aboutsummaryrefslogtreecommitdiffstats
path: root/lib/Downloads.php
blob: 61169f7bbfef05c0fe013161b7b4a9e7a9d4f733 (plain)
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
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
<?php
/**
 * Class regrouping basic methods for download page.
 *
 * @copyright 2009-2011  Romain d'Alverny <rda>
 * @license GPL-3+
 *
*/
class Downloads
{
    /**
    */
    function __construct()
    {
    }
    /**
     * @param string $ua
     *
     * @return array
     *
     * @todo unit tests or use something else
     * Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10_4_11; fr) AppleWebKit/533.18.1 (KHTML, like Gecko) Version/4.1.2 Safari/533.18.5
     * Mozilla/5.0 (X11; Linux i686; rv:2.0) Gecko/20110330 Firefox/4.0
     * other old ones
     *
     * @todo refactor this
    */
    public static function get_platform($ua = null)
    {
        if ($ua == '')
            return array(
                'arch'    => 'i586',
                'system'  => 'unknown',
                'locale'  => 'en',
                'browser' => null
            );

        $locale = null;

        if (preg_match_all('/([.^\(^\)]*) \((.*)\) (.*)/', $ua, $r))
        {
            $r = $r[2][0];
            $r = explode(';', $r);
            if (isset($r[3])) {
                $r = explode(')', trim($r[3]));
                if (strlen($r[0]) > 5)
                    $r = substr($r[0], 0, 5);
                else
                    $r = $r[0];
            }
            else
                $r = null;

            $locale = $r;
        }

        $arch = 'i586';
        if (strpos($ua, 'x86_64') !== false)
            $arch = 'x86_64';

        $sys = null;
        if (strpos($ua, 'Windows') !== false)
            $sys = 'win';
        elseif (strpos($ua, 'Macintosh') !== false
            || strpos($ua, 'Mac OS X') !== false)
            $sys = 'mac';
        elseif (strpos($ua, 'Linux') !== false)
            $sys = 'linux';

        $browser = null;
        if (strpos($ua, 'Firefox') !== false)
            $browser = 'firefox';
        elseif (strpos($ua, 'MSIE') !== false)
            $browser = 'msie';
        elseif (strpos($ua, 'Safari') !== false)
            $browser = 'safari';
        elseif (strpos($ua, 'Opera') !== false)
            $browser = 'opera';

        return array(
            'arch'    => $arch,
            'system'  => $sys,
            'locale'  => $locale, // FIXME (rda) use Accept-Language instead
            'browser' => $browser
        );
    }

    /**
     * Sort 2D array by multiple associative or numeric keys.
     * $sorted_array = self::sort_2d_array_by_multiple_keys($unsorted_array, 'first key', 'second', ...);
     *
     * based on SortArray http://php.net/manual/en/function.usort.php#42535
     *
     * @param array $unsorted_array
     *
     * @param string first key to order by
     *
     * @param string second key to order by
     *
     * @param string add as many keys to order by as needed
     *
     * @return array $sorted_array
    */
    public static function sort_2d_array_by_multiple_keys()
    {
        $arguments = func_get_args();
        $array = $arguments[0];
        $anonymous_function = '';
        $num_of_arguments = count($arguments);
        for ($cur_argument = 1; $cur_argument < $num_of_arguments; $cur_argument++) {
            $anonymous_function .= "if (\$first['$arguments[$cur_argument]'] != \$second['$arguments[$cur_argument]']) {";
            $anonymous_function .= "    \$compare_result = strcoll(\$first['$arguments[$cur_argument]'], \$second['$arguments[$cur_argument]']);";
            $anonymous_function .= "    if (0 == \$compare_result) { return 0; };";
            $anonymous_function .= "    return ((0 > \$compare_result) ? -1 : 1);";
            $anonymous_function .= "}";
        }
        $anonymous_function .= "return 0;";
        $compare_function = create_function("\$first, \$second", $anonymous_function);
        usort($array, $compare_function);
        return $array;
    }

    /**
     * Get mirrors list from mirrors.mageia.org,
     * store/cache it in a different key/value format
     * (keys are: "$country" and "_C:$continent"),
     * and return it.
     *
     * Note that the mirrors list doesn't change with versions, for now;
     * it's a full or nothing list.
     *
     * @param boolean $prod
     * @param boolean $documentation
     * @param boolean $mirrorlist
     *
     * @return array
    */
    public static function get_all_mirrors($prod = true, $documentation = false, $mirrorlist = false)
    {
        if ($documentation) {
            $cache_file = realpath(__DIR__ . '/cached.list_doc.php');
        } else if ($mirrorlist) {
            $cache_file = realpath(__DIR__ . '/cached.list_mirrorlist.php');
        } else {
            $cache_file = realpath(__DIR__ . '/cached.list.php');
        }

        if ($prod) {
            require $cache_file;

