gnu-social/lib/installer.php

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<?php
/**
* StatusNet - the distributed open-source microblogging tool
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* Copyright (C) 2009-2010, StatusNet, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* @category Installation
* @package Installation
*
* @author Adrian Lang <mail@adrianlang.de>
* @author Brenda Wallace <shiny@cpan.org>
* @author Brett Taylor <brett@webfroot.co.nz>
* @author Brion Vibber <brion@pobox.com>
* @author CiaranG <ciaran@ciarang.com>
* @author Craig Andrews <candrews@integralblue.com>
* @author Eric Helgeson <helfire@Erics-MBP.local>
* @author Evan Prodromou <evan@status.net>
* @author Mikael Nordfeldth <mmn@hethane.se>
* @author Robin Millette <millette@controlyourself.ca>
* @author Sarven Capadisli <csarven@status.net>
* @author Tom Adams <tom@holizz.com>
* @author Zach Copley <zach@status.net>
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* @copyright 2009-2010 StatusNet, Inc http://status.net
* @copyright 2009 Free Software Foundation, Inc http://www.fsf.org
* @license GNU Affero General Public License http://www.gnu.org/licenses/
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* @version 1.0.x
* @link http://status.net
*/
abstract class Installer
{
/** Web site info */
public $sitename, $server, $path, $fancy, $siteProfile, $ssl;
/** DB info */
public $host, $database, $dbtype, $username, $password, $db;
/** Administrator info */
public $adminNick, $adminPass, $adminEmail, $adminUpdates;
/** Should we skip writing the configuration file? */
public $skipConfig = false;
public static $dbModules = array(
'mysql' => array(
'name' => 'MySQL',
'check_module' => 'mysqli',
'scheme' => 'mysqli', // DSN prefix for PEAR::DB
),
'pgsql' => array(
'name' => 'PostgreSQL',
'check_module' => 'pgsql',
'scheme' => 'pgsql', // DSN prefix for PEAR::DB
),
);
/**
* Attempt to include a PHP file and report if it worked, while
* suppressing the annoying warning messages on failure.
*/
private function haveIncludeFile($filename) {
$old = error_reporting(error_reporting() & ~E_WARNING);
$ok = include_once($filename);
error_reporting($old);
return $ok;
}
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/**
* Check if all is ready for installation
*
* @return void
*/
function checkPrereqs()
{
$pass = true;
$config = INSTALLDIR.'/config.php';
if (file_exists($config)) {
if (!is_writable($config) || filesize($config) > 0) {
if (filesize($config) == 0) {
$this->warning('Config file "config.php" already exists and is empty, but is not writable.');
} else {
$this->warning('Config file "config.php" already exists.');
}
$pass = false;
}
}
if (version_compare(PHP_VERSION, '5.2.3', '<')) {
$this->warning('Require PHP version 5.2.3 or greater.');
$pass = false;
}
// Look for known library bugs
$str = "abcdefghijklmnopqrstuvwxyz";
$replaced = preg_replace('/[\p{Cc}\p{Cs}]/u', '*', $str);
if ($str != $replaced) {
$this->warning('PHP is linked to a version of the PCRE library ' .
'that does not support Unicode properties. ' .
'If you are running Red Hat Enterprise Linux / ' .
'CentOS 5.4 or earlier, see <a href="' .
'http://status.net/wiki/Red_Hat_Enterprise_Linux#PCRE_library' .
'">our documentation page</a> on fixing this.');
$pass = false;
}
$reqs = array('gd', 'curl',
'xmlwriter', 'mbstring', 'xml', 'dom', 'simplexml');
foreach ($reqs as $req) {
if (!$this->checkExtension($req)) {
$this->warning(sprintf('Cannot load required extension: <code>%s</code>', $req));
$pass = false;
}
}
// Make sure we have at least one database module available
$missingExtensions = array();
foreach (self::$dbModules as $type => $info) {
if (!$this->checkExtension($info['check_module'])) {
$missingExtensions[] = $info['check_module'];
}
}
if (count($missingExtensions) == count(self::$dbModules)) {
$req = implode(', ', $missingExtensions);
$this->warning(sprintf('Cannot find a database extension. You need at least one of %s.', $req));
$pass = false;
}
// @fixme this check seems to be insufficient with Windows ACLs
if (!is_writable(INSTALLDIR)) {
$this->warning(sprintf('Cannot write config file to: <code>%s</code></p>', INSTALLDIR),
sprintf('On your server, try this command: <code>chmod a+w %s</code>', INSTALLDIR));
$pass = false;
}
// Check the subdirs used for file uploads
$fileSubdirs = array('avatar', 'background', 'file');
foreach ($fileSubdirs as $fileSubdir) {
$fileFullPath = INSTALLDIR."/$fileSubdir/";
if (!is_writable($fileFullPath)) {
$this->warning(sprintf('Cannot write to %s directory: <code>%s</code>', $fileSubdir, $fileFullPath),
sprintf('On your server, try this command: <code>chmod a+w %s</code>', $fileFullPath));
$pass = false;
}
}
return $pass;
}
/**
* Checks if a php extension is both installed and loaded
*
* @param string $name of extension to check
*
* @return boolean whether extension is installed and loaded
*/
function checkExtension($name)
{
if (extension_loaded($name)) {
return true;
} elseif (function_exists('dl') && ini_get('enable_dl') && !ini_get('safe_mode')) {
// dl will throw a fatal error if it's disabled or we're in safe mode.
