1: <?php
2: 3: 4: 5: 6: 7: 8: 9: 10: 11:
12:
13: function create_external ( $path,$is_calendar,$is_addressbook )
14: {
15: global $request;
16: if ( ! function_exists ( "curl_init" ) ) {
17: dbg_error_log("external", "external resource cannot be fetched without curl, please install curl");
18: $request->DoResponse( 503, translate('PHP5 curl support is required for external binds') );
19: return ;
20: }
21: $resourcetypes = '<DAV::collection/>';
22: if ($is_calendar) $resourcetypes .= '<urn:ietf:params:xml:ns:caldav:calendar/>';
23: $qry = new AwlQuery();
24: if ( ! $qry->QDo( 'INSERT INTO collection ( user_no, parent_container, dav_name, dav_etag, dav_displayname,
25: is_calendar, is_addressbook, resourcetypes, created )
26: VALUES( :user_no, :parent_container, :dav_name, :dav_etag, :dav_displayname,
27: :is_calendar, :is_addressbook, :resourcetypes, current_timestamp )',
28: array(
29: ':user_no' => $request->user_no,
30: ':parent_container' => '/.external/',
31: ':dav_name' => $path,
32: ':dav_etag' => md5($request->user_no. $path),
33: ':dav_displayname' => $path,
34: ':is_calendar' => ($is_calendar ? 't' : 'f'),
35: ':is_addressbook' => ($is_addressbook ? 't' : 'f'),
36: ':resourcetypes' => $resourcetypes
37: ) ) ) {
38: $request->DoResponse( 500, translate('Error writing calendar details to database.') );
39: }
40: }
41:
42: function fetch_external ( $bind_id, $min_age = '1 hour' )
43: {
44: if ( ! function_exists ( "curl_init" ) ) {
45: dbg_error_log("external", "external resource cannot be fetched without curl, please install curl");
46: $request->DoResponse( 503, translate('PHP5 curl support is required for external binds') );
47: return ;
48: }
49: $sql = 'SELECT collection.*, collection.dav_name AS path, dav_binding.external_url AS external_url FROM dav_binding LEFT JOIN collection ON (collection.collection_id=bound_source_id) WHERE bind_id = :bind_id';
50: $params = array( ':bind_id' => $bind_id );
51: if ( strlen ( $min_age ) > 2 ) {
52: $sql .= ' AND collection.modified + interval :interval < NOW()';
53: $params[':interval'] = $min_age;
54: }
55: $sql .= ' ORDER BY modified DESC LIMIT 1';
56: $qry = new AwlQuery( $sql, $params );
57: if ( $qry->Exec('DAVResource') && $qry->rows() > 0 && $row = $qry->Fetch() ) {
58: $curl = curl_init ( $row->external_url );
59: curl_setopt ( $curl, CURLOPT_RETURNTRANSFER, true );
60: if ( $row->modified ) {
61: $local_ts = new DateTime($row->modified);
62: curl_setopt ( $curl, CURLOPT_HEADER, true );
63: curl_setopt ( $curl, CURLOPT_FILETIME, true );
64: curl_setopt ( $curl, CURLOPT_NOBODY, true );
65: curl_setopt ( $curl, CURLOPT_TIMEVALUE, $local_ts->format("U") );
66: curl_setopt ( $curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE );
67: dbg_error_log("external", "checking external resource for remote changes " . $row->external_url );
68: $ics = curl_exec ( $curl );
69: $info = curl_getinfo ( $curl );
70: if ( $info['http_code'] === 304 || (isset($info['filetime']) && $info['filetime'] != -1 && new DateTime("@" . $info['filetime']) <= $local_ts )) {
71: dbg_error_log("external", "external resource unchanged " . $info['filetime'] . ' < ' . $local_ts->getTimestamp() . ' (' . $info['http_code'] . ')');
72: curl_close ( $curl );
73:
74: $qry = new AwlQuery( 'UPDATE collection SET modified=NOW() WHERE collection_id = :cid', array ( ':cid' => $row->collection_id ) );
75: $qry->Exec('DAVResource');
76: return true;
77: }
78: dbg_error_log("external", "external resource changed, re importing" . $info['filetime'] );
79: }
80: else {
81: dbg_error_log("external", "fetching external resource for the first time " . $row->external_url );
82: }
83: curl_setopt ( $curl, CURLOPT_NOBODY, false );
84: curl_setopt ( $curl, CURLOPT_HEADER, false );
85: $ics = curl_exec ( $curl );
86: curl_close ( $curl );
87: if ( is_string ( $ics ) && strlen ( $ics ) > 20 ) {
88:
89: $qry = new AwlQuery( 'UPDATE collection SET modified=NOW(), dav_etag=:etag WHERE collection_id = :cid',
90: array ( ':cid' => $row->collection_id, ':etag' => md5($ics) ) );
91: $qry->Exec('DAVResource');
92: require_once ( 'caldav-PUT-functions.php');
93: import_collection ( $ics , $row->user_no, $row->path, 'External Fetch' , false ) ;
94: return true;
95: }
96: }
97: else {
98: dbg_error_log("external", "external resource up to date or not found id(%s)", $bind_id );
99: }
100: return false;
101: }
102:
103: function update_external ( $request )
104: {
105: global $c;
106: if ( $c->external_refresh < 1 )
107: return ;
108: if ( ! function_exists ( "curl_init" ) ) {
109: dbg_error_log("external", "external resource cannot be fetched without curl, please install curl");
110: return ;
111: }
112: $sql = 'SELECT bind_id, external_url as url from dav_binding LEFT JOIN collection ON (collection.collection_id=bound_source_id) WHERE dav_binding.dav_name = :dav_name AND collection.modified + interval :interval < NOW()';
113: $qry = new AwlQuery( $sql, array ( ':dav_name' => $request->dav_name(), ':interval' => $c->external_refresh . ' minutes' ) );
114: dbg_error_log("external", "checking if external resource needs update");
115: if ( $qry->Exec('DAVResource') && $qry->rows() > 0 && $row = $qry->Fetch() ) {
116: if ( $row->bind_id != 0 ) {
117: dbg_error_log("external", "external resource needs updating, this might take a minute : %s", $row->url );
118: fetch_external ( $row->bind_id, $c->external_refresh . ' minutes' );
119: }
120: }
121: }
122: