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document-server-integration/web/documentserver-example/php/ajax.php

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PHP

<?php
/**
* (c) Copyright Ascensio System SIA 2023
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
namespace OnlineEditorsExamplePhp;
use Exception;
use OnlineEditorsExamplePhp\Helpers\ConfigManager;
use OnlineEditorsExamplePhp\Helpers\ExampleUsers;
use OnlineEditorsExamplePhp\Helpers\JwtManager;
/**
* Check if the request is an AJAX request
*
* @return bool
*/
function isAjax()
{
return isset($_SERVER['HTTP_X_REQUESTED_WITH'])
&& mb_strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest';
}
/**
* Get the http origin
*
* @return string
*/
function getHttpOrigin()
{
$origin = '';
if (!empty($_SERVER['HTTP_ORIGIN'])) {
$origin = $_SERVER['HTTP_ORIGIN'];
}
return $origin;
}
/**
* Set headers that prevent caching in all the browsers
*
* @return void
*/
function nocacheHeaders()
{
$headers = [
'Expires' => 'Wed, 11 Jan 1984 05:00:00 GMT',
'Cache-Control' => 'no-cache, must-revalidate, max-age=0',
'Pragma' => 'no-cache',
];
$headers['Last-Modified'] = false;
unset($headers['Last-Modified']);
// In PHP 5.3+, make sure we are not sending a Last-Modified header.
if (function_exists('header_remove')) {
@header_remove('Last-Modified');
} else {
// In PHP 5.2, send an empty Last-Modified header, but only as a
// last resort to override a header already sent. #WP23021
foreach (headers_list() as $header) {
if (0 === mb_stripos($header, 'Last-Modified')) {
$headers['Last-Modified'] = '';
break;
}
}
}
foreach ($headers as $name => $field_value) {
@header("{$name}: {$field_value}");
}
}
/**
* Save copy as...
*
* @return array
*/
function saveas()
{
try {
$post = json_decode(file_get_contents('php://input'), true);
$fileurl = $post["url"];
$title = $post["title"];
$extension = mb_strtolower(pathinfo($title, PATHINFO_EXTENSION));
$configManager = new ConfigManager();
$allexts = array_merge(
$configManager->getConfig("docServConvert"),
$configManager->getConfig("docServEdited"),
$configManager->getConfig("docServViewd"),
$configManager->getConfig("docServFillforms")
);
$filename = GetCorrectName($title);
if (!in_array("." . $extension, $allexts)) {
$result["error"] = "File type is not supported";
return $result;
}
$headers = get_headers($fileurl, 1);
$content_length = $headers["Content-Length"];
$data = file_get_contents(str_replace(" ", "%20", $fileurl));
if ($data === false || $content_length <= 0 || $content_length >
$configManager->getConfig("fileSizeMax")) {
$result["error"] = "File size is incorrect";
return $result;
}
file_put_contents(getStoragePath($filename), $data, LOCK_EX); // write data to the new file
$userList = new ExampleUsers();
$user = $userList->getUser($_GET["user"]);
createMeta($filename, $user->id, $user->name); // and create meta data for this file
$result["file"] = $filename;
return $result;
} catch (Exception $e) {
sendlog("SaveAs: ".$e->getMessage(), "webedior-ajax.log");
$result["error"] = "error: " . 1 . "message:" . $e->getMessage();
return $result;
}
}
/**
* Uploading a file
*
* @return array
*/
function upload()
{
$configManager = new ConfigManager();
if ($_FILES['files']['error'] > 0) {
$result["error"] = 'Error ' . json_encode($_FILES['files']['error']);
return $result;
}
// get the temporary name with which the received file was saved on the server
$tmp = $_FILES['files']['tmp_name'];
// if the temporary name doesn't exist, then an error occurs
if (empty($tmp)) {
$result["error"] = 'No file sent';
return $result;
}
// check if the file was uploaded using HTTP POST
if (is_uploaded_file($tmp)) {
$filesize = $_FILES['files']['size']; // get the file size
$ext = mb_strtolower('.' . pathinfo($_FILES['files']['name'], PATHINFO_EXTENSION)); // get file extension
