Downloading multiple files and zip - Chrome extension

Question

Is it possible to download multiple images into the sandbox file system (without the \"save as\" dialog box, or at-max one saveas dialog) ?

after downloading them,

Answer 1

You can use zip.js for this. It does already have API for fetching contents to be zipped from HTTP (cf. zip.HttpReader constructor) and for writing generated zip on HTML5 filesystem (cf. zip.FileWriter constructor).

Here is an example using the filesystem API:

index.html file:

example.js file:

// create a zip virtual filesystem
var fs = new zip.fs.FS();

// add some files into the zip filesystem 

// add the "bbc-music.json" file in the root directory
fs.root.addHttpContent("bbc-music.json", 
  "http://www.bbc.co.uk/programmes/genres/music.json");
// add the "bbc-learning.json" file in the root directory
fs.root.addHttpContent("bbc-learning.json", 
  "http://www.bbc.co.uk/programmes/genres/learning.json");

// create a file named "test.zip" in the root directory of the HTML5 filesystem 
createFile("test.zip", function(fileEntry) {
  // export the zip content into "test.zip" file
  fs.root.exportFileEntry(fileEntry, function() {
    console.log("done");
  });
});

// function to create a file in the HTML5 temporary filesystem
function createFile(filename, callback) {
  webkitRequestFileSystem(TEMPORARY, 4 * 1024 * 1024, function(fs) {
    fs.root.getFile(filename, { create : true }, callback);
  });
}