// More fun, it may not even exist under some SAPIs in 5.3.0 or later...
$soname = $name . '.' . PHP_SHLIB_SUFFIX;
if (PHP_SHLIB_SUFFIX == 'dll') {
$soname = "php_" . $soname;
}
return @dl($soname);
} else {
return false;
}
}
/**
* Basic validation on the database paramters
* Side effects: error output if not valid
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*
* @return boolean success
*/
function validateDb()
{
$fail = false;
if (empty($this->host)) {
$this->updateStatus("No hostname specified.", true);
$fail = true;
}
if (empty($this->database)) {
$this->updateStatus("No database specified.", true);
$fail = true;
}
if (empty($this->username)) {
$this->updateStatus("No username specified.", true);
$fail = true;
}
if (empty($this->sitename)) {
$this->updateStatus("No sitename specified.", true);
$fail = true;
}
return !$fail;
}
/**
* Basic validation on the administrator user paramters
* Side effects: error output if not valid
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*
* @return boolean success
*/
function validateAdmin()
{
$fail = false;
if (empty($this->adminNick)) {
$this->updateStatus("No initial StatusNet user nickname specified.", true);
$fail = true;
}
if ($this->adminNick && !preg_match('/^[0-9a-z]{1,64}$/', $this->adminNick)) {
$this->updateStatus('The user nickname "' . htmlspecialchars($this->adminNick) .
'" is invalid; should be plain letters and numbers no longer than 64 characters.', true);
$fail = true;
}
// @fixme hardcoded list; should use User::allowed_nickname()
// if/when it's safe to have loaded the infrastructure here
$blacklist = array('main', 'panel', 'twitter', 'settings', 'rsd.xml', 'favorited', 'featured', 'favoritedrss', 'featuredrss', 'rss', 'getfile', 'api', 'groups', 'group', 'peopletag', 'tag', 'user', 'message', 'conversation', 'bookmarklet', 'notice', 'attachment', 'search', 'index.php', 'doc', 'opensearch', 'robots.txt', 'xd_receiver.html', 'facebook');
if (in_array($this->adminNick, $blacklist)) {
$this->updateStatus('The user nickname "' . htmlspecialchars($this->adminNick) .
'" is reserved.', true);
$fail = true;
}
if (empty($this->adminPass)) {
$this->updateStatus("No initial StatusNet user password specified.", true);
$fail = true;
}
return !$fail;
}
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/**
* Make sure a site profile was selected
*
* @return type boolean success
*/
function validateSiteProfile()
{
$fail = false;
$sprofile = $this->siteProfile;
if (empty($sprofile)) {
$this->updateStatus("No site profile selected.", true);
$fail = true;
}
return !$fail;
}
/**
* Set up the database with the appropriate function for the selected type...
* Saves database info into $this->db.
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*
* @fixme escape things in the connection string in case we have a funny pass etc
* @return mixed array of database connection params on success, false on failure
*/
function setupDatabase()
{
if ($this->db) {
throw new Exception("Bad order of operations: DB already set up.");
}
$this->updateStatus("Starting installation...");
if (empty($this->password)) {
$auth = '';
} else {
$auth = ":$this->password";
}
$scheme = self::$dbModules[$this->dbtype]['scheme'];
$dsn = "{$scheme}://{$this->username}{$auth}@{$this->host}/{$this->database}";
$this->updateStatus("Checking database...");
$conn = $this->connectDatabase($dsn);
// ensure database encoding is UTF8
if ($this->dbtype == 'mysql') {
// @fixme utf8m4 support for mysql 5.5?