// check if the file size is correct (it should be less than the max file size, but greater than 0)
if ($filesize <= 0 || $filesize > $configManager->getConfig("fileSizeMax")) {
$result["error"] = 'File size is incorrect'; // if not, then an error occurs
return $result;
}
// check if the file extension is supported by the editor
if (!in_array($ext, getFileExts())) {
$result["error"] = 'File type is not supported'; // if not, then an error occurs
return $result;
}
// get the correct file name with an index if the file with such a name already exists
$filename = GetCorrectName($_FILES['files']['name']);
if (!move_uploaded_file($tmp, getStoragePath($filename))) {
$result["error"] = 'Upload failed'; // file upload error
return $result;
}
$userList = new ExampleUsers();
$user = $userList->getUser($_GET["user"]);
createMeta($filename, $user->id, $user->name); // create file meta data
} else {
$result["error"] = 'Upload failed';
return $result;
}
$result["filename"] = $filename;
$result["documentType"] = getDocumentType($filename);
return $result;
}
/**
* Tracking file changes
*
* @return array|int
*/
function track()
{
sendlog("Track START", "webedior-ajax.log");
sendlog(" _GET params: " . serialize($_GET), "webedior-ajax.log");
$result["error"] = 0;
// get the body of the post request and check if it is correct
$data = readBody();
if (!empty($data->error)) {
return $data;
}
global $_trackerStatus;
$status = $_trackerStatus[$data->status]; // get status from the request body
$userAddress = $_GET["userAddress"];
$fileName = basename($_GET["fileName"]);
sendlog(" CommandRequest status: " . $data->status, "webedior-ajax.log");
switch ($status) {
case "Editing": // status == 1
if ($data->actions && $data->actions[0]->type == 0) { // finished edit
$user = $data->actions[0]->userid; // the user who finished editing
if (array_search($user, $data->users) === false) {
// create a command request with the forcasave method
$commandRequest = commandRequest("forcesave", $data->key);
sendlog(" CommandRequest forcesave: " . serialize($commandRequest), "webedior-ajax.log");
}
}
break;
case "MustSave": // status == 2
case "Corrupted": // status == 3
$result = processSave($data, $fileName, $userAddress);
break;
case "MustForceSave": // status == 6
case "CorruptedForceSave": // status == 7
$result = processForceSave($data, $fileName, $userAddress);
break;
}
sendlog("Track RESULT: " . serialize($result), "webedior-ajax.log");
return $result;
}
/**
* Converting a file
*
* @return array
*/
function convert()
{
$post = json_decode(file_get_contents('php://input'), true);
$fileName = basename($post["filename"]);
$filePass = $post["filePass"];
$lang = $_COOKIE["ulang"];
$extension = mb_strtolower(pathinfo($fileName, PATHINFO_EXTENSION));
$internalExtension = "ooxml";
$configManager = new ConfigManager();
// check if the file with such an extension can be converted
if (in_array("." . $extension, $configManager->getConfig("docServConvert")) &&
$internalExtension != "") {
$fileUri = $post["fileUri"];
if ($fileUri == null || $fileUri == "") {
$fileUri = serverPath(true) . '/'
. "webeditor-ajax.php"
. "?type=download"
. "&fileName=" . urlencode($fileName)
. "&userAddress=" . getClientIp();
}
$key = getDocEditorKey($fileName);
try {
// convert file and get the percentage of the conversion completion
$convertedData = getConvertedData(
$fileUri,
$extension,
$internalExtension,
$key,
true,
$newFileUri,
$filePass,
$lang
);
} catch (Exception $e) {
$result["error"] = "error: " . $e->getMessage();
return $result;
}
if ($convertedData["percent"] != 100) {
$result["step"] = $convertedData["percent"];
$result["filename"] = $fileName;
$result["fileUri"] = $fileUri;
return $result;
}
// get file name without extension
