I know this looks repetitive, but it is a little bit different than the other question here.
I am using Node with the expressJS routing and passportJS login and in my login page I have a dropdown list to select a value that I want to pass along to my Angular script.
In my app.js I have:
var languages = [
{"lang": "English", "code": "en"},
{"lang": "Chinese", "code": "zh-cn"}
];
app.get('/', detectBrowser, routes.index);
app.get('/login', routes.login(isSameSubnet, languages));
index.js:
exports.index = function(req, res){
res.render('index', { login: 'Some String' });
};
exports.login = function(language) {
return function(req, res) {
res.render('login', { lang: language });
};
};
login.jade:
label.control-label Language
select.form-control
each val, index in lang
option(value= val.code)= val.lang
So how can I grab the value of the option tag back to my javascript and pass it to the next stage (AngularJS)?
I know how to get the information from the exports.index on the Angular side, but I don't know how to get the information I want and use it on this index function.
Thanks
Related
I have simple get route in my app.js file,
app.get('/crm/traveller/editForm/:id/:trv_id', passportConfig.isAuthenticated, function (req, res) {
console.log(">>>>>>>>>>>>>", req.params);
crm2.crmTravellerEditForm(req, res);
});
as per above code i have set two params by name of "id" and "trv_id",
i have console logged req.params
GET /crm/traveller/editForm/1102/121 200 7582.166 ms - -
>>>>>>>>>>>>> { id: '1102', trv_id: 'AxisBanner_file_1627882199782_Capture2.PNG' }
so when i enter "localhost:8083/crm/traveller/editForm/1102/121", expected params were id = 1102 and trv_id = 121 but in console.log i m getting some image in req.params.trv_id
Any help would be appreciated.
Thank you.
I am still pretty new to NodeJS and I am using the express and express-handlebar packages.
However, the 'if-statement' does not work properly, in fact not at all. I suppose the reason for this is that I do not use a template for the if-statement.
Using just the package 'handlebars', I would go with:
rs.readFile('files/test.hbs', 'utf-8', function(err, data)
{
var template = hbs.compile(data);
var result = template ({name: 'name', value1: 'value1', value2: 'value2'});
res.end (result);
...
}
This solution works actually.
However, I have already used express-handlebars in the entire code and would like to keep on using it. I got following code:
//I´ll receive value1 and value2 later either directly from my database or with the help of MQTT
var value1 = ' value1';
var value2 = 'value2';
var name = 'name';
var helpers={
value1:function(){return value1;},
value2:function(){return value2;},
name: function(){return name;}
}
router.get('/', function(req, res){
res.render('index', {helpers});
});
My html code looks like following:
<div>
<h1> {{value1}} </h1>
<h2> {{value2}} </h2>
{{#if name}}
<h3> hello there! </h3>
{{/if}}
</div>
value1 and value 2 are shown properly. 'hello there!' isn´t as I suppose it is not a template.
Does anyone know how I can make code work with express-handlebars?
I just answered it by myself.
The solution is:
router.get('/', function(req, res){
res.render('index', {
name,
helpers});
});
add this in server.js
const isEqual = function(a, b, opts) {
if (a == b) {
return opts.fn(this)
} else {
return opts.inverse(this)
}
}
var hbs = require('hbs');
hbs.registerHelper('if_eq', isEqual);
Im new to Node.js and keep getting the Error: Route.get() requires callback functions but got a [object Undefined] error
and Ive checked out the following question and either dont understand or im still doing something wrong
Express routes: .get() requires callback functions but got a [object Object]
.get() requires callback functions but got a [object Undefined]
Error: Route.get() requires callback functions but got a [object Undefined]
Node Route.get() requires callback function but got a [object undefined]
my file structure is
server.js
routes/api/geolocations.js
routes/api/geolocations/regions.js
routes/api/geolocations/destination.js
ROOT: server.js
var geolocation = require('./routes/api/geolocation')(app);
app.get('/geolocation/', geolocation.delegate);
then I pass my data to routes/api/geolocations.js by using
geolocation.delegate(unparsedData);
from there I parse the data and send it down it's appropriate child routes.
