CODEWITHSUNDEEP
node.js
Ali
Ali

Reputation: 10463

make request and response available in scope node js

I have this module.exports

module.exports = {
  defaultStrings: function() {
    return "Hello World" +
           "Foo - Bar";
  },
  urlSlug: function(s) {
    return s.toLowerCase().replace(/[^\w\s]+/g,'').replace(/\s+/g,'-');
  }
};

I want to be able to use request or response inside function defaultStrings how would I include that with a minimum change of the given code?

  defaultStrings: function(req, res, next) { // <--- This is not working it says Cannot call method 'someGlobalFunction' of undefined
    return "Hello World" +
           "Foo - Bar" + req.someGlobalFunction();
  },

In my app.js I require the file in

strings = require('./lib/strings'),

And this is how it is being called inside app.js

app.get('/',
        middleware.setSomeOperation,
        routes.index(strings);

Upvotes: 0

Views: 266

Answers (2)

gr3co
gr3co

Reputation: 893

When are you calling defaultStrings? If you are calling it directly from your routes i.e. by using app.get("some_url", defaultStrings), then req and res should be available to you.

EDIT: It appears that you were calling it by: content = strings.defaultStrings(); inside of your index function. In order to pass on the req and res arguments you must simply change your call to content = strings.defaultStrings(req,res,cb), where cb is the callback defined by index.

Upvotes: 2

martingreber
martingreber

Reputation: 636

I'm assuming you're using node.js with express.

If you want access to the http request and response you've got a few options:

Add function myMiddleware as a middleware for all routes

var myMiddleware = function(req, res, next) {
  console.log(req.route); // Just print the request route
  next(); // Needed to invoke the next handler in the chain
}

app.use(myMiddleware); //This will add myMiddleware to the chain of middlewares

Add function myMiddleware as a middleware for a specific route

var myMiddleware = function(req, res, next) {
  console.log(req.route); // Just print the request route
  next(); // Needed to invoke the next handler in the chain
}

app.get('/', myMiddleware, function(...) {}); //This will add myMiddleware to '/'

Add function myHandler as a route handler

var myHandler = function(req, res) {
  console.log(req.route); // Just print the request route
  send(200); // As the last step of the chain, send a response
}

app.get('/', myHandler); //This will bind myHandler to '/'

Upvotes: 0

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