first version of webdav save

server.js

@@ -1,6 +1,7 @@
 var PORT = 8080; //Set port for the app
 var accessToken = ""; //Can be set here or as start parameter (node server.js --accesstoken=MYTOKEN)
 var disableSmallestScreen = false; //Can be set to true if you dont want to show (node server.js --disablesmallestscreen=true)
+var enableWebDavSave = false; //Can be set to true if you want to allow webdav save (node server.js --webdavsave=true)
 
 var fs = require("fs-extra");
 var express = require('express');
@@ -11,6 +12,8 @@ const { JSDOM } = require('jsdom');
 const window = (new JSDOM('')).window;
 const DOMPurify = createDOMPurify(window);
 
+const { createClient } = require("webdav");
+
 var s_whiteboard = require("./s_whiteboard.js");
 
 var app = express();
@@ -26,6 +29,9 @@ if (process.env.accesstoken) {
 if (process.env.disablesmallestscreen) {
     disablesmallestscreen = true;
 }
+if (process.env.webdavsave) {
+    enableWebDavSave = true;
+}
 
 var startArgs = getArgs();
 if (startArgs["accesstoken"]) {
@@ -34,6 +40,9 @@ if (startArgs["accesstoken"]) {
 if (startArgs["disablesmallestscreen"]) {
     disableSmallestScreen = true;
 }
+if (startArgs["webdavsave"]) {
+    enableWebDavSave = true;
+}
 
 if (accessToken !== "") {
     console.log("AccessToken set to: " + accessToken);
@@ -76,8 +85,18 @@ app.post('/upload', function (req, res) { //File upload
 
     form.on('end', function () {
         if (accessToken === "" || accessToken == formData["fields"]["at"]) {
-            progressUploadFormData(formData);
-            res.send("done");
+            progressUploadFormData(formData, function (err) {
+                if (err) {
+                    if (err == "403") {
+                        res.status(403);
+                    } else {
+                        res.status(500);
+                    }
+                    res.end();
+                } else {
+                    res.send("done");
+                }
+            });
         } else {
             res.status(401);  //Unauthorized
             res.end();
@@ -87,7 +106,7 @@ app.post('/upload', function (req, res) { //File upload
     form.parse(req);
 });
 
-function progressUploadFormData(formData) {
+function progressUploadFormData(formData, callback) {
     console.log("Progress new Form Data");
     var fields = escapeAllContentStrings(formData.fields);
     var files = formData.files;
@@ -96,7 +115,12 @@ function progressUploadFormData(formData) {
     var name = fields["name"] || "";
     var date = fields["date"] || (+new Date());
     var filename = whiteboardId + "_" + date + ".png";
-
+    var webdavaccess = fields["webdavaccess"] || false;
+    try {
+        webdavaccess = JSON.parse(webdavaccess);
+    } catch (e) {
+        webdavaccess = false;
+    }
     fs.ensureDir("./public/uploads", function (err) {
         if (err) {
             console.log("Could not create upload folder!", err);
@@ -109,14 +133,61 @@ function progressUploadFormData(formData) {
             fs.writeFile('./public/uploads/' + filename, imagedata, 'base64', function (err) {
                 if (err) {
                     console.log("error", err);
+                    callback(err);
+                } else {
+                    if (webdavaccess) { //Save image to webdav
+                        if (enableWebDavSave) {
+                            saveImageToWebdav('./public/uploads/' + filename, filename, webdavaccess, function (err) {
+                                if (err) {
+                                    console.log("error", err);
+                                    callback(err);
+                                } else {
+                                    callback();
+                                }
+                            })
+                        } else {
+                            callback("Webdav is not enabled on the server!");
+                        }
+                    } else {
+                        callback();
+                    }
                 }
             });
         } else {
+            callback("no imagedata!");
             console.log("No image Data found for this upload!", name);
         }
     });
 }
 
+function saveImageToWebdav(imagepath, filename, webdavaccess, callback) {
+    if (webdavaccess) {
+        var webdavserver = webdavaccess["webdavserver"] || "";
+        var webdavpath = webdavaccess["webdavpath"] || "/";
+        var webdavusername = webdavaccess["webdavusername"] || "";
+        var webdavpassword = webdavaccess["webdavpassword"] || "";
+
+        const client = createClient(
+            webdavserver,
+            {
+                username: webdavusername,
+                password: webdavpassword
+            }
+        )
+        client.getDirectoryContents(webdavpath).then((items) => {
+            var cloudpath = webdavpath+ '' + filename;
+            console.log("webdav saving to:", cloudpath);
+            fs.createReadStream(imagepath).pipe(client.createWriteStream(cloudpath));
+            callback();
+        }).catch((error) => {
+            callback("403");
+            console.log("Could not connect to webdav!")
+        });
+    } else {
+        callback("Error: no access data!")
+    }
+}
+
 var smallestScreenResolutions = {};
 io.on('connection', function (socket) {
     var whiteboardId = null;
@@ -211,4 +282,9 @@ function getArgs() {
             }
         })
     return args
-}
+}
+
+process.on('unhandledRejection', error => {
+    // Will print "unhandledRejection err is not defined"
+    console.log('unhandledRejection', error.message);
+})