Seems pointless to get the guarantee in the first place when you can just return the data and let the client render that as HTML as it sees fit (if it's even going to render it at all).

You say: we have no test whatsoever, so we have no particular reason to create this JSON endpoint. The resulting JSON can be then used as a body of an HTTP request, returned as a Webhook's response, etc. Is that really so? Indeed, but since there is little motivation for that to ever be the case, I don't see the point. When they click to another protected page, the process repeats. Find out with this in-depth article. When the API returns HTML, the only thing you can do (easily) with that HTML is display it as some part of a larger page. But now, you have a basic understanding of their main differences so you can decide on how you should move forward for your particular situation. Many mobile apps use JSON (most common format) to exchange data. GTmetrix Updates its Algorithm to Use Google’s Lighthouse Metrics, Why Self-Hosting Google Fonts Isn’t Recommended, How to Take Your Online Business to the Next Level: Cache Your Site and Make It Faster, What Are Cache-Control HTTP Headers?

"", "". a reasonable amount of data. It is easy for humans to read and write. For one thing, when you are building up a portion of a web page using HTML returned by the server, you are working server-side. Where to start dissecting this racing track? Are there some areas where you are still unclear of the differences between them?

Why we use them ? And here lies the biggest question: does it really need to be an API? JSON file ends with .json extension but it is not compulsory to store the JSON data in a file. @Andy To be perfectly honest, it's actually Generic Message Transfer Protocol: nothing about it is specific to transfering hypertext, opposed to FTP, which talks a lot about things specific to files and directories. Related: Is it OK to return HTML from a JSON API? This also means that JSON web tokens tend to be a lot more scalable as a result. It was not until I asked "the programmer" that he told me it was returning HTML and being appended directly to the DOM with innerHTML. Finally, JSON can scale better. The second one is also fine. So, using JSON and using innerHTML are by no means alternative exclusive approaches; they can be used together. Zero. Don't do that. I'd say that having no tests is a very good reason to start writing some. Yikes! Create a folder called data, inside this folder create a file called countries.json.

It’s similar to a claim because a claim would have a few details about you that’s saved after you log in or otherwise have your identity authorized in order to visit password-protected pages. Before getting into the differences between JSON web tokens and session cookies, it’s essential to first understand their main similarity. Every endpoint should strive for communicating with as little content as possible. @Jules lots of things are reasonably common, that's not a reason why they are reasonable. With that said, I have a significant problem with this: I'm gonna tell you this: an endpoint that returns HTML reduces your

And just yesterday I ran into code that put two items into an array, turned the array into JSON, put the JSON into a string, put the string inside an array, turned the whole array into JSON, sent it to the client, which decoded the JSON, got an array containing a string, took the string, extracted the JSON from the string, decoded the JSON, and got an array with two items. @DeadMG Little motivation for what to ever be the case? In fact, HAL+JSON and HAL+XML bear a striking resemblance to HTML. Now you have back-end programmers, who by definition aren't your best html writers, handling these updates. Also: See more JSON examples. The JSON values can only be one of the six datatypes (strings, numbers, objects, arrays, Boolean, null). But since there's nothing wrong with returning HTML, what you are losing by not using JSON/XML is basically the possibility of using your endpoint as an API.

And although you don't have tests at the moment, long term maintenance of a less noisy protocol would be cheaper than the one above it. I'm using JSON and degrading gracefully, so how do I prevent duplicate code?

This allows multiple, different presenters, such as both a mobile app and a web page, to consume the same data. That is literally what this whole SE question is about. For the server to return HTML? You receive some enterprise legacy code and upon inspecting it, find that they do what's described in step 1.

If, in the distant future, the application design or layout changes, it's easier to work with a proper data format than HTML output. A website? Checking if the access token is valid or expired. You can put JSON in a file. In other words, both options keep your logged in status on record so you can browse as many password-protected pages of a website as you want without having to sign in again – at least for the duration of your visit, or until you log out. Then, that session ID is stored in a session cookie on the user’s browser. There would be little wrong with an endpoint returning sidebar ads as a bit of HTML, or perhaps a footer, or similar elements. Plus, you've spread your HTML across both the client and server code. JSON Web Tokens vs.

Self-hosting Google Fonts seem like a good way to speed up your website. Now the HTML fragment that comes back causes horizontal scrolling because its assumptions about the side bar width no longer hold. What are you waiting for? Or render it in another application which is not rendered in HTML. That's a bad idea no matter how you cut it. site design / logo © 2020 Stack Exchange Inc; user contributions licensed under cc by-sa. The point is that you have now split up knowledge that should be centralized in a single place (namely the presentation logic), and this makes it more difficult to make sure all the pieces fit together correctly. Not a single one. Composer uses JSON.

Not so with an HTML parser. When I first started learning PHP (about 5 or 6 years ago) I learned about Ajax, and I went through "the phases": As I worked with this legacy codebase, I didn't even consider that it could return HTML (I mean, we're professionals now, right? The horror! Session Cookies: What’s the Difference? If you are populating a web page with data, use JSON. If your client is forced to read the payload and pry open information bits from it with loops and if-statements, then it is not effectively parse-able.

Of course one of my tasks includes proposing approaches for testing the whole thing, but at the moment we're not tackling that yet. JSON has nothing to do with HTTP.

If you send HTML instead and expect the client to extract the data from the HTML, that's rubbish. It takes little footprint. This all depends on the purpose of the API, but generally what you describe is a pretty strong violation of separation of concerns: In a modern application, API code should be responsible for data, and client code should be responsible for presentation. Feel free to share your thoughts in the comments below. Why should this always be the case? But then you don't have an API). Return a partial page plus code, and have the code fetch pre-rendered blocks of HTML that it can drop into the page. After a user signs in, a session is securely created by the server.

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