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request.php
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request.php
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<?php
/***********************************************
* File : request.php
* Project : Z-Push
* Descr : This file contains the actual
* request handling routines.
* The request handlers are optimised
* so that as little as possible
* data is kept-in-memory, and all
* output data is directly streamed
* to the client, while also streaming
* input data from the client.
*
* Created : 01.10.2007
*
* Copyright 2007 - 2010 Zarafa Deutschland GmbH
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation with the following additional
* term according to sec. 7:
*
* According to sec. 7 of the GNU Affero General Public License, version 3,
* the terms of the AGPL are supplemented with the following terms:
*
* "Zarafa" is a registered trademark of Zarafa B.V.
* "Z-Push" is a registered trademark of Zarafa Deutschland GmbH
* The licensing of the Program under the AGPL does not imply a trademark license.
* Therefore any rights, title and interest in our trademarks remain entirely with us.
*
* However, if you propagate an unmodified version of the Program you are
* allowed to use the term "Z-Push" to indicate that you distribute the Program.
* Furthermore you may use our trademarks where it is necessary to indicate
* the intended purpose of a product or service provided you use it in accordance
* with honest practices in industrial or commercial matters.
* If you want to propagate modified versions of the Program under the name "Z-Push",
* you may only do so if you have a written permission by Zarafa Deutschland GmbH
* (to acquire a permission please contact Zarafa at [email protected]).
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Consult LICENSE file for details
************************************************/
include_once("proto.php");
include_once("wbxml.php");
include_once("statemachine.php");
include_once("backend/backend.php");
include_once("memimporter.php");
include_once("streamimporter.php");
include_once("zpushdtd.php");
include_once("zpushdefs.php");
include_once("include/utils.php");
function GetObjectClassFromFolderClass($folderclass)
{
$classes = array ( "Email" => "syncmail", "Contacts" => "synccontact", "Calendar" => "syncappointment", "Tasks" => "synctask" );
return $classes[$folderclass];
}
function HandleMoveItems($backend, $protocolversion) {
global $zpushdtd;
global $input, $output;
$decoder = new WBXMLDecoder($input, $zpushdtd);
$encoder = new WBXMLEncoder($output, $zpushdtd);
if(!$decoder->getElementStartTag(SYNC_MOVE_MOVES))
return false;
$moves = array();
while($decoder->getElementStartTag(SYNC_MOVE_MOVE)) {
$move = array();
if($decoder->getElementStartTag(SYNC_MOVE_SRCMSGID)) {
$move["srcmsgid"] = $decoder->getElementContent();
if(!$decoder->getElementEndTag())
break;
}
if($decoder->getElementStartTag(SYNC_MOVE_SRCFLDID)) {
$move["srcfldid"] = $decoder->getElementContent();
if(!$decoder->getElementEndTag())
break;
}
if($decoder->getElementStartTag(SYNC_MOVE_DSTFLDID)) {
$move["dstfldid"] = $decoder->getElementContent();
if(!$decoder->getElementEndTag())
break;
}
array_push($moves, $move);
if(!$decoder->getElementEndTag())
return false;
}
if(!$decoder->getElementEndTag())
return false;
$encoder->StartWBXML();
$encoder->startTag(SYNC_MOVE_MOVES);
foreach($moves as $move) {
$encoder->startTag(SYNC_MOVE_RESPONSE);
$encoder->startTag(SYNC_MOVE_SRCMSGID);
$encoder->content($move["srcmsgid"]);
$encoder->endTag();
$importer = $backend->GetContentsImporter($move["srcfldid"]);
$result = $importer->ImportMessageMove($move["srcmsgid"], $move["dstfldid"]);
// We discard the importer state for now.
