gnu-social/lib/installer.php

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<?php
/**
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2009, 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 Robin Millette <millette@controlyourself.ca>
* @author Sarven Capadisli <csarven@status.net>
* @author Tom Adams <tom@holizz.com>
* @author Zach Copley <zach@status.net>
* @license GNU Affero General Public License http://www.gnu.org/licenses/
* @version 0.9.x
* @link http://status.net
*/
abstract class Installer
{
/** Web site info */
public $sitename, $server, $path, $fancy;
/** DB info */
public $host, $dbname, $dbtype, $username, $password, $db;
/** Administrator info */
public $adminNick, $adminPass, $adminEmail, $adminUpdates;
/** Should we skip writing the configuration file? */
public $skipConfig = false;
public static $dbModules = array(
'mysql' => array(
'name' => 'MySQL',
'check_module' => 'mysqli',
'installer' => 'mysql_db_installer',
),
'pgsql' => array(
'name' => 'PostgreSQL',
'check_module' => 'pgsql',
'installer' => 'pgsql_db_installer',
),
);
/**
* Attempt to include a PHP file and report if it worked, while
* suppressing the annoying warning messages on failure.
*/
private function haveIncludeFile($filename) {
$old = error_reporting(error_reporting() & ~E_WARNING);
$ok = include_once($filename);
error_reporting($old);
return $ok;
}
/**
* 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) {
$this->warning('Config file "config.php" already exists.');
$pass = false;
}
}
if (version_compare(PHP_VERSION, '5.2.3', '<')) {
$errors[] = '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
*
* @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
*
* @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
$blacklist = array('main', 'admin', 'twitter', 'settings', 'rsd.xml', 'favorited', 'featured', 'favoritedrss', 'featuredrss', 'rss', 'getfile', 'api', 'groups', 'group', 'peopletag', 'tag', 'user', 'message', 'conversation', 'bookmarklet', 'notice', 'attachment', 'search', 'index.php', 'doc', 'opensearch', 'robots.txt', 'xd_receiver.html', 'facebook');
if (in_array($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;
}
/**
* Set up the database with the appropriate function for the selected type...
* Saves database info into $this->db.
*
* @return mixed array of database connection params on success, false on failure
*/
function setupDatabase()
{
if ($this->db) {
throw new Exception("Bad order of operations: DB already set up.");
}
$method = self::$dbModules[$this->dbtype]['installer'];
$db = call_user_func(array($this, $method),
$this->host,
$this->database,
$this->username,
$this->password);
$this->db = $db;
return $this->db;
}
/**
* Set up a database on PostgreSQL.
* Will output status updates during the operation.
*
* @param string $host
* @param string $database
* @param string $username
* @param string $password
* @return mixed array of database connection params on success, false on failure
*
* @fixme escape things in the connection string in case we have a funny pass etc
*/
function Pgsql_Db_installer($host, $database, $username, $password)
{
$connstring = "dbname=$database host=$host user=$username";
//No password would mean trust authentication used.
if (!empty($password)) {
$connstring .= " password=$password";
}
$this->updateStatus("Starting installation...");
$this->updateStatus("Checking database...");
$conn = pg_connect($connstring);
if ($conn ===false) {
$this->updateStatus("Failed to connect to database: $connstring");
return false;
}
//ensure database encoding is UTF8
$record = pg_fetch_object(pg_query($conn, 'SHOW server_encoding'));
if ($record->server_encoding != 'UTF8') {
$this->updateStatus("StatusNet requires UTF8 character encoding. Your database is ". htmlentities($record->server_encoding));
return false;
}
$this->updateStatus("Running database script...");
//wrap in transaction;
pg_query($conn, 'BEGIN');
$res = $this->runDbScript('statusnet_pg.sql', $conn, 'pgsql');
if ($res === false) {
$this->updateStatus("Can't run database script.", 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', $conn, 'pgsql');
if ($res === false) {
$this->updateStatus(sprintf("Can't run %d script.", $name), true);
return false;
}
}
pg_query($conn, 'COMMIT');
if (empty($password)) {
$sqlUrl = "pgsql://$username@$host/$database";
} else {
$sqlUrl = "pgsql://$username:$password@$host/$database";
}
$db = array('type' => 'pgsql', 'database' => $sqlUrl);
return $db;
}
/**
* Set up a database on MySQL.
