binary-format/sample/tar/tar.html

Two-way custom binary seralization

<script	src="https://raw.github.com/vjeux/jDataView/master/jquery/jquery-1.7.1-binary-ajax.js"></script>
<script src="https://raw.github.com/vjeux/jDataView/master/src/jdataview.js"></script>
<script src="../../src/jparser.js"></script>

<style>
textarea { width: 80%; height: 300px; }
</style>
<p>Content of the file <a href="jquery.tar">jquery.tar</a></p>

<script>
function untar(view) {
	var parser = new jParser(view, {
		oct: function (size) {
			return parseInt(this.parse(['string', size]), 8);
		},

		string0: function (size) {
			return this.parse(['string', size]).replace(/\0+$/, '');
		},

		padding: ['skip', function () {
			return (512 - (this.tell() % 512)) % 512;
		}],

		block: function (type) {
			var res = [];
			while (this.tell() < this.view.byteLength) {
				res.push(this.parse(type));
			}
			return res;
		},

		file: {
			name: ['string0', 100],
			mode: ['oct', 8],
			owner: ['oct', 8],
			group: ['oct', 8],
			size: ['oct', 12],
			modtime: ['oct', 12],
			checksum: ['oct', 8],
			link: ['oct', 1],
			name_linked: ['string0', 100],
			ustar: ['string', 6],
			ustar_version: ['oct', 2],
			owner_name: ['string0', 32],
			group_name: ['string0', 32],
			device: ['array', ['oct', 8], 2],
			name_prefix: ['string0', 155],
			padding1: 'padding',
			content: ['string', function () { return this.current.size; }],
			padding2: 'padding'
		},

		all: ['block', 'file']
	});

	var files = parser.parse('all');

	// Display the files

	for (var i = 0; i < files.length; ++i) {
		var file = files[i];
		var content = file.content;
		file.content = null; // Just for the display
		$('body').append($('<pre></pre>').html(JSON.stringify(file, null, '  ')));
		if (file.size) {
			$('body').append($('<textarea></textarea>').val(content));
		}
	}
}

// Download the file
$.get('jquery.tar', untar, 'dataview');

</script>