achiver zip compress download comptible with ie 6 filefox chrome.NOTE: Only a example and can not run derectly

achiver-download.js

var fs = Npm.require('fs');
var path = Npm.require('path');
var archiver = Npm.require('archiver');

var req = this.request;
var res = this.response;

//create archiver class
var zip_name; //must with .zip ext. for example xxx.zip
var archive = archiver('zip', {
	name: zip_name
});

var userAgent = (req.headers['user-agent'] || '').toLowerCase();
var contentDisposition;
if (userAgent.indexOf('msie') >= 0 || userAgent.indexOf('chrome') >= 0) {
	contentDisposition = 'attachment; filename=' + encodeURIComponent(zip_name);
} else if (userAgent.indexOf('firefox') >= 0) {
	contentDisposition = 'attachment; filename*="utf8\'\'' + encodeURIComponent(zip_name) + '"';
} else {
	/* safari and other browsers */
	contentDisposition = 'attachment; filename=' + new Buffer(zip_name).toString('binary');
}
res.writeHeader(200, {
	"Content-Type": "application/zip",
	'Content-disposition': contentDisposition
});

res.on('end', function() {
	return res.send('OK').end();
});

for (var i = 0; i < files.length; i++) {
	var ab_path = path.join(files[i].save_path, files[i].gen_save_path, files[i].save_name);
	if (fs.existsSync(ab_path)) {
		var fstream = fs.createReadStream(ab_path);
		//设定关闭流操作
		fstream.on('close', function() {
			this.close();
		});
		archive.append(fstream, {
			name: files[i].file_name
		});
	} else {
		return return_404(res);
	}
}