express integrating middleware into a callback response - node.js

Question

I have middleware (API calls, not part of a route) which I want to use in a callback response.
// MIDDLEWARE EXAMPLE
var postInvoice = function(req, res){
function request(callback) {
var path='/xxx?';
var data = querystring.stringify( {
'action' : 'xxx',
'appkey' : 'xxx'',
'fromapi' : 'xxx',
'fromapiuser' : 'xxx',
'username' : 'xxx',
'shipmethod' : 'TEST',
'shipping' : '0',
'taxes' : '0'
});
var options = {
port: 443,
host: xxx,
path: path,
method: 'POST',
headers: {
'Content-Type': 'application/x-www-form-urlencoded',
'Content-Length': data.length
}
};
var postRequest = http.request(options, function(res) {
res.setEncoding('utf8');
res.on('data', function (chunk) {
console.log('Invoice Response: ' + chunk);
});
});
postRequest.write(data);
}
request(function(responseData) {
console.log(responseData);
});
}
I need to access the response in another route (which itself includes callback via API)
app.get('/result', function(req, res){
var resourcePath = req.param('resourcePath');
function request(callback) {
var path = resourcePath
var options = {
port: 443,
host: xxx,
path: path,
method: 'GET'
};
var postRequest = http.request(options, function(res) {
res.setEncoding('utf8');
res.on('data', function (chunk) {
jsonRes = JSON.parse(chunk);
return callback(jsonRes);
});
});
postRequest.end();
}
request(function(responseData) {
console.log(responseData);
// this is where I invoke the middleware,
if(some response condition is met) {
postinvoice();
}
res.render('result', {
check: check,
response: checkout_msg
});
});
});
I'm able to view the 'Invoice Response' in console, but I cannot manipulate it in the /result route. I'd like to be able to invoke the middleware, create locals and make the locals available in /result route.
thank you,

Answer 1

try this
var postRequest = http.request(options, function (response) {
var body = '';
response.setEncoding('utf8');
response.on('data', function (chunk) {
body += chunk;
});
response.on('end', function () {
body = JSON.parse(body); //if response is json
return callback(body);
});
});