phabricator/webroot/index.php

<?php

/*
 * Copyright 2011 Facebook, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

$__start__ = microtime(true);

error_reporting(E_ALL | E_STRICT);

phabricator_detect_insane_memory_limit();

ini_set('memory_limit', -1);

$env = getenv('PHABRICATOR_ENV'); // Apache
if (!$env) {
  if (isset($_ENV['PHABRICATOR_ENV'])) {
    $env = $_ENV['PHABRICATOR_ENV'];
  }
}

if (!$env) {
  phabricator_fatal_config_error(
    "The 'PHABRICATOR_ENV' environmental variable is not defined. Modify ".
    "your httpd.conf to include 'SetEnv PHABRICATOR_ENV <env>', where '<env>' ".
    "is one of 'development', 'production', or a custom environment.");
}

if (!function_exists('mysql_connect')) {
  phabricator_fatal_config_error(
    "The PHP MySQL extension is not installed. This extension is required.");
}

if (!isset($_REQUEST['__path__'])) {
  phabricator_fatal_config_error(
    "__path__ is not set. Your rewrite rules are not configured correctly.");
}

if (get_magic_quotes_gpc()) {
  phabricator_fatal_config_error(
    "Your server is configured with PHP 'magic_quotes_gpc' enabled. This ".
    "feature is 'highly discouraged' by PHP's developers and you must ".
    "disable it to run Phabricator. Consult the PHP manual for instructions.");
}

register_shutdown_function('phabricator_shutdown');

require_once dirname(dirname(__FILE__)).'/conf/__init_conf__.php';

try {
  setup_aphront_basics();

  $conf = phabricator_read_config_file($env);
  $conf['phabricator.env'] = $env;

  phutil_require_module('phabricator', 'infrastructure/env');
  PhabricatorEnv::setEnvConfig($conf);

  phutil_require_module('phabricator', 'aphront/console/plugin/xhprof/api');
  DarkConsoleXHProfPluginAPI::hookProfiler();

  phutil_require_module('phabricator', 'aphront/console/plugin/errorlog/api');

  PhutilErrorHandler::initialize();

} catch (Exception $ex) {
  phabricator_fatal("[Initialization Exception] ".$ex->getMessage());
}

$tz = PhabricatorEnv::getEnvConfig('phabricator.timezone');
if ($tz) {
  date_default_timezone_set($tz);
}
phutil_require_module('phabricator', 'aphront/console/plugin/errorlog/api');
phutil_require_module('phutil', 'error');

PhutilErrorHandler::setErrorListener(
  array('DarkConsoleErrorLogPluginAPI', 'handleErrors'));

foreach (PhabricatorEnv::getEnvConfig('load-libraries') as $library) {
  phutil_load_library($library);
}

if (PhabricatorEnv::getEnvConfig('phabricator.setup')) {
  PhabricatorSetup::runSetup();
  return;
}


$host = $_SERVER['HTTP_HOST'];
$path = $_REQUEST['__path__'];

switch ($host) {
  default:
    $config_key = 'aphront.default-application-configuration-class';
    $config_class = PhabricatorEnv::getEnvConfig($config_key);
    PhutilSymbolLoader::loadClass($config_class);
    $application = newv($config_class, array());
    break;
}


$application->setHost($host);
$application->setPath($path);
$application->willBuildRequest();
$request = $application->buildRequest();

$write_guard = new AphrontWriteGuard($request);

$application->setRequest($request);
list($controller, $uri_data) = $application->buildController();
try {
  $response = $controller->willBeginExecution();
  if (!$response) {
    $controller->willProcessRequest($uri_data);
    $response = $controller->processRequest();
  }
} catch (AphrontRedirectException $ex) {
  $response = id(new AphrontRedirectResponse())
    ->setURI($ex->getURI());
} catch (Exception $ex) {
  $response = $application->handleException($ex);
}

try {
  $response = $application->willSendResponse($response);
  $response->setRequest($request);
  $response_string = $response->buildResponseString();
} catch (Exception $ex) {
  $write_guard->dispose();
  phabricator_fatal('[Rendering Exception] '.$ex->getMessage());
}

$write_guard->dispose();


$code = $response->getHTTPResponseCode();
if ($code != 200) {
  header("HTTP/1.0 {$code}");
}

$headers = $response->getCacheHeaders();
$headers = array_merge($headers, $response->getHeaders());
foreach ($headers as $header) {
  list($header, $value) = $header;
  header("{$header}: {$value}");
}


