Node JS Promises not working on local server - node.js

Question

I created "small" server that shoud use NodeJs and promises to copy and compres files of given type from given directory. It had to be separeted, each in promise - reading files and packing them. First I created just those promises to check if they would work, and they did:
function packFile(file){
var fileName = path.basename(file);
console.log(' (+) Add to the archive : ' + fileName + ' ['+file+']');
archive.append(fs.createReadStream(file), { name:fileName });
}
Q.nfcall(recursive, pathGiven, filterGiven)
.then(function(data) {
var chain = Q.when();
for(var i = 0; i < data.length; i++){
console.log(' > '+data[i]+' > adding to chain ...');
chain = chain.then(packFile.bind(this, data[i]));
}
chain.then(function() {
archive.finalize();
});
Ofc, i added, in front of previouslty presented code:
fs = require('fs');
archiver = require('archiver');
Q = require('q');
recursive = require('recursive-readdir');
path = require('path');
All those were isntalled and working fine. "archive" is also corrently initialized at the beggining.
Since all worked- it was time to get on with a server:
//Lets require/import the HTTP module
var http = require('http');
//Lets define a port we want to listen to
const PORT=8080;
//Create a server
var server = http.createServer(handleRequest);
//Lets start our server
server.listen(PORT, function(){
console.log("Server listening on: http://localhost:%s", PORT);
});
Function "handleRequest" is quite big, so to get just the gist of it i will place part where is shoud handle those promises:
switch(request.url) {
case '/formhandler':
if (request.method == 'POST') {
// (...) Got my "Sour" (Path to source directory ) and "Mask"
// Here i tried to place that promise chain, but server just skipped it and continued
Q.nfcall(recursive, Sour, Mask)
.then(function(data) {
var chain = Q.when();
for(var i = 0; i < data.length; i++){
console.log(' > '+data[i]+' > adding to chain ...');
chain = chain.then(packFile.bind(this, data[i]));
}
chain.then(function() {
console.log("whole chain resolved");
console.log('FINISHING');
archive.finalize();
});
});
// (...) Finishing this request
}
break;
}
Nothing I do seems to work. As long as I use those promises (calling them like that or in some function). I have no idea why.
EDIT 1
What i mean by skipped - I placed 2 console.log before and after promises in that handler. I shoud see:
LOG1
TEXT_FROM_PROMISES //Something those promises send to console.log
LOG2
But there was only:
LOG1
LOG2
And server was ready to get another request.
EDIT 2
Some suggested in comments to change packFile so it would return promise, so i did:
function packFile(file){
return new Promise(function(resolve,reject){
var fileName = path.basename(file);
console.log(' (+) Adding to the archive : ' + fileName + ' ['+file+']');
archive.append(fs.createReadStream(file), { name:fileName });
});
}
Rest of the code is unchanged. Result is - Now ONLY FIRST from this chain will be performed (if I call it "alone" in script, without server) and it still wont work on server.
EDIT 3
I changed 'packFile' again:
function packFile(file){
return new Promise(function(resolve,reject){
var fileName = path.basename(file);
console.log(' (+) Adding to the archive : ' + fileName + ' ['+file+']');
archive.append(fs.createReadStream(file), { name:fileName });
resolve("Success!");
});
}
Not whole chain will work - for no-server version, but still - nothing happen on server.
EDIT 4
I changed
Q.nfcall(recursive, pathGiven, filterGiven)
.then(function(data) {
var chain = Q.when();
for(var i = 0; i < data.length; i++){
console.log(' > '+data[i]+' > adding to chain ...');
chain = chain.then(packFile.bind(this, data[i]));
}
chain.then(function() {
console.log("whole chain resolved");
archive.finalize();
});
}, function(reason) {
console.log("ERROR:"+reason); // Error!
});
and got some new error in console:
ERROR:TypeError: ignores.map is not a function
EDIT 5
Code I use for archive, just to make and open .zip to add files to with my 'packFile'
archive = archiver.create('zip', {});
var output = fs.createWriteStream('./output.zip');
archive.pipe(output);
EDIT 6
Since there seems to be need for more code, tehre is function I call on my server whenever i recive proper request (-> check beggining of this post)
function handleWithPromises(pathGiven, filterGiven){
console.log(' > Promising ...');
archive = archiver.create('zip', {});
var output = fs.createWriteStream('./output.zip');
archive.pipe(output);
function packFile(file){
return new Promise(function(resolve,reject){
var fileName = path.basename(file);
console.log(' (+) Adding to the archive : ' + fileName + ' ['+file+']');
archive.append(fs.createReadStream(file), { name:fileName });
resolve("Success!");
});
}
Q.nfcall(recursive, pathGiven, filterGiven)
.then(function(data) {
var chain = Q.when();
for(var i = 0; i < data.length; i++){
console.log(' > '+data[i]+' > adding to chain ...');
chain = chain.then(packFile.bind(this, data[i]));
}
chain.then(function() {
console.log('FINISHING');
archive.finalize();
});
});
}
and code that is placed at the very begging of script:
fs = require('fs');
archiver = require('archiver');
Q = require('q');
recursive = require('recursive-readdir');
path = require('path');

Answer 1

Go back to Edit 1 where you expected to see
LOG1
TEXT_FROM_PROMISES //Something those promises send to console.log
LOG2
but got
LOG1
LOG2
An explanation is that A+ compliant promises interface with the event loop scheduler to execute functions supplied with then in their own thread, after the thread that called then executes to completion.
Chained promises execute asynchronously to the code that defines them.
On a very simplistic level, you will need to postpone ending the request until all files have been packed by making sure response is in function scope of the last anonymous function and ending the response there:
chain.then(function() {
console.log('FINISHING');
archive.finalize();
response.write(...) // are you sending the archive back?
response.end(); // now end the request
});