$encoder->startTag(SYNC_MOVE_STATUS);
$encoder->content($result ? 3 : 1);
$encoder->endTag();
$encoder->startTag(SYNC_MOVE_DSTMSGID);
$encoder->content(is_string($result)?$result:$move["srcmsgid"]);
$encoder->endTag();
$encoder->endTag();
}
$encoder->endTag();
return true;
}
function HandleNotify($backend, $protocolversion) {
global $zpushdtd;
global $input, $output;
$decoder = new WBXMLDecoder($input, $zpushdtd);
$encoder = new WBXMLEncoder($output, $zpushdtd);
if(!$decoder->getElementStartTag(SYNC_AIRNOTIFY_NOTIFY))
return false;
if(!$decoder->getElementStartTag(SYNC_AIRNOTIFY_DEVICEINFO))
return false;
if(!$decoder->getElementEndTag())
return false;
if(!$decoder->getElementEndTag())
return false;
$encoder->StartWBXML();
$encoder->startTag(SYNC_AIRNOTIFY_NOTIFY);
{
$encoder->startTag(SYNC_AIRNOTIFY_STATUS);
$encoder->content(1);
$encoder->endTag();
$encoder->startTag(SYNC_AIRNOTIFY_VALIDCARRIERPROFILES);
$encoder->endTag();
}
$encoder->endTag();
return true;
}
// Handle GetHierarchy method - simply returns current hierarchy of all folders
function HandleGetHierarchy($backend, $protocolversion, $devid) {
global $zpushdtd;
global $output;
// Input is ignored, no data is sent by the PIM
$encoder = new WBXMLEncoder($output, $zpushdtd);
$folders = $backend->GetHierarchy();
if(!$folders)
return false;
// save folder-ids for fourther syncing
_saveFolderData($devid, $folders);
$encoder->StartWBXML();
$encoder->startTag(SYNC_FOLDERHIERARCHY_FOLDERS);
foreach ($folders as $folder) {
$encoder->startTag(SYNC_FOLDERHIERARCHY_FOLDER);
$folder->encode($encoder);
$encoder->endTag();
}
$encoder->endTag();
return true;
}
// Handles a 'FolderSync' method - receives folder updates, and sends reply with
// folder changes on the server
function HandleFolderSync($backend, $protocolversion) {
global $zpushdtd;
global $input, $output;
// Maps serverid -> clientid for items that are received from the PIM
$map = array();
$decoder = new WBXMLDecoder($input, $zpushdtd);
$encoder = new WBXMLEncoder($output, $zpushdtd);
// Parse input
if(!$decoder->getElementStartTag(SYNC_FOLDERHIERARCHY_FOLDERSYNC))
return false;
if(!$decoder->getElementStartTag(SYNC_FOLDERHIERARCHY_SYNCKEY))
return false;
$synckey = $decoder->getElementContent();
if(!$decoder->getElementEndTag())
return false;
// First, get the syncstate that is associated with this synckey
$statemachine = new StateMachine();
// The state machine will discard any sync states before this one, as they are no
// longer required
$syncstate = $statemachine->getSyncState($synckey);
// additional information about already seen folders
$sfolderstate = $statemachine->getSyncState("s".$synckey);
if (!$sfolderstate) {
$foldercache = array();
if ($sfolderstate === false)
debugLog("Error: FolderChacheState for state 's". $synckey ."' not found. Reinitializing...");
}
else {
$foldercache = unserialize($sfolderstate);
// transform old seenfolder array
if (array_key_exists("0", $foldercache)) {
$tmp = array();
foreach($foldercache as $s) $tmp[$s] = new SyncFolder();
$foldercache = $tmp;
}
}
// We will be saving the sync state under 'newsynckey'
$newsynckey = $statemachine->getNewSyncKey($synckey);
$changes = false;
if($decoder->getElementStartTag(SYNC_FOLDERHIERARCHY_CHANGES)) {
// Ignore <Count> if present
if($decoder->getElementStartTag(SYNC_FOLDERHIERARCHY_COUNT)) {
$decoder->getElementContent();
if(!$decoder->getElementEndTag())
return false;
}
// Process the changes (either <Add>, <Modify>, or <Remove>)
$element = $decoder->getElement();
if($element[EN_TYPE] != EN_TYPE_STARTTAG)
return false;
while(1) {
$folder = new SyncFolder();
if(!$folder->decode($decoder))
break;
// Configure importer with last state
$importer = $backend->GetHierarchyImporter();
$importer->Config($syncstate);
switch($element[EN_TAG]) {
case SYNC_ADD:
case SYNC_MODIFY:
$serverid = $importer->ImportFolderChange($folder);
// add folder to the serverflags
$foldercache[$serverid] = $folder;
$changes = true;
break;
case SYNC_REMOVE:
$serverid = $importer->ImportFolderDeletion($folder);
$changes = true;
// remove folder from the folderchache
if (array_key_exists($serverid, $foldercache))
unset($foldercache[$serverid]);
break;
}
if($serverid)
$map[$serverid] = $folder->clientid;
}
if(!$decoder->getElementEndTag())
return false;
}
if(!$decoder->getElementEndTag())
return false;
// We have processed incoming foldersync requests, now send the PIM
// our changes
// The MemImporter caches all imports in-memory, so we can send a change count
// before sending the actual data. As the amount of data done in this operation
// is rather low, this is not memory problem. Note that this is not done when
// sync'ing messages - we let the exporter write directly to WBXML.