// TODO: This shouldn't be possible in a production-configured environment.
if (isset($_REQUEST['__profile__']) &&
    ($_REQUEST['__profile__'] == 'all')) {
  $profile = DarkConsoleXHProfPluginAPI::stopProfiler();
  $profile =
    '<div style="text-align: center; background: #ff00ff; padding: 1em;
                 font-size: 24px; font-weight: bold;">'.
      '<a href="/xhprof/profile/'.$profile.'/">'.
        '&gt;&gt;&gt; View Profile &lt;&lt;&lt;'.
      '</a>'.
    '</div>';
  if (strpos($response_string, '<body>') !== false) {
    $response_string = str_replace(
      '<body>',
      '<body>'.$profile,
      $response_string);
  } else {
    echo $profile;
  }
}

echo $response_string;

/**
 * @group aphront
 */
function setup_aphront_basics() {
  $aphront_root   = dirname(dirname(__FILE__));
  $libraries_root = dirname($aphront_root);

  $root = null;
  if (!empty($_SERVER['PHUTIL_LIBRARY_ROOT'])) {
    $root = $_SERVER['PHUTIL_LIBRARY_ROOT'];
  }

  ini_set('include_path', $libraries_root.':'.ini_get('include_path'));
  @include_once $root.'libphutil/src/__phutil_library_init__.php';
  if (!@constant('__LIBPHUTIL__')) {
    echo "ERROR: Unable to load libphutil. Update your PHP 'include_path' to ".
         "include the parent directory of libphutil/.\n";
    exit(1);
  }

  // Load Phabricator itself using the absolute path, so we never end up doing
  // anything surprising (loading index.php and libraries from different
  // directories).
  phutil_load_library($aphront_root.'/src');
  phutil_load_library('arcanist/src');

}

function phabricator_fatal_config_error($msg) {
  phabricator_fatal("CONFIG ERROR: ".$msg."\n");
  die();
}

function phabricator_detect_insane_memory_limit() {
  $memory_limit = ini_get('memory_limit');
  $char_limit   = 12;
  if (strlen($memory_limit) <= $char_limit) {
    return;
  }

  // colmdoyle ran into an issue on an Ubuntu box with Suhosin where his
  // 'memory_limit' was set to:
  //
  //   3232323232323232323232323232323232323232323232323232323232323232M
  //
  // Not a typo. A wizard did it.
  //
  // Anyway, with this 'memory_limit', the machine would immediately fatal
  // when executing the ini_set() later. I wasn't able to reproduce this on my
  // EC2 Ubuntu + Suhosin box, but verified that it caused the problem on his
  // machine and that setting it to a more sensible value fixed it. Since I
  // have no idea how to actually trigger the issue, we look for a coarse
  // approximation of it (a memory_limit setting more than 12 characters in
  // length).

  phabricator_fatal_config_error(
    "Your PHP 'memory_limit' is set to something ridiculous ".
    "(\"{$memory_limit}\"). Set it to a more reasonable value (it must be no ".
    "more than {$char_limit} characters long).");
}

function phabricator_shutdown() {
  $event = error_get_last();

  if (!$event) {
    return;
  }

  if ($event['type'] != E_ERROR && $event['type'] != E_PARSE) {
    return;
  }

  $msg = ">>> UNRECOVERABLE FATAL ERROR <<<\n\n";
  if ($event) {
    // Even though we should be emitting this as text-plain, escape things just
    // to be sure since we can't really be sure what the program state is when
    // we get here.
    $msg .= phutil_escape_html($event['message'])."\n\n";
    $msg .= phutil_escape_html($event['file'].':'.$event['line']);
  }

  // flip dem tables
  $msg .= "\n\n\n";
  $msg .= "\xe2\x94\xbb\xe2\x94\x81\xe2\x94\xbb\x20\xef\xb8\xb5\x20\xc2\xaf".
          "\x5c\x5f\x28\xe3\x83\x84\x29\x5f\x2f\xc2\xaf\x20\xef\xb8\xb5\x20".
          "\xe2\x94\xbb\xe2\x94\x81\xe2\x94\xbb";

  phabricator_fatal($msg);
}

function phabricator_fatal($msg) {
  header(
    'Content-Type: text/plain; charset=utf-8',
    $replace = true,
    $http_error = 500);

  error_log($msg);
  echo $msg;

  exit(1);
}