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More formally meet specification, particularly If-Match and If-None-Match,

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but with a specific workaround for Evolution <= 1.8.
This commit is contained in:
Andrew McMillan 2006-10-11 13:31:36 +13:00
parent 2032c0a757
commit 17ac937376
1 changed files with 44 additions and 19 deletions
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63
inc/caldav-DELETE.php
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@ -1,35 +1,60 @@
<?php
dbg_error_log("delete", "DELETE method handler");
// The DELETE method is not sent with any wrapping XML so we simply delete it
/**
* etag_none_match, if set, is telling us only to DELETE if it fails to match. Likewise etag_if_match
* is telling us only to DELETE if it successfully matches the ETag. Se Evolution's Bugzilla for the
* truth about Evolution's broken handling of this: http://bugzilla.gnome.org/show_bug.cgi?id=349573
*/
$get_path = $_SERVER['PATH_INFO'];
$etag_none_match = str_replace('"','',$_SERVER["HTTP_IF_NONE_MATCH"]);
if ( $etag_none_match != '' ) {
/**
* etag_none_match is saying that we should only delete a row if it matches this etag
* (only rows not matching should exist afterwards, I guess.)
*/
$only_this_etag = " AND dav_etag = ".qpg($etag_none_match);
if ( !isset($etag_if_match) && isset($etag_none_match) && preg_match('#Evolution/([0-9.]+)#', $_SERVER['HTTP_USER_AGENT'], $matches ) ) {
if ( doubleval($matches[1]) <= 1.8 ) {
$etag_if_match = $etag_none_match;
unset($etag_none_match);
}
}
$qry = new PgQuery( "SELECT * FROM caldav_data WHERE user_no = ? AND dav_name = ? $only_this_etag;", $session->user_no, $get_path );
if ( $qry->Exec("caldav-DELETE") && $qry->rows == 1 ) {
$qry = new PgQuery( "DELETE FROM caldav_data WHERE user_no = ? AND dav_name = ? $only_this_etag;", $session->user_no, $get_path );
if ( $qry->Exec("caldav-DELETE") ) {
header("HTTP/1.1 200 OK");
dbg_error_log( "delete", "DELETE: User: %d, ETag: %s, Path: %s", $session->user_no, $etag_none_match, $get_path);
if ( !isset($permissions['write']) ) {
header("HTTP/1.1 403 Forbidden");
header("Content-type: text/plain");
if ( isset($etag_none_match) && $etag_none_match == $delete_row->dav_etag ) {
echo "Permission denied";
}
exit(0);
}
/**
* Wr read the resource first, so we can check if it matches (or does not match)
*/
$qry = new PgQuery( "SELECT * FROM caldav_data WHERE user_no = ? AND dav_name = ?;", (isset($path_user_no)?$path_user_no:$session->user_no), $request_path );
if ( $qry->Exec("DELETE") && $qry->rows == 1 ) {
$delete_row = $qry->Fetch();
if ( (isset($etag_none_match) && $etag_none_match == $delete_row->dav_etag) || (isset($etag_if_match) && $etag_if_match != $delete_row->dav_etag) ) {
header("HTTP/1.1 412 Precondition Failed");
header("Content-type: text/plain");
if ( isset($etag_none_match) && $etag_none_match == $delete_row->dav_etag ) {
echo "Resource matches 'If-None-Match' header - not deleted\n";
}
if ( isset($etag_if_match) && $etag_if_match != $delete_row->dav_etag ) {
echo "Resource does not match 'If-Match' header - not deleted\n";
}
exit(0);
}
$qry = new PgQuery( "DELETE FROM caldav_data WHERE user_no = ? AND dav_name = ? $only_this_etag;", $session->user_no, $request_path );
if ( $qry->Exec("DELETE") ) {
header("HTTP/1.1 200 Deleted", true, 200);
header("Content-length: 0");
dbg_error_log( "DELETE", "DELETE: User: %d, ETag: %s, Path: %s", $session->user_no, $etag_none_match, $request_path);
}
else {
header("HTTP/1.1 500 Infernal Server Error");
dbg_error_log( "delete", "DELETE failed: User: %d, ETag: %s, Path: %s, SQL: %s", $session->user_no, $etag_none_match, $get_path, $qry->querystring);
dbg_error_log( "DELETE", "DELETE failed: User: %d, ETag: %s, Path: %s, SQL: %s", $session->user_no, $etag_none_match, $request_path, $qry->querystring);
}
}
else {
header("HTTP/1.1 404 Not Found");
dbg_error_log( "delete", "DELETE row not found: User: %d, ETag: %s, Path: %s", $qry->rows, $session->user_no, $etag_none_match, $get_path);
dbg_error_log( "DELETE", "DELETE row not found: User: %d, ETag: %s, Path: %s", $qry->rows, $session->user_no, $etag_none_match, $request_path);
}
?>