// Force the comms charset to utf8 for sanity
// This doesn't currently work. :P
//$conn->executes('set names utf8');
} else if ($this->dbtype == 'pgsql') {
$record = $conn->getRow('SHOW server_encoding');
if ($record->server_encoding != 'UTF8') {
$this->updateStatus("StatusNet requires UTF8 character encoding. Your database is ". htmlentities($record->server_encoding));
return false;
}
}
$res = $this->updateStatus("Creating database tables...");
if (!$this->createCoreTables($conn)) {
$this->updateStatus("Error creating tables.", true);
return false;
}
foreach (array('sms_carrier' => 'SMS carrier',
'notice_source' => 'notice source',
'foreign_services' => 'foreign service')
as $scr => $name) {
$this->updateStatus(sprintf("Adding %s data to database...", $name));
$res = $this->runDbScript($scr.'.sql', $conn);
if ($res === false) {
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$this->updateStatus(sprintf("Can't run %s script.", $name), true);
return false;
}
}
$db = array('type' => $this->dbtype, 'database' => $dsn);
return $db;
}
/**
* Open a connection to the database.
*
* @param <type> $dsn
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* @return <type>
*/
function connectDatabase($dsn)
{
// @fixme move this someplace more sensible
//set_include_path(INSTALLDIR . '/extlib' . PATH_SEPARATOR . get_include_path());
require_once 'DB.php';
return DB::connect($dsn);
}
/**
* Create core tables on the given database connection.
*
* @param DB_common $conn
*/
function createCoreTables(DB_common $conn)
{
$schema = Schema::get($conn);
$tableDefs = $this->getCoreSchema();
foreach ($tableDefs as $name => $def) {
if (defined('DEBUG_INSTALLER')) {
echo " $name ";
}
$schema->ensureTable($name, $def);
}
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return true;
}
/**
* Fetch the core table schema definitions.
*
* @return array of table names => table def arrays
*/
function getCoreSchema()
{
$schema = array();
include INSTALLDIR . '/db/core.php';
return $schema;
}
/**
* Return a parseable PHP literal for the given value.
* This will include quotes for strings, etc.
*
* @param mixed $val
* @return string
*/
function phpVal($val)
{
return var_export($val, true);
}
/**
* Return an array of parseable PHP literal for the given values.
* These will include quotes for strings, etc.
*
* @param mixed $val
* @return array
*/
function phpVals($map)
{
return array_map(array($this, 'phpVal'), $map);
}
/**
* Write a stock configuration file.
*
* @return boolean success
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*
* @fixme escape variables in output in case we have funny chars, apostrophes etc
*/
function writeConf()
{
$vals = $this->phpVals(array(
'sitename' => $this->sitename,
'server' => $this->server,
'path' => $this->path,
'ssl' => in_array($this->ssl, array('never', 'sometimes', 'always'))
? $this->ssl
: 'never',
'db_database' => $this->db['database'],
'db_type' => $this->db['type']
));
// assemble configuration file in a string
$cfg = "<?php\n".
"if (!defined('GNUSOCIAL')) { exit(1); }\n\n".
// site name
"\$config['site']['name'] = {$vals['sitename']};\n\n".
// site location
"\$config['site']['server'] = {$vals['server']};\n".
"\$config['site']['path'] = {$vals['path']}; \n\n".
"\$config['site']['ssl'] = {$vals['ssl']}; \n\n".
// checks if fancy URLs are enabled
($this->fancy ? "\$config['site']['fancy'] = true;\n\n":'').
// database
"\$config['db']['database'] = {$vals['db_database']};\n\n".
($this->db['type'] == 'pgsql' ? "\$config['db']['quote_identifiers'] = true;\n\n":'').
"\$config['db']['type'] = {$vals['db_type']};\n\n";
// Auto memcache support detection
$cfg .= '
foreach(array("Memcache", "Memcached") as $plugin) :
if (class_exists($plugin)) {
addPlugin($plugin);
break;
}
endforeach;
';
// Normalize line endings for Windows servers
$cfg = str_replace("\n", PHP_EOL, $cfg);
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// write configuration file out to install directory
$res = file_put_contents(INSTALLDIR.'/config.php', $cfg);
return $res;
}
/**
* Write the site profile. We do this after creating the initial user
* in case the site profile is set to single user. This gets around the
* 'chicken-and-egg' problem of the system requiring a valid user for
* single user mode, before the intial user is actually created. Yeah,
* we should probably do this in smarter way.