PARENT: geolocations.js in my routes/api/geolocations.js
var destination = require('./geolocations/destination');
var region = require('./geolocations/region');
module.exports = function(app) {
return {
app.get('./geolocation/region', region.delegate);
app.get('./geolocation/destination', destination.delegate);
delegate: function(unparsedData, req, res) {
var data =[setup package for child states using unparsedData]
//HERE Id like to pass the new `data` to region or destination using the following
region.delegate(data);
//OR
destination.delegate(data);
CHILDREN: region.js / destination.js in routes/api/geolocations/regions.js or routes/api/geolocations/destination.js
module.exports = function(app) {
return {
delegate: function(data, req, res) {
...do stuff
}
}
}
UPDATE: I guess I dont know where to set up my routes, in server.js or if i can in geoloaction.js, does it matter, do need to do something like this in server.js?
var regions = require('./routes/api/geolocation/regions')([pass stuff here]);
geolocation.get('./routes/api/geolocation/regions', regions.delegate);
You should use express.js easy setup and run.
Simply download IntelliJ IDEA, find free version, then install. Then run the application and goto File->Setting->Plugin and search for NodeJS then install. Followed to this you need to Enable it. To do this goto File->Setting->Language & Frameworks->open arrow-> JavaScriptopen arrow->Libraries->Enable Node.js Core.
File Structure
routes/api/geolocations.js
routes/api/geolocations/regions.js
routes/api/geolocations/destination.js
You can have a look at the below code that might help you get started.
//------------------------------------------------------------------------
var express = require('express');
var router = express.Router();
var regions = require('../api/geolocations/regions');
var destination = require('../api/geolocations/destination');
//------------------------------------------------------------------------
//------------------------------------------------------------------------
/* geolocation.js */
router.get('/', function(req, res, next) {
var region_ext = regions.to_export;
var destin_ext = destination.to_export;
res.render('index', {
title: 'Geolocation',
region: region_ext,
destination:destin_ext
});
});
module.exports = router;
//------------------------------------------------------------------------
//------------------------------------------------------------------------
/* region.js */
var to_export = function () {
return 'this is from regions';
}
module.exports.to_export = to_export();
//------------------------------------------------------------------------
//------------------------------------------------------------------------
/* destination.js */
var to_export = function () {
return 'this is from destination';
}
module.exports.to_export = to_export();
//------------------------------------------------------------------------
//------------------------------------------------------------------------
//In app.js, just change
var routes = require('./routes/api/geolocations');
//------------------------------------------------------------------------
jfriend00 is right, You got a little mess there. Maybe you should consider make use of next(), since if you use it the other middlewares will have a chance of manipulating the request.
I have
epilogue.resource({
model: db.Question,
endpoints: ['/api/questions', '/api/questions/:id'],
associations: true
});
So when I hit /api/questions, I get back all the associations with the resources. Is there something I can pass to not get the associations in certain cases? Or should I create a new endpoint:
epilogue.resource({
model: db.Question,
endpoints: ['/api/questions2', '/api/questions2/:id']
});
One way of doing is by using milestones you can define milestone for list and read behaviour in certain case, you have access to req object so you can do changes accordingly
https://github.com/dchester/epilogue#customize-behavior
Here is an example of list call modification
// my-middleware.js
module.exports = {
list: {
write: {
before: function(req, res, context) {
// modify data before writing list data
return context.continue;
},
action: function(req, res, context) {
// change behavior of actually writing the data
return context.continue;
},
after: function(req, res, context) {
// set some sort of flag after writing list data
return context.continue;
}
}
}
};
// my-app.js
var epilogue = require('epilogue'),
restMiddleware = require('my-middleware');
epilogue.initialize({
app: app,
sequelize: sequelize
});
var userResource = epilogue.resource({
model: User,
endpoints: ['/users', '/users/:id']
});
userResource.use(restMiddleware);
so I'm learning NodeJS and javascript in general, and playing around with it and I have some problems parsing a JSON. I receive the following from the "user":
{
"sync_contact_list": [
{
"name": "c",
"number": "789",
"email": ""
},
{
"name": "b",
"number": "123",
"email": "a#a.com"
},
{
"name": "a",
"number": "416",
"email": ""
}
]
}
My question is how can i properly parse this to get the individual bits:
{
"name": "a",
"number": "416",
"email": ""
}
I've been trying to do it by doing var jsonObject = JSON.parse(req.body); ,but I keep getting parsing errors, no matter how I vary the JSON that I do receive (individual components, all of it, etc).