* Will output status updates during the operation.
*
* @param string $host
* @param string $database
* @param string $username
* @param string $password
* @return mixed array of database connection params on success, false on failure
*
* @fixme escape things in the connection string in case we have a funny pass etc
*/
function Mysql_Db_installer($host, $database, $username, $password)
{
$this->updateStatus("Starting installation...");
$this->updateStatus("Checking database...");
$conn = mysqli_init();
if (!$conn->real_connect($host, $username, $password)) {
$this->updateStatus("Can't connect to server '$host' as '$username'.", true);
return false;
}
$this->updateStatus("Changing to database...");
if (!$conn->select_db($database)) {
$this->updateStatus("Can't change to database.", true);
return false;
}
$this->updateStatus("Running database script...");
$res = $this->runDbScript('statusnet.sql', $conn);
if ($res === false) {
$this->updateStatus("Can't run database script.", 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) {
$this->updateStatus(sprintf("Can't run %d script.", $name), true);
return false;
}
}
$sqlUrl = "mysqli://$username:$password@$host/$database";
$db = array('type' => 'mysql', 'database' => $sqlUrl);
return $db;
}
/**
* Write a stock configuration file.
*
* @return boolean success
*
* @fixme escape variables in output in case we have funny chars, apostrophes etc
*/
function writeConf()
{
// assemble configuration file in a string
$cfg = "<?php\n".
"if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }\n\n".
// site name
"\$config['site']['name'] = '{$this->sitename}';\n\n".
// site location
"\$config['site']['server'] = '{$this->server}';\n".
"\$config['site']['path'] = '{$this->path}'; \n\n".
// checks if fancy URLs are enabled
($this->fancy ? "\$config['site']['fancy'] = true;\n\n":'').
// database
"\$config['db']['database'] = '{$this->db['database']}';\n\n".
($this->db['type'] == 'pgsql' ? "\$config['db']['quote_identifiers'] = true;\n\n":'').
"\$config['db']['type'] = '{$this->db['type']}';\n\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);
return $res;
}
/**
* Install schema into the database
*
* @param string $filename location of database schema file
* @param dbconn $conn connection to database
* @param string $type type of database, currently mysql or pgsql
*
* @return boolean - indicating success or failure
*/
function runDbScript($filename, $conn, $type = 'mysqli')
{
$sql = trim(file_get_contents(INSTALLDIR . '/db/' . $filename));
$stmts = explode(';', $sql);
foreach ($stmts as $stmt) {
$stmt = trim($stmt);
if (!mb_strlen($stmt)) {
continue;
}
// FIXME: use PEAR::DB or PDO instead of our own switch
switch ($type) {
case 'mysqli':
$res = $conn->query($stmt);
if ($res === false) {
$error = $conn->error();
}
break;
case 'pgsql':
$res = pg_query($conn, $stmt);
if ($res === false) {
$error = pg_last_error();
}
break;
default:
$this->updateStatus("runDbScript() error: unknown database type ". $type ." provided.");
}
if ($res === false) {
$this->updateStatus("ERROR ($error) for SQL '$stmt'");
return $res;
}
}
return true;
}
/**
* Create the initial admin user account.
* Side effect: may load portions of StatusNet framework.
* Side effect: outputs program info
*/
function registerInitialUser()
{
define('STATUSNET', true);
define('LACONICA', true); // compatibility
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');
$user->grantRole('administrator');
// Attempt to do a remote subscribe to update@status.net
// Will fail if instance is on a private network.
if ($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.
*
* Prerequisites: validation of input data.
*
* @return boolean success
*/
function doInstall()
{
$this->db = $this->setupDatabase();
if (!$this->db) {
// database connection failed, do not move on to create config file.
return false;
}
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;
}
}
/*
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);
}