$importer = new ImportHierarchyChangesMem($foldercache);
// Request changes from backend, they will be sent to the MemImporter passed as the first
// argument, which stores them in $importer. Returns the new sync state for this exporter.
$exporter = $backend->GetExporter();
$exporter->Config($importer, false, false, $syncstate, 0, 0);
while(is_array($exporter->Synchronize()));
// Output our WBXML reply now
$encoder->StartWBXML();
$encoder->startTag(SYNC_FOLDERHIERARCHY_FOLDERSYNC);
{
$encoder->startTag(SYNC_FOLDERHIERARCHY_STATUS);
$encoder->content(1);
$encoder->endTag();
$encoder->startTag(SYNC_FOLDERHIERARCHY_SYNCKEY);
// only send new synckey if changes were processed or there are outgoing changes
$encoder->content((($changes || $importer->count > 0)?$newsynckey:$synckey));
$encoder->endTag();
$encoder->startTag(SYNC_FOLDERHIERARCHY_CHANGES);
{
$encoder->startTag(SYNC_FOLDERHIERARCHY_COUNT);
$encoder->content($importer->count);
$encoder->endTag();
if(count($importer->changed) > 0) {
foreach($importer->changed as $folder) {
// send a modify flag if the folder is already known on the device
if (isset($folder->serverid) && array_key_exists($folder->serverid, $foldercache) !== false)
$encoder->startTag(SYNC_FOLDERHIERARCHY_UPDATE);
else
$encoder->startTag(SYNC_FOLDERHIERARCHY_ADD);
$foldercache[$folder->serverid] = $folder;
$folder->encode($encoder);
$encoder->endTag();
}
}
if(count($importer->deleted) > 0) {
foreach($importer->deleted as $folder) {
$encoder->startTag(SYNC_FOLDERHIERARCHY_REMOVE);
$encoder->startTag(SYNC_FOLDERHIERARCHY_SERVERENTRYID);
$encoder->content($folder);
$encoder->endTag();
$encoder->endTag();
// remove folder from the folderchache
if (array_key_exists($folder, $foldercache))
unset($foldercache[$folder]);
}
}
}
$encoder->endTag();
}
$encoder->endTag();
// Save the sync state for the next time
$syncstate = $exporter->GetState();
$statemachine->setSyncState($newsynckey, $syncstate);
$statemachine->setSyncState("s".$newsynckey, serialize($foldercache));
return true;
}
function HandleSync($backend, $protocolversion, $devid) {
global $zpushdtd;
global $input, $output;
// Contains all containers requested
$collections = array();
// Init WBXML decoder
$decoder = new WBXMLDecoder($input, $zpushdtd);
// Init state machine
$statemachine = new StateMachine();
// Start decode
if(!$decoder->getElementStartTag(SYNC_SYNCHRONIZE))
return false;
if(!$decoder->getElementStartTag(SYNC_FOLDERS))
return false;
while($decoder->getElementStartTag(SYNC_FOLDER))
{
$collection = array();
$collection["truncation"] = SYNC_TRUNCATION_ALL;
$collection["clientids"] = array();
$collection["fetchids"] = array();
if(!$decoder->getElementStartTag(SYNC_FOLDERTYPE))
return false;
$collection["class"] = $decoder->getElementContent();
debugLog("Sync folder:{$collection["class"]}");
if(!$decoder->getElementEndTag())
return false;
if(!$decoder->getElementStartTag(SYNC_SYNCKEY))
return false;
$collection["synckey"] = $decoder->getElementContent();
if(!$decoder->getElementEndTag())
return false;
if($decoder->getElementStartTag(SYNC_FOLDERID)) {
$collection["collectionid"] = $decoder->getElementContent();
if(!$decoder->getElementEndTag())
return false;
}
if($decoder->getElementStartTag(SYNC_SUPPORTED)) {
while(1) {
$el = $decoder->getElement();
if($el[EN_TYPE] == EN_TYPE_ENDTAG)
break;
}
}
if($decoder->getElementStartTag(SYNC_DELETESASMOVES))
$collection["deletesasmoves"] = true;
if($decoder->getElementStartTag(SYNC_GETCHANGES))
$collection["getchanges"] = true;
if($decoder->getElementStartTag(SYNC_MAXITEMS)) {
$collection["maxitems"] = $decoder->getElementContent();
if(!$decoder->getElementEndTag())
return false;
}
if($decoder->getElementStartTag(SYNC_OPTIONS)) {
while(1) {
if($decoder->getElementStartTag(SYNC_FILTERTYPE)) {
$collection["filtertype"] = $decoder->getElementContent();
