nodejs: add ability to use custom path for storage-folder

web/documentserver-example/nodejs/README.md

@@ -19,10 +19,14 @@ Download the [Node.js example](https://api.onlyoffice.com/editors/demopreview) f
 You need to connect the editors to your website. Specify the path to the editors installation in the *config/default.json* file:
 
 ```
+"storageFolder": "./files"
+"storagePath": "/files"
 "siteUrl": "https://documentserver/"
 ```
 
 where the **documentserver** is the name of the server with the ONLYOFFICE Document Server installed.
+**storageFolder** and **storagePath** is the path where files will created and stored, you can set an absolute path, for example **D:\\\\folder**.
+Note, use double backslash as separator.
 
 If you want to experiment with the editor configuration, modify the [parameters](https://api.onlyoffice.com/editors/advanced) in the *\views\editor.ejs* file.
 
@@ -117,10 +121,18 @@ See the detailed guide to learn how to [install Document Server for Linux](https
 	Edit the following line:
 
     ```
+    "storageFolder": "./files"
+    "storagePath": "/files"
     "siteUrl": "https://documentserver/"
     ```
 
 	where the **documentserver** is the name of the server with the ONLYOFFICE Document Server installed.
+   **storageFolder** and **storagePath** is the path where files will created and stored.
+   Note, you must have read and write permissions to folder.
+   If not, please, use next command:
+   ```
+   sudo chmod -R ugo+rw /{path}
+   ```
 
 6. Run the project with Node.js:
 

web/documentserver-example/nodejs/app.js

@@ -729,7 +729,8 @@ app.get("/editor", function (req, res) {  // define a handler for editing docume
                         key: historyData[i-2].key,
                         url: historyData[i-2].url,
                     };
-                    historyD.changesUrl = docManager.getlocalFileUri(fileName, i-1) + "/diff.zip";  // get the path to the diff.zip file and write it to the history object
+                    let changesUrl = docManager.getlocalFileUri(fileName, i-1);
+                    historyD.changesUrl = changesUrl.includes("diff.zip") ? changesUrl : changesUrl + "/diff.zip";  // get the path to the diff.zip file and write it to the history object
                 }
 
                 historyData.push(historyD);

web/documentserver-example/nodejs/helpers/docManager.js

@@ -151,7 +151,12 @@ docManager.getFileUri = function (fileName) {
 docManager.getlocalFileUri = function (fileName, version, forDocumentServer) {
     const serverPath = docManager.getServerUrl(forDocumentServer);
     const hostAddress = docManager.curUserHostAddress();
-    const url = serverPath + configServer.get("storagePath") + "/" + hostAddress + "/" + encodeURIComponent(fileName);  // get full url address to the file
+    let url = serverPath + configServer.get("storagePath") + "/" + hostAddress + "/" + encodeURIComponent(fileName);  // get full url address to the file
+    if (path.isAbsolute(configServer.get("storageFolder"))) {
+        let separator = configServer.get("storagePath").includes("/") ? "/" : "\\";
+        url = docManager.getDownloadUrl(fileName + "-history" + separator + version + separator + "diff.zip");
+        return url;
+    }
     if (!version) {
         return url;
     }
@@ -193,14 +198,14 @@ docManager.getDownloadUrl = function (fileName) {
 // get the storage path of the given file
 docManager.storagePath = function (fileName, userAddress) {
     fileName = fileUtility.getFileName(fileName);  // get the file name with extension
-    const directory = path.join(docManager.dir, docManager.curUserHostAddress(userAddress));  // get the path to the directory for the host address
+    const directory = path.isAbsolute(docManager.dir) ? docManager.dir : path.join(docManager.dir, docManager.curUserHostAddress(userAddress));  // get the path to the directory for the host address
     this.createDirectory(directory);  // create a new directory if it doesn't exist
     return path.join(directory, fileName);  // put the given file to this directory
 };
 
 // get the path to the forcesaved file version
 docManager.forcesavePath = function (fileName, userAddress, create) {
-    let directory = path.join(docManager.dir, docManager.curUserHostAddress(userAddress));
+    let directory = path.isAbsolute(docManager.dir) ? docManager.dir : path.join(docManager.dir, docManager.curUserHostAddress(userAddress));
     if (!this.existsSync(directory)) {  // the directory with host address doesn't exist
         return "";
     }
@@ -218,7 +223,7 @@ docManager.forcesavePath = function (fileName, userAddress, create) {
 
 // create the path to the file history
 docManager.historyPath = function (fileName, userAddress, create) {
-    let directory = path.join(docManager.dir, docManager.curUserHostAddress(userAddress));
+    let directory =  path.isAbsolute(docManager.dir) ? docManager.dir : path.join(docManager.dir, userAddress);
     if (!this.existsSync(directory)) {
         return "";
     }
@@ -263,7 +268,7 @@ docManager.changesUser = function (fileName, userAddress, version) {
 // get all the stored files
 docManager.getStoredFiles = function () {
     const userAddress = docManager.curUserHostAddress();
-    const directory = path.join(docManager.dir, userAddress);
+    const directory = path.isAbsolute(docManager.dir) ? docManager.dir : path.join(docManager.dir, userAddress);
     this.createDirectory(directory);
     const result = [];
     const storedFiles = fileSystem.readdirSync(directory);  // read the user host directory contents
@@ -441,7 +446,7 @@ docManager.cleanFolderRecursive = function (folder, me) {
 // get files information
 docManager.getFilesInfo = function (fileId) {
     const userAddress = docManager.curUserHostAddress();
-    const directory = path.join(docManager.dir, userAddress);
+    const directory = path.isAbsolute(docManager.dir) ? docManager.dir : path.join(docManager.dir, userAddress);
     const filesInDirectory = this.getStoredFiles();  // get all the stored files from the folder
     let responseArray = [];
     let responseObject;