Documentation TYPO3 par Ameos

tbl_replace_fields.php

00001 <?php
00002 /* $Id: tbl_replace_fields.php,v 2.5 2003/12/11 12:45:44 garvinhicking Exp $ */
00003 // vim: expandtab sw=4 ts=4 sts=4:
00004 
00005 // note: grab_globals has extracted the fields from _FILES
00006 //       or HTTP_POST_FILES
00007 
00008 // Check parameters
00009 
00010 require_once('./libraries/common.lib.php');
00011 
00012 PMA_checkParameters(array('db','encoded_key'));
00013 
00014 
00015 // f i e l d    u p l o a d e d    f r o m    a    f i l e
00016 
00017 // garvin: original if-clause checked, whether input was stored in a possible fields_upload_XX var.
00018 // Now check, if the field is set. If it is empty or a malicious file, do not alter fields contents.
00019 // If an empty or invalid file is specified, the binary data gets deleter. Maybe a nice
00020 // new text-variable is appropriate to document this behaviour.
00021 
00022 // garvin: security cautions! You could trick the form and submit any file the webserver has access to
00023 // for upload to a binary field. Shouldn't be that easy! ;)
00024 
00025 // garvin: default is to advance to the field-value parsing. Will only be set to true when a
00026 // binary file is uploaded, thus bypassing further manipulation of $val.
00027 
00028 $check_stop = false;
00029 
00030 // Check if a multi-edit row was found
00031 ${'me_fields_upload_' . $encoded_key}      = (isset($enc_primary_key) && isset(${'fields_upload_' . $encoded_key}['multi_edit'])      ? ${'fields_upload_' . $encoded_key}['multi_edit'][$enc_primary_key]      : (isset(${'fields_upload_' . $encoded_key})      ? ${'fields_upload_' . $encoded_key}      : null));
00032 ${'me_fields_uploadlocal_' . $encoded_key} = (isset($enc_primary_key) && isset(${'fields_uploadlocal_' . $encoded_key}['multi_edit']) ? ${'fields_uploadlocal_' . $encoded_key}['multi_edit'][$enc_primary_key] : (isset(${'fields_uploadlocal_' . $encoded_key}) ? ${'fields_uploadlocal_' . $encoded_key} : null));
00033 
00034 if (isset(${'me_fields_upload_' . $encoded_key}) && ${'me_fields_upload_' . $encoded_key} != 'none'){
00035     // garvin: This fields content is a blob-file upload.
00036 
00037     if (!empty(${'me_fields_upload_' . $encoded_key})) {
00038         // garvin: The blob-field is not empty. Check what we have there.
00039 
00040         $data_file = ${'me_fields_upload_' . $encoded_key};
00041 
00042         if (is_uploaded_file($data_file)) {
00043             // garvin: A valid uploaded file is found. Look into the file...
00044 
00045             $val = fread(fopen($data_file, 'rb'), filesize($data_file));
00046             // nijel: This is probably the best way how to put binary data
00047             // into MySQL and it also allow not to care about charset
00048             // conversion that would otherwise corrupt the data.
00049 
00050             if (!empty($val)) {
00051                 // garvin: The upload was valid. Check in new blob-field's contents.
00052                 $val = '0x' . bin2hex($val);
00053                 $seen_binary = TRUE;
00054                 $check_stop = TRUE;
00055             }
00056             // garvin: ELSE: an empty file was uploaded. Remove blob-field's contents.
00057             // Blob-fields are preserved, see below. ($protected$)
00058 
00059         } else {
00060             // garvin: Danger, will robinson. File is malicious. Blob-fields are preserved, see below. ($protected$)
00061             // void
00062         }
00063 
00064     } elseif (!empty(${'me_fields_uploadlocal_' . $encoded_key})) {
00065         if (substr($cfg['UploadDir'], -1) != '/') {
00066             $cfg['UploadDir'] .= '/';
00067         }
00068         $file_to_upload = $cfg['UploadDir'] . preg_replace('@\.\.*@', '.', ${'me_fields_uploadlocal_' . $encoded_key});
00069 
00070         // A local file will be uploaded.
00071         $open_basedir = @ini_get('open_basedir');
00072 
00073         // If we are on a server with open_basedir, we must move the file
00074         // before opening it. The doc explains how to create the "./tmp"
00075         // directory
00076 
00077         $unlink = false;
00078         if (!empty($open_basedir)) {
00079 
00080             $tmp_subdir = (PMA_IS_WINDOWS ? '.\\tmp\\' : './tmp/');
00081 
00082             // function is_writeable() is valid on PHP3 and 4
00083             if (!is_writeable($tmp_subdir)) {
00084                 // if we cannot move the file don't change blob fields
00085                 $file_to_upload = '';
00086             } else {
00087                 $new_file_to_upload = $tmp_subdir . basename($file_to_upload);
00088                 move_uploaded_file($file_to_upload, $new_file_to_upload);
00089 
00090                 $file_to_upload = $new_file_to_upload;
00091                 $unlink = true;
00092             }
00093         }
00094 
00095         if ($file_to_upload != '') {
00096 
00097             $val = fread(fopen($file_to_upload, 'rb'), filesize($file_to_upload));
00098             if (!empty($val)) {
00099                 $val = '0x' . bin2hex($val);
00100                 $seen_binary = TRUE;
00101                 $check_stop = TRUE;
00102             }