if(!$decoder->getElementEndTag())
return false;
}
if($decoder->getElementStartTag(SYNC_TRUNCATION)) {
$collection["truncation"] = $decoder->getElementContent();
if(!$decoder->getElementEndTag())
return false;
}
if($decoder->getElementStartTag(SYNC_RTFTRUNCATION)) {
$collection["rtftruncation"] = $decoder->getElementContent();
if(!$decoder->getElementEndTag())
return false;
}
if($decoder->getElementStartTag(SYNC_MIMESUPPORT)) {
$collection["mimesupport"] = $decoder->getElementContent();
if(!$decoder->getElementEndTag())
return false;
}
if($decoder->getElementStartTag(SYNC_MIMETRUNCATION)) {
$collection["mimetruncation"] = $decoder->getElementContent();
if(!$decoder->getElementEndTag())
return false;
}
if($decoder->getElementStartTag(SYNC_CONFLICT)) {
$collection["conflict"] = $decoder->getElementContent();
if(!$decoder->getElementEndTag())
return false;
}
$e = $decoder->peek();
if($e[EN_TYPE] == EN_TYPE_ENDTAG) {
$decoder->getElementEndTag();
break;
}
}
}
// limit items to be synchronized to the mobiles if configured
if (defined('SYNC_FILTERTIME_MAX') && SYNC_FILTERTIME_MAX > SYNC_FILTERTYPE_ALL &&
(!isset($collection["filtertype"]) || $collection["filtertype"] == SYNC_FILTERTYPE_ALL || $collection["filtertype"] > SYNC_FILTERTIME_MAX)) {
$collection["filtertype"] = SYNC_FILTERTIME_MAX;
}
// compatibility mode - get folderid from the state directory
if (!isset($collection["collectionid"])) {
$collection["collectionid"] = _getFolderID($devid, $collection["class"]);
}
// set default conflict behavior from config if the device doesn't send a conflict resolution parameter
if (!isset($collection["conflict"])) {
$collection["conflict"] = (defined('SYNC_CONFLICT_DEFAULT'))? SYNC_CONFLICT_DEFAULT : SYNC_CONFLICT_OVERWRITE_PIM ;
}
//compatibility mode - set maxitems if the client doesn't send it as it breaks some devices
if (!isset($collection["maxitems"])) {
$collection["maxitems"] = 100;
}
// Get our sync state for this collection
$collection["syncstate"] = $statemachine->getSyncState($collection["synckey"]);
if($decoder->getElementStartTag(SYNC_PERFORM)) {
// Configure importer with last state
$importer = $backend->GetContentsImporter($collection["collectionid"]);
$importer->Config($collection["syncstate"], $collection["conflict"]);
$nchanges = 0;
while(1) {
$element = $decoder->getElement(); // MODIFY or REMOVE or ADD or FETCH
if($element[EN_TYPE] != EN_TYPE_STARTTAG) {
$decoder->ungetElement($element);
break;
}
// before importing the first change, load potential conflicts
// for the current state
if ($nchanges == 0)
$importer->LoadConflicts($collection["class"], (isset($collection["filtertype"])) ? $collection["filtertype"] : false, $collection["syncstate"]);
$nchanges++;
if($decoder->getElementStartTag(SYNC_SERVERENTRYID)) {
$serverid = $decoder->getElementContent();
if(!$decoder->getElementEndTag()) // end serverid
return false;
} else {
$serverid = false;
}
if($decoder->getElementStartTag(SYNC_CLIENTENTRYID)) {
$clientid = $decoder->getElementContent();
if(!$decoder->getElementEndTag()) // end clientid
return false;
} else {
$clientid = false;
}
// Get application data if available
if($decoder->getElementStartTag(SYNC_DATA)) {
switch($collection["class"]) {
case "Email":
$appdata = new SyncMail();
$appdata->decode($decoder);
break;
case "Contacts":
$appdata = new SyncContact($protocolversion);
$appdata->decode($decoder);
break;
case "Calendar":
$appdata = new SyncAppointment();
$appdata->decode($decoder);
break;
case "Tasks":
$appdata = new SyncTask();
$appdata->decode($decoder);
break;
}
if(!$decoder->getElementEndTag()) // end applicationdata
return false;
}
switch($element[EN_TAG]) {
case SYNC_MODIFY:
if(isset($appdata)) {
if(isset($appdata->read)) // Currently, 'read' is only sent by the PDA when it is ONLY setting the read flag.