        } else {
            $data    = file('http://mirrors.mageia.org/api/mageia.6.i586.list');
            $mirrors = array();
            $num_up  = 0;
            $num_dn  = 0;
            foreach ($data as $line) {
                $line = explode(',', trim($line));
                $m    = array();
                foreach ($line as $val) {
                    $val        = explode('=', trim($val));
                    if (!empty($val[1])) {
                        $m[$val[0]] = $val[1];
                    }
                }
                $pu = parse_url($m['url']);
                if (in_array($pu['scheme'], array('http', 'https', 'ftp'))) {
                    $item = array(
                        'zone'      => isset($m['zone']) ? $m['zone'] : '?',
                        'country'   => isset($m['country']) ? $m['country'] : '?',
                        'city'      => isset($m['city']) ? utf8_encode($m['city']) : '-',
                        // BEWARE of the path substitution here. Must match.
                        'url'       => str_replace('/distrib/6/i586', '', $m['url'])
                    );

                    if ($documentation) {
                        $test_file = $item['url'].'/doc/mga6/date.txt';
                    } else if ($mirrorlist) {
                        $test_file = $item['url'].'/distrib/6.1/x86_64/media/core/updates/repodata/repomd.xml';
                    } else {
                        $test_file = $item['url'].'/iso/6.1/torrents/Mageia-6.1-LiveDVD-GNOME-x86_64-DVD.torrent';
                    }
                    if (false === @file_get_contents($test_file)) {
                        $num_dn++;
                        echo "Down ($num_dn) $test_file \n";
                    } else {
                        $num_up++;
                        echo "Up ($num_up) $test_file \n";
//                         $mirrors[$m['country']][]           = $item;
                        $mirrors['_C:' . $m['continent']][] = $item;
                    }
                }
            }
            ksort($mirrors);
            foreach ($mirrors as &$continent) {
                $continent = self::sort_2d_array_by_multiple_keys($continent, 'zone', 'country', 'city', 'url');
            }
            unset($continent);

            echo "\nThere are $num_up servers with the file and $num_dn with some kind of issue.\n";
            file_put_contents($cache_file,
                sprintf('<?php $mirrors = %s; ?>' . PHP_EOL, var_export($mirrors, true)));
        }
        return $mirrors;
    }

    /**
     * Get mirrors from stored dictionary and find best matching mirror:
     * - if it exists in the country otherwise
     * - on continent if it exists otherwise
     * - random mirror
     * It can also prepare a list of mirrors for mirrorlist page
     *
     * @param string $country
     * @param string $continent
     * @param boolean $prod
     * @param boolean $documentation
     * @param boolean $mirrorlist
     *
     * @return array
    */
    function get_mirror($country, $continent = null, $prod = true, $documentation = false, $mirrorlist = false)
    {
        $mirs      = self::get_all_mirrors($prod, $documentation, $mirrorlist);
        $continent = '_C:' . $continent;

        $mirrors       = array();
        $fr_mirr_asist = array();
        $list_of_mirrs = array(
            'country'                 => array(),
            'continent_minus_country' => array(),
            'other_continents'        => array()
        );
        foreach ($mirs as $curr_continent => $continent_mirrors) {
            if ($continent != $curr_continent)
            {
                if ($mirrorlist)
                {
                    foreach ($continent_mirrors as $mirror) {
                        $list_of_mirrs['other_continents'][] = $mirror['url'];
                    }
                }
                continue;
            }
            foreach ($continent_mirrors as $mirror) {
                if (strpos($mirror['url'], 'distrib-coffee.ipsl.jussieu.fr') !== false)
                {
                    // exclude source server to drop it's DL load
                    continue;
                }
                // keep assisting the french mirrors with german ones
                if ($mirror['country'] == 'DE')
                {
                    $fr_mirr_asist[] = $mirror;
                }
                // only add german mirrors when french are on turn
                // sorting of mirror db cache must be kept to work properly (DE before FR)
                if ($country == 'FR' && $mirror['country'] == 'FR' && count($fr_mirr_asist) > 0)
                {
                    $mirrors[$continent] = $fr_mirr_asist;
                    $fr_mirr_asist = array();
                }
                if ($mirrorlist)
                {
                    if ($mirror['country'] == $country)
                    {
                        $list_of_mirrs['country'][] = $mirror['url'];
                    }
                    else
                    {
                        $list_of_mirrs['continent_minus_country'][] = $mirror['url'];
                    }
                }
                else
                {
                    if ($mirror['country'] == $country)
                    {
                        $mirrors[$continent][] = $mirror;
                    }
                }
            }
            if (count($mirrors) == 0)
            {
                // add all continent mirrors if country doesn't have any
                $mirrors[$continent] = $continent_mirrors;
            }
        }
        if (count($mirrors) > 0)
        {
            $mirs = $mirrors;
        }

