We Keep Coding

Working with automatic download file if I dont have access on the database or website

I have a task that needs to automatically download a file once the user click the button “ok”. I don't have access on the database or source code on the website, just view site access only. I don't know where and how to create it for me to start working on it. I been trying to do it using windows form but I'm not sure if its possible since the application is in the website.
How I can start doing this automatic download without any access on the applications code?

You can use the System.Net.WebClient to download a file from the web.
However you should find a pattern in the file uri.
Here is a sample:
var FileDownload = "http://addressforthefile.pdf";
var FileSaveLocation = #"C:\Downloads\myfile.pdf";
var WebClient = new System.Net.WebClient();
WebClient.DownloadFile(FileDownload, FileSaveLocation);

Open HTML file in extension package with window.html

I'm making a browser extension and I have a credentialManager.html file that I want to open in a new window. Currently doing this
var credentialWindow = window.open("credentialManager.html",
"Credential Manager", "width=150,height=250")
but it just appends credentialManager.html onto whatever website domain I'm on and opens that. I want it to open the file with that name, which is in the extension package. Thoughts?

Found the solution: to access a .html file in the extension package you use the following
var credentialWindow = window.open("ms-browser-extension://[id of extension]/[name of html file].html", "[name your popup window]", "width=[some num],height=[some num]");

Node.js - download and save PDF file locally for offline - file damaged

I currently have a desktop App built with Node Webkit. When the user is online, the App will open up PDF files from the server. I then save these files locally so they are available when offline.
I am using the Node.js File System's fs.writeFile(), to save the PDF locally but when trying to open it via the App the PDF is blank. When I try to open it direct from the folder I get the below error.
Can anyone please advise?
//save PDF file for offline
function saveFile(pdfvar) {
var filename = 'test.pdf';
fs.writeFile(filename, pdfvar);
}
//open PDF in new window
$('#stage').on('click', '#pdflink', function(event){
var pdfvar = (this.getAttribute('data-pdffile'));
window.open(pdfvar, "_blank");
if(online===true){
saveFile(pdfvar);
}
});

Are you holding entire content of a PDF in a DOM element attribute this.getAttribute('data-pdffile') ? This is where it may get corrupted.
When you call
window.open(pdfvar, "_blank");
the content is not ready to be opened like that. It should be first converted to base64 encoded url.
window.open('data:application/pdf,' + escape(pdfvar));
UPDATE:
The actual problem was that the OP was trying to save the file using it's URL in "pdfvar"
fs.writeFile(filename, pdfvar);
but the file created was containing only a URL itself. What was required was downloading the file first using a http library:
How to download a file with Node.js (without using third-party libraries)?

Js - Cache file, open it, detect changes and upload

I have a file structure on a web page, and look for a solution for the following scenario:
The chosen file should be downloaded in browser cache and opened (if it's an excel document, open with excel, etc.).
Now when the user changes the file, it should be detected and the file should be uploaded again.
Is this even possible with JavaScript?
If yes, where do I store the file (temporary internet folder?) and how do I detect the changes?

The only way for this to work you would need to have the user select the downloaded file, and then check for modification.
HTML
<label for="excelFile">Select the excel file: </label><input type="file" id="excelFile" />
JS
//Change event to detect when the user has selected a file
document.querySelector("#excelFile").addEventListener("change",function(e){
//get the selected file
var file = this.files[0];
//get the last modified date
var lastModified = file.lastModified;
//check lastModified against stored lastModified
//this assumes you store the last mod in localStorage
if(localStorage['excelLastMod'] < lastModified){
//It has modified update last mod
localStorage['excelLastMod'] = lastModified;
//do upload
}
});
If you know your user is using Chrome you can use Chrome's FileSystem api

The way you describe it: No, that is not possible in JavaScript.
It sounds like you want an FTP client.
When the user changes the file, it should be detected and the file should be uploaded again.
That is not possible due to JS having almost no access to the file system.
The only way you can access a file at all is by requesting the user to select one, see:
How to open a local disk file with Javascript?
So the most you could do would be:
File is downloaded.
Based on browser & settings, file may be opened automatically, or not.
User is presented with a file selection dialog that they can use when they are done editing.
Compare selected file to file on server and upload if changed.
After downloading a file, you have no control over it.
For applications that have a protocol registered (such a steam://, for example), you might be able to request the URL being opened in a program, but that would require an if per file type/program.
Detecting file changes is not at all possible (because you have no access to the file), and uploading again requires the user to select the file manually, using a file dialog.

Thanks for your help and ideas. I saw a software (https://www.group-office.com/) which includes this function so there has to be way to do it.
New Idea, using chrome filesystem api (#Siguza already said it):
Create file from servers database on users local filesystem with filesystem api
open file locally (should work with filesystem:http://www.example.com/persistent/info.txt, or?)
poll last changes of file every x seconds
if change detected, upload file back to servers database
I saw some problems with excel locking the files Check if file has changed using HTML5 File API
but except of that this should work, shouldn't it?

Save a pdf file with TideSDK

I have a decodification problem.
I have an offline desktop application, where I have to generate a pdf file and save at his open.
To generate the PDF file I use BytescoutPDF library createpdf.js.
This returns a document variable that I have to save.
I tried with:
//this calls the createPDF to BytescoutPDF library
//and returns the variable into 'doc'
var doc = generaStaticPartBolla_2();
//take the stream
var bolla = Ti.Filesystem.getFileStream(billPath);
//open in write mode
bolla.open(Ti.Filesystem.MODE_WRITE);
//write the doc file decodified in Base 64
bolla.write(doc.getBase64Text());
//close the stream
bolla.close();
Now, the file generated is currupted.
I'm not able to open this. How can I do this? The file must be converted in Base 64 or other?

I don't know if you have solved your issue now, but I had the same requirements : offline app, generating pdf from HTML, and in my case, styling the generated pdf with CSS.
After trying many solutions, the main problem was to style with CSS.
Finally I used WkhtmlToPdf (http://wkhtmltopdf.org/). Basically I embed the binaries (for mac os and for windows) in the app, and regarding the platform, I execute them with the Ti.Process method.
WkhtmlToPdf generates a pdf in the specified path, so in this way, you will be able to open this pdf.
(In order to set the path for the pdf, i use openSaveAsDialog (http://tidesdk.multipart.net/docs/user-dev/generated/#!/api/Ti.UI.UserWindow-method-openFileChooserDialog) which allows the user to set the path and the name of the generated pdf).