$importer->ImportMessageReadFlag($serverid, $appdata->read);
else
$importer->ImportMessageChange($serverid, $appdata);
$collection["importedchanges"] = true;
}
break;
case SYNC_ADD:
if(isset($appdata)) {
$id = $importer->ImportMessageChange(false, $appdata);
if($clientid && $id) {
$collection["clientids"][$clientid] = $id;
$collection["importedchanges"] = true;
}
}
break;
case SYNC_REMOVE:
if(isset($collection["deletesasmoves"])) {
$folderid = $backend->GetWasteBasket($collection["class"]);
if($folderid) {
$importer->ImportMessageMove($serverid, $folderid);
$collection["importedchanges"] = true;
break;
}
}
$importer->ImportMessageDeletion($serverid);
$collection["importedchanges"] = true;
break;
case SYNC_FETCH:
array_push($collection["fetchids"], $serverid);
break;
}
if(!$decoder->getElementEndTag()) // end change/delete/move
return false;
}
debugLog("Processed $nchanges incoming changes");
// Save the updated state, which is used for the exporter later
$collection["syncstate"] = $importer->getState();
if(!$decoder->getElementEndTag()) // end commands
return false;
}
if(!$decoder->getElementEndTag()) // end collection
return false;
array_push($collections, $collection);
}
if(!$decoder->getElementEndTag()) // end collections
return false;
if(!$decoder->getElementEndTag()) // end sync
return false;
$encoder = new WBXMLEncoder($output, $zpushdtd);
$encoder->startWBXML();
$encoder->startTag(SYNC_SYNCHRONIZE);
{
$encoder->startTag(SYNC_FOLDERS);
{
foreach($collections as $collection) {
// initialize exporter to get changecount
$changecount = 0;
if(isset($collection["getchanges"]) || $collection["synckey"] == "0") {
// Use the state from the importer, as changes may have already happened
$exporter = $backend->GetExporter($collection["collectionid"]);
$filtertype = isset($collection["filtertype"]) ? $collection["filtertype"] : false;
$exporter->Config($importer, $collection["class"], $filtertype, $collection["syncstate"], 0, $collection["truncation"]);
$changecount = $exporter->GetChangeCount();
}
// Get a new sync key to output to the client if any changes have been requested or will be send
if (isset($collection["importedchanges"]) || $changecount > 0 || $collection["synckey"] == "0")
$collection["newsynckey"] = $statemachine->getNewSyncKey($collection["synckey"]);
$encoder->startTag(SYNC_FOLDER);
$encoder->startTag(SYNC_FOLDERTYPE);
$encoder->content($collection["class"]);
$encoder->endTag();
$encoder->startTag(SYNC_SYNCKEY);
if(isset($collection["newsynckey"]))
$encoder->content($collection["newsynckey"]);
else
$encoder->content($collection["synckey"]);
$encoder->endTag();
$encoder->startTag(SYNC_FOLDERID);
$encoder->content($collection["collectionid"]);
$encoder->endTag();
$encoder->startTag(SYNC_STATUS);
$encoder->content(1);
$encoder->endTag();
//check the mimesupport because we need it for advanced emails
$mimesupport = isset($collection['mimesupport']) ? $collection['mimesupport'] : 0;
// Output server IDs for new items we received from the PDA
if(isset($collection["clientids"]) || count($collection["fetchids"]) > 0) {
$encoder->startTag(SYNC_REPLIES);
foreach($collection["clientids"] as $clientid => $serverid) {
$encoder->startTag(SYNC_ADD);
$encoder->startTag(SYNC_CLIENTENTRYID);
$encoder->content($clientid);
$encoder->endTag();
$encoder->startTag(SYNC_SERVERENTRYID);
$encoder->content($serverid);
$encoder->endTag();
$encoder->startTag(SYNC_STATUS);
$encoder->content(1);
$encoder->endTag();
$encoder->endTag();
}
foreach($collection["fetchids"] as $id) {