$baseNameWithoutExt = mb_substr($fileName, 0, mb_strlen($fileName) - mb_strlen($extension) - 1);
// get the correct file name with an index if the file with such a name already exists
$newFileName = GetCorrectName($baseNameWithoutExt . "." . $convertedData["fileType"]);
if (($data = file_get_contents(str_replace(" ", "%20", $newFileUri))) === false) {
$result["error"] = 'Bad Request';
return $result;
}
file_put_contents(getStoragePath($newFileName), $data, LOCK_EX); // write data to the new file
$userList = new ExampleUsers();
$user = $userList->getUser($_GET["user"]);
createMeta($newFileName, $user->id, $user->name); // and create meta data for this file
// delete the original file and its history
$stPath = getStoragePath($fileName);
unlink($stPath);
delTree(getHistoryDir($stPath));
$fileName = $newFileName;
}
$result["filename"] = $fileName;
return $result;
}
/**
* Removing a file
*
* @return array|void
*/
function delete()
{
try {
$fileName = basename($_GET["fileName"]);
$filePath = getStoragePath($fileName);
unlink($filePath); // delete a file
delTree(getHistoryDir($filePath)); // delete all the elements from the history directory
} catch (Exception $e) {
sendlog("Deletion ".$e->getMessage(), "webedior-ajax.log");
$result["error"] = "error: " . $e->getMessage();
return $result;
}
}
/**
* Get file information
*
* @return array
*/
function files()
{
try {
@header("Content-Type", "application/json");
$fileId = $_GET["fileId"];
$result = getFileInfo($fileId);
return $result;
} catch (Exception $e) {
sendlog("Files ".$e->getMessage(), "webedior-ajax.log");
$result["error"] = "error: " . $e->getMessage();
return $result;
}
}
/**
* Download assets
*
* @return void
*/
function assets()
{
$fileName = basename($_GET["name"]);
$filePath = dirname(__FILE__) .
DIRECTORY_SEPARATOR . "assets" . DIRECTORY_SEPARATOR . "sample" . DIRECTORY_SEPARATOR . $fileName;
downloadFile($filePath);
}
/**
* Download a csv file
*
* @return void
*/
function csv()
{
$fileName = "csv.csv";
$filePath = dirname(__FILE__) .
DIRECTORY_SEPARATOR . "assets" . DIRECTORY_SEPARATOR . "sample" . DIRECTORY_SEPARATOR . $fileName;
downloadFile($filePath);
}
/**
* Download a file from history
*
* @return array|void
*/
function historyDownload()
{
try {
$fileName = basename($_GET["fileName"]); // get the file name
$userAddress = $_GET["userAddress"];
$ver = $_GET["ver"];
$file = $_GET["file"];
$jwtManager = new JwtManager();
if ($jwtManager->isJwtEnabled()) {
$configManager = new ConfigManager();
$jwtHeader = $configManager->getConfig("docServJwtHeader") == "" ?
"Authorization" : $configManager->getConfig("docServJwtHeader");
if (!empty(apache_request_headers()[$jwtHeader])) {
$token = $jwtManager->jwtDecode(mb_substr(
apache_request_headers()[$jwtHeader],
mb_strlen("Bearer ")
));
if (empty($token)) {
http_response_code(403);
die("Invalid JWT signature");
}
} else {
http_response_code(403);
die("Invalid JWT signature");
}
}
$histDir = getHistoryDir(getStoragePath($fileName, $userAddress));
$filePath = getVersionDir($histDir, $ver) . DIRECTORY_SEPARATOR . $file;
;
downloadFile($filePath); // download this file
} catch (Exception $e) {
sendlog("Download ".$e->getMessage(), "webedior-ajax.log");
$result["error"] = "error: File not found";
return $result;
}
}
/**
* Download a file
*
* @return array|void
*/
function download()
{
try {
$configManager = new ConfigManager();
$fileName = realpath($configManager->getConfig("storagePath"))
=== $configManager->getConfig("storagePath") ?
$_GET["fileName"] : basename($_GET["fileName"]); // get the file name
$userAddress = $_GET["userAddress"];
$isEmbedded = $_GET["&dmode"];
$jwtManager = new JwtManager();
if ($jwtManager->isJwtEnabled() && $isEmbedded == null && $userAddress) {
$jwtHeader = $configManager->getConfig("docServJwtHeader") == "" ?