*
* @return int res number of bytes written
*/
function writeSiteProfile()
{
$vals = $this->phpVals(array(
'site_profile' => $this->siteProfile,
'nickname' => $this->adminNick
));
$cfg =
// site profile
"\$config['site']['profile'] = {$vals['site_profile']};\n";
if ($this->siteProfile == "singleuser") {
$cfg .= "\$config['singleuser']['nickname'] = {$vals['nickname']};\n\n";
} else {
$cfg .= "\n";
}
// Normalize line endings for Windows servers
$cfg = str_replace("\n", PHP_EOL, $cfg);
// write configuration file out to install directory
$res = file_put_contents(INSTALLDIR.'/config.php', $cfg, FILE_APPEND);
return $res;
}
/**
* Install schema into the database
*
* @param string $filename location of database schema file
* @param DB_common $conn connection to database
*
* @return boolean - indicating success or failure
*/
function runDbScript($filename, DB_common $conn)
{
$sql = trim(file_get_contents(INSTALLDIR . '/db/' . $filename));
$stmts = explode(';', $sql);
foreach ($stmts as $stmt) {
$stmt = trim($stmt);
if (!mb_strlen($stmt)) {
continue;
}
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try {
$res = $conn->simpleQuery($stmt);
} catch (Exception $e) {
$error = $e->getMessage();
$this->updateStatus("ERROR ($error) for SQL '$stmt'");
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return false;
}
}
return true;
}
/**
* Create the initial admin user account.
* Side effect: may load portions of StatusNet framework.
* Side effect: outputs program info
*/
function registerInitialUser()
{
require_once INSTALLDIR . '/lib/common.php';
$data = array('nickname' => $this->adminNick,
'password' => $this->adminPass,
'fullname' => $this->adminNick);
if ($this->adminEmail) {
$data['email'] = $this->adminEmail;
}
$user = User::register($data);
if (empty($user)) {
return false;
}
// give initial user carte blanche
$user->grantRole('owner');
$user->grantRole('moderator');
$user->grantRole('administrator');
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// Attempt to do a remote subscribe to update@status.net
// Will fail if instance is on a private network.
if ($this->adminUpdates && class_exists('Ostatus_profile')) {
try {
$oprofile = Ostatus_profile::ensureProfileURL('http://update.status.net/');
Subscription::start($user->getProfile(), $oprofile->localProfile());
$this->updateStatus("Set up subscription to <a href='http://update.status.net/'>update@status.net</a>.");
} catch (Exception $e) {
$this->updateStatus("Could not set up subscription to <a href='http://update.status.net/'>update@status.net</a>.", true);
}
}
return true;
}
/**
* The beef of the installer!
* Create database, config file, and admin user.
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*
* Prerequisites: validation of input data.
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*
* @return boolean success
*/
function doInstall()
{
$this->updateStatus("Initializing...");
ini_set('display_errors', 1);
error_reporting(E_ALL);
if (!defined('GNUSOCIAL')) {
define('GNUSOCIAL', true);
}
if (!defined('STATUSNET')) {
define('STATUSNET', true);
}
require_once INSTALLDIR . '/lib/framework.php';
StatusNet::initDefaults($this->server, $this->path);
try {
$this->db = $this->setupDatabase();
if (!$this->db) {
// database connection failed, do not move on to create config file.
return false;
}
} catch (Exception $e) {
// Lower-level DB error!
$this->updateStatus("Database error: " . $e->getMessage(), true);
return false;
}
// Make sure we can write to the file twice
$oldUmask = umask(000);
if (!$this->skipConfig) {
$this->updateStatus("Writing config file...");
$res = $this->writeConf();
if (!$res) {
$this->updateStatus("Can't write config file.", true);
return false;
}
}
if (!empty($this->adminNick)) {
// Okay, cross fingers and try to register an initial user
if ($this->registerInitialUser()) {
$this->updateStatus(
"An initial user with the administrator role has been created."
);
} else {
$this->updateStatus(
"Could not create initial StatusNet user (administrator).",
true
);
return false;
}
}
if (!$this->skipConfig) {
$this->updateStatus("Setting site profile...");
$res = $this->writeSiteProfile();
if (!$res) {
$this->updateStatus("Can't write to config file.", true);
return false;
}
}
// Restore original umask
umask($oldUmask);
// Set permissions back to something decent
chmod(INSTALLDIR.'/config.php', 0644);
/*
TODO https needs to be considered
*/
$link = "http://".$this->server.'/'.$this->path;
$this->updateStatus("StatusNet has been installed at $link");
$this->updateStatus(
"<strong>DONE!</strong> You can visit your <a href='$link'>new StatusNet site</a> (login as '$this->adminNick'). If this is your first StatusNet install, you may want to poke around our <a href='http://status.net/wiki/Getting_started'>Getting Started guide</a>."
);
return true;
}
/**
* Output a pre-install-time warning message
* @param string $message HTML ok, but should be plaintext-able
* @param string $submessage HTML ok, but should be plaintext-able
*/
abstract function warning($message, $submessage='');
/**
* Output an install-time progress message
* @param string $message HTML ok, but should be plaintext-able
* @param boolean $error true if this should be marked as an error condition
*/
abstract function updateStatus($status, $error=false);
}