query);
}
}, this);
// Set the default values for the new columns.
//
// Note that we set the timestamps to 24 hours in the past. We want a
// timestamp that's recent (so that "keep form history for 90 days"
// doesn't expire things surprisingly soon), but not so recent that
// "forget the last hour of stuff" deletes all freshly migrated data.
let stmt;
query = "UPDATE moz_formhistory " +
"SET timesUsed = 1, firstUsed = :time, lastUsed = :time " +
"WHERE timesUsed isnull OR firstUsed isnull or lastUsed isnull";
let params = { time: (Date.now() - DAY_IN_MS) * 1000 }
try {
stmt = this.dbCreateStatement(query, params);
stmt.execute();
} catch (e) {
this.log("Failed setting timestamps: " + e);
throw e;
} finally {
if (stmt) {
stmt.reset();
}
}
},
/*
* dbMigrateToVersion2
*
* Updates the DB schema to v2 (bug 243136).
* Adds lastUsed index, removes moz_dummy_table
*/
dbMigrateToVersion2 : function () {
let query = "DROP TABLE IF EXISTS moz_dummy_table";
this.dbConnection.executeSimpleSQL(query);
query = "CREATE INDEX IF NOT EXISTS moz_formhistory_lastused_index ON moz_formhistory (lastUsed)";
this.dbConnection.executeSimpleSQL(query);
},
/*
* dbMigrateToVersion3
*
* Updates the DB schema to v3 (bug 506402).
* Adds guid column and index.
*/
dbMigrateToVersion3 : function () {
// Check to see if GUID column already exists, add if needed
let query;
if (!this.dbColumnExists("guid")) {
query = "ALTER TABLE moz_formhistory ADD COLUMN guid TEXT";
this.dbConnection.executeSimpleSQL(query);
query = "CREATE INDEX IF NOT EXISTS moz_formhistory_guid_index ON moz_formhistory (guid)";
this.dbConnection.executeSimpleSQL(query);
}
// Get a list of IDs for existing logins
let ids = [];
query = "SELECT id FROM moz_formhistory WHERE guid isnull";
let stmt;
try {
stmt = this.dbCreateStatement(query);
while (stmt.executeStep())
ids.push(stmt.row.id);
} catch (e) {
this.log("Failed getting IDs: " + e);
throw e;
} finally {
if (stmt) {
stmt.reset();
}
}
// Generate a GUID for each login and update the DB.
query = "UPDATE moz_formhistory SET guid = :guid WHERE id = :id";
for each (let id in ids) {
let params = {
id : id,
guid : this.generateGUID()
};
try {
stmt = this.dbCreateStatement(query, params);
stmt.execute();
} catch (e) {
this.log("Failed setting GUID: " + e);
throw e;
} finally {
if (stmt) {
stmt.reset();
}
}
}
},
dbMigrateToVersion4 : function () {
if (!this.dbConnection.tableExists("moz_deleted_formhistory")) {
this.dbCreateTable("moz_deleted_formhistory", this.dbSchema.tables.moz_deleted_formhistory);
}
},
/*
* dbAreExpectedColumnsPresent
*
* Sanity check to ensure that the columns this version of the code expects
* are present in the DB we're using.
*/
dbAreExpectedColumnsPresent : function () {
for (let name in this.dbSchema.tables) {
let table = this.dbSchema.tables[name];
let query = "SELECT " +
[col for (col in table)].join(", ") +
" FROM " + name;
try {
let stmt = this.dbConnection.createStatement(query);
// (no need to execute statement, if it compiled we're good)
stmt.finalize();
} catch (e) {
return false;
}
}
this.log("verified that expected columns are present in DB.");
return true;
},
/*
* dbColumnExists
*
* Checks to see if the named column already exists.
*/
dbColumnExists : function (columnName) {
let query = "SELECT " + columnName + " FROM moz_formhistory";
try {
let stmt = this.dbConnection.createStatement(query);
// (no need to execute statement, if it compiled we're good)
stmt.finalize();
return true;
} catch (e) {
return false;
}
},
/**
* _dbClose
*
* Finalize all statements and close the connection.
*
* @param aBlocking - Should we spin the loop waiting for the db to be
* closed.
*/
_dbClose : function FH__dbClose(aBlocking) {
for each (let stmt in this.dbStmts) {
stmt.finalize();
}
this.dbStmts = {};
if (this.dbConnection === undefined)
return;
let completed = false;
try {
this.dbConnection.asyncClose(function () { completed = true; });
} catch (e) {
completed = true;
Components.utils.reportError(e);
}
let thread = Services.tm.currentThread;
while (aBlocking && !completed) {
thread.processNextEvent(true);
}
},
/*
* dbCleanup
*
* Called when database creation fails. Finalizes database statements,
* closes the database connection, deletes the database file.
*/
dbCleanup : function () {
this.log("Cleaning up DB file - close & remove & backup")
// Create backup file
let storage = Cc["@mozilla.org/storage/service;1"].
getService(Ci.mozIStorageService);
let backupFile = this.dbFile.leafName + ".corrupt";
storage.backupDatabaseFile(this.dbFile, backupFile);
this._dbClose(true);
this.dbFile.remove(false);
}
};
let component = [FormHistory];
var NSGetFactory = XPCOMUtils.generateNSGetFactory(component);