Where are get, post methods defined in ExpressJS?

Question

I'm unable to find the code of get or post methods. I haven't found them in expressjs lib folder, so it's probably that they are present in one of the js files the Router requires.

var express = require('express');
var router = express.Router();

var Blah = require('../modules/Blah');

router.post('/', function(req, res, next) {
  Blah.foo(req, res);
});

I need it to find out where the next parameter is passed to that callback function above, because it has to be done by ExpressJS framework under the hood.

score 1 · Answer 1 · answered Nov 24 '15 at 11:27

1

Express uses the methods module to dynamically attach http verbs to the router :

lib/router/index.js :

// create Router#VERB functions

methods.concat('all').forEach(function(method){

  proto[method] = function(path){

    var route = this.route(path)

    route[method].apply(route, slice.call(arguments, 1));

    return this;

  };

});

answered Nov 24 '15 at 11:27

KeatsPeeks

19,126
5
52
83

Plus one for posting your answer faster than me. ;) – rsp Nov 24 '15 at 11:35

rsp · Answer 2 · 2015-11-24T11:40:24.533

1

See the answer by KeatsPeeks for more details. Here are some links to specific parts of the source code that might be helpful:

get and post methods are defined in the methods module here: https://github.com/jshttp/methods/blob/master/index.js#L14-L15
Here in lib/applciation.js the .METHOD calls for them are delegated to router.METHOD: https://github.com/strongloop/express/blob/master/lib/application.js#L471-L484
The rest is in lib/router/index.js: https://github.com/strongloop/express/blob/master/lib/router/index.js#L506-L513
And in lib/router/route.js - search for "methods" in: https://github.com/strongloop/express/blob/master/lib/router/route.js

edited Nov 24 '15 at 11:40

answered Nov 24 '15 at 11:33

rsp

107,747
29
201
177

Thanks! Even though I have all this now, I was unable to find exact line where the callback method is called from post method (I mean this callback function- `function(req, res, next)` here: `router.post('/', function(req, res, next)`.) – user107986 Nov 24 '15 at 15:12
In short, I'd like to see the source of the `next` method (see here: http://stackoverflow.com/questions/8710669/having-a-hard-time-trying-to-understand-next-next-in-express-js ) – user107986 Nov 24 '15 at 15:23

Where are get, post methods defined in ExpressJS?

2 Answers2