$data = $backend->Fetch($collection["collectionid"], $id, $mimesupport);
if($data !== false) {
$encoder->startTag(SYNC_FETCH);
$encoder->startTag(SYNC_SERVERENTRYID);
$encoder->content($id);
$encoder->endTag();
$encoder->startTag(SYNC_STATUS);
$encoder->content(1);
$encoder->endTag();
$encoder->startTag(SYNC_DATA);
$data->encode($encoder);
$encoder->endTag();
$encoder->endTag();
} else {
debugLog("unable to fetch $id");
}
}
$encoder->endTag();
}
if(isset($collection["getchanges"])) {
// exporter already intialized
if($changecount > $collection["maxitems"]) {
$encoder->startTag(SYNC_MOREAVAILABLE, false, true);
}
// Output message changes per folder
$encoder->startTag(SYNC_PERFORM);
// Stream the changes to the PDA
$importer = new ImportContentsChangesStream($encoder, GetObjectClassFromFolderClass($collection["class"]));
$filtertype = isset($collection["filtertype"]) ? $collection["filtertype"] : 0;
$n = 0;
while(1) {
$progress = $exporter->Synchronize();
if(!is_array($progress))
break;
$n++;
if($n >= $collection["maxitems"]) {
debugLog("Exported maxItems of messages: ". $collection["maxitems"] . " - more available");
break;
}
}
$encoder->endTag();
}
$encoder->endTag();
// Save the sync state for the next time
if(isset($collection["newsynckey"])) {
if (isset($exporter) && $exporter)
$state = $exporter->GetState();
// nothing exported, but possibly imported
else if (isset($importer) && $importer)
$state = $importer->GetState();
// if a new request without state information (hierarchy) save an empty state
else if ($collection["synckey"] == "0")
$state = "";
if (isset($state)) $statemachine->setSyncState($collection["newsynckey"], $state);
else debugLog("error saving " . $collection["newsynckey"] . " - no state information available");
}
}
}
$encoder->endTag();
}
$encoder->endTag();
return true;
}
function HandleGetItemEstimate($backend, $protocolversion, $devid) {
global $zpushdtd;
global $input, $output;
$collections = array();
$decoder = new WBXMLDecoder($input, $zpushdtd);
$encoder = new WBXMLEncoder($output, $zpushdtd);
if(!$decoder->getElementStartTag(SYNC_GETITEMESTIMATE_GETITEMESTIMATE))
return false;
if(!$decoder->getElementStartTag(SYNC_GETITEMESTIMATE_FOLDERS))
return false;
while($decoder->getElementStartTag(SYNC_GETITEMESTIMATE_FOLDER)) {
$collection = array();
if(!$decoder->getElementStartTag(SYNC_GETITEMESTIMATE_FOLDERTYPE))
return false;
$class = $decoder->getElementContent();
if(!$decoder->getElementEndTag())
return false;
if($decoder->getElementStartTag(SYNC_GETITEMESTIMATE_FOLDERID)) {
$collectionid = $decoder->getElementContent();
if(!$decoder->getElementEndTag())
return false;
}
if(!$decoder->getElementStartTag(SYNC_FILTERTYPE))
return false;
$filtertype = $decoder->getElementContent();
if(!$decoder->getElementEndTag())
return false;
if(!$decoder->getElementStartTag(SYNC_SYNCKEY))
return false;
$synckey = $decoder->getElementContent();
if(!$decoder->getElementEndTag())
return false;
if(!$decoder->getElementEndTag())
return false;
// compatibility mode - get folderid from the state directory
if (!isset($collectionid)) {
$collectionid = _getFolderID($devid, $class);
}
$collection = array();
$collection["synckey"] = $synckey;
$collection["class"] = $class;
$collection["filtertype"] = $filtertype;
$collection["collectionid"] = $collectionid;
array_push($collections, $collection);
}
$encoder->startWBXML();
$encoder->startTag(SYNC_GETITEMESTIMATE_GETITEMESTIMATE);
{
foreach($collections as $collection) {
$encoder->startTag(SYNC_GETITEMESTIMATE_RESPONSE);
{
$encoder->startTag(SYNC_GETITEMESTIMATE_STATUS);
