2168401a47
fields contents, if no new file was uploaded. Moved is_uploaded_file function from read_dump.php3 to common.lib.php3 for reusability.
121 lines
5.2 KiB
PHP
Executable File
121 lines
5.2 KiB
PHP
Executable File
<?php
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/* $Id$ */
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// vim: expandtab sw=4 ts=4 sts=4:
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// note: grab_globals has extracted the fields from _FILES
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// or HTTP_POST_FILES
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// f i e l d u p l o a d e d f r o m a f i l e
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// garvin: original if-clause checked, whether input was stored in a possible fields_upload_XX var.
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// Now check, if the field is set. If it is empty or a malicious file, do not alter fields contents.
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// If an empty or invalid file is specified, the binary data gets deleter. Maybe a nice
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// new text-variable is appropriate to document this behaviour.
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// garvin: security cautions! You could trick the form and submit any file the webserver has access to
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// for upload to a binary field. Shouldn't be that easy! ;)
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if (isset(${"fields_upload_" . $key}) && ${"fields_upload_" . $key} != 'none'){
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// garvin: This fields content is a blob-file upload.
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if (!empty(${"fields_upload_" . $key})) {
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// garvin: The blob-field is not empty. Check what we have there.
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$data_file = ${"fields_upload_" . $key};
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if (is_uploaded_file($data_file)) {
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// garvin: A valid uploaded file is found. Look into the file...
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$val = fread(fopen($data_file, "rb"), filesize($data_file));
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// nijel: This is probably the best way how to put binary data
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// into MySQL and it also allow not to care about charset
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// conversion that would otherwise corrupt the data.
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if (empty($val)) {
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// garvin: an empty file was uploaded. Remove blob-field's contents.
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$val = "''";
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} else {
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// garvin: The upload was valid. Check in new blob-field's contents.
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$val = '0x' . bin2hex($val);
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$seen_binary = TRUE;
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}
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} else {
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// garvin: Danger, will robinson. File is malicious. Preserver blob-field contents.
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unset($val);
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}
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} else {
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// garvin: Post-field contains no data. PRESERVE BLOB-FIELD CONTENTS!
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unset($val);
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}
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// garvin: else-case would be, no file was submitted, the post-fields content's are empty.
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} else {
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// f i e l d v a l u e i n t h e f o r m
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switch (strtolower($val)) {
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case 'null':
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break;
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case '$enum$':
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// if we have an enum, then construct the value
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$f = 'field_' . md5($key);
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if (!empty($$f)) {
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$val = implode(',', $$f);
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if ($val == 'null') {
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// void
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} else {
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$val = "'" . PMA_sqlAddslashes(urldecode($val)) . "'";
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}
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} else {
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$val = "''";
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}
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break;
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case '$set$':
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// if we have a set, then construct the value
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$f = 'field_' . md5($key);
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if (!empty($$f)) {
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$val = implode(',', $$f);
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$val = "'" . PMA_sqlAddslashes(urldecode($val)) . "'";
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} else {
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$val = "''";
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}
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break;
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case '$foreign$':
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// if we have a foreign key, then construct the value
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$f = 'field_' . md5($key);
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if (!empty($$f)) {
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$val = implode(',', $$f);
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if ($val == 'null') {
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// void
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} else {
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$val = "'" . PMA_sqlAddslashes(urldecode($val)) . "'";
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}
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} else {
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$val = "''";
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}
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break;
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case '$protected$':
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// here we are in protected mode (asked in the config)
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// so tbl_change has put this special value in the
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// fields array, so we do not change the field value
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// but we can still handle field upload
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$val = "''";
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break;
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default:
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if (get_magic_quotes_gpc()) {
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$val = "'" . str_replace('\\"', '"', $val) . "'";
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} else {
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$val = "'" . PMA_sqlAddslashes($val) . "'";
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}
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break;
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} // end switch
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// Was the Null checkbox checked for this field?
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// (if there is a value, we ignore the Null checkbox: this could
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// be possible if Javascript is disabled in the browser)
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if (isset($fields_null) && isset($fields_null[$encoded_key])
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&& $val=="''") {
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$val = 'NULL';
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}
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} // end else (field value in the form)
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?>
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