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---
title: "Reading a local file with the File API"
layout: default
section: example
---
<h3>Choose the local(s) zip file(s)</h3>
<p class="note">Note : your browser will process the zip file, don't choose a file too big !</p>
<input type="file" id="file" name="file" multiple /><br />
<div id="error_block" class="alert alert-danger hidden">
You will need a recent browser to use this demo :(
</div>
<div id="result_block" class="hidden">
<h3>Content :</h3>
<div id="result"></div>
</div>
<script type="text/javascript" src="{{site.baseurl}}/test/jquery-1.8.3.min.js"></script>
<script type="text/javascript">
(function () {
if (!window.FileReader || !window.ArrayBuffer) {
$("#error_block").removeClass("hidden").addClass("show");
return;
}
var $result = $("#result");
$("#file").on("change", function(evt) {
// remove content
$result.html("");
// be sure to show the results
$("#result_block").removeClass("hidden").addClass("show");
// see http://www.html5rocks.com/en/tutorials/file/dndfiles/
var files = evt.target.files;
for (var i = 0, f; f = files[i]; i++) {
var reader = new FileReader();
// Closure to capture the file information.
reader.onload = (function(theFile) {
return function(e) {
var $title = $("<h4>", {
text : theFile.name
});
$result.append($title);
var $fileContent = $("<ul>");
try {
var dateBefore = new Date();
// read the content of the file with JSZip
var zip = new JSZip(e.target.result);
var dateAfter = new Date();
$title.append($("<span>", {
text:" (parsed in " + (dateAfter - dateBefore) + "ms)"
}));
// that, or a good ol' for(var entryName in zip.files)
$.each(zip.files, function (index, zipEntry) {
$fileContent.append($("<li>", {
text : zipEntry.name
}));
// the content is here : zipEntry.asText()
});
// end of the magic !
} catch(e) {
$fileContent = $("<div>", {
"class" : "alert alert-danger",
text : "Error reading " + theFile.name + " : " + e.message
});
}
$result.append($fileContent);
}
})(f);
// read the file !
// readAsArrayBuffer and readAsBinaryString both produce valid content for JSZip.
reader.readAsArrayBuffer(f);
// reader.readAsBinaryString(f);
}
});
})();
</script>
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