bootstrap.inc 5.24 KB
Newer Older
Dries's avatar
 
Dries committed
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
<?php

function conf_init() {

  /*
  ** Try finding a matching configuration file by stripping the website's
  ** URI from left to right.  If no configuration file is found, return a
  ** default value 'conf'.
  */

  $uri = $_SERVER["PHP_SELF"];

  $file = strtolower(strtr($_SERVER["HTTP_HOST"] . substr($uri, 0, strrpos($uri, "/")), "/:", ".."));

  while (strlen($file) > 4) {
    if (file_exists("includes/$file.php")) {
      return $file;
    }
    else {
      $file = substr($file, strpos($file, ".") + 1);
    }
  }

  return "conf";
}

function variable_init($conf = array()) {
  $result = db_query("SELECT * FROM {variable} ");
  while ($variable = db_fetch_object($result)) {
    if (!isset($conf[$variable->name])) {
      $conf[$variable->name] = unserialize($variable->value);
    }
  }

  return $conf;
}

function variable_get($name, $default) {
  global $conf;

  return isset($conf[$name]) ? $conf[$name] : $default;
}

function variable_set($name, $value) {
  global $conf;

  db_query("DELETE FROM {variable} WHERE name = '%s'", $name);
  db_query("INSERT INTO {variable} (name, value) VALUES ('%s', '%s')", $name, serialize($value));

  $conf[$name] = $value;
}

function variable_del($name) {
  global $conf;

  db_query("DELETE FROM {variable} WHERE name = '%s'", $name);

  unset($conf[$name]);
}

function cache_get($key) {
  $cache = db_fetch_object(db_query("SELECT data, created FROM {cache} WHERE cid = '%s'", $key));
  return $cache->data ? $cache : 0;
}

function cache_set($cid, $data, $expire = 0) {
  db_query("UPDATE {cache} SET data = '%s', created = %d, expire = %d WHERE cid = '%s'", $data, time(), $expire, $cid);
  if (!db_affected_rows()) {
    db_query("INSERT INTO {cache} (cid, data, created, expire) VALUES('%s', '%s', %d, %d)", $cid, $data, time(), $expire);
  }
}

function cache_clear_all($cid = NULL) {
  if (empty($cid)) {
    db_query("DELETE FROM {cache} WHERE expire <> 0");
  }
  else {
    db_query("DELETE FROM {cache} WHERE cid = '%s'", $cid);
  }
}

function page_set_cache() {
  global $user;

  if (!$user->uid && $_SERVER["REQUEST_METHOD"] == "GET") {
    if ($data = ob_get_contents()) {
      cache_set(request_uri(), $data, 1);
    }
  }
}

function page_get_cache() {
  global $user;

  $cache = NULL;

  if (!$user->uid && $_SERVER["REQUEST_METHOD"] == "GET") {
    $cache = cache_get(request_uri());

    if (empty($cache)) {
      ob_start();
    }
  }

  return $cache;
}

function drupal_page_header() {

  if (variable_get("dev_timer", 0)) {
    timer_start();
  }

  if (variable_get("cache", 0)) {
    if ($cache = page_get_cache()) {

      // Set default values:
      $date = gmdate("D, d M Y H:i:s", $cache->created) ." GMT";
      $etag = '"'. md5($date) .'"';

      // Check http headers:
      $modified_since = isset($_SERVER["HTTP_IF_MODIFIED_SINCE"]) ? $_SERVER["HTTP_IF_MODIFIED_SINCE"] == $date : NULL;
      $none_match = isset($_SERVER["HTTP_IF_NONE_MATCH"]) ? $_SERVER["HTTP_IF_NONE_MATCH"] == $etag : NULL;

      // The type checking here is very important, be careful when changing entries.
      if (($modified_since !== NULL || $none_match !== NULL) && $modified_since !== false && $none_match !== false) {
        header("HTTP/1.0 304 Not Modified");
        exit();
      }

      // Send appropriate response:
      header("Last-Modified: $date");
      header("ETag: $etag");
      print $cache->data;

      /*
      ** call all init() and exit() hooks without including all modules
      ** only use those hooks for critical operations
      */
      foreach (module_list(0, 1) as $module) {
        if (is_array($module) && $module['bootstrap']) {
          include_once $module['filename'];
          foreach (bootstrap_hooks() as $hook) {
            module_invoke($module['name'], $hook);
          }
        }
      }
      exit();
    }
  }
}

// critical hooks called even when serving a cached page
function bootstrap_hooks() {
  return array('init', 'exit');
}

function referer_uri() {

  if (isset($_SERVER["HTTP_REFERER"])) {
    $uri = $_SERVER["HTTP_REFERER"];

    return check_url($uri);
  }
}

function arg($index) {

  static $arguments;

  if (empty($arguments)) {
    $arguments = explode("/", $_GET["q"]);
  }

  return $arguments[$index];
}

function check_query($text) {
  return addslashes($text);
}

function check_url($uri) {
  $uri = htmlspecialchars($uri, ENT_QUOTES);

  /*
  ** We replace ( and ) with their entity equivalents to prevent XSS
  ** attacks.
  */

  $uri = strtr($uri, array("(" => "&040;", ")" => "&041;"));

  return $uri;
}

function request_uri() {
  /*
  ** Since request_uri() is only available on Apache, we generate
  ** equivalent using other environment vars.
  */

  if (isset($_SERVER["REQUEST_URI"])) {
    $uri = $_SERVER["REQUEST_URI"];
  }
  else {
    $uri = $_SERVER["PHP_SELF"] ."?". $_SERVER["QUERY_STRING"];
  }

  return check_url($uri);
}
function timer_start() {
  global $timer;
  list($usec, $sec) = explode(" ", microtime());
  $timer = (float)$usec + (float)$sec;
}

unset($conf);
$config = conf_init();

include_once "includes/$config.php";
include_once "includes/database.inc";
include_once "includes/session.inc";
include_once "includes/module.inc";

// initialize configuration variables, using values from conf.php if available:
$conf = variable_init(isset($conf) ? $conf : array());
?>