00103 
00104             if ($unlink == TRUE) {
00105                 unlink($file_to_upload);
00106             }
00107         }
00108 
00109     }
00110     // garvin: else: Post-field contains no data. Blob-fields are preserved, see below. ($protected$)
00111 
00112 }
00113 
00114 if (!$check_stop) {
00115 
00116 // f i e l d    v a l u e    i n    t h e    f o r m
00117 
00118     if (isset($me_fields_type[$encoded_key])) $type = $me_fields_type[$encoded_key];
00119     else $type = '';
00120     
00121     $f = 'field_' . md5($key);
00122     $t_fval = (isset($$f) ? $$f : null);
00123     
00124     if (isset($t_fval['multi_edit']) && isset($t_fval['multi_edit'][$enc_primary_key])) {
00125         $fval = &$t_fval['multi_edit'][$enc_primary_key];
00126     } else {
00127         $fval = &$t_fval;
00128     }
00129     
00130     switch (strtolower($val)) {
00131         // let users type NULL or null to input this string and not a NULL value
00132         //case 'null':
00133         //    break;
00134         case '':
00135             switch ($type) {
00136                 case 'enum':
00137                     // if we have an enum, then construct the value
00138                         if (!empty($fval)) {
00139                             $val     = implode(',', $fval);
00140                             if ($val == 'null') {
00141                                 // void
00142                             } else {
00143                                 // the data here is not urlencoded!
00144                                 //$val = "'" . PMA_sqlAddslashes(urldecode($val)) . "'";
00145                                 $val = "'" . PMA_sqlAddslashes($val) . "'";
00146                             }
00147                         } else {
00148                             $val     = "''";
00149                         }
00150                         break;
00151                 case 'set':
00152                     // if we have a set, then construct the value
00153                     if (!empty($fval)) {
00154                         $val = implode(',', $fval);
00155                         // the data here is not urlencoded!
00156                         //$val = "'" . PMA_sqlAddslashes(urldecode($val)) . "'";
00157                         $val = "'" . PMA_sqlAddslashes($val) . "'";
00158                     } else {
00159                         $val = "''";
00160                     }
00161                     break;
00162                 case 'foreign':
00163                     // if we have a foreign key, then construct the value
00164                     if (!empty($fval)) {
00165                         $val     = implode(',', $fval);
00166                         if ($val == 'null') {
00167                             // void
00168                         } else {
00169                             // the data here is not urlencoded!
00170                             //$val = "'" . PMA_sqlAddslashes(urldecode($val)) . "'";
00171                             $val = "'" . PMA_sqlAddslashes($val) . "'";
00172                         }
00173                     } else {
00174                         $val     = "''";
00175                     }
00176                     break;
00177                 case 'protected':
00178                     // here we are in protected mode (asked in the config)
00179                     // so tbl_change has put this special value in the
00180                     // fields array, so we do not change the field value
00181                     // but we can still handle field upload
00182 
00183                     // garvin: when in UPDATE mode, do not alter field's contents. When in INSERT
00184                     // mode, insert empty field because no values were submitted. If protected
00185                     // blobs where set, insert original fields content.
00186                     if (isset($fieldlist)) {
00187                         if (isset($prot_row) && isset($prot_row[$key]) && !empty($prot_row[$key])) {
00188                             $val = '0x' . bin2hex($prot_row[$key]);
00189                             $seen_binary = TRUE;
00190                         } else {
00191                             $val = "''";
00192                         }
00193                     } else {
00194                         unset($val);
00195                     }
00196 
00197                     break;
00198                 default:
00199                     $val = "'" . PMA_sqlAddslashes($val) . "'";
00200                     break;
00201             }
00202             break;
00203         default:
00204             $val = "'" . PMA_sqlAddslashes($val) . "'";
00205             break;
00206     } // end switch
00207 
00208     // Was the Null checkbox checked for this field?
00209     // (if there is a value, we ignore the Null checkbox: this could
00210     // be possible if Javascript is disabled in the browser)
00211     if (isset($me_fields_null) && isset($me_fields_null[$encoded_key])
00212         && $val=="''") {
00213         $val = 'NULL';
00214     }
00215 }  // end else (field value in the form)
00216 ?>


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