Could anyone one point out what I'm doing wrong?
EDIT:
So i use express to deal with the different paths. So i have app.js:
var express = require('express')
, routes = require('./routes')
//var mysql = require('mysql');
var app = module.exports = express.createServer();
// Configuration
app.configure(function(){
app.set('views', __dirname + '/views');
//app.set('view engine', 'jade');
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(app.router);
app.use(express.static(__dirname + '/public'));
});
app.configure('development', function(){
app.use(express.errorHandler({ dumpExceptions: true, showStack: true }));
});
app.configure('production', function(){
app.use(express.errorHandler());
});
// Routes
//app.post('/', routes.syncServiceIndex);
app.post('/syncService', routes.synchServicePost);
app.get('/syncService/:syncServiceUser/sync', routes.synchServiceSync);
app.post('/syncService/:syncServiceUser/push', routes.synchServicePush);
app.del('/syncService/:syncServiceUser', routes.synchServiceDel);
app.post('/syncService/:syncServiceUser/contacts/push', routes.synchServiceContactsPush);
app.get('/syncService/:syncServiceUser/contacts/sync', routes.synchServiceContactsSync);
app.post('/syncService/:syncServiceUser/contacts/', routes.synchServiceContactsPost);
app.get('/syncService/:syncServiceUser/contacts/:contactId', routes.synchServiceContactsGet);
app.put('/syncService/:syncServiceUser/contacts/:contactId', routes.synchServiceContactsPut);
app.del('/syncService/:syncServiceUser/contacts/:contactId', routes.synchServiceContactsDel);
app.listen(3000);
console.log("Express server listening on port %d in %s mode", app.address().port, app.settings.env);
And then I have index.js, where I basically have the following for each route.
exports.synchServicePost = function(req, res) {
console.log('synchServicePost');
console.log("BODY:"+JSON.stringify(req.body));
var jsonObject = JSON.parse(req.body);
res.statusCode = 200;
res.send("OK\n");
}
The request is made with a line free JSON:
curl -i -d "{'sync_contact_list':[{'name':'c','number':'789','email':''},{'name':'b','number':'123','email':'a#a.com'},{'name':'a','number':'416','email':''}]}" http://localhost:3000/syncService
EDIT: I realized I should probably change the Content Type to application/json. in this case, for JSON.stringify I get the following:
SyntaxError: Unexpected token ILLEGAL
at parse (native)
at IncomingMessage.<anonymous> (/home/alex/peekcode/quipmail/synch/node_modules/express/node_modules/connect/lib/middleware/bodyParser.js:71:15)
at IncomingMessage.emit (events.js:61:17)
at HTTPParser.onMessageComplete (http.js:133:23)
at Socket.ondata (http.js:1029:22)
at Socket._onReadable (net.js:677:27)
at IOWatcher.onReadable [as callback] (net.js:177:10)
Maybe it is already parsed? I do not know (I did not see your whole code).
If it is (or you will parse it the way you need), then specific "bits" will be available like that (see this jsfiddle for a proof):
for (var i=0; i<jsonObject['sync_contact_list'].length; i++){
// here jsonObject['sync_contact_list'][i] is your current "bit"
}
Within the loop, between iterations, jsonObject['sync_contact_list'][i] changes between the "bits", because i changes and points to the first element, then to the second, and so on, until the last element.
So it turns out my JSON was badly formatted. Bad habit I got from working on a Java project. Once that part was fixed, my request was getting parsed by default, which caused some other headache until I found out about node-inspector.
As a result, I'm selecting Tadeck as having the right answer.
for(count in sync_contact_list) {
console.log('individual json objects list', JSON.stringify(sync_contact_list[count]));
}