$encoder->content(1);
$encoder->endTag();
$encoder->startTag(SYNC_GETITEMESTIMATE_FOLDER);
{
$encoder->startTag(SYNC_GETITEMESTIMATE_FOLDERTYPE);
$encoder->content($collection["class"]);
$encoder->endTag();
$encoder->startTag(SYNC_GETITEMESTIMATE_FOLDERID);
$encoder->content($collection["collectionid"]);
$encoder->endTag();
$encoder->startTag(SYNC_GETITEMESTIMATE_ESTIMATE);
$importer = new ImportContentsChangesMem();
$statemachine = new StateMachine();
$syncstate = $statemachine->getSyncState($collection["synckey"]);
$exporter = $backend->GetExporter($collection["collectionid"]);
$exporter->Config($importer, $collection["class"], $collection["filtertype"], $syncstate, 0, 0);
$encoder->content($exporter->GetChangeCount());
$encoder->endTag();
}
$encoder->endTag();
}
$encoder->endTag();
}
}
$encoder->endTag();
return true;
}
function HandleGetAttachment($backend, $protocolversion) {
$attname = $_GET["AttachmentName"];
if(!isset($attname))
return false;
header("Content-Type: application/octet-stream");
$backend->GetAttachmentData($attname);
return true;
}
function HandlePing($backend, $devid) {
global $zpushdtd, $input, $output;
global $user, $auth_pw;
$timeout = (defined('PING_INTERVAL') && PING_INTERVAL > 0) ? PING_INTERVAL : 30;
debugLog("Ping received");
$decoder = new WBXMLDecoder($input, $zpushdtd);
$encoder = new WBXMLEncoder($output, $zpushdtd);
$collections = array();
$lifetime = 0;
// Get previous defaults if they exist
$file = STATE_DIR . "/" . $devid;
if (file_exists($file)) {
$ping = unserialize(file_get_contents($file));
$collections = $ping["collections"];
$lifetime = $ping["lifetime"];
}
if($decoder->getElementStartTag(SYNC_PING_PING)) {
debugLog("Ping init");
if($decoder->getElementStartTag(SYNC_PING_LIFETIME)) {
$lifetime = $decoder->getElementContent();
$decoder->getElementEndTag();
}
if($decoder->getElementStartTag(SYNC_PING_FOLDERS)) {
// avoid ping init if not necessary
$saved_collections = $collections;
$collections = array();
while($decoder->getElementStartTag(SYNC_PING_FOLDER)) {
$collection = array();
while(1) {
if($decoder->getElementStartTag(SYNC_PING_SERVERENTRYID)) {
$collection["serverid"] = $decoder->getElementContent();
$decoder->getElementEndTag();
}
if($decoder->getElementStartTag(SYNC_PING_FOLDERTYPE)) {
$collection["class"] = $decoder->getElementContent();
$decoder->getElementEndTag();
}
$e = $decoder->peek();
if($e[EN_TYPE] == EN_TYPE_ENDTAG) {
$decoder->getElementEndTag();
break;
}
// Failsave - a devoce or attacker could send an unspecified tag which would cause an endless loop.
else if (isset($e[EN_TAG]) && $e[EN_TAG] != SYNC_PING_SERVERENTRYID && $e[EN_TAG] != SYNC_PING_FOLDERTYPE) {
debugLog("Found unspecified tag in ping folder definition:". print_r($e,1));
break;
}
}
// initialize empty state
$collection["state"] = "";
// try to find old state in saved states
foreach ($saved_collections as $saved_col) {
if ($saved_col["serverid"] == $collection["serverid"] && $saved_col["class"] == $collection["class"]) {
$collection["state"] = $saved_col["state"];
debugLog("reusing saved state for ". $collection["class"]);
break;
}
}
if ($collection["state"] == "")
debugLog("empty state for ". $collection["class"]);
// Create start state for this collection
$exporter = $backend->GetExporter($collection["serverid"]);
$importer = false;
$exporter->Config($importer, false, false, $collection["state"], BACKEND_DISCARD_DATA, 0);
while(is_array($exporter->Synchronize()));
$collection["state"] = $exporter->GetState();
array_push($collections, $collection);
}