how to extract the Zip file in client system using javascript

Question

I have a Zip file in server.i am downloading the zip file save into client system.now i want to extract file using javascript. anybody please help me. thanks in advance.

Answer 1

You can unzip zipfiles in memory, within a browser, using Javascript.

This answer shows how.

The js code in the browser looks like this:

var doneReading = function(zip){
    DoSomethingWithEntries(zip);
};

var zipFile = new ZipFile(url, doneReading); 

Inside the DoSomethingWithEntries method, which you provide, you can fiddle with an object that represents the extracted zip file.

function DoSomethingWithEntries(zip){ 
  // for each entry in the zip...
  for (var i=0; i<zip.entries.length; i++) {
    var entry = zip.entries[i];
    var entryInfo = "<h4><a>" + entry.name + "</a></h4>\n<div>";  
    // put that into a div, if you like.
    // etc...
  }
}

As shown above, you can emit lists of the entries with their name, size, date, and so on.

You can also call an extract() method on each zip entry. (not shown here) If you extract, the extraction happens asynchronously. The content gets expanded into byte arrays or strings (depending on whether the entries are binary or text) that are maintained in the memory of the browser javascript environment. You could then display the extracted content from the zipped entries, or whatever you like.

I don't believe you can interact with the filesystem, either reading or writing, unless you resort to something outside of vanilla javascript - like Google Gears, Silverlight, and Flash.