"Authorization" : $configManager->getConfig("docServJwtHeader");
if (!empty(apache_request_headers()[$jwtHeader])) {
$token = $jwtManager->jwtDecode(mb_substr(
apache_request_headers()[$jwtHeader],
mb_strlen("Bearer ")
));
if (empty($token)) {
http_response_code(403);
die("Invalid JWT signature");
}
}
}
$filePath = getForcesavePath($fileName, $userAddress, false); // get the path to the forcesaved file version
if ($filePath == "") {
$filePath = getStoragePath($fileName, $userAddress); // get file from the storage directory
}
downloadFile($filePath); // download this file
} catch (Exception $e) {
sendlog("Download ".$e->getMessage(), "webedior-ajax.log");
$result["error"] = "error: File not found";
return $result;
}
}
/**
* Download the specified file
*
* @param string $filePath
*
* @return void
*/
function downloadFile($filePath)
{
if (file_exists($filePath)) {
if (ob_get_level()) {
ob_end_clean();
}
// write headers to the response object
@header('Content-Length: ' . filesize($filePath));
@header('Content-Disposition: attachment; filename*=UTF-8\'\'' . urldecode(basename($filePath)));
@header('Content-Type: ' . mime_content_type($filePath));
if ($fd = fopen($filePath, 'rb')) {
while (!feof($fd)) {
echo fread($fd, 1024);
}
fclose($fd);
}
exit;
}
}
/**
* Delete all the elements from the directory
*
* @param string $dir
*
* @return void|bool
*/
function delTree($dir)
{
if (!file_exists($dir) || !is_dir($dir)) {
return;
}
$files = array_diff(scandir($dir), ['.', '..']);
foreach ($files as $file) {
(is_dir("$dir/$file")) ? delTree("$dir/$file") : unlink("$dir/$file");
}
return rmdir($dir);
}
/**
* Rename file
*
* @return array
*/
function renamefile()
{
$post = json_decode(file_get_contents('php://input'), true);
$newfilename = $post["newfilename"];
$newfilenameArr = explode('.', $newfilename);
$curExt = mb_strtolower(array_pop($newfilenameArr));
$origExt = $post["ext"];
if ($origExt !== $curExt) {
$newfilename .= '.' . $origExt;
}
$dockey = $post["dockey"];
$meta = ["title" => $newfilename];
$commandRequest = commandRequest("meta", $dockey, $meta); // create a command request with the forcasave method
sendlog(" CommandRequest rename: " . serialize($commandRequest), "webedior-ajax.log");
return ["result" => $commandRequest];
}
/**
* Reference data
*
* @return array
*/
function reference()
{
$post = json_decode(file_get_contents('php://input'), true);
@header("Content-Type: application/json");
$referenceData = $post["referenceData"] ?? null;
$jwtManager = new JwtManager();
if ($referenceData) {
$instanceId = $referenceData["instanceId"];
if ($instanceId == serverPath()) {
$fileKey = json_decode(str_replace("'", "\"", $referenceData["fileKey"]));
$userAddress = $fileKey->userAddress;
if ($userAddress == getCurUserHostAddress()) {
$fileName = $fileKey->fileName;
}
}
}
if (!isset($filename) && isset($post["path"])) {
$path = basename($post["path"]);
if (file_exists(getStoragePath($path))) {
$fileName = $path;
}
}
if (!isset($fileName)) {
return ["error" => "File is not found"];
}
$data = [
"fileType" => getInternalExtension($fileName),
"url" => getDownloadUrl($fileName),
"directUrl" => $post["directUrl"] ? getDownloadUrl($fileName) : getDownloadUrl($fileName, false),
"referenceData" => [
"fileKey" => json_encode([
"fileName" => $fileName,
"userAddress" => getCurUserHostAddress()
]),
"instanceId" => serverPath(),
],
"path" => $fileName
];
if ($jwtManager->isJwtEnabled()) {
$data["token"] = $jwtManager->jwtEncode($data);
}
return $data;
}