meteor---在合并打包多个文件ZIP下载的功能

实现多个文件边打包边下载的功能，速度还可以，本人亲测，欢迎大家来指点archiver --用NPM安装这个模块---本人文件存储在file-collection 中,可以用fs ：

fs.createReadStream(file)

更多带包工具请见 http://stackoverflow.com/questions/20107303/dynamically-create-and-stream-zip-to-client

var fail = function(response,message) {
response.writeHead(200);
var str = "notfound:";
if(message){
str += message;
}
response.end(str);
};

WebApp.connectHandlers.use(‘/my/download‘,function(req, res, next) {
try {
var ple_code = req.query.ple_code;
var cps_id = req.query.cps_id;
if(ple_code === undefined || cps_id === undefined){
fail(res);
}
var docs_latest = Customor.find({
cps_id: cps_id
}).fetch();
var doc_id_arr = [];
var file_obj = Files.findOne(new Meteor.Collection.ObjectID(ple_code));
if(!file_obj){
fail(res,‘ple notfound‘);
}
doc_id_arr.push({
doc_id: ple_code,
doc_name: file_obj.filename
});
docs_latest.map(function(item) {
_.map(item.docs_ar, function(k) {
var file_obj_tmp = Files.findOne(new Meteor.Collection.ObjectID(k));
doc_id_arr.push({
doc_id: k,
doc_name: file_obj_tmp.filename
});
});
});

res.writeHead(200, {
‘Content-Type‘: ‘application/zip‘,
‘Content-disposition‘: ‘attachment; filename=myfile.zip‘
});
var archiver = Meteor.npmRequire(‘archiver‘);
var zip = archiver(‘zip‘);

// Send the file to the page output.
zip.pipe(res);
_.map(doc_id_arr,function(k){
var lolStream = Files.findOneStream(new Meteor.Collection.ObjectID(k.doc_id));
zip.append(lolStream, {name: k.doc_name});
});
zip.finalize();
} catch (error) {
fail(res,error);
}

});