RetroZilla/toolkit/mozapps/extensions/service/VersionCheck.php

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2015-10-21 05:03:22 +02:00
<?php
/* -*- Mode: php; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Extension Update Service.
*
* The Initial Developer of the Original Code is Vladimir Vukicevic.
* Portions created by the Initial Developer are Copyright (C) 2004
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Vladimir Vukicevic <vladimir@pobox.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/// config bits:
$db_server = "";
$db_user = "";
$db_pass = "";
$db_name = "";
// error handling
function bail ($errstr) {
die("Error: " . $errstr);
}
// major.minor.release.build[+]
// make sure this is a valid version
function expandversion ($vstr) {
$v = explode('.', $vstr);
if ($vstr == '' || count($v) == 0 || count($v) > 4) {
bail ('Bogus version.');
}
$vlen = count($v);
$ret = array();
$hasplus = 0;
for ($i = 0; $i < 4; $i++) {
if ($i > $vlen-1) {
// this version chunk was not specified; give 0
$ret[] = 0;
} else {
$s = $v[$i];
if ($i == 3) {
// need to check for +
$slen = strlen($s);
if ($s{$slen-1} == '+') {
$s = substr($s, 0, $slen-1);
$hasplus = 1;
}
}
$ret[] = intval($s);
}
}
$ret[] = $hasplus;
return $ret;
}
function vercmp ($a, $b) {
if ($a == $b)
return 0;
$va = expandversion($a);
$vb = expandversion($b);
for ($i = 0; $i < 5; $i++)
if ($va[$i] != $vb[$i])
return ($vb[$i] - $va[$i]);
return 0;
}
//
// These are passed in the GET string
//
if (!array_key_exists('reqVersion', $_GET))
bail ("Invalid request.");
$reqVersion = $_GET['reqVersion'];
if ($reqVersion == 1) {
if (!array_key_exists('id', $_GET) ||
!array_key_exists('version', $_GET) ||
!array_key_exists('maxAppVersion', $_GET) ||
!array_key_exists('appID', $_GET) ||
!array_key_exists('appVersion', $_GET))
bail ("Invalid request.");
$reqItemGuid = $_GET['id'];
$reqItemVersion = $_GET['version'];
$reqItemMaxAppVersion = $_GET['maxAppVersion'];
$reqTargetAppGuid = $_GET['appID'];
$reqTargetAppVersion = $_GET['appVersion'];
} else {
// bail
bail ("Bad request version received");
}
// check args
if (empty($reqItemGuid) || empty($reqItemVersion) || empty($reqTargetAppGuid)) {
bail ("Invalid request.");
}
mysql_connect($db_server, $db_user, $db_pass)
|| bail ("Failed to connect to database.");
mysql_select_db ($db_name)
|| bail ("Failed to select database.");
// We need to fetch two things for the database:
// 1) The current extension version's info, for a possibly updated max version
// 2) The latest version available, if different from the above.
//
// We know:
// - $reqItemGuid
// - $reqItemVersion
// - $reqTargetAppGuid
// - $reqTargetAppVersion
//
// We need to get:
// - extension GUID
// - extension version
// - extension xpi link
// - app ID
// - app min version
// - app max version
$query = "SELECT t_main.guid AS extguid,
t_version.version AS extversion,
t_version.uri AS exturi,
t_version.minappver AS appminver,
t_version.maxappver AS appmaxver,
t_applications.guid AS appguid
FROM t_main, t_version, t_applications
WHERE t_main.guid = '" . mysql_real_escape_string($reqItemGuid) . "' AND
t_main.id = t_version.id AND
t_version.appid = t_applications.appid AND
t_applications.guid = '" . mysql_real_escape_string($reqTargetAppGuid) . "'";
$result = mysql_query ($query);
if (!$result) {
bail ('Query error: ' . mysql_error());
}
// info for this version
$thisVersionData = '';
// info for highest version
$highestVersion = '';
$highestVersionData = '';
while ($line = mysql_fetch_array($result, MYSQL_ASSOC)) {
// is this row for the current version?
if ($line['extversion'] == $reqItemVersion) {
// if so
$thisVersionData = $line;
} else if (vercmp ($reqItemVersion, $line['extversion']) > 0) {
// did we already see an update with a higher version than this?
if ($highestVersion != '' && vercmp ($highestVersion, $line['extversion']) < 0)
continue;
// does this update support my current app version?
if (vercmp($line['appmaxver'], $reqTargetAppVersion) > 0 ||
vercmp($reqTargetAppVersion, $line['appminver']) > 0)
continue;
$highestVersion = $line['extversion'];
$highestVersionData = $line;
}
}
mysql_free_result ($result);
//
// Now to spit out the RDF. We hand-generate because the data is pretty simple.
//
print "<?xml version=\"1.0\"?>\n";
print "<RDF:RDF xmlns:RDF=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\" xmlns:em=\"http://www.mozilla.org/2004/em-rdf#\">\n\n";
print "<RDF:Description about=\"urn:mozilla:extension:{$reqItemGuid}\">\n";
// output list of updates (just highest and this)
print " <em:updates><RDF:Seq>\n";
if (!empty($thisVersionData))
print " <RDF:li resource=\"urn:mozilla:extension:{$reqItemGuid}:{$thisVersionData['extversion']}\"/>\n";
if (!empty($highestVersionData))
print " <RDF:li resource=\"urn:mozilla:extension:{$reqItemGuid}:{$highestVersionData['extversion']}\"/>\n";
print " </RDF:Seq></em:updates>\n";
// output compat bits for firefox 0.9
if (!empty($highestVersionData)) {
print " <em:version>{$highestVersionData['extversion']}</em:version>\n";
print " <em:updateLink>{$highestVersionData['exturi']}</em:updateLink>\n";
}
print "</RDF:Description>\n\n";
function print_update ($data) {
print "<RDF:Description about=\"urn:mozilla:extension:{$reqItemGuid}:{$data['extversion']}\">\n";
print " <em:version>{$data['extversion']}</em:version>\n";
print " <em:targetApplication>\n";
print " <RDF:Description>\n";
print " <em:id>{$data['appguid']}</em:id>\n";
print " <em:minVersion>{$data['appminver']}</em:minVersion>\n";
print " <em:maxVersion>{$data['appmaxver']}</em:maxVersion>\n";
print " <em:updateLink>{$data['exturi']}</em:updateLink>\n";
print " </RDF:Description>\n";
print " </em:targetApplication>\n";
print "</RDF:Description>\n";
}
if (!empty($thisVersionData))
print_update ($thisVersionData);
if (!empty($highestVersionData))
print_update ($highestVersionData);
print "</RDF:RDF>\n";
?>