        shuffle($mirs);
        $mirr_continent = $mirs[0];
        $mirs = array_shift($mirs);
        shuffle($mirs);
        $one_mirror = array_shift($mirs);
        $one_mirror['continent'] = $mirr_continent;

        if ($mirrorlist)
        {
            shuffle($list_of_mirrs['country']);
            shuffle($list_of_mirrs['continent_minus_country']);
            shuffle($list_of_mirrs['other_continents']);
            $resulting_mirrs = array_merge(
                $list_of_mirrs['country'],
                $list_of_mirrs['continent_minus_country'],
                $list_of_mirrs['other_continents']
            );
            $one_mirror['mirrors_list'] = array_slice($resulting_mirrs, 0, 10);
        }

        return $one_mirror;
    }

    function prepare_download($force = false, $country = null, $prod = true, $documentation = false, $mirrorlist = false)
    {
        return $this->get_one_mirror($force, $country, $prod, $documentation, $mirrorlist);
    }

    /**
     * Setup session data about current visitor for downloads.
     *
     * @param boolean $force
     * @param string $country
     * @param boolean $prod
     * @param boolean $documentation
     * @param boolean $mirrorlist
     *
     * @return array
     *
     * TODO extract as much as possible $_SESSION(read) and $_SERVER and $_GET
    */
    function get_one_mirror($force = false, $country = null, $prod = true, $documentation = false, $mirrorlist = false)
    {
        $fuzzy_mirror = false;

        if (!is_null($country))
            $force = true;

        // FIXME break this into smaller parts and extract globals so we can test st
        if (!$force && isset($_SESSION['dl-data']))
        {
            //error_log(sprintf('Got session data: %s', print_r($_SESSION['dl-data'], true)));
            $system  = $_SESSION['dl-data']['system'];
            if (isset($_GET['mirror']))
            {
                $mirror                        = array('url' => $_GET['mirror']);
                $mirror['purl']                = parse_url($mirror['url']);
                $_SESSION['dl-data']['mirror'] = $mirror;
                $country                       = '';
            }
            else
            {
                $country = $_SESSION['dl-data']['country'];
                $mirror  = $_SESSION['dl-data']['mirror'];
            }
        }
        else
        {
            //error_log('getting platform');
            $system = self::get_platform($_SERVER['HTTP_USER_AGENT']);
            if (isset($_GET['mirror']))
            {
                $mirror         = array('url' => $_GET['mirror']);
                $mirror['purl'] = parse_url($mirror['url']);
                $country        = null;
            }
            else
            {
                //error_log('no mirror set yet');
                if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])
                    && $str = $_SERVER['HTTP_X_FORWARDED_FOR'])
                {
                    $arr = explode(', ', $str);
                    $ip  = $arr[0];
                }
                else
                    $ip = $_SERVER['REMOTE_ADDR'];

                $_SESSION['ip'] = $ip;
                if (is_null($country))
                {
                    require_once realpath(__DIR__ . '/mga_geoip.php');
                    $country      = MGA_Geoip::mga_geoip_country_by_ip($ip, false);
                    $continent    = MGA_Geoip::mga_geoip_continent_by_country($country);
                    $fuzzy_mirror = true;
                    $_SESSION['country']   = $country;
                    $_SESSION['continent'] = $continent;
                }
                if (!isset($continent))
                {
                    $continent = null;
                }

                $mirror         = $this->get_mirror($country, $continent, $prod, $documentation, $mirrorlist);
                $mirror['purl'] = parse_url($mirror['url']);

                // reassign country, as get_one_mirror() may have decided
                // to return a mirror from another country than the one
                // requested initially - @see get_one_mirror()
                $country   = $mirror['zone'];
                $continent = $mirror['continent'];

                if (is_null($mirror)) {
                    // @todo?
                }
            }

            // write to session
            $_SESSION['dl-data'] = array(
                'system'    => $system,
                'country'   => $country,
                'continent' => $continent,
                'mirror'    => $mirror
            );
        }
        if (!isset($mirror['mirrors_list']))
        {
            $mirror['mirrors_list'] = array();
        }
        return array(
            'arch'          => $system['arch'],
            'mirror_host'   => $mirror['purl']['host'],
            'mirror_scheme' => $mirror['purl']['scheme'],
            'mirror_url'    => $mirror['url'],
            'country'       => $country,
            'continent'     => $continent,
            'city'          => $mirror['city'],
            'fuzzy_mirror'  => $fuzzy_mirror,
            'mirrors_list'  => $mirror['mirrors_list'],
        );
    }
}