12 - Get Data from POST Requests - Basic Node and Express - freeCodeCamp Tutorial

We can retrieve the data that body-parser captured from the form during a POST request from the request's body field. This is done by setting up a POST route for the form, running the urlencoded function, followed by our own middleware function. Link to challenge : https://www.freecodecamp.org/learn/apis-and-microservices/basic-node-and-express/get-data-from-post-requests Written Guide : https://www.notion.so/ganeshh123/Get-Data-from-POST-Requests-becb31b940214d35ae096a2ffa94de33 Full Playlist for this course : https://www.youtube.com/playlist?list=PLhGp6N0DI_1SdIZ3uhbXnKAq2UcICSnWS All Writen Guides for this course : https://www.notion.so/ganeshh123/dab5e189407244c793c2f32d066eee9f All My Tutorials can be found at : https://www.notion.so/Tutorials-Ganesh-H-293ea420d34a464f9a1907e0405b5f26 Concepts: bodyParser.urlencoded() Returns middleware that only parses urlencoded bodies and only looks at requests where the Content-Type header matches the type option. This parser accepts only UTF-8 encoding of the body and supports automatic inflation of gzip and deflate encodings. A new body object containing the parsed data is populated on the request object after the middleware (i.e. req.body). This object will contain key-value pairs, where the value can be a string or array (when extended is false), or any type (when extended is true). https://github.com/expressjs/body-parser#bodyparserurlencodedoptions request.body Contains key-value pairs of data submitted in the request body. By default, it is undefined, and is populated when you use body-parsing middleware such as express.json() or express.urlencoded(). https://expressjs.com/en/api.html#req.body app.post() Routes HTTP POST requests to the specified path with the specified callback functions. https://expressjs.com/en/api.html#app.post.method Middleware Middleware functions are functions that have access to the request object (req), the response object (res), and the next middleware function in the application’s request-response cycle. The next middleware function is commonly denoted by a variable named next. http://expressjs.com/en/guide/using-middleware.html response.json() Sends a JSON response. This method sends a response (with the correct content-type) that is the parameter converted to a JSON string using JSON.stringify(). The parameter can be any JSON type, including object, array, string, Boolean, number, or null, and you can also use it to convert other values to JSON. https://expressjs.com/en/api.html#res.json -————————————————————————————————————- Node.js is an open-source, cross-platform, JavaScript runtime environment that executes JavaScript code outside a web browser. Node.js lets developers use JavaScript to write command line tools and for server-side scripting—running scripts server-side to produce dynamic web page content before the page is sent to the user's web browser. Express.js, or simply Express, is a web application framework for Node.js. It is designed for building web applications and APIs. It has been called the de facto standard server framework for Node.js. Express runs between the server created by Node.js and the frontend pages of a web application. Express also handles an application's routing. freeCodeCamp (also referred to as “Free Code Camp”) is a non-profit organization that consists of an interactive learning web platform, an online community forum, chat rooms, online publications and local organizations that intend to make learning web development accessible to anyone. Beginning with tutorials that introduce students to HTML, CSS and JavaScript, students progress to project assignments that they complete either alone or in pairs. Upon completion of all project tasks, students are partnered with other nonprofits to build web applications, giving the students practical development experience. Thanks for Watching!