What specific occurrences or processes initiate an HTTP POST request?

When considering the code snippet from an express app:

var express = require('express');
var router = express.Router();
var standupCtrl = require('../controllers/standup.server.controller');

/* GET home page. */
router.get('/', function(req, res) {
  return standupCtrl.list(req, res);
});

/* POST filter by member name - home page. */
router.post('/', function(req, res) {
    return standupCtrl.filterByMember(req, res);
});

// ............ more code here

module.exports = router;

exports.list = function(req, res) {
    var query = Standup.find();

    query.sort({ createdOn: 'desc'}).limit(12).exec(function(err, results){
           res.render('index', {title: 'Standup - List', notes: results});
        });

};

exports.filterByMember = function(req, res) {
    var query = Standup.find();
    var filter = req.body.memberName;

    query.sort({ createdOn: 'desc' });

    if (filter.length > 0)
    {
        query.where({ memberName: filter})
    }

    query.exec(function(err, results) {
        res.render('index', { title: 'Standup - List', notes: results });
    });
};

Regarding form submission, it is common to use the methods get/post. In this case, with no specific method declared, how does the server determine whether to trigger a post or get action when a user visits the homepage '/'?

Overall, the question arises:

What exactly triggers a Post/Get action in cases where it is not explicitly mentioned?

(PS: It is known that entering a URL in a browser triggers a GET request)

Thank you for your help!

Answer №1

HTTP GET is typically the standard method used if not specified otherwise.

Most POST requests are generated either through form submissions, AJAX calls, or as part of a web service call (such as RPC from another server). While it is possible to manually create POST requests using tools like curl, this is not common practice. In most toolkits, the default method is GET.

Occasionally, you may encounter a situation where a service provider (such as an IoT or embedded device) only supports POST requests for efficiency reasons.

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