save and change the name of the file with chrome.filesystem

问题

Is this possible with chrome.fileSystem to save a file on the client's disk, but by changing the file name. For example, I compress a file and I want that file is stored on the disc with my new name newFile.min.js for example. I can save the file to disk, but not to change its name. And what I would like is that everything is done in a "silent" without a window that asks for the location.

Here is the function I use to save my files:

    function saveToEntry(entry, result) {
  setTitle();

  var blob = new Blob([result], {type: 'text/plain'});
  currentEntry.createWriter(function(writer) {
    writer.onwrite = function() {
      writer.onwrite = null;
      writer.write(blob);
    }
    writer.truncate(blob.size);
  });
}

function setTitle() {
  chrome.fileSystem.getDisplayPath(
      currentEntry,
      function(path) {
console.log(path);
        document.title = path;
      });
}

Is this possible? And if so, if you have any example to guide me would be great. If not, would be great too :)

Thank you in advance for your advice!

回答1:

For that (saving in a separate file), I'm afraid that you need to ask the user for write access for a folder, not an individual file. Then you will be able to create a new file in it.

I suggest that you either ask the user to select a "working" directory, present an in-app file picker from that folder, and save the result next to the normal file.

Alternatively, ask the user to select an "output" folder, and dump the results there.

---

Another solution would be to require a Native Host module. You'll be able to access the system with the same rights as the user. It will limit your deployment options though: you'll need a separate installer for your module that can't be hosted on Chrome Web Store.

来源：https://stackoverflow.com/questions/28460704/save-and-change-the-name-of-the-file